Toolkit/channelrhodopsins

channelrhodopsins

Multi-Component Switch·Research·Since 2022

Also known as: channelrhodopsin, channelrhodopsins, Channelrhodopsins, ChRs, light sensitive channels, light sensitive proteins

Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.

Summary

Channelrhodopsins are light-activated ion channels from algae used as optogenetic tools to control membrane potential. Reported channelrhodopsin variants conduct either cations or anions, enabling light-driven depolarization or hyperpolarization.

Usefulness & Problems

Why this is useful

Channelrhodopsins provide optical control of membrane voltage and thereby enable artificial modulation of neuronal activity. The cited literature places them within microbial rhodopsin optogenetics for analyses of synaptic transmission, neuronal network activity, and developmental systems such as Xenopus embryos after mRNA injection.

Source:

Channelrhodopsins and their variants are microbial rhodopsin optogenetic tools used to alter membrane potential with light. The abstract states that cation- or anion-conducting variants support depolarization or hyperpolarization.

Source:

optogenetic control of neuronal activity

Source:

membrane depolarization

Source:

membrane hyperpolarization

Problem solved

This tool addresses the need to drive or inhibit excitable cells with light by directly controlling membrane potential. The evidence specifically supports use for depolarization or hyperpolarization through cation- or anion-conducting channelrhodopsin variants.

Source:

They provide a way to drive or inhibit neuronal activity by controlling membrane potential optically.

Source:

light-controlled modulation of membrane potential

Published Workflows

Objective: Engineer and apply NIR upconversion optogenetic systems for more precise and efficient control of membrane ion channels, especially in deep tissues.

Why it works: The review frames the approach as using emissive UCNPs to convert NIR excitation into light that can actuate conventional light-gated channels or ligands, thereby retaining optical control while improving tissue penetration and reducing photodamage concerns associated with shorter wavelengths.

NIR-to-visible upconversionlight-gated ion channel activationlight-gated ligand-mediated channel regulationnanoparticle engineeringactuator-material couplingoptogenetic control

Stages

  1. 1.
    Engineering and incorporation of emissive UCNPs into light-gated channel or ligand systems(library_design)

    This stage establishes the core UCNP-actuator system needed for NIR control of membrane ion channels.

    Selection: Constructing upconversion optogenetic systems by incorporating multiple emissive UCNPs into various light-gated ChRs/ligands.

  2. 2.
    Technical improvement for precise and efficient membrane-channel control(functional_characterization)

    After building UCNP-coupled optogenetic systems, the review emphasizes technical improvements to make control more precise and efficient.

    Selection: Improving precision and efficiency of membrane channel control in the engineered upconversion optogenetic systems.

  3. 3.
    Refinement and advancement toward in vivo and clinical applications(in_vivo_validation)

    The review presents in vivo and clinical advancement as a later-stage goal after system engineering and performance improvement.

    Selection: Advancing NIR-mediated upconversion optogenetics into in vivo and potentially clinical applications.

Objective: Use time-resolved infrared spectroscopic approaches to investigate channelrhodopsin photocycle, ion channel gating, and conductance across the full kinetic range of the light response.

Why it works: The review states that channelrhodopsin dynamics span femtoseconds to minutes, so different IR approaches are needed to observe distinct mechanistic phases over that full range.

retinal isomerizationformation of conductive statesreturn to dark-adapted statetime-resolved infrared spectroscopymultiple spectroscopical approaches matched to kinetic regime

Stages

  1. 1.
    Ultrafast photochemical observation(functional_characterization)

    The review states that retinal isomerization occurs within femtoseconds, requiring an approach suitable for the ultrafast regime.

    Selection: Capture earliest light-induced molecular events immediately after photon absorption.

  2. 2.
    Conductive-state characterization(functional_characterization)

    The review identifies the microsecond regime as the timescale on which conductive states are reached.

    Selection: Measure molecular changes associated with formation of conductive states on the microsecond timescale.

  3. 3.
    Dark-state recovery characterization(secondary_characterization)

    The review states that return into the fully dark-adapted state may take more than minutes, so slower measurements are needed.

    Selection: Track return to the fully dark-adapted state over slow timescales.

Taxonomy & Function

Primary hierarchy

Mechanism Branch

Architecture: A composed arrangement of multiple parts that instantiates one or more mechanisms.

Target processes

recombinationsignaling

Input: Light

Implementation Constraints

Implementation requires light delivery and expression of channelrhodopsin proteins in target cells; one cited example used mRNA injection into 1–8 cell embryos. The evidence identifies channelrhodopsins as algal light-activated channels and supports use of engineered variants with either cation or anion conductance, but it does not specify cofactors, promoters, or construct architecture.

The supplied evidence does not provide quantitative performance metrics such as action spectrum, conductance, kinetics, light sensitivity, or trafficking behavior for specific channelrhodopsin variants. It also does not document direct validation for recombination control, even though signaling-related membrane potential modulation is supported.

Validation

Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication

Supporting Sources

Ranked Claims

Claim 1application impactsupports2025Source 11needs review

Channelrhodopsins from green algae enabled precise light-controlled manipulation of neuronal activity and are described as having revolutionized neuroscience.

Channelrhodopsins from green algae, for example, have revolutionized neuroscience by enabling precise, light-controlled manipulation of neuronal activity.
Claim 2application impactsupports2025Source 11needs review

Channelrhodopsins from green algae have revolutionized neuroscience by enabling precise, light-controlled manipulation of neuronal activity.

Claim 3application summarysupports2025Source 8needs review

Optogenetic techniques have been applied to partially restore vision in blind patients and are being explored for neurological, psychiatric, cardiac, and immunological disorders.

Claim 4capability summarysupports2025Source 8needs review

Microbial channelrhodopsins allow precise manipulation of neuronal and cardiac activities.

Claim 5mechanism summarysupports2025Source 8needs review

Vertebrate rhodopsins can modulate ion channels through GPCR pathways.

Claim 6review summarysupports2025Source 8needs review

Optogenetics provides precise spatiotemporal control, minimal invasiveness, and tunable reversibility for controlling protein activity and cellular processes.

Claim 7scope summarysupports2025Source 8needs review

The review covers genetically encoded light-sensitive ion channel actuators and modulators with diverse ion selectivity and spectral sensitivity.

Claim 8applicationsupports2022Source 4needs review

Animals expressing channelrhodopsin in specific neuronal populations have been used to map neural circuitry and examine post junctional neural effects on GI motility.

Claim 9applicationsupports2022Source 4needs review

GCaMP-expressing animals have been used to characterize Ca2+ signalling behaviours of distinct classes of interstitial cells of Cajal and smooth muscle cells throughout the GI musculature.

Claim 10enables measurementsupports2022Source 4needs review

Mice expressing GCaMP or RCaMP allow cell-specific visualization of Ca2+ signalling behaviours in the gastrointestinal tract.

Claim 11enables perturbationsupports2022Source 4needs review

Mice expressing channelrhodopsins or halorhodopsins allow light-based manipulation of specific signalling pathways.

Claim 12tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 13tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 14tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 15tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 16tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 17tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 18tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 19tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 20tool combination functionsupports2022Source 5needs review

Rhodopsin cyclases can be combined with cyclic nucleotide-gated channels in two-component optogenetics for depolarization or hyperpolarization of membrane potential.

We further show how they can be combined with cyclic nucleotide-gated channels in two-component optogenetics, for depolarization or hyperpolarization of membrane potential.
Claim 21tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 22tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 23tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 24tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 25tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 26tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 27tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 28tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 29tool functionsupports2022Source 5needs review

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.
Claim 30tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 31tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 32tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 33tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 34tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 35tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 36tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 37tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 38tool functionsupports2022Source 5needs review

Rhodopsin guanylyl cyclases and mutated variants with cyclic AMP specificity can regulate intracellular cGMP and cAMP levels.

Last, we report on a new addition to the optogenetic toolbox, which is rhodopsin guanylyl cyclases, as well as mutated variants with specificity for cyclic AMP. These can be used to regulate intracellular levels of cGMP and cAMP, which are important second messengers in sensory and other neurons.
Claim 39review scope statementsupports2018Source 7needs review

The review covers engineering and applications of upconversion optogenetic systems that incorporate multiple emissive UCNPs into various light-gated channelrhodopsin or ligand systems, and discusses technical improvements for more precise and efficient membrane-channel control.

Claim 40review summarysupports2018Source 7needs review

Established optogenetic tools such as channelrhodopsins are mainly stimulated by UV or visible light, which raises concerns about photodamage, limited tissue penetration, and invasive optical fiber implantation.

Claim 41application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 42application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 43application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 44application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 45application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 46application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 47application scopesupports2017Source 9needs review

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.
Claim 48capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 49capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 50capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 51capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 52capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 53capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 54capability summarysupports2017Source 9needs review

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.
Claim 55capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 56capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 57capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 58capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 59capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 60capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 61capability summarysupports2017Source 9needs review

Engineered G protein-coupled receptors activated by otherwise inert drug-like small molecules provide a chemogenetic or pharmacogenetic approach for selective remote control of neuronal activity.

Recent advance in genetics has also allowed development of novel pharmacological tools to selectively and remotely control neuronal activity using engineered G protein-coupled receptors, which can be activated by otherwise inert drug-like small molecules such as the designer receptors exclusively activated by designer drug, a form of chemogenetics.
Claim 62field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 63field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 64field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 65field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 66field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 67field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 68field level assessmentsupports2017Source 9needs review

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.
Claim 69mechanistic model summarysupports2015Source 3needs review

High-resolution structural data and molecular dynamics calculations support models that explain channelrhodopsin activation and ion conductance through chromophore isomerization, structural changes, proton transfer reactions, and water rearrangement across timescales from femtoseconds to minutes.

With significant support from a high-resolution 3D structure and from molecular dynamics calculations, scientists are now able to develop models that conclusively explain ChR activation and ion conductance on the basis of chromophore isomerization, structural changes, proton transfer reactions, and water rearrangement on timescales ranging from femtoseconds to minutes.
Claim 70tool role summarysupports2015Source 3needs review

Channelrhodopsins are versatile neuroscience tools for light-induced activation of selected cells or cell types with high temporal and spatial precision.

In neuroscience, ChRs constitute the most versatile tools for the light-induced activation of selected cells or cell types with unprecedented precision in time and space.
Claim 71variant landscape summarysupports2015Source 3needs review

Many channelrhodopsin variants have been discovered or engineered.

In recent years, many ChR variants have been discovered or engineered
Claim 72application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 73application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 74application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 75application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 76application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 77application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 78application scopesupports2014Source 10needs review

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis
Claim 79mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 80mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 81mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 82mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 83mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 84mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 85mechanistic interpretationsupports2014Source 10needs review

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells
Claim 86off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 87off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 88off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 89off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 90off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 91off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 92off target or context dependencesupports2014Source 10needs review

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark
phenotype induction in dark controls majority of reagents
Claim 93phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 94phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 95phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 96phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 97phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 98phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 99phenotypic effectsupports2014Source 10needs review

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes
percentage of light-exposed tadpoles showing relevant phenotypes majority of reagents
Claim 100usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 101usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 102usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 103usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 104usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 105usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 106usage guidancesupports2014Source 10needs review

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems
Claim 107mechanismsupports2012Source 6needs review

OptoXRs are rhodopsin-GPCR chimeras for controlling intracellular signaling cascades.

Claim 108tool in scopesupports2012Source 6needs review

Channelrhodopsins, halorhodopsins, bacteriorhodopsins, and OptoXRs are explicitly named tool classes associated with the paper's scope.

Claim 109comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 110comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 111comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 112comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 113comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 114comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 115comparative review scopesupports2010Source 2needs review

The review compares channelrhodopsin variants using seven key properties that influence their effectiveness as research tools: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response, and membrane trafficking.

In this review, the seven following key properties of ChRs that have significant influences on their effectiveness as research tools are examined: conductance, selectivity, kinetics, desensitization, light sensitivity, spectral response and membrane trafficking.
Claim 116engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 117engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 118engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 119engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 120engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 121engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 122engineering summarysupports2010Source 2needs review

Chimeragenesis, mutagenesis, and bioinformatic approaches have introduced additional channelrhodopsin variants including ChR2/H134R, ChETA, VChR1, VChR2, ChR2/C128X/D156A, ChD, ChEF, and I170V.

Subsequent chimeragenesis, mutagenesis and bioinformatic approaches have introduced additional ChR variants, such as channelrhodopsin-2 with H134R mutation (ChR2/H134R), channelrhodopsin-2 with E123T mutation (ChETA), Volvox carteri channelrhodopsin-1 (VChR1), Volvox carteri channelrhodopsin-2 (VChR2), channelrhodopsin-2 with C128 or D156A mutations (ChR2/C128X/D156A), chimera D (ChD), chimera EF (ChEF) and chimera EF with I170V mutation (I170V).
Claim 123functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 124functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 125functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 126functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 127functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 128functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 129functional rolesupports2010Source 2needs review

Channelrhodopsins are light-activated channels from algae that function as fast sensors to visible light for phototaxis.

Channelrhodopsins (ChRs) are light-activated channels from algae that provide these organisms with fast sensors to visible light for phototaxis.
Claim 130mechanismsupports2010Source 1needs review

Optogenetics as described here is based on channelrhodopsins that are genetically integrated into neuronal membranes and activated by brief light pulses delivered through an optical fibre.

This technique is based on a group of light-sensitive ion channels called channelrhodopsins that can be integrated by genetic engineering into the neuronal cell membrane. By a laser-diode-coupled optical fibre targeting a specific neuronal population of interest, a brief light pulse can then activate those neurones.
Claim 131review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 132review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 133review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 134review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 135review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 136review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 137review conclusion scopesupports2010Source 2needs review

The review summarizes valuable qualities and deficits of each channelrhodopsin variant and discusses optimal uses and potential future improvements of channelrhodopsins as optogenetic tools.

Using this information, valuable qualities and deficits of each ChR variant are summarized. Optimal uses and potential future improvements of ChRs as optogenetic tools are also discussed.
Claim 138tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 139tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 140tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 141tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 142tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 143tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 144tool usesupports2010Source 2needs review

Channelrhodopsin-2 has been used as a research tool to depolarize membranes of excitable cells with light.

Since its discovery, channelrhodopsin-2 (ChR2) has been used as a research tool to depolarize membranes of excitable cells with light.
Claim 145applicationsupports2009Source 12needs review

Activation of light sensitive channels was used in the authors' recent work to restore respiratory function after experimental spinal cord injury.

we briefly review the history of various attempts to restore breathing after C2 hemisection, and focus on our recent work using the activation of light sensitive channels to restore respiratory function after experimental SCI.
Claim 146mechanistic usesupports2009Source 12needs review

Light-induced activity can be used to investigate the central nervous system respiratory circuitry that controls diaphragmatic function.

We also discuss how such light-induced activity can help shed light on the inner workings of the central nervous system respiratory circuitry that controls diaphragmatic function.
Claim 147therapeutic relevancesupports2009Source 12needs review

Expression of channelrhodopsins is presented as a therapeutically relevant alternative approach for restoring respiratory function after spinal cord injury.

With the emergence of new and powerful tools from molecular neuroscience, new therapeutically relevant alternatives to these approaches have become available, including expression of light sensitive proteins called channelrhodopsins.

Approval Evidence

12 sources27 linked approval claimsfirst-pass slugs channelrhodopsins, microbial-channelrhodopsins
Microbial channelrhodopsins (ChRs) allow precise manipulation of neuronal and cardiac activities

Source:

Channelrhodopsins from green algae, for example, have revolutionized neuroscience by enabling precise, light-controlled manipulation of neuronal activity.

Source:

Availability of mice expressing optogenetic modulators (channelrhodopsins or halorhodospins) has allowed manipulation of specific signalling pathways using light. Animals that express channelrhodopsin in specific neuronal populations have been used to map neural circuitry and to examine post junctional neural effects on GI motility.

Source:

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.

Source:

Most of the established optogenetic tools (e.g., channelrhodopsins, ChRs) for optical manipulations, are mainly stimulated by UV or visible light.

Source:

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity

Source:

In neuroscience, ChRs constitute the most versatile tools for the light-induced activation of selected cells or cell types with unprecedented precision in time and space.

Source:

We injected mRNA for various proteins, including Channelrhodopsins and Archaerhodopsin, into 1-8 cell embryos

Source:

Explicitly supported tool/component names in the discovered sources include channelrhodopsins (ChRs).

Source:

This technique is based on a group of light-sensitive ion channels called channelrhodopsins that can be integrated by genetic engineering into the neuronal cell membrane.

Source:

Channelrhodopsins (ChRs) are light-activated channels from algae

Source:

With the emergence of new and powerful tools from molecular neuroscience, new therapeutically relevant alternatives to these approaches have become available, including expression of light sensitive proteins called channelrhodopsins. In this article we briefly review the history of various attempts to restore breathing after C2 hemisection, and focus on our recent work using the activation of light sensitive channels to restore respiratory function after experimental SCI.

Source:

application impactsupports

Channelrhodopsins from green algae enabled precise light-controlled manipulation of neuronal activity and are described as having revolutionized neuroscience.

Channelrhodopsins from green algae, for example, have revolutionized neuroscience by enabling precise, light-controlled manipulation of neuronal activity.

Source:

application impactsupports

Channelrhodopsins from green algae have revolutionized neuroscience by enabling precise, light-controlled manipulation of neuronal activity.

Source:

capability summarysupports

Microbial channelrhodopsins allow precise manipulation of neuronal and cardiac activities.

Source:

applicationsupports

Animals expressing channelrhodopsin in specific neuronal populations have been used to map neural circuitry and examine post junctional neural effects on GI motility.

Source:

enables perturbationsupports

Mice expressing channelrhodopsins or halorhodopsins allow light-based manipulation of specific signalling pathways.

Source:

tool functionsupports

Channelrhodopsins and their variants conduct cations or anions and are used for depolarization and hyperpolarization of membrane potential.

We address channelrhodopsins and variants thereof, which conduct cations or anions, for depolarization and hyperpolarization of the membrane potential.

Source:

review scope statementsupports

The review covers engineering and applications of upconversion optogenetic systems that incorporate multiple emissive UCNPs into various light-gated channelrhodopsin or ligand systems, and discusses technical improvements for more precise and efficient membrane-channel control.

Source:

review summarysupports

Established optogenetic tools such as channelrhodopsins are mainly stimulated by UV or visible light, which raises concerns about photodamage, limited tissue penetration, and invasive optical fiber implantation.

Source:

application scopesupports

These optogenetic and chemogenetic toolboxes have enabled advances in deciphering nervous system function and its influence on physiological processes in health and disease.

These novel toolboxes are enabling significant advances in deciphering how the nervous system works and its influence on various physiological processes in health and disease.

Source:

capability summarysupports

Bioengineered light-sensitive ion channels including channelrhodopsins, halorhodopsin, and archaerhodopsins enable light-based artificial modulation of neuronal activity in optogenetics.

Identification and subsequent bioengineering of light-sensitive ion channels (e.g., channelrhodopsins, halorhodopsin, and archaerhodopsins) from the bacteria have made it possible to use light to artificially modulate neuronal activity, namely optogenetics.

Source:

field level assessmentsupports

Optogenetics and pharmacogenetics allow selective and bidirectional modulation of defined neuronal populations with unprecedented specificity.

The cutting-edge optogenetics and pharmacogenetics are powerful tools in neuroscience that allow selective and bidirectional modulation of the activity of defined populations of neurons with unprecedented specificity.

Source:

mechanistic model summarysupports

High-resolution structural data and molecular dynamics calculations support models that explain channelrhodopsin activation and ion conductance through chromophore isomerization, structural changes, proton transfer reactions, and water rearrangement across timescales from femtoseconds to minutes.

With significant support from a high-resolution 3D structure and from molecular dynamics calculations, scientists are now able to develop models that conclusively explain ChR activation and ion conductance on the basis of chromophore isomerization, structural changes, proton transfer reactions, and water rearrangement on timescales ranging from femtoseconds to minutes.

Source:

tool role summarysupports

Channelrhodopsins are versatile neuroscience tools for light-induced activation of selected cells or cell types with high temporal and spatial precision.

In neuroscience, ChRs constitute the most versatile tools for the light-induced activation of selected cells or cell types with unprecedented precision in time and space.

Source:

variant landscape summarysupports

Many channelrhodopsin variants have been discovered or engineered.

In recent years, many ChR variants have been discovered or engineered

Source:

application scopesupports

Optogenetic reagents including proteins and photochemical switches were used to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis.

we used optogenetic reagents, both proteins and photochemical switches, to vary steady-state bioelectrical properties of non-spiking embryonic cells in Xenopus laevis

Source:

mechanistic interpretationsupports

Experiments on the dark phenotype yielded evidence that ion flux direction via common optogenetic reagents may be reversed or unpredictable in non-neural cells.

Experiments on this "dark phenotype" yielded evidence that the direction of ion flux via common optogenetic reagents may be reversed, or unpredictable in non-neural cells

Source:

off target or context dependencesupports

The majority of tested reagents also induced phenotypes in dark-kept controls.

however, the majority of reagents also induced phenotypes in controls kept in the dark

Source:

phenotypic effectsupports

The majority of tested reagents caused a significant increase in the percentage of light-exposed tadpoles showing phenotypes associated with altered membrane voltage.

The majority of reagents we tested caused a significant increase in the percentage of light-exposed tadpoles showing relevant phenotypes

Source:

usage guidancesupports

When used with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems.

When used in combination with rigorous controls, optogenetics can be a powerful tool for investigating ion-flux based signaling in non-excitable systems

Source:

tool in scopesupports

Channelrhodopsins, halorhodopsins, bacteriorhodopsins, and OptoXRs are explicitly named tool classes associated with the paper's scope.

Source:

Comparisons

Source-backed strengths

A key strength is bidirectional control at the level of membrane potential through distinct channelrhodopsin variants that conduct cations or anions. The evidence also supports practical use in optogenetic modulation of neuronal activity and reports expression by mRNA injection in 1–8 cell embryos.

Source:

supports depolarization or hyperpolarization through cation- or anion-conducting variants

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    StructuralSource 1Addiction2010Claim 130

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  3. 3.
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  8. 8.
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  9. 9.
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  11. 11.
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  12. 12.
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    Extracted from this source document.