Source 1review2014Frontiers in Molecular Neuroscience
Toolkit/FRET-based GECI sensors
FRET-based GECI sensors
Also known as: Förster Resonance Energy Transfer-based sensors, FRET-based sensors
Taxonomy: Mechanism Branch / Architecture. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
From a variety of initial designs two have emerged as promising prototypes for further optimization: FRET (Förster Resonance Energy Transfer)-based sensors and single fluorophore sensors of the GCaMP family.
Usefulness & Problems
Why this is useful
FRET-based sensors are presented as one of the two main GECI design classes that emerged as promising prototypes. The review indicates that recent optimization efforts improved their performance.; genetically encoded calcium sensing; further optimization of calcium indicators
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FRET-based sensors are presented as one of the two main GECI design classes that emerged as promising prototypes. The review indicates that recent optimization efforts improved their performance.
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genetically encoded calcium sensing
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further optimization of calcium indicators
Problem solved
They provide a genetically encoded sensor architecture for calcium imaging. The review treats them as a viable branch for continued performance optimization.; providing one of the main prototype architectures for genetically encoded calcium indicators
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They provide a genetically encoded sensor architecture for calcium imaging. The review treats them as a viable branch for continued performance optimization.
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providing one of the main prototype architectures for genetically encoded calcium indicators
Problem links
providing one of the main prototype architectures for genetically encoded calcium indicators
LiteratureThey provide a genetically encoded sensor architecture for calcium imaging. The review treats them as a viable branch for continued performance optimization.
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They provide a genetically encoded sensor architecture for calcium imaging. The review treats them as a viable branch for continued performance optimization.
Published Workflows
Objective: Optimize genetically encoded calcium indicators to improve in vivo calcium imaging and neuronal activity readout.
Why it works: The review states that recent efforts combining structural analysis, engineering, and screening broke important performance thresholds in both major GECI classes.
calcium-dependent fluorescent sensingFRET-based signal transductionsingle-fluorophore signal transductionstructural analysisengineeringscreening
Stages
- 1.Prototype class prioritization(decision_gate)
The review narrows a variety of initial designs to two prototype classes that are worth continued optimization.
Selection: Identify initial GECI designs that emerged as promising prototypes for further optimization.
- 2.Structure-guided engineering and screening(broad_screen)
This stage is presented as the route by which recent generations crossed important performance thresholds.
Selection: Use structural analysis, engineering, and screening to improve sensor performance.
- 3.Post-threshold functional quality assessment(functional_characterization)
The review explicitly says that even after performance improvements, other aspects of sensor function deserve attention.
Selection: Evaluate additional aspects of sensor function after major performance gains.
- 4.Spectral and expression-platform expansion(secondary_characterization)
The review identifies spectral improvement and better expression resources as remaining needs for technology maturation.
Selection: Develop sensors with more favorable red or infrared emission and create stable or conditional expression lines.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Architecture: A reusable architecture pattern for arranging parts into an engineered system.
Mechanisms
förster resonance energy transferTarget processes
recombinationselectionImplementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor
The abstract supports that their improvement relied on structural analysis, engineering, and screening. As GECIs, they also require expression in living tissues or designated cell types for use.; requires continued structural analysis, engineering, and screening for optimization
The abstract does not specify that this class has fully resolved issues such as linearity, toxicity, or slow kinetics. It also does not state that it already satisfies the need for red or infrared emission.; remaining issues in sensor function still apply at the class level
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
Among initial GECI designs, FRET-based sensors and single-fluorophore GCaMP-family sensors emerged as promising prototypes for further optimization.
Recent structural analysis, engineering, and screening improved both FRET-based and GCaMP-family GECIs enough to cross important performance thresholds.
Approval Evidence
1 source2 linked approval claimsfirst-pass slug fret-based-geci-sensors
From a variety of initial designs two have emerged as promising prototypes for further optimization: FRET (Förster Resonance Energy Transfer)-based sensors and single fluorophore sensors of the GCaMP family.
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design class prioritizationsupports
Among initial GECI designs, FRET-based sensors and single-fluorophore GCaMP-family sensors emerged as promising prototypes for further optimization.
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performance trendsupports
Recent structural analysis, engineering, and screening improved both FRET-based and GCaMP-family GECIs enough to cross important performance thresholds.
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Comparisons
Source-stated alternatives
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
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The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Source-backed strengths
identified as one of two promising prototypes for further optimization; latest generations have crossed important performance thresholds
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identified as one of two promising prototypes for further optimization
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latest generations have crossed important performance thresholds
Compared with FRET
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Shared frame: source-stated alternative in extracted literature
Strengths here: identified as one of two promising prototypes for further optimization; latest generations have crossed important performance thresholds.
Relative tradeoffs: remaining issues in sensor function still apply at the class level.
Source:
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Compared with GCaMP
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Shared frame: source-stated alternative in extracted literature
Strengths here: identified as one of two promising prototypes for further optimization; latest generations have crossed important performance thresholds.
Relative tradeoffs: remaining issues in sensor function still apply at the class level.
Source:
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Compared with GCaMP calcium imaging
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Shared frame: source-stated alternative in extracted literature
Strengths here: identified as one of two promising prototypes for further optimization; latest generations have crossed important performance thresholds.
Relative tradeoffs: remaining issues in sensor function still apply at the class level.
Source:
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Compared with GCaMP-family single-fluorophore GECI sensors
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Shared frame: source-stated alternative in extracted literature
Strengths here: identified as one of two promising prototypes for further optimization; latest generations have crossed important performance thresholds.
Relative tradeoffs: remaining issues in sensor function still apply at the class level.
Source:
The abstract directly contrasts FRET-based sensors with single-fluorophore sensors of the GCaMP family.
Ranked Citations
- 1.