Source 1review2018International Journal of Molecular Sciences
Toolkit/RAS GTPases
RAS GTPases
Also known as: RAS
Taxonomy: Mechanism Branch / Component. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
RAS GTPases are small signaling proteins that function as GTP-dependent molecular switches, with activation into the GTP-bound ON state described as a key regulator of brain functions. The supplied evidence discusses endogenous neuronal H-RAS signaling and does not describe a specific engineered light-responsive or optogenetic RAS tool.
Usefulness & Problems
Why this is useful
The evidence suggests that neuronal H-RAS activity may be beneficial in cellular and animal models of neurodegenerative disease, indicating relevance for studying brain signaling and neuronal function. However, the supplied material does not provide tool-specific performance data or demonstrate a deployable protein-domain technology for experimental control.
Source:
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
Source:
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
Problem solved
RAS GTPases address the biological problem of switching intracellular signaling states through GTP-dependent activation. In the provided evidence, this is framed in the context of regulating brain functions and potentially supporting neurodegenerative disease models, but not as a defined engineered intervention platform.
Source:
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
Taxonomy & Function
Primary hierarchy
Mechanism Branch
Component: A low-level protein part used inside a larger architecture that realizes a mechanism.
Mechanisms
gtp-dependent molecular switchingTechniques
Structural CharacterizationTarget processes
localizationsignalingInput: Light
Implementation Constraints
The evidence establishes that RAS GTPases operate through a GTP-bound ON state, implying dependence on nucleotide loading for activity. No construct architecture, cofactor requirements, delivery strategy, host system, or optical stimulation parameters are described in the supplied material.
The supplied evidence is limited to a review-level statement about endogenous RAS/H-RAS function and does not identify a specific construct, domain design, or light-controlled implementation. No data are provided on kinetics, dynamic range, wavelength dependence, expression context, or reproducibility as a biological tool.
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Supporting Sources
Ranked Claims
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review states that neuronal H-RAS activity is suggested to play a beneficial role in cellular and animal models of neurodegenerative diseases.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review presents magnetic guidance of re-growing axons as a complementary approach to optogenetic manipulation for deep brain applications.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
The review states that optogenetic manipulation of cellular signaling in deep brain regions is limited by the need for light penetration through absorbing tissue over large distances.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
Approval Evidence
1 source3 linked approval claimsfirst-pass slug ras-gtpases
Cellular activation of RAS GTPases into the GTP-binding "ON" state is a key switch for regulating brain functions.
Source:
functional role summarysupports
The review describes RAS and RHEB GTPase structural elements and membrane localization as linked to signaling pathways that regulate synaptic connectivity, axonal growth, differentiation, migration, cytoskeletal dynamics, neural protection, and apoptosis in brain neurons.
Source:
spatiotemporal control summarysupports
The review states that recent optogenetic regulation experiments provide insights into spatiotemporal control of RAS/MAPK and PI3K pathways.
Source:
therapeutic concept summarysupports
The review discusses grafting dopaminergic precursor neurons into the degenerating substantia nigra as a novel concept to guide axonal growth by activating GTPase signaling with protein-functionalized intracellular magnetic nanoparticles responsive to external magnets.
Source:
Comparisons
Source-backed strengths
A key strength supported by the evidence is that RAS activation represents a central molecular switch in brain biology. The review also summarizes beneficial associations of neuronal H-RAS activity in cellular and animal neurodegeneration models, but no quantitative benchmarking or tool validation is provided.
Ranked Citations
- 1.