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Updated: Mar 3, 2026
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Spatio-Temporal Manipulation of Small GTPase Activity at Subcellular Level and on Timescale of Seconds in Living Cells
Published on: March 9, 2012
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Post translational modifications of Rab GTPases
Swapnil Rohidas Shinde1,2, Subbareddy Maddika1
1a Laboratory of Cell Death & Cell Survival , Centre for DNA Fingerprinting and Diagnostics (CDFD) , Nampally, Hyderabad , India.
Small Gtpases
|April 21, 2017
Summary
Rab GTPases are key regulators of vesicular trafficking. This review highlights how post-translational modifications (PTMs) significantly impact Rab GTPase localization, activation, and function, offering new insights into cellular regulation.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Rab GTPases are essential for intracellular vesicular trafficking, controlling vesicle formation, targeting, and fusion.
- Their spatiotemporal regulation is critical for cellular function, traditionally linked to GDI, GEF, and GAP interactions.
- Emerging evidence points to post-translational modifications (PTMs) as crucial regulatory mechanisms for Rab GTPases.
Purpose of the Study:
- To review the diverse post-translational modifications (PTMs) affecting Rab GTPases.
- To elucidate the significance of PTMs in regulating Rab GTPase localization, activation, and function.
- To consolidate current understanding of PTMs in the context of vesicular transport.
Main Methods:
- Literature review of recent studies on Rab GTPase regulation.
- Analysis of PTMs including phosphorylation, ubiquitination, SUMOylation, and others.
- Synthesis of findings on how PTMs modulate Rab GTPase activity and cellular roles.
Main Results:
- Various PTMs directly influence Rab GTPase activity and localization.
- PTMs provide an additional layer of regulation beyond GDI/GEF/GAP interactions.
- Specific PTMs have been linked to distinct cellular processes mediated by different Rabs.
Conclusions:
- Post-translational modifications are critical regulators of Rab GTPase function in vesicular trafficking.
- Understanding PTMs offers new therapeutic targets for diseases involving disrupted trafficking.
- Further research into PTMs will deepen our comprehension of Rab GTPase-mediated cellular processes.
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