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Updated: May 11, 2026
10:27
Spatio-Temporal Manipulation of Small GTPase Activity at Subcellular Level and on Timescale of Seconds in Living Cells
Published on: March 9, 2012
Mechanistic insights on spatiotemporal control of Ras-signaling
Clotilde Charrier1, Sascha Mrachacz1, Sabrina Schulze1
1Department of Synthetic and Structural Biochemistry, 425811 Institute of Biochemistry, University of Greifswald , Felix-Hausdorff-Str. 4, D-17489 Greifswald, Germany.
Biological Chemistry
|May 9, 2026
Summary
Ras proteins are key regulators of cell processes, but their dysregulation causes diseases. Post-translational modifications (PTMs) fine-tune Ras signaling, offering therapeutic potential.
Area of Science:
- Molecular Biology
- Cellular Signaling
Background:
- Ras proteins, guanine nucleotide binding proteins (GNBPs), regulate fundamental cellular processes like proliferation and transport.
- Dysregulated Ras signaling is linked to diseases including cancer, RASopathies, and neurodegenerative disorders.
- Ras proteins function as molecular switches, cycling between GTP-bound (on) and GDP-bound (off) states, requiring GEFs and GAPs for regulation.
Purpose of the Study:
- To review current knowledge on Ras signaling pathways.
- To emphasize the role of post-translational modifications (PTMs) in controlling Ras signaling.
- To highlight the therapeutic potential of targeting Ras modifications.
Main Methods:
- Literature review of Ras signaling and PTMs.
- Analysis of PTMs' impact on Ras activity, localization, and turnover.
- Exploration of PTMs in bacterial pathogenesis and therapeutic strategies.
Main Results:
- PTMs like phosphorylation, acetylation, lipidation, and ubiquitination dynamically regulate Ras signaling.
- PTMs are crucial for cellular signaling cascades and pattern formation.
- Bacterial pathogens exploit Ras PTMs for infection; modifications are therapeutically relevant for oncogenic Ras variants.
Conclusions:
- PTMs act as dynamic signaling hubs for precise spatiotemporal control of Ras pathways.
- Understanding Ras PTMs is essential for deciphering cellular processes and disease mechanisms.
- Targeting Ras modifications presents a promising therapeutic avenue for various diseases.
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