The Structure of the RLIP76 RhoGAP-Ral Binding Domain Dyad: Fixed Position of the Domains Leads to Dual Engagement of Small G Proteins at the Membrane
Open accessAbstract
RLIP76 is an effector for Ral small GTPases, which in turn lie downstream of the master regulator Ras. Evidence is growing that Ral and RLIP76 play a role in tumorigenesis, invasion, and metastasis. RLIP76 contains both a RhoGAP domain and a Ral binding domain (GBD) and is, therefore, a node between Ras and Rho family signaling. The structure of the RhoGAP-GBD dyad reveals that the RLIP76 RhoGAP domain adopts a canonical RhoGAP domain structure and that the linker between the two RLIP76 domains is structured, fixing the orientation of the two domains and allowing RLIP76 to interact with Rho-family GTPases and Ral simultaneously. However, the juxtaposed domains do not influence each other functionally, suggesting that the RLIP76-Ral interaction controls cellular localization and that the fixed orientation of the two domains orientates the RhoGAP domain with respect to the membrane, allowing it to be perfectly poised to engage its target G proteins.
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Ralbp1 has a putative RhoGAP domain, although its catalytic activity is very low.
“In addition, Ralbp1 has a putative RhoGAP domain, although its catalytic activity is very low (48, 49).”
From Regulation of cargo exocytosis by a Reps1-Ralbp1-RalA module (2023) · cites this paper as [49]
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Regulation of cargo exocytosis by a Reps1-Ralbp1-RalA module
Wang, S., Chen, X., Crisman, L., Dou, X., Winborn, C. S., Wan, C., Puscher, H., Yin, Q., Kennedy, M. J., & Shen, J. (2023) · Science Advances · doi:10.1126/sciadv.ade2540 · Cited by 14 · see citing works
- Authors
- Rajasekar, K. V., Campbell, L. J., Nietlispach, D., Owen, D., & Mott, H. R.
- Affiliations
- University of Cambridge (GB)
- Corresponding author
- Owen, Darerca
- Mott, Helen R.
- Venue
- Structure
- Publisher
- Elsevier BV
- Published
- 2013-12
- Volume
- 21
- Issue
- 12
- Pages
- 2131-2142
- ISSN
- 0969-2126 (ISSN-L)
- PMC
- PMC3852207
- OpenAlex
- W2026557548
- Cited by
- 11
- References
- 0
- Citations by year
- 2026: 1 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 2 · 2018: 1 · 2017: 2 · 2016: 1 · 2014: 1
- FWCI
- 0.25
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Structure (publishedVersion, cc-by-nc-nd)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Funders
- Wellcome Trust
- Medical Research Council (MR/J007803/1)
- Biotechnology and Biological Sciences Research Council (BB/E013228/1)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
- Keywords
- RLIP76, Ras signaling, Rho GTPases, membrane targeting, tumor invasion and metastasis, protein structure
- MeSH terms
- Amino Acid Sequence, Cell Membrane, Humans, Models, Molecular, Molecular Sequence Data, Protein Binding, Protein Structure, Tertiary, ATP-Binding Cassette Transporters, ras Proteins, GTP-Binding Proteins, GTPase-Activating Proteins, ral GTP-Binding Proteins, cdc42 GTP-Binding Protein, rac1 GTP-Binding Protein
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