Structural Basis of Membrane Targeting by the Dock180 Family of Rho Family Guanine Exchange Factors (Rho-GEFs)
Open accessAbstract
The Dock180 family of atypical Rho family guanine nucleotide exchange factors (Rho-GEFs) regulate a variety of processes involving cellular or subcellular polarization, including cell migration and phagocytosis. Each contains a Dock homology region-1 (DHR-1) domain that is required to localize its GEF activity to a specific membrane compartment where levels of phosphatidylinositol (3,4,5)-trisphosphate (PtdIns(3,4,5)P(3)) are up-regulated by the local activity of PtdIns 3-kinase. Here we define the structural and energetic bases of phosphoinositide specificity by the DHR-1 domain of Dock1 (a GEF for Rac1), and show that DHR-1 utilizes a C2 domain scaffold and surface loops to create a basic pocket on its upper surface for recognition of the PtdIns(3,4,5)P(3) head group. The pocket has many of the characteristics of those observed in pleckstrin homology domains. We show that point mutations in the pocket that abolish phospholipid binding in vitro ablate the ability of Dock1 to induce cell polarization, and propose a model that brings together recent mechanistic and structural studies to rationalize the central role of DHR-1 in dynamic membrane targeting of the Rho-GEF activity of Dock180.
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The DHR1 domain is a C2-like domain that binds phospholipids to target DOCK complexes to the membrane.
“The DHR1 domain is a C2-like domain that binds phospholipids to target DOCK complexes to the membrane, such as at a leading cellular edge where signaling can be initiated to drive motility (32).”
From RHO to the DOCK for GDP disembarking: Structural insights into the DOCK GTPase nucleotide exchange factors (2021) · cites this paper as [32]
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Cites
Unconventional Rac-GEF activity is mediated through the Dock180–ELMO complex
Brugnera, E., Haney, L., Grimsley, C., Lu, M., Walk, S. F., Tosello-Trampont, A.-C., Macara, I. G., Madhani, H., Fink, G. R., & Ravichandran, K. S. (2002) · Nature Cell Biology · doi:10.1038/ncb824 · Cited by 576 · see citing works
Haematopoietic cell-specific CDM family protein DOCK2 is essential for lymphocyte migration
Fukui, Y., Hashimoto, O., Sanui, T., Oono, T., Koga, H., Abe, M., Inayoshi, A., Noda, M., Oike, M., Shirai, T., et al. (2001) · Nature · doi:10.1038/35090591 · Cited by 449 · see citing works
Zizimin1, a novel Cdc42 activator, reveals a new GEF domain for Rho proteins
Meller, N., Irani-Tehrani, M., Kiosses, W. B., Del Pozo, M. A., & Schwartz, M. A. (2002) · Nature Cell Biology · doi:10.1038/ncb835 · Cited by 171 · see citing works
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Cited by
Sorted by citations
Xiao, Y., Peng, Y., Wan, J., Tang, G., Chen, Y., Tang, J., Ye, W.-C., Ip, N. Y., & Shi, L. (2013) · Journal of Biological Chemistry · doi:10.1074/jbc.m113.458612 · Cited by 71 · see citing works
Thompson, A. P., Bitsina, C., Gray, J. L., von Delft, F., & Brennan, P. E. (2021) · Journal of Biological Chemistry · doi:10.1016/j.jbc.2021.100521 · Cited by 21 · see citing works
“The DHR1 domain is a C2-like domain that binds phospholipids to target DOCK complexes to the membrane, such as at a leading cellular edge where signaling can be initiated to drive motility (32).”
Background
- Authors
- Premkumar, L., Bobkov, A. A., Patel, M., Jaroszewski, L., Bankston, L. A., Stec, B., Vuori, K., Côté, J.-F., & Liddington, R. C.
- Affiliations
- Sanford Burnham Prebys Medical Discovery Institute (US)
- Montreal Clinical Research Institute (CA)
- Corresponding author
- Liddington, Robert C.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2010-04
- Volume
- 285
- Issue
- 17
- Pages
- 13211-13222
- ISSN
- 0021-9258 (ISSN-L)
- PMC
- PMC2857062
- OpenAlex
- W2054082789
- Cited by
- 68
- References
- 3
- Citations by year
- 2026: 4 · 2025: 1 · 2024: 3 · 2023: 5 · 2022: 5 · 2021: 8 · 2020: 3 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 5 · 2015: 2 · 2014: 5 · 2013: 6 · 2012: 5
- FWCI
- 2.48
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Biological Chemistry (publishedVersion, cc-by)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- U.S. Department of Energy
- National Institutes of Health (5u54gm064346-10)
- Canadian Institutes of Health Research (77591)
- National Institute of General Medical Sciences (U54-GM064346, U54 GM06346)
- Basic Energy Sciences
- 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
- DOCK180, DOCK1, RhoGEF, membrane targeting, phosphatidylinositol 3,4,5-trisphosphate, C2 domain, pleckstrin homology domain, cell polarization, Rac1, protein structure
- MeSH terms
- Animals, Binding Sites, Cytoskeletal Proteins, Drosophila melanogaster, Multigene Family, Humans, Models, Molecular, Structure-Activity Relationship, Protein Structure, Secondary, Protein Structure, Tertiary, Phosphatidylinositol Phosphates, Phosphatidylinositol 3-Kinases, rho GTP-Binding Proteins, rac GTP-Binding Proteins, Drosophila Proteins, Structural Homology, Protein
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