7syf

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== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[7syf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7SYF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7SYF FirstGlance]. <br>
<table><tr><td colspan='2'>[[7syf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7SYF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7SYF FirstGlance]. <br>
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</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7syf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7syf OCA], [https://pdbe.org/7syf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7syf RCSB], [https://www.ebi.ac.uk/pdbsum/7syf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7syf ProSAT]</span></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 4.2&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7syf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7syf OCA], [https://pdbe.org/7syf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7syf RCSB], [https://www.ebi.ac.uk/pdbsum/7syf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7syf ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
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[[https://www.uniprot.org/uniprot/D9IEF7_BPT4 D9IEF7_BPT4]] [[https://www.uniprot.org/uniprot/PREX1_HUMAN PREX1_HUMAN]] Functions as a RAC guanine nucleotide exchange factor (GEF), which activates the Rac proteins by exchanging bound GDP for free GTP. Its activity is synergistically activated by phosphatidylinositol 3,4,5-trisphosphate and the beta gamma subunits of heterotrimeric G protein. May function downstream of heterotrimeric G proteins in neutrophils.
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[https://www.uniprot.org/uniprot/D9IEF7_BPT4 D9IEF7_BPT4] [https://www.uniprot.org/uniprot/PREX1_HUMAN PREX1_HUMAN] Functions as a RAC guanine nucleotide exchange factor (GEF), which activates the Rac proteins by exchanging bound GDP for free GTP. Its activity is synergistically activated by phosphatidylinositol 3,4,5-trisphosphate and the beta gamma subunits of heterotrimeric G protein. May function downstream of heterotrimeric G proteins in neutrophils.
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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P-Rex (PI(3,4,5)P3-dependent Rac exchanger) guanine nucleotide exchange factors potently activate Rho GTPases. P-Rex guanine nucleotide exchange factors are autoinhibited, synergistically activated by Gbetagamma and PI(3,4,5)P3 binding and dysregulated in cancer. Here, we use X-ray crystallography, cryogenic electron microscopy and crosslinking mass spectrometry to determine the structural basis of human P-Rex1 autoinhibition. P-Rex1 has a bipartite structure of N- and C-terminal modules connected by a C-terminal four-helix bundle that binds the N-terminal Pleckstrin homology (PH) domain. In the N-terminal module, the Dbl homology (DH) domain catalytic surface is occluded by the compact arrangement of the DH-PH-DEP1 domains. Structural analysis reveals a remarkable conformational transition to release autoinhibition, requiring a 126 degrees opening of the DH domain hinge helix. The off-axis position of Gbetagamma and PI(3,4,5)P3 binding sites further suggests a counter-rotation of the P-Rex1 halves by 90 degrees facilitates PH domain uncoupling from the four-helix bundle, releasing the autoinhibited DH domain to drive Rho GTPase signaling.
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Structure of the metastatic factor P-Rex1 reveals a two-layered autoinhibitory mechanism.,Chang YG, Lupton CJ, Bayly-Jones C, Keen AC, D'Andrea L, Lucato CM, Steele JR, Venugopal H, Schittenhelm RB, Whisstock JC, Halls ML, Ellisdon AM Nat Struct Mol Biol. 2022 Jul 21. pii: 10.1038/s41594-022-00804-9. doi:, 10.1038/s41594-022-00804-9. PMID:35864164<ref>PMID:35864164</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 7syf" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>

Current revision

Reconstruction of full-length Prex-1 (PtdIns(3,4,5)P3-dependent Rac Exchanger 1)

PDB ID 7syf

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