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2fu5

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Revision as of 07:44, 18 October 2017

structure of Rab8 in complex with MSS4

Structural highlights

2fu5 is a 4 chain structure with sequence from Human and Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	RABIF, MSS4, RASGRF3 (HUMAN), Rab8a, Mel, Rab8 (LK3 transgenic mice)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[MSS4_HUMAN] Guanine-nucleotide-releasing protein that acts on members of the SEC4/YPT1/RAB subfamily. Stimulates GDP release from both YPT1 and RAB3A, but is less active on these proteins than on the SEC4 protein. Might play a general role in vesicular transport. [RAB8A_MOUSE] May be involved in vesicular trafficking and neurotransmitter release. Together with RAB11A, RAB3IP, the exocyst complex, PARD3, PRKCI, ANXA2, CDC42 and DNMBP promotes transcytosis of PODXL to the apical membrane initiation sites (AMIS), apical surface formation and lumenogenesis. Together with MYO5B and RAB11A participates in epithelial cell polarization (By similarity).

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Rab GTPases function as essential regulators of vesicle transport in eukaryotic cells. MSS4 was shown to stimulate nucleotide exchange on Rab proteins associated with the exocytic pathway and to have nucleotide-free-Rab chaperone activity. A detailed kinetic analysis of MSS4 interaction with Rab8 showed that MSS4 is a relatively slow exchange factor that forms a long-lived nucleotide-free complex with RabGTPase. In contrast to other characterized exchange factor-GTPase complexes, MSS4:Rab8 complex binds GTP faster than GDP, but still ca. 3 orders of magnitude more slowly than comparable complexes. The crystal structure of the nucleotide-free MSS4:Rab8 complex revealed that MSS4 binds to the Switch I and interswitch regions of Rab8, forming an intermolecular beta-sheet. Complex formation results in dramatic structural changes of the Rab8 molecule, leading to unfolding of the nucleotide-binding site and surrounding structural elements, facilitating nucleotide release and slowing its rebinding. Coupling of nucleotide exchange activity to a cycle of GTPase unfolding and refolding represents a novel nucleotide exchange mechanism.

Nucleotide exchange via local protein unfolding--structure of Rab8 in complex with MSS4.,Itzen A, Pylypenko O, Goody RS, Alexandrov K, Rak A EMBO J. 2006 Apr 5;25(7):1445-55. Epub 2006 Mar 16. PMID:16541104^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Itzen A, Pylypenko O, Goody RS, Alexandrov K, Rak A. Nucleotide exchange via local protein unfolding--structure of Rab8 in complex with MSS4. EMBO J. 2006 Apr 5;25(7):1445-55. Epub 2006 Mar 16. PMID:16541104

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2fu5"

@@ Line 1: / Line 1: @@
 ==structure of Rab8 in complex with MSS4==
 <StructureSection load='2fu5' size='340' side='right' caption='[[2fu5]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">RABIF, MSS4, RASGRF3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN]), Rab8a, Mel, Rab8 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2fu5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2fu5 OCA], [http://pdbe.org/2fu5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2fu5 RCSB], [http://www.ebi.ac.uk/pdbsum/2fu5 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2fu5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2fu5 OCA], [http://pdbe.org/2fu5 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2fu5 RCSB], [http://www.ebi.ac.uk/pdbsum/2fu5 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2fu5 ProSAT]</span></td></tr>
 </table>
 == Function ==

2fu5

From Proteopedia

Revision as of 07:44, 18 October 2017

structure of Rab8 in complex with MSS4

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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