2efe

From Proteopedia

(Difference between revisions)

Revision as of 04:41, 25 December 2014

Ara7-GDPNH2/AtVps9a

Structural highlights

2efe is a 4 chain structure with sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	2fec, 2efd, 2efh
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[Q9LT31_ARATH] Functions as guanine nucleotide exchange factor (GEF) for Rab small GTPases. Activates specifically RABF1, RABF2A and RABF2B proteins. Required for early stages of embryogenesis, cytokinesis, embryogenesis, and organ development. Is essential for the establishment or maintenance of the polar localization of the auxin efflux carrier PIN1.^[1] ^[2] [Q9SN68_ARATH] Endosomal protein that may be involved in endocytosis.^[3]

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

Many GTPases regulate intracellular transport and signaling in eukaryotes. Guanine nucleotide exchange factors (GEFs) activate GTPases by catalyzing the exchange of their GDP for GTP. Here we present crystallographic and biochemical studies of a GEF reaction with four crystal structures of Arabidopsis thaliana ARA7, a plant homolog of Rab5 GTPase, in complex with its GEF, VPS9a, in the nucleotide-free and GDP-bound forms, as well as a complex with aminophosphonic acid-guanylate ester and ARA7.VPS9a(D185N) with GDP. Upon complex formation with ARA7, VPS9 wedges into the interswitch region of ARA7, inhibiting the coordination of Mg(2+) and decreasing the stability of GDP binding. The aspartate finger of VPS9a recognizes GDP beta-phosphate directly and pulls the P-loop lysine of ARA7 away from GDP beta-phosphate toward switch II to further destabilize GDP for its release during the transition from the GDP-bound to nucleotide-free intermediates in the nucleotide exchange reaction.

GDP-bound and nucleotide-free intermediates of the guanine nucleotide exchange in the Rab5.Vps9 system.,Uejima T, Ihara K, Goh T, Ito E, Sunada M, Ueda T, Nakano A, Wakatsuki S J Biol Chem. 2010 Nov 19;285(47):36689-97. Epub 2010 Sep 10. PMID:20833725^[4]

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

References

↑ Goh T, Uchida W, Arakawa S, Ito E, Dainobu T, Ebine K, Takeuchi M, Sato K, Ueda T, Nakano A. VPS9a, the common activator for two distinct types of Rab5 GTPases, is essential for the development of Arabidopsis thaliana. Plant Cell. 2007 Nov;19(11):3504-15. Epub 2007 Nov 30. PMID:18055610 doi:10.1105/tpc.107.053876
↑ Uejima T, Ihara K, Goh T, Ito E, Sunada M, Ueda T, Nakano A, Wakatsuki S. GDP-bound and nucleotide-free intermediates of the guanine nucleotide exchange in the Rab5.Vps9 system. J Biol Chem. 2010 Nov 19;285(47):36689-97. Epub 2010 Sep 10. PMID:20833725 doi:10.1074/jbc.M110.152132
↑ Uejima T, Ihara K, Goh T, Ito E, Sunada M, Ueda T, Nakano A, Wakatsuki S. GDP-bound and nucleotide-free intermediates of the guanine nucleotide exchange in the Rab5.Vps9 system. J Biol Chem. 2010 Nov 19;285(47):36689-97. Epub 2010 Sep 10. PMID:20833725 doi:10.1074/jbc.M110.152132
↑ Uejima T, Ihara K, Goh T, Ito E, Sunada M, Ueda T, Nakano A, Wakatsuki S. GDP-bound and nucleotide-free intermediates of the guanine nucleotide exchange in the Rab5.Vps9 system. J Biol Chem. 2010 Nov 19;285(47):36689-97. Epub 2010 Sep 10. PMID:20833725 doi:10.1074/jbc.M110.152132

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/2efe"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2efe]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2EFE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2EFE FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GNH:AMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNH</scene><br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GNH:AMINOPHOSPHONIC+ACID-GUANYLATE+ESTER'>GNH</scene></td></tr>
-<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fec|2fec]], [[2efd|2efd]], [[2efh|2efh]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fec|2fec]], [[2efd|2efd]], [[2efh|2efh]]</td></tr>
-<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2efe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2efe OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2efe RCSB], [http://www.ebi.ac.uk/pdbsum/2efe 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=2efe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2efe OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2efe RCSB], [http://www.ebi.ac.uk/pdbsum/2efe PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/Q9LT31_ARATH Q9LT31_ARATH]] Functions as guanine nucleotide exchange factor (GEF) for Rab small GTPases. Activates specifically RABF1, RABF2A and RABF2B proteins. Required for early stages of embryogenesis, cytokinesis, embryogenesis, and organ development. Is essential for the establishment or maintenance of the polar localization of the auxin efflux carrier PIN1.<ref>PMID:18055610</ref> <ref>PMID:20833725</ref>  [[http://www.uniprot.org/uniprot/Q9SN68_ARATH Q9SN68_ARATH]] Endosomal protein that may be involved in endocytosis.<ref>PMID:20833725</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 30: / Line 32: @@
 </StructureSection>
 [[Category: Arabidopsis thaliana]]
-[[Category: Ihara, K.]]
+[[Category: Ihara, K]]
-[[Category: Uejima, T.]]
+[[Category: Uejima, T]]
-[[Category: Wakatsuki, S.]]
+[[Category: Wakatsuki, S]]
 [[Category: Gef]]
 [[Category: Gtpase]]

2efe

From Proteopedia

Revision as of 04:41, 25 December 2014

Ara7-GDPNH2/AtVps9a

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox