3tw8: Difference between revisions

<StructureSection load='3tw8' size='340' side='right' caption='[[3tw8]], [[Resolution|resolution]] 2.10&Aring;' scene=''>

<table><tr><td colspan='2'>[[3tw8]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3TW8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3TW8 FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2fol|2fol]], [[1yzn|1yzn]]</td></tr>

<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DENND1B, C1orf218, FAM31B ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), RAB35, RAB1C, RAY ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</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=3tw8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3tw8 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3tw8 RCSB], [http://www.ebi.ac.uk/pdbsum/3tw8 PDBsum]</span></td></tr>

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== Publication Abstract from PubMed ==

Rab GTPases are key regulators of membrane traffic pathways within eukaryotic cells. They are specifically activated by guanine nucleotide exchange factors (GEFs), which convert them from their "inactive" GDP-bound form to the "active" GTP-bound form. In higher eukaryotes, proteins containing DENN-domains comprise a major GEF family. Here we describe at 2.1-A resolution the first structure of a DENN-domain protein, DENND1B-S, complexed with its substrate Rab35, providing novel insights as to how DENN-domain GEFs interact with and activate Rabs. DENND1B-S is bi-lobed, and interactions with Rab35 are through conserved surfaces in both lobes. Rab35 binds via switch regions I and II, around the nucleotide-binding pocket. Positional shifts in Rab residues required for nucleotide binding may lower its affinity for bound GDP, and a conformational change in switch I, which makes the nucleotide-binding pocket more solvent accessible, likely also facilitates exchange.

 

Insights regarding guanine nucleotide exchange from the structure of a DENN-domain protein complexed with its Rab GTPase substrate.,Wu X, Bradley MJ, Cai Y, Kummel D, De La Cruz EM, Barr FA, Reinisch KM Proc Natl Acad Sci U S A. 2011 Nov 7. PMID:22065758<ref>PMID:22065758</ref>

 

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

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*[[GTP-binding protein|GTP-binding protein]]

[[Category: Kummel, D.]]

[[Category: Reinisch, K M.]]

[[Category: Wu, X D.]]

[[Category: Guanine exchange factor]]

[[Category: Longin domain]]

[[Category: Rab gtpase]]