View source for 4jvs


==Crystal structure of LepB GAP domain from Legionella drancourtii in complex with Rab1-GDP and AlF3==
<StructureSection load='4jvs' size='340' side='right'caption='[[4jvs]], [[Resolution|resolution]] 2.78&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4jvs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Legionella_drancourtii_LLAP12 Legionella drancourtii LLAP12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4JVS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4JVS FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACY:ACETIC+ACID'>ACY</scene>, <scene name='pdbligand=AF3:ALUMINUM+FLUORIDE'>AF3</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></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=4jvs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4jvs OCA], [https://pdbe.org/4jvs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4jvs RCSB], [https://www.ebi.ac.uk/pdbsum/4jvs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4jvs ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/G9EPL4_9GAMM G9EPL4_9GAMM] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Rab GTPases are emerging targets of diverse bacterial pathogens. Here, we perform biochemical and structural analyses of LepB, a Rab GTPase-activating protein (GAP) effector from Legionella pneumophila. We map LepB GAP domain to residues 313-618 and show that the GAP domain is Rab1 specific with a catalytic activity higher than the canonical eukaryotic TBC GAP and the newly identified VirA/EspG family of bacterial RabGAP effectors. Exhaustive mutation analyses identify Arg444 as the arginine finger, but no catalytically essential glutamine residues. Crystal structures of LepB313-618 alone and the GAP domain of Legionella drancourtii LepB in complex with Rab1-GDP-AlF3 support the catalytic role of Arg444, and also further reveal a 3D architecture and a GTPase-binding mode distinct from all known GAPs. Glu449, structurally equivalent to TBC RabGAP glutamine finger in apo-LepB, undergoes a drastic movement upon Rab1 binding, which induces Rab1 Gln70 side-chain flipping towards GDP-AlF3 through a strong ionic interaction. This conformationally rearranged Gln70 acts as the catalytic cis-glutamine, therefore uncovering an unexpected RasGAP-like catalytic mechanism for LepB. Our studies highlight an extraordinary structural and catalytic diversity of RabGAPs, particularly those from bacterial pathogens.Cell Research advance online publication 16 April 2013; doi:10.1038/cr.2013.54.

Structural analyses of Legionella LepB reveal a new GAP fold that catalytically mimics eukaryotic RasGAP.,Yu Q, Hu L, Yao Q, Zhu Y, Dong N, Wang DC, Shao F Cell Res. 2013 Apr 16. doi: 10.1038/cr.2013.54. PMID:23588383<ref>PMID:23588383</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4jvs" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Legionella drancourtii LLAP12]]
[[Category: Shao F]]
[[Category: Wang D-C]]
[[Category: Yao Q]]
[[Category: Yu Q]]