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1r6e

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Revision as of 07:22, 11 September 2015

Solution structure of the catalytic domain of SopE2

Structural highlights

1r6e is a 1 chain structure with sequence from Salty. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	SopE2 (SALTY)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[SOPE2_SALTY] Activator for CDC42 by directly engaging this Rho GTPase and acting as potent guanine nucleotide exchange factor (GEF). This activation results in actin cytoskeleton rearrangements and stimulates membrane ruffling, promoting bacterial entry into non-phagocytic cells. Also activates NF-kB, p38 and ERK kinases, which are known to be involved in the induction of IL-8 expression. Chaperone InvB is required for secretion, translocation and stabilization of intracellular levels of sopE2.^[1] ^[2]

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

SopE and SopE2 are delivered by the Salmonella type III secretion system into eukaryotic cells to promote cell invasion. SopE and SopE2 are potent guanine nucleotide exchange factors (GEFs) for Rho GTPases Cdc42 and Rac1 and constitute a novel class of Rho GEFs. Although the sequence of SopE-like GEFs is not at all homologous to those of the Dbl homology domain-containing eukaryotic GEFs, the mechanism of nucleotide release seems to have significant similarities. We have determined the solution structure of the catalytic domain (residues 69-240) of SopE2, showing that SopE2(69-240) comprises two three-helix bundles (alpha1alpha4alpha5 and alpha2alpha3alpha6) arranged in a Lambda shape. Compared to the crystal structure of SopE(78-240) in complex with Cdc42, SopE2(69-240) exhibits a less open Lambda shape due to movement of SopE(78-240) helices alpha2 and alpha5 to accommodate binding to the Cdc42 switch regions. In an NMR titration to investigate the SopE2(69-240)-Cdc42 interaction, the SopE2(69-240) residues affected by binding Cdc42 were very similar to the SopE(78-240) residues that contact Cdc42 in the SopE(78-240)-Cdc42 complex. Analysis of the backbone (15)N dynamics of SopE2(69-240) revealed flexibility in residues that link the two three-helix bundles, including the alpha3-alpha4 linker that incorporates a beta-hairpin and the catalytic loop, and the alpha5-alpha6 loop, and flexibility in residues involved in interaction with Cdc42. Together, these observations provide experimental evidence of a previously proposed mechanism of GEF-mediated nucleotide exchange based on the Rac1-Tiam1 complex structure, with SopE/E2 flexibility, particularly in the interbundle loops, enabling conformational rearrangements of the nucleotide binding region of Cdc42 through an induced fit type of binding. Such flexibility in SopE/E2 may also facilitate interaction through adaptive binding with alternative target proteins such as Rab5, allograft inflammatory factor 1, and apolipoprotein A-1.

solution structure, backbone dynamics, and interaction with Cdc42 of Salmonella guanine nucleotide exchange factor SopE2.,Williams C, Galyov EE, Bagby S Biochemistry. 2004 Sep 28;43(38):11998-2008. PMID:15379540^[3]

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

References

↑ Stender S, Friebel A, Linder S, Rohde M, Mirold S, Hardt WD. Identification of SopE2 from Salmonella typhimurium, a conserved guanine nucleotide exchange factor for Cdc42 of the host cell. Mol Microbiol. 2000 Jun;36(6):1206-21. PMID:10931274
↑ Huang FC, Werne A, Li Q, Galyov EE, Walker WA, Cherayil BJ. Cooperative interactions between flagellin and SopE2 in the epithelial interleukin-8 response to Salmonella enterica serovar typhimurium infection. Infect Immun. 2004 Sep;72(9):5052-62. PMID:15321998 doi:http://dx.doi.org/10.1128/IAI.72.9.5052-5062.2004
↑ Williams C, Galyov EE, Bagby S. solution structure, backbone dynamics, and interaction with Cdc42 of Salmonella guanine nucleotide exchange factor SopE2. Biochemistry. 2004 Sep 28;43(38):11998-2008. PMID:15379540 doi:10.1021/bi0490744

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/1r6e"

@@ Line 2: / Line 2: @@
 <StructureSection load='1r6e' size='340' side='right' caption='[[1r6e]], [[NMR_Ensembles_of_Models | 20 NMR models]]' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1r6e]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Salmonella_enterica_subsp._enterica_serovar_typhimurium_str._lt2 Salmonella enterica subsp. enterica serovar typhimurium str. lt2]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R6E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1R6E FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1r6e]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Salty Salty]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R6E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1R6E FirstGlance]. <br>
-</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SopE2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=99287 Salmonella enterica subsp. enterica serovar Typhimurium str. LT2])</td></tr>
+</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SopE2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=99287 SALTY])</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=1r6e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r6e OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1r6e RCSB], [http://www.ebi.ac.uk/pdbsum/1r6e 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=1r6e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1r6e OCA], [http://pdbe.org/1r6e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1r6e RCSB], [http://www.ebi.ac.uk/pdbsum/1r6e PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1r6e" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Salmonella enterica subsp. enterica serovar typhimurium str. lt2]]
+[[Category: Salty]]
 [[Category: Bagby, S]]
 [[Category: Galyov, E E]]

1r6e

From Proteopedia

Revision as of 07:22, 11 September 2015

Solution structure of the catalytic domain of SopE2

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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