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| | ==Structure of the HopA1-SchA Chaperone-Effector Complex== | | ==Structure of the HopA1-SchA Chaperone-Effector Complex== |
| - | <StructureSection load='4g6t' size='340' side='right' caption='[[4g6t]], [[Resolution|resolution]] 1.56Å' scene=''> | + | <StructureSection load='4g6t' size='340' side='right'caption='[[4g6t]], [[Resolution|resolution]] 1.56Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4g6t]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Pseudomonas_syringae_pv._tomato_str._dc3000 Pseudomonas syringae pv. tomato str. dc3000]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4G6T OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4G6T FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4g6t]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_syringae_pv._tomato_str._DC3000 Pseudomonas syringae pv. tomato str. DC3000]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4G6T OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4G6T FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">shcA, PSPTO_5353 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=223283 Pseudomonas syringae pv. tomato str. DC3000]), hopA1, PSPTO_5354 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=223283 Pseudomonas syringae pv. tomato str. DC3000])</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.56Å</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=4g6t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4g6t OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4g6t RCSB], [http://www.ebi.ac.uk/pdbsum/4g6t PDBsum]</span></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=4g6t FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4g6t OCA], [https://pdbe.org/4g6t PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4g6t RCSB], [https://www.ebi.ac.uk/pdbsum/4g6t PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4g6t ProSAT]</span></td></tr> |
| | </table> | | </table> |
| - | <div style="background-color:#fffaf0;">
| + | == Function == |
| - | == Publication Abstract from PubMed == | + | [https://www.uniprot.org/uniprot/Q87UE6_PSESM Q87UE6_PSESM] |
| - | Pseudomonas syringae injects numerous bacterial proteins into host plant cells through a type 3 secretion system (T3SS). One of the first such bacterial effectors discovered, HopA1, is a protein that has unknown functions in the host cell but possesses close homologs that trigger the plant hypersensitive response in resistant strains. Like the virulence factors in many bacterial pathogens of animals, HopA1 depends upon a cognate chaperone in order to be effectively translocated by the P. syringae T3SS. Herein, we report the crystal structure of a complex of HopA1(21-102) with its chaperone, ShcA, determined to 1.56-A resolution. The structure reveals that three key features of the chaperone-effector interactions found in animal pathogens are preserved in the Gram-negative pathogens of plants, namely, (i) the interaction of the chaperone with a nonglobular polypeptide of the effector, (ii) an interaction centered on the so-called beta-motif, and (iii) the presence of a conserved hydrophobic patch in the chaperone that recognizes the beta-motif. Structure-based mutagenesis and biochemical studies have established that the beta-motif is critical for the stability of this complex. Overall, these results show that the beta-motif interactions are broadly conserved in bacterial pathogens utilizing T3SSs, spanning an interkingdom host range.
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| - | Structure of the HopA1(21-102)-ShcA chaperone-effector complex of Pseudomonas syringae reveals conservation of a virulence factor binding motif from animal to plant pathogens.,Janjusevic R, Quezada CM, Small J, Stebbins CE J Bacteriol. 2013 Feb;195(4):658-64. doi: 10.1128/JB.01621-12. Epub 2012 Nov 30. PMID:23204470<ref>PMID:23204470</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
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| - | == References ==
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| - | <references/>
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Pseudomonas syringae pv. tomato str. dc3000]] | + | [[Category: Large Structures]] |
| - | [[Category: Janjusevic, R]] | + | [[Category: Pseudomonas syringae pv. tomato str. DC3000]] |
| - | [[Category: Quezada, C M]] | + | [[Category: Janjusevic R]] |
| - | [[Category: Stebbins, C E]] | + | [[Category: Quezada CM]] |
| - | [[Category: Chaperone]]
| + | [[Category: Stebbins CE]] |
| - | [[Category: Chaperone effector]]
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| - | [[Category: Secretion chaperone]]
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