4ay0: Difference between revisions
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==High resolution crystal structure of the monomeric subunit-free Caf1M chaperone== | ==High resolution crystal structure of the monomeric subunit-free Caf1M chaperone== | ||
<StructureSection load='4ay0' size='340' side='right' caption='[[4ay0]], [[Resolution|resolution]] 1.52Å' scene=''> | <StructureSection load='4ay0' size='340' side='right' caption='[[4ay0]], [[Resolution|resolution]] 1.52Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4ay0]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[4ay0]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_pestis"_(lehmann_and_neumann_1896)_migula_1900 "bacillus pestis" (lehmann and neumann 1896) migula 1900]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4AY0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4AY0 FirstGlance]. <br> | ||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1p5u|1p5u]], [[1p5v|1p5v]], [[1z9s|1z9s]], [[4ayf|4ayf]], [[4az8|4az8]], [[4b0e|4b0e]], [[4b0m|4b0m]]</td></tr> | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1p5u|1p5u]], [[1p5v|1p5v]], [[1z9s|1z9s]], [[4ayf|4ayf]], [[4az8|4az8]], [[4b0e|4b0e]], [[4b0m|4b0m]]</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=4ay0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ay0 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ay0 RCSB], [http://www.ebi.ac.uk/pdbsum/4ay0 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=4ay0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ay0 OCA], [http://pdbe.org/4ay0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ay0 RCSB], [http://www.ebi.ac.uk/pdbsum/4ay0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4ay0 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 4ay0" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Dubnovitsky, A]] | [[Category: Dubnovitsky, A]] | ||
[[Category: Knight, S D]] | [[Category: Knight, S D]] | ||
Revision as of 16:14, 5 August 2016
High resolution crystal structure of the monomeric subunit-free Caf1M chaperoneHigh resolution crystal structure of the monomeric subunit-free Caf1M chaperone
Structural highlights
Function[CAF1M_YERPE] Has a stimulatory role for the envelope antigen F1 secretion. It seems to interact with the subunit polypeptide and to prevent it from digestion by a protease. Publication Abstract from PubMedMany virulence organelles of Gram-negative bacterial pathogens are assembled via the chaperone/usher pathway. The chaperone transports organelle subunits across the periplasm to the outer membrane usher, where they are released and incorporated into growing fibers. Here, we elucidate the mechanism of the usher-targeting step in assembly of the Yersinia pestis F1 capsule at the atomic level. The usher interacts almost exclusively with the chaperone in the chaperone:subunit complex. In free chaperone, a pair of conserved proline residues at the beginning of the subunit-binding loop form a "proline lock" that occludes the usher-binding surface and blocks usher binding. Binding of the subunit to the chaperone rotates the proline lock away from the usher-binding surface, allowing the chaperone-subunit complex to bind to the usher. We show that the proline lock exists in other chaperone/usher systems and represents a general allosteric mechanism for selective targeting of chaperone:subunit complexes to the usher and for release and recycling of the free chaperone. Allosteric Mechanism Controls Traffic in the Chaperone/Usher Pathway.,Di Yu X, Dubnovitsky A, Pudney AF, Macintyre S, Knight SD, Zavialov AV Structure. 2012 Sep 11. pii: S0969-2126(12)00298-5. doi:, 10.1016/j.str.2012.08.016. PMID:22981947[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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