3lt7: Difference between revisions
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==A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the M3 mutant structure== | ==A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the M3 mutant structure== | ||
<StructureSection load='3lt7' size='340' side='right' caption='[[3lt7]], [[Resolution|resolution]] 1.50Å' scene=''> | <StructureSection load='3lt7' size='340' side='right' caption='[[3lt7]], [[Resolution|resolution]] 1.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3lt7]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3lt7]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacterium_enterocoliticum"_schleifstein_and_coleman_1939 "bacterium enterocoliticum" schleifstein and coleman 1939]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LT7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3LT7 FirstGlance]. <br> | ||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3lt6|3lt6]], [[3h7x|3h7x]], [[3h7z|3h7z]]</td></tr> | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3lt6|3lt6]], [[3h7x|3h7x]], [[3h7z|3h7z]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">yadA, invA, yop1, yopA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=630 | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">yadA, invA, yop1, yopA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=630 "Bacterium enterocoliticum" Schleifstein and Coleman 1939])</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=3lt7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lt7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3lt7 RCSB], [http://www.ebi.ac.uk/pdbsum/3lt7 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=3lt7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lt7 OCA], [http://pdbe.org/3lt7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3lt7 RCSB], [http://www.ebi.ac.uk/pdbsum/3lt7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3lt7 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/ | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3lt7 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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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 3lt7" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Adhesin|Adhesin]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Bacterium enterocoliticum schleifstein and coleman 1939]] | ||
[[Category: Hernandez-Alvarez, B]] | [[Category: Hernandez-Alvarez, B]] | ||
[[Category: Lupas, A N]] | [[Category: Lupas, A N]] | ||
Revision as of 22:56, 11 August 2016
A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the M3 mutant structureA transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled coil segment of trimeric autotransporter adhesins - the M3 mutant structure
Structural highlights
Function[YADA1_YEREN] Collagen-binding outer membrane protein forming a fibrillar matrix on the bacterial cell surface. Promotes initial attachment and invasion of eukaryotic cells. Also protects the bacteria by being responsible for agglutination, serum resistance, complement inactivation and phagocytosis resistance.[1] 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 PubMedTrimeric autotransporter adhesins (TAAs) represent an important class of pathogenicity factors in proteobacteria. Their defining feature is a conserved membrane anchor, which forms a 12-stranded beta-barrel through the outer membrane. The proteins are translocated through the pore of this barrel and, once export is complete, the pore is occluded by a three-stranded coiled coil with canonical heptad (7/2) sequence periodicity. In many TAAs this coiled coil is extended by a segment of varying length, which has pentadecad (15/4) periodicity. We used X-ray crystallography and biochemical methods to analyze the transition between these two periodicities in the coiled-coil stalk of the Yersinia adhesin YadA. Our results show how the strong right-handed supercoil of the 15/4-periodic part locally undergoes further over-winding to 19/5, before switching at a fairly constant rate over 14 residues to the canonical left-handed supercoil of the 7/2-periodic part. The transition region contains two YxD motifs, which are characteristic for right-handed coiled-coil segments of TAAs. This novel coiled-coil motif forms a defined network of inter- and intrahelical hydrogen bonds, thus serving as a structural determinant. Supercoil fluctuations have hitherto been described in coiled coils whose main sequence periodicity is disrupted locally by discontinuities. Here we present the first detailed analysis of two fundamentally different coiled-coil periodicities being accommodated in the same structure. A transition from strong right-handed to canonical left-handed supercoiling in a conserved coiled-coil segment of trimeric autotransporter adhesins.,Alvarez BH, Gruber M, Ursinus A, Dunin-Horkawicz S, Lupas AN, Zeth K J Struct Biol. 2010 May;170(2):236-45. Epub 2010 Feb 21. PMID:20178846[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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