View source for 6ixy


==X-ray structure of major pilin from C. perfringens SM101==
<StructureSection load='6ixy' size='340' side='right'caption='[[6ixy]], [[Resolution|resolution]] 2.72&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6ixy]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Clostridium_perfringens_SM101 Clostridium perfringens SM101]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6IXY OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6IXY FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.72&#8491;</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=6ixy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ixy OCA], [https://pdbe.org/6ixy PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6ixy RCSB], [https://www.ebi.ac.uk/pdbsum/6ixy PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6ixy ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q0SWL8_CLOPS Q0SWL8_CLOPS] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Pili in Gram-positive bacteria are flexible rod proteins associated with the bacterial cell surface, and they play important roles in the initial adhesion to host tissues and colonization. The pilus shaft is formed by the covalent polymerization of major pilins, catalyzed by sortases, a family of cysteine transpeptidases. Here, X-ray structures of the major pilins from Clostridium perfringens strains 13 and SM101 and of sortase from strain SM101 are presented with biochemical analysis to detect the formation of pili in vivo. The major pilin from strain 13 adopts an elongated structure to form noncovalently linked polymeric chains in the crystal, yielding a practical model of the pilus fiber structure. The major pilin from strain SM101 adopts a novel bent structure and associates to form a left-handed twist like an antiparallel double helix in the crystal, which is likely to promote bacterial cell-cell interactions. A modeling study showed that pilin with a bent structure interacts favorably with sortase. The major pilin from strain SM101 was considered to be in an equilibrium state between an elongated and a bent structure through dynamic conformational change, which may be involved in pili-mediated colonization and sortase-mediated polymerization of pili.

Structures of major pilins in Clostridium perfringens demonstrate dynamic conformational change.,Tamai E, Katayama S, Sekiya H, Nariya H, Kamitori S Acta Crystallogr D Struct Biol. 2019 Aug 1;75(Pt 8):718-732. doi:, 10.1107/S2059798319009689. Epub 2019 Jul 30. PMID:31373571<ref>PMID:31373571</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6ixy" style="background-color:#fffaf0;"></div>

==See Also==
*[[Pilin 3D structures|Pilin 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Clostridium perfringens SM101]]
[[Category: Large Structures]]
[[Category: Kamitori S]]
[[Category: Tamai E]]