4e2c
From Proteopedia
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| - | [[ | + | ==Crystal Structure of the periplasmic domain of the chimeric LPS O-antigen chain length regulator protein== |
| + | <StructureSection load='4e2c' size='340' side='right' caption='[[4e2c]], [[Resolution|resolution]] 2.80Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4e2c]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"shigella_paradysenteriae"_weldin_1927 "shigella paradysenteriae" weldin 1927]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E2C OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4E2C FirstGlance]. <br> | ||
| + | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3b8p|3b8p]], [[3b8m|3b8m]], [[3b8o|3b8o]], [[4e29|4e29]], [[4e2h|4e2h]], [[4e2l|4e2l]]</td></tr> | ||
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cld, rol, S2210, SF2089, wzzB, STM2079 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=623 "Shigella paradysenteriae" Weldin 1927])</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=4e2c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4e2c OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4e2c RCSB], [http://www.ebi.ac.uk/pdbsum/4e2c PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/WZZB_SHIFL WZZB_SHIFL]] Confers a modal distribution of chain length on the O-antigen component of lipopolysaccharide (LPS). Gives rise to a reduced number of short chain molecules and increases in numbers of longer molecules. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The surface O-antigen polymers of gram-negative bacteria exhibit a modal length distribution that depends on dedicated chain-length regulator periplasmic proteins (Polysaccharide Co-Polymerases, PCPs) anchored in the inner membrane by two transmembrane helices. In an attempt to determine whether structural changes underlie the O-antigen modal length specification we have determined crystal structures of several closely related PCPs, namely two chimeric PCP-1 family members solved at 1.5A and 2.6A and a wild-type PCP-1 from Shigella flexneri solved at 2.8A. The chimeric proteins form circular octamers while the wild type WzzB from Shigella flexneri was found to be an open trimer. We also present the structure of a WzzBFepE mutant, which exhibits severe attenuation in its ability to produce very long O-antigen polymers. Our findings suggest that the differences in the modal length distribution depend primarily on the surface-exposed amino acids in specific regions rather than on the differences in the oligomeric state of the PCP protomers. | ||
| - | + | Structural characterization of closely related o-antigen LPS-chain length regulators.,Kalynych S, Yao D, Magee J, Cygler M J Biol Chem. 2012 Mar 21. PMID:22437828<ref>PMID:22437828</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | == References == | |
| - | + | <references/> | |
| - | + | __TOC__ | |
| - | + | </StructureSection> | |
| - | + | [[Category: Shigella paradysenteriae weldin 1927]] | |
| - | == | + | [[Category: Cygler, M]] |
| - | < | + | [[Category: Kalynych, S]] |
| - | [[Category: Shigella | + | [[Category: Magee, J D]] |
| - | [[Category: Cygler, M | + | [[Category: Yao, D]] |
| - | [[Category: Kalynych, S | + | |
| - | [[Category: Magee, J D | + | |
| - | [[Category: Yao, D | + | |
[[Category: Bacterial inner membrane]] | [[Category: Bacterial inner membrane]] | ||
[[Category: Chimeric polysaccharide co-polymerase]] | [[Category: Chimeric polysaccharide co-polymerase]] | ||
[[Category: Membrane protein]] | [[Category: Membrane protein]] | ||
Revision as of 20:05, 24 December 2014
Crystal Structure of the periplasmic domain of the chimeric LPS O-antigen chain length regulator protein
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