View source for 6rbg


==full-length bacterial polysaccharide co-polymerase==
<StructureSection load='6rbg' size='340' side='right'caption='[[6rbg]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6rbg]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RBG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6RBG FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3&#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=6rbg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6rbg OCA], [https://pdbe.org/6rbg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6rbg RCSB], [https://www.ebi.ac.uk/pdbsum/6rbg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6rbg ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/WZZB_ECOLI WZZB_ECOLI] 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 ==
Lipopolysaccharides are important components of the bacterial cell envelope that among other things act as a protective barrier against the environment and toxic molecules such as antibiotics. One of the most widely disseminated pathways of polysaccharide biosynthesis is the inner membrane bound Wzy-dependent pathway. Here we present the 3.0 A structure of the co-polymerase component of this pathway, WzzB from E. coli solved by single-particle cryo-electron microscopy. The overall architecture is octameric and resembles a box jellyfish containing a large bell-shaped periplasmic domain with the 2-helix transmembrane domain from each protomer, positioned 32 A apart, encircling a large empty transmembrane chamber. This structure also reveals the architecture of the transmembrane domain, including the location of key residues for the Wzz-family of proteins and the Wzy-dependent pathway present in many Gram-negative bacteria, explaining several of the previous biochemical and mutational studies and lays the foundation for future investigations.

Structure of a full-length bacterial polysaccharide co-polymerase.,Wiseman B, Nitharwal RG, Widmalm G, Hogbom M Nat Commun. 2021 Jan 14;12(1):369. doi: 10.1038/s41467-020-20579-1. PMID:33446644<ref>PMID:33446644</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6rbg" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Hogbom M]]
[[Category: Nitharwal RG]]
[[Category: Wiseman B]]