View source for 5xsj


==XylFII-LytSN complex==
<StructureSection load='5xsj' size='340' side='right'caption='[[5xsj]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5xsj]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Clostridium_beijerinckii_NCIMB_8052 Clostridium beijerinckii NCIMB 8052]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5XSJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5XSJ 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]] 2.202&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=XYP:BETA-D-XYLOPYRANOSE'>XYP</scene></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=5xsj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5xsj OCA], [https://pdbe.org/5xsj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5xsj RCSB], [https://www.ebi.ac.uk/pdbsum/5xsj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5xsj ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/A6LW07_CLOB8 A6LW07_CLOB8] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
d-xylose, the main building block of plant biomass, is a pentose sugar that can be used by bacteria as a carbon source for bio-based fuel and chemical production through fermentation. In bacteria, the first step for d-xylose metabolism is signal perception at the membrane. We previously identified a three-component system in Firmicutes bacteria comprising a membrane-associated sensor protein (XylFII), a transmembrane histidine kinase (LytS) for periplasmic d-xylose sensing, and a cytoplasmic response regulator (YesN) that activates the transcription of the target ABC transporter xylFGH genes to promote the uptake of d-xylose. The molecular mechanism underlying signal perception and integration of these processes remains elusive, however. Here we purified the N-terminal periplasmic domain of LytS (LytSN) in a complex with XylFII and determined the conformational structures of the complex in its d-xylose-free and d-xylose-bound forms. LytSN contains a four-helix bundle, and XylFII contains two Rossmann fold-like globular domains with a xylose-binding cleft between them. In the absence of d-xylose, LytSN and XylFII formed a heterodimer. Specific binding of d-xylose to the cleft of XylFII induced a large conformational change that closed the cleft and brought the globular domains closer together. This conformational change led to the formation of an active XylFII-LytSN heterotetramer. Mutations at the d-xylose binding site and the heterotetramer interface diminished heterotetramer formation and impaired the d-xylose-sensing function of XylFII-LytS. Based on these data, we propose a working model of XylFII-LytS that provides a molecular basis for d-xylose utilization and metabolic modification in bacteria.

Molecular mechanism of environmental d-xylose perception by a XylFII-LytS complex in bacteria.,Li J, Wang C, Yang G, Sun Z, Guo H, Shao K, Gu Y, Jiang W, Zhang P Proc Natl Acad Sci U S A. 2017 Aug 1;114(31):8235-8240. doi:, 10.1073/pnas.1620183114. Epub 2017 Jul 17. PMID:28716923<ref>PMID:28716923</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5xsj" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Clostridium beijerinckii NCIMB 8052]]
[[Category: Large Structures]]
[[Category: Li JX]]
[[Category: Wang CY]]
[[Category: Zhang P]]