View source for 7veq


==Crystal structure of bacterial chemotaxis-dependent pectin-binding protein SPH1118 in an open conformation==
<StructureSection load='7veq' size='340' side='right'caption='[[7veq]], [[Resolution|resolution]] 1.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7veq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Sphingomonas_sp._A1 Sphingomonas sp. A1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7VEQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7VEQ 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]] 1.696&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</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=7veq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7veq OCA], [https://pdbe.org/7veq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7veq RCSB], [https://www.ebi.ac.uk/pdbsum/7veq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7veq ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
Gram-negative Sphingomonas sp. strain A1 exhibits positive chemotaxis toward acidic polysaccharide pectin. SPH1118 has been identified as a pectin-binding protein involved in both pectin chemotaxis and assimilation. Here we show tertiary structures of SPH1118 with six different conformations as determined by X-ray crystallography. SPH1118 consisted of two domains with a large cleft between the domains and substrates bound to positively charged and aromatic residues in the cleft through hydrogen bond and stacking interactions. Substrate-free SPH1118 adopted three different conformations in the open form. On the other hand, the two domains were closed in substrate-bound form and the domain closure ratio was changed in response to the substrate size, suggesting that the conformational change upon binding to the substrate triggered the expression of pectin chemotaxis and assimilation. This study first clarified that the solute-binding protein with dual functions recognized the substrate through flexible conformational changes in response to the substrate size.

Substrate size-dependent conformational changes of bacterial pectin-binding protein crucial for chemotaxis and assimilation.,Anamizu K, Takase R, Hio M, Watanabe D, Mikami B, Hashimoto W Sci Rep. 2022 Jul 25;12(1):12653. doi: 10.1038/s41598-022-16540-5. PMID:35879323<ref>PMID:35879323</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Sphingomonas sp. A1]]
[[Category: Anamizu K]]
[[Category: Hashimoto W]]
[[Category: Hio M]]
[[Category: Mikami B]]
[[Category: Takase R]]
[[Category: Watanebe D]]