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<StructureSection load='6wpn' size='340' side='right'caption='[[6wpn]], [[Resolution|resolution]] 2.29&Aring;' scene=''>
<StructureSection load='6wpn' size='340' side='right'caption='[[6wpn]], [[Resolution|resolution]] 2.29&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6wpn]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Synsp Synsp]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6WPN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6WPN FirstGlance]. <br>
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6WPN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6WPN FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.29&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[6wpm|6wpm]]</div></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">00121 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1131 SYNSP])</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=6wpn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wpn OCA], [https://pdbe.org/6wpn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6wpn RCSB], [https://www.ebi.ac.uk/pdbsum/6wpn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6wpn ProSAT]</span></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=6wpn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6wpn OCA], [https://pdbe.org/6wpn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6wpn RCSB], [https://www.ebi.ac.uk/pdbsum/6wpn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6wpn ProSAT]</span></td></tr>
</table>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Paradigms of metabolic strategies employed by photoautotrophic marine picocyanobacteria have been challenged in recent years. Based on genomic annotations, picocyanobacteria are predicted to assimilate organic nutrients via ATP-binding cassette importers, a process mediated by substrate-binding proteins. We report the functional characterisation of a modified sugar-binding protein, MsBP, from a marine Synechococcus strain, MITS9220. Ligand screening of MsBP shows a specific affinity for zinc (KD ~ 1.3 muM) and a preference for phosphate-modified sugars, such as fructose-1,6-biphosphate, in the presence of zinc (KD ~ 5.8 muM). Our crystal structures of apo MsBP (no zinc or substrate-bound) and Zn-MsBP (with zinc-bound) show that the presence of zinc induces structural differences, leading to a partially-closed substrate-binding cavity. The Zn-MsBP structure also sequesters several sulphate ions from the crystallisation condition, including two in the binding cleft, appropriately placed to mimic the orientation of adducts of a biphosphate hexose. Combined with a previously unseen positively charged binding cleft in our two structures and our binding affinity data, these observations highlight novel molecular variations on the sugar-binding SBP scaffold. Our findings lend further evidence to a proposed sugar acquisition mechanism in picocyanobacteria alluding to a mixotrophic strategy within these ubiquitous photosynthetic bacteria.
Novel functional insights into a modified sugar-binding protein from Synechococcus MITS9220.,Ford BA, Michie KA, Paulsen IT, Mabbutt BC, Shah BS Sci Rep. 2022 Mar 21;12(1):4805. doi: 10.1038/s41598-022-08459-8. PMID:35314715<ref>PMID:35314715</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6wpn" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Synsp]]
[[Category: Ford BA]]
[[Category: Ford, B A]]
[[Category: Mabbutt BC]]
[[Category: Mabbutt, B C]]
[[Category: Michie KA]]
[[Category: Michie, K A]]
[[Category: Paulsen IT]]
[[Category: Paulsen, I T]]
[[Category: Shah BS]]
[[Category: Shah, B S]]
[[Category: Marine cyanobacteria]]
[[Category: Substrate-binding protein]]
[[Category: Sugar-binding protein]]
[[Category: Transport protein]]
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