6i5r
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==BlMnBP1 binding protein of an ABC transporter from Bifidobacterium animalis subsp. lactis ATCC27673 in complex with mannobiose== | |
| + | <StructureSection load='6i5r' size='340' side='right'caption='[[6i5r]], [[Resolution|resolution]] 1.60Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[6i5r]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6I5R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6I5R FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=6i5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6i5r OCA], [http://pdbe.org/6i5r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6i5r RCSB], [http://www.ebi.ac.uk/pdbsum/6i5r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6i5r ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Human gut bifidobacteria rely on ATP-binding cassette (ABC) transporters for oligosaccharide uptake. Multiple oligosaccharide-specific solute binding protein (SBP) genes are occasionally associated with a single ABC transporter, but the significance of this multiplicity remains unclear. Here, we characterize BlMnBP1 and BlMnBP2, the two SBPs associated to the beta-manno-oligosaccharide (MnOS) ABC transporter in Bifidobacterium animalis subsp. lactis. Despite similar overall specificity and preference to mannotriose (Kd approximately 80 nM), affinity of BlMnBP1 is up to 2570-fold higher for disaccharides than BlMnBP2. Structural analysis revealed a substitution of an asparagine that recognizes the mannosyl at position 2 in BlMnBP1, by a glycine in BlMnBP2, which affects substrate affinity. Both substitution-types occur in bifidobacterial SBPs, but BlMnBP1-like variants prevail in human-gut isolates. B. animalis subsp. lactis ATCC27673 showed growth on gluco- and galactomannans and was able to outcompete a mannan-degrading Bacteroides ovatus strain in co-cultures, attesting the efficiency of this ABC uptake system. By contrast, a strain that lacks this transporter failed to grow on mannan. This study highlights SBP diversification as a possible strategy to modulate oligosaccharide uptake preferences of bifidobacterial ABC-transporters during adaptation to specific ecological niches. Efficient metabolism of galactomannan by distinct bifidobacteria, merits evaluating this plant glycan as a potential prebiotic. This article is protected by copyright. All rights reserved. | ||
| - | + | Two binding proteins of the ABC transporter that confers growth of Bifidobacterium animalis subsp. lactis ATCC27673 on beta-mannan possess distinct manno-oligosaccharide binding profiles.,Ejby M, Guskov A, Pichler MJ, Zanten GC, Schoof E, Saburi W, Slotboom DJ, Abou Hachem M Mol Microbiol. 2019 Apr 4. doi: 10.1111/mmi.14257. PMID:30947380<ref>PMID:30947380</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 6i5r" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Ejby, M]] | ||
| + | [[Category: Guskov, A]] | ||
| + | [[Category: Hachem, M Abou]] | ||
| + | [[Category: Slotboom, D J]] | ||
| + | [[Category: Bifidobacterium animalis subsp. lactis atcc27673]] | ||
| + | [[Category: Blac_00780]] | ||
| + | [[Category: Mannobiose]] | ||
| + | [[Category: Protein transport]] | ||
| + | [[Category: Solute binding protein]] | ||
Revision as of 05:57, 17 April 2019
BlMnBP1 binding protein of an ABC transporter from Bifidobacterium animalis subsp. lactis ATCC27673 in complex with mannobiose
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