View source for 4ua8


==EUR_01830 (maltotriose-binding protein) complexed with maltotriose==
<StructureSection load='4ua8' size='340' side='right'caption='[[4ua8]], [[Resolution|resolution]] 1.54&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4ua8]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Eubacterium_rectale_DSM_17629 Eubacterium rectale DSM 17629]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4UA8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4UA8 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]] 1.54&#8491;</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=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PRD_900009:alpha-maltotriose'>PRD_900009</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=4ua8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ua8 OCA], [https://pdbe.org/4ua8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ua8 RCSB], [https://www.ebi.ac.uk/pdbsum/4ua8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ua8 ProSAT]</span></td></tr>
</table>
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== Publication Abstract from PubMed ==
Eubacterium rectale is a prominent human gut symbiont yet little is known about the molecular strategies this bacterium has developed to acquire nutrients within the competitive gut ecosystem. Starch is one of the most abundant glycans in the human diet, and E. rectale increases in vivo when the host consumes a diet rich in resistant starch, although it is not a primary degrader of this glycan. Here we present the results of a quantitative proteomics study in which we identify two glycoside hydrolase 13 family enzymes, and three ABC transporter solute-binding proteins that are abundant during growth on starch and, we hypothesize, work together at the cell surface to degrade starch and capture the released maltooligosaccharides. EUR_21100 is a multidomain cell wall anchored amylase that preferentially targets starch polysaccharides, liberating maltotetraose, while the membrane associated maltogenic amylase EUR_01860 breaks down maltooligosaccharides longer than maltotriose. The three solute-binding proteins display a range of glycan-binding specificities that ensure the capture of glucose through maltoheptaose and some alpha1,6-branched glycans. Taken together, we describe a pathway for starch utilization by E. rectale DSM 17629 that may be conserved among other starch-degrading Clostridium cluster XIVa organisms in the human gut.

Molecular details of a starch utilization pathway in the human gut symbiont Eubacterium rectale.,Cockburn DW, Orlovsky NI, Foley MH, Kwiatkowski KJ, Bahr CM, Maynard M, Demeler B, Koropatkin NM Mol Microbiol. 2014 Nov 11. doi: 10.1111/mmi.12859. PMID:25388295<ref>PMID:25388295</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 4ua8" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Koropatkin NM]]
[[Category: Orlovsky NI]]