View source for 7ekx


==Crystal Structure of the Candida Glabrata Glycogen Debranching Enzyme (W470A E564Q) in complex with maltononaose==
<StructureSection load='7ekx' size='340' side='right'caption='[[7ekx]], [[Resolution|resolution]] 3.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7ekx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Candida_glabrata_CBS_138 Candida glabrata CBS 138]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7EKX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7EKX 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]] 3.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</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=7ekx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ekx OCA], [https://pdbe.org/7ekx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ekx RCSB], [https://www.ebi.ac.uk/pdbsum/7ekx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ekx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q6FSK0_CANGA Q6FSK0_CANGA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Debranching is a critical step in the mobilization of the important energy store glycogen. In eukaryotes, including fungi and animals, the highly conserved glycogen-debranching enzyme (GDE) debranches glycogen by a glucanotransferase (GT) reaction followed by a glucosidase (GC) reaction. Previous work indicated that these reactions are catalyzed by two active sites located more than 50 A apart and provided insights into their catalytic mechanisms and substrate recognition. Here, five crystal structures of GDE in complex with oligosaccharides with 4-9 glucose residues are presented. The data suggest that the glycogen main chain plays a critical role in binding to the GT and GC active sites of GDE and that a minimum of five main-chain residues are required for optimal binding.

Crystal structures of glycogen-debranching enzyme mutants in complex with oligosaccharides.,Shen M, Gong X, Xiang S Acta Crystallogr F Struct Biol Commun. 2021 Nov 1;77(Pt 11):420-426. doi:, 10.1107/S2053230X21010918. Epub 2021 Oct 29. PMID:34726181<ref>PMID:34726181</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7ekx" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Shen M]]
[[Category: Xiang S]]