View source for 5fkr


==Unraveling the first step of xyloglucan degradation by the soil saprophyte Cellvibrio japonicus through the functional and structural characterization of a potent GH74 endo-xyloglucanase==
<StructureSection load='5fkr' size='340' side='right'caption='[[5fkr]], [[Resolution|resolution]] 2.28&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5fkr]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Cellvibrio_japonicus_Ueda107 Cellvibrio japonicus Ueda107]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5FKR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5FKR 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]] 2.28&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BR:BROMIDE+ION'>BR</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</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=5fkr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5fkr OCA], [https://pdbe.org/5fkr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5fkr RCSB], [https://www.ebi.ac.uk/pdbsum/5fkr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5fkr ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/B3PKK9_CELJU B3PKK9_CELJU] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The heteropolysaccharide xyloglucan (XyG) comprises up to one-quarter of the total carbohydrate content of terrestrial plant cell walls and, as such, represents a significant reservoir in the global carbon cycle. The complex composition of XyG requires a consortium of backbone-cleaving endo-xyloglucanases and side-chain cleaving exo-glycosidases for complete saccharification. The biochemical basis for XyG utilization by the model Gram-negative soil saprophytic bacterium Cellvibrio japonicus is incompletely understood, despite the recent characterization of associated side-chain cleaving exo-glycosidases. We present a detailed functional and structural characterization of a multimodular enzyme encoded by gene locus CJA_2477. The CJA_2477 gene product comprises an N-terminal glycoside hydrolase family 74 (GH74) endo-xyloglucanase module in train with two carbohydrate-binding modules (CBMs) from families 10 and 2 (CBM10 and CBM2). The GH74 catalytic domain generates Glc4 -based xylogluco-oligosaccharide (XyGO) substrates for downstream enzymes through an endo-dissociative mode of action. X-ray crystallography of the GH74 module, alone and in complex with XyGO products spanning the entire active site, revealed a broad substrate-binding cleft specifically adapted to XyG recognition, which is composed of two seven-bladed propeller domains characteristic of the GH74 family. The appended CBM10 and CBM2 members notably did not bind XyG, nor other soluble polysaccharides, and instead were specific cellulose-binding modules. Taken together, these data shed light on the first step of xyloglucan utilization by C. japonicus and expand the repertoire of GHs and CBMs for selective biomass analysis and utilization. DATABASE: Structural data have been deposited in the RCSB protein database under the Protein Data Bank codes: 5FKR, 5FKS, 5FKT and 5FKQ.

Functional and structural characterization of a potent GH74 endo-xyloglucanase from the soil saprophyte Cellvibrio japonicus unravels the first step of xyloglucan degradation.,Attia M, Stepper J, Davies GJ, Brumer H FEBS J. 2016 May;283(9):1701-19. doi: 10.1111/febs.13696. Epub 2016 Mar 30. PMID:26929175<ref>PMID:26929175</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5fkr" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Cellvibrio japonicus Ueda107]]
[[Category: Large Structures]]
[[Category: Attia M]]
[[Category: Brumer H]]
[[Category: Davies GJ]]
[[Category: Stepper J]]