5xc4

Crystal structure of GH45 endoglucanase EG27II at pH4.0, in complex with cellobiose

spinqualitylabelsall models 5xc4, resolution 1.42Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5xc4 is a 1 chain structure with sequence from Ampullaria crossean. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.42Å Ligands: BGC, PRD_900005 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A7KMF0_9CAEN Publication Abstract from PubMed Although endogenous animal cellulases have great potential for industrial applications such as bioethanol production, few investigations have focused on these enzymes. In this study, the glycoside hydrolase family 45 (GH45) subfamily B endoglucanase EG27II from the snail Ampullaria crossean was expressed using a Pichia pastoris expression system and the crystal structure of the apo form was determined at 1.00 A resolution; this is the highest resolution structure of an animal endoglucanase. The results showed that EG27II has a double-psi six-stranded beta-barrel and that the structure of EG27II more closely resembles those of subfamily C enzymes than those of subfamily A enzymes. The structure of EG27II complexed with cellobiose was also determined under cryoconditions and at room temperature at three pH values, pH 4.0, 5.5 and 8.0, and no structural changes were found to be associated with the change in pH. The structural comparison and catalytic activity measurements showed that Asp137 and Asn112 function as the catalytic acid and base, respectively, and that Asp27 is also an important residue for catalysis. These high-resolution structures of EG27II provide a large amount of information for structure-based enzyme modification and cell-surface engineering, which will advance biofuel production using animal-derived cellulases. High-resolution crystal structures of the glycoside hydrolase family 45 endoglucanase EG27II from the snail Ampullaria crossean.,Nomura T, Iwase H, Saka N, Takahashi N, Mikami B, Mizutani K Acta Crystallogr D Struct Biol. 2019 Apr 1;75(Pt 4):426-436. doi:, 10.1107/S2059798319003000. Epub 2019 Apr 4. PMID:30988259 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glucanase 3D structures

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