3eng

STRUCTURE OF ENDOGLUCANASE V CELLOBIOSE COMPLEX

spinqualitylabelsall models 3eng, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3eng is a 1 chain structure with sequence from Humicola insolens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CBI Activity: Cellulase, with EC number 3.2.1.4 Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The structure of the catalytic core of the endoglucanase V (EGV) from Humicola insolens has been determined by the method of multiple isomorphous replacement at 1.5 A resolution. The final model, refined with X-PLOR and PROLSQ, has a crystallographic R factor of 0.163 (R(free) = 0.240) with deviations from stereochemical target values of 0.012 A and 0.037 degrees for bonds and angles, respectively. The model was further refined with SHELXL, including anisotropic modelling of the protein-atom temperature factors, to give a final model with an R factor of 0.105 and an R(free) of 0.154. The initial isomorphous replacement electron-density map was poor and uninterpretable but was improved by the use of synchrotron data collected at a wavelength chosen so as to optimize the f" contribution of the anomalous scattering from the heavy atoms. The structure of H. insolens EGV consists of a six-stranded beta-barrel domain, similar to that found in a family of plant defence proteins, linked by a number of disulfide-bonded loop regions. A long open groove runs across the surface of the enzyme either side of which lie the catalytic aspartate residues. The 9 A separation of the catalytic carboxylate groups is consistent with the observation that EGV catalyzes the hydrolysis of the cellulose, beta(1-->4) links with inversion of configuration at the anomeric C1 atom. This structure is the first representative from the glycosyl hydrolase family 45. Structure determination and refinement of the Humicola insolens endoglucanase V at 1.5 A resolution.,Davies GJ, Dodson G, Moore MH, Tolley SP, Dauter Z, Wilson KS, Rasmussen G, Schulein M Acta Crystallogr D Biol Crystallogr. 1996 Jan 1;52(Pt 1):7-17. PMID:15299721 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glucanase

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