3ii1 | pdb_00003ii1

Structural characterization of difunctional glucanase-xylanse CelM2

spinqualitylabelsall models 3ii1, resolution 2.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3ii1 is a 1 chain structure with sequence from Uncultured bacterium. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.25Å Ligands: BGC, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A1E9A6_9BACT 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 bifunctional glycoside hydrolase enzyme, CelM2, is able to hydrolyze glucan and xylan effectively. The crystal structure of this protein has been determined, providing useful sequential and structural information [K.H. Nam, S.J. Kim, K.Y. Hwang, Crystal structure of CelM2, a bifunctional glucanase-xylanase protein from a metagenome library, Biochem. Biophys. Res. Commun. 383 (2009) 183-186]. In addition, this protein is a good model for understanding bifunctional enzymes, and it will provide information relevant for genetic engineering that will be useful in the design of bifunctional proteins. However, previous structural characterization was not sufficient to develop an understanding of the metal ion and substrate-binding moiety. Herein, we determined the metal-binding site of CelM2 using zinc ions. Our results revealed that the zinc ions participate in the crystallographic packing and enzyme folding of the external region of the TIM-like barrel domain. Based on our structure, zinc ions induce the passive form of the CAP region at the catalytic cleft of the CelM2 protein. Moreover, glucose was bound to the CelM2 structure at the catalytic site. This structure provides the binding moiety that binds to the hydroxyl group of substrates such as cellulose. In addition, a structural comparison of celM2 with Cel44 provides a good model of the binding mode of CelM2. Thus, our study represents a novel structural characterization of the metal-binding site and the structure of the complex formed between CelM2 and its substrate. Structural characterization of the bifunctional glucanase-xylanase CelM2 reveals the metal effect and substrate-binding moiety.,Nam KH, Lee WH, Rhee KH, Hwang KY Biochem Biophys Res Commun. 2010 Jan 22;391(4):1726-30. Epub 2009 Dec 31. PMID:20043877 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glucanase 3D structures

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