2w1s

UNIQUE LIGAND BINDING SPECIFICITY OF A FAMILY 32 CARBOHYDRATE-BINDING MODULE FROM THE MU TOXIN PRODUCED BY CLOSTRIDIUM PERFRINGENS

spinqualitylabelsall models 2w1s, resolution 1.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2w1s is a 2 chain structure with sequence from Clostridium perfringens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: BTB, CA, NA NonStd Res: MSE Related: 2w1q, 2w1u, 2wdb Activity: Hyaluronoglucosaminidase, with EC number 3.2.1.35 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 Many carbohydrate-active enzymes have complex architectures comprising multiple modules that may be involved in catalysis, carbohydrate binding, or protein-protein interactions. Carbohydrate-binding modules (CBMs) are a common ancillary module whose function is to promote the adherence of the complete enzyme to carbohydrate substrates. CBM family 32 has been proposed to be one of the most diverse CBM families classified to date, yet all of the structurally characterized CBM32s thus far recognize galactose-based ligands. Here, we report a unique binding specificity and mode of ligand binding for a family 32 CBM. NagHCBM32-2 is one of four CBM32 modules in NagH, a family 84 glycoside hydrolase secreted by Clostridium perfringens. NagHCBM32-2 has the beta-sandwich scaffold common to members of the family; however, its specificity for N-acetylglucosamine is unusual among CBMs. X-ray crystallographic analysis of the module at resolutions from 1.45 to 2.0 A and in complex with disaccharides reveals that its mode of sugar recognition is quite different from that observed for galactose-specific CBM32s. This study continues to unravel the diversity of CBMs found in family 32 and how these CBMs might impart the carbohydrate-binding specificity to the extracellular glycoside hydrolases in C. perfringens. N-acetylglucosamine recognition by a family 32 carbohydrate-binding module from Clostridium perfringens NagH.,Ficko-Blean E, Boraston AB J Mol Biol. 2009 Jul 10;390(2):208-20. Epub 2009 May 5. PMID:19422833 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Hyaluronidase

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