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High Resolution Crystal Structure of CBM32 from a N-acetyl-beta- hexosaminidase in complex with lacNAcHigh Resolution Crystal Structure of CBM32 from a N-acetyl-beta- hexosaminidase in complex with lacNAc
Structural highlights
FunctionOGA_CLOP1 Biological function unknown. Capable of hydrolyzing the glycosidic link of O-GlcNAcylated proteins. 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 PubMedClostridium perfringens is a notable colonizer of the human gastrointestinal tract. This bacterium is quite remarkable for a human pathogen by the number of glycoside hydrolases found in its genome. The modularity of these enzymes is striking as is the frequent occurrence of modules having amino acid sequence identity with family 32 carbohydrate-binding modules (CBMs), often referred to as F5/8 domains. Here we report the properties of family 32 CBMs from a C. perfringens N-acetyl-beta-hexosaminidase. Macroarray, UV difference, and isothermal titration calorimetry binding studies indicate a preference for the disaccharide LacNAc (beta-d-galactosyl-1,4-beta-d-N-acetylglucosamine). The molecular details of the interaction of this CBM with galactose, LacNAc, and the type II blood group H-trisaccharide are revealed by x-ray crystallographic studies at resolutions of 1.49, 2.4, and 2.3 A, respectively. The interaction of a carbohydrate-binding module from a Clostridium perfringens N-acetyl-beta-hexosaminidase with its carbohydrate receptor.,Ficko-Blean E, Boraston AB J Biol Chem. 2006 Dec 8;281(49):37748-57. Epub 2006 Sep 21. PMID:16990278[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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