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2vnr

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{{STRUCTURE_2vnr| PDB=2vnr | SCENE= }}
{{STRUCTURE_2vnr| PDB=2vnr | SCENE= }}
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'''FAMILY 51 CARBOHYDRATE BINDING MODULE FROM A FAMILY 98 GLYCOSIDE HYDROLASE PRODUCED BY CLOSTRIDIUM PERFRINGENS.'''
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===FAMILY 51 CARBOHYDRATE BINDING MODULE FROM A FAMILY 98 GLYCOSIDE HYDROLASE PRODUCED BY CLOSTRIDIUM PERFRINGENS.===
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==Overview==
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The genomes of myonecrotic Clostridium perfringens isolates contain genes encoding a large and fascinating array of highly modular glycoside hydrolase enzymes. Though the catalytic activities of many of these enzymes are somewhat predictable based on their amino acid sequences the functions of their abundant ancillary modules are not and these remain poorly studied. Here we present the structural and functional analysis of a new family of ancillary carbohydrate-binding module (CBM), CBM51, which was previously annotated in databases as the NPCBM domain. The high resolution crystal structures of two CBM51 examples, GH95CBM51 and GH98CBM51, from a putative family 95 alpha-fucosidase and from a family 98 blood group A/B-antigen specific endo-beta-galactosidase, respectively, showed them to have highly similar beta-sandwich folds. However, GH95CBM51 was shown by glycan microarray screening, isothermal titration calorimetry, and X-ray crystallography to bind galactose residues while the same analysis of GH98CBM51 revealed specificity for the blood group A/B-antigens through non-conserved interactions. Overall, this work identifies a new family of CBMs with many members having apparent specificity for eukaryotic glycans, in keeping with the glycan rich environment C. perfringens would experience in its host. However, a wider bioinformatic analysis of this CBM family also indicated a large number of members in non-pathogenic environmental bacteria suggesting a role in the recognition of environmental glycans.
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==About this Structure==
==About this Structure==
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[[Category: Family 98 glycoside hydrolase]]
[[Category: Family 98 glycoside hydrolase]]
[[Category: Hydrolase]]
[[Category: Hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 19:03:09 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 15:08:45 2008''

Revision as of 12:08, 28 July 2008

Image:2vnr.png

Template:STRUCTURE 2vnr

FAMILY 51 CARBOHYDRATE BINDING MODULE FROM A FAMILY 98 GLYCOSIDE HYDROLASE PRODUCED BY CLOSTRIDIUM PERFRINGENS.

Template:ABSTRACT PUBMED 18292090

About this Structure

2VNR is a Single protein structure of sequence from Clostridium perfringens. Full crystallographic information is available from OCA.

Reference

Divergent modes of glycan recognition by a new family of carbohydrate-binding modules., Gregg KJ, Finn R, Abbott DW, Boraston AB, J Biol Chem. 2008 Feb 21;. PMID:18292090

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