2VO8

Cohesin module from Clostridium perfringens ATCC13124 family 33 glycoside hydrolase.

2VO8 の概要

• エントリーDOI: 10.2210/pdb2vo8/pdb
• 関連するPDBエントリー: 2V73
• 分子名称: EXO-ALPHA-SIALIDASE (2 entities in total)
• 機能のキーワード: hydrolase, cohesin, high affinity, glycoside hydrolase, clostridium perfringens
• 由来する生物種: CLOSTRIDIUM PERFRINGENS
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 15377.04

構造登録者

Gregg, K.,Adams, J.J.,Bayer, E.A.,Boraston, A.B.,Smith, S.P. (登録日: 2008-02-08, 公開日: 2008-09-02, 最終更新日: 2024-05-08)

主引用文献

Adams, J.J.,Gregg, K.,Bayer, E.A.,Boraston, A.B.,Smith, S.P.
Structural Basis of Clostridium Perfringens Toxin Complex Formation.
Proc.Natl.Acad.Sci.USA, 105:12194-, 2008

PubMed Abstract: The virulent properties of the common human and livestock pathogen Clostridium perfringens are attributable to a formidable battery of toxins. Among these are a number of large and highly modular carbohydrate-active enzymes, including the mu-toxin and sialidases, whose catalytic properties are consistent with degradation of the mucosal layer of the human gut, glycosaminoglycans, and other cellular glycans found throughout the body. The conservation of noncatalytic ancillary modules among these enzymes suggests they make significant contributions to the overall functionality of the toxins. Here, we describe the structural basis of an ultra-tight interaction (K(a) = 1.44 x 10(11) M(-1)) between the X82 and dockerin modules, which are found throughout numerous C. perfringens carbohydrate-active enzymes. Extensive hydrogen-bonding and van der Waals contacts between the X82 and dockerin modules give rise to the observed high affinity. The mu-toxin dockerin module in this complex is positioned approximately 180 degrees relative to the orientation of the dockerin modules on the cohesin module surface within cellulolytic complexes. These observations represent a unique property of these clostridial toxins whereby they can associate into large, noncovalent multitoxin complexes that allow potentiation of the activities of the individual toxins by combining complementary toxin specificities.

PubMed: 18716000
DOI: 10.1073/PNAS.0803154105

実験手法

X-RAY DIFFRACTION (1.7 Å)