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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Clostridium botulinum C3 toxin ： ウィキペディア英語版 Clostridium botulinum C3 toxin Clostridium botulinum C3 exoenzyme is a toxin that causes the addition of one or more ADP-ribose moieties to Rho-like proteins. Many bacterial toxins nucleotide-binding modify by ADP-ribosylation proteins involved in essential cell functions, leading to their toxic effects. ==Action== The molecular basis of the action of these enzymes consists in binding of nicotinamide adenine dinucleotide (NAD), splitting NAD into its ADP-ribose and nicotinamide components, and transferring the ADP-ribose moiety to a specific residue on to a protein substrate, often of eukaryotic origin. All the toxins of this family share a highly conserved glutamate, which is the catalytic residue critical for the NAD-glycohydrolase activity. ADP-ribosyltransferase toxins have distinct substrate specificities and variable pathophysiological properties and can be subdivided into four subfamilies: diphtheria-like toxins, cholera-like toxins, binary toxins and C3-like exoenzymes. C3-like exoenzymes unlike other ADP-ribosyltransferase toxins do not require a specific cell-surface binding translocation component for cell entry. Their specificity is for the small GTP-binding proteins RhoA, RhoB, and RhoC, which are ADP-ribosylated on an asparagine residue. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Clostridium botulinum C3 toxin」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.