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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 Cyclic di-GMP-I riboswitch ： ウィキペディア英語版 Cyclic di-GMP-I riboswitch Cyclic di-GMP-I riboswitches are a class of riboswitch that specifically bind cyclic di-GMP, which is a second messenger that is used in a variety of microbial processes including virulence, motility and biofilm formation. Cyclic di-GMP-I riboswitches were originally identified by bioinformatics as a conserved RNA-like structure called the "GEMM motif". These riboswitches are present in a wide variety of bacteria, and are most common in Clostridia and certain varieties of Proteobacteria. The riboswitches are present in pathogens such as ''Clostridium difficile'', ''Vibrio cholerae'' (which causes cholera) and ''Bacillus anthracis'' (which causes anthrax). ''Geobacter uraniumreducens'' is predicted to have 30 instances of this riboswitch in its genome. A bacteriophage that infects ''C. difficile'' is predicted to carry a cyclic di-GMP-I riboswitch, which it might use to detect and exploit the physiological state of bacteria that it infects. The discovery of this riboswitch class answers the question of how genes are regulated in response to cyclic di-GMP levels in many different bacteria. However, some bacteria in which cyclic di-GMP has been studied lack cyclic di-GMP-I riboswitches, e.g. ''Pseudomonas aeruginosa''. Cyclic di-GMP-I riboswitches are the first kind of riboswitch to be discovered whose role is not primarily in regulating metabolism, but is instead part of signaling. A second class of riboswitch that binds cyclic di-GMP is called the cyclic di-GMP-II riboswitch. The two classes of cyclic di-GMP-binding riboswitches do not share any known sequence or structural features. High-resolution three-dimensional structures of cyclic di-GMP-I riboswitches have been determined using X-ray crystallography. ==References== 〔 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「Cyclic di-GMP-I riboswitch」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.