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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 SMK box riboswitch ： ウィキペディア英語版 SMK box riboswitch The SMKbox riboswitch (also known as SAM-III) is a RNA element that regulates gene expression in bacteria. The SMK box riboswitch is found in the 5' UTR of the MetK gene in lactic acid bacteria. The structure of this element changes upon binding to S-adenosyl methionine (SAM) to a conformation that blocks the shine-dalgarno sequence and blocks translation of the gene. There are other known SAM-binding riboswitches such as SAM-I and SAM-II, but these appear to share no similarity in sequence or structure to SAM-III. ==Structure== The crystal structure of the riboswitch from ''E. faecalis'' was solved by X-ray crystallography. The structure showed that the most conserved nucleotides involved in SAM binding were organised around a junction between three helices.〔 In some species there are large insertions of up to 210 nucleotides within this structure. 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「SMK box 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.