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The FlmA-FlmB toxin-antitoxin system consists of FlmB RNA (F leading-region maintenance B), a family of non-coding RNAs and the protein toxin FlmA. The FlmB RNA transcript is 100 nucleotides in length and is homologous to sok RNA from the hok/sok system and fulfills the identical function as a post-segregational killing (PSK) mechanism. flmB is found on the F-plasmid of ''Escherichia coli'' and ''Salmonella enterica''. It is responsible for stabilising the plasmid. If the plasmid is not inherited, long-lived FlmA mRNA and protein will be highly toxic to the cell, possibly to the point of causing cell death.〔 Daughter cells which inherit the plasmid inherit the ''FlmB'' gene, coding for FlmB RNA which binds the leader sequence of FlmA mRNA and represses its translation.〔 ==See also== *Toxin-antitoxin system *IstR RNA *RdlD RNA *Sib RNA *SymR RNA *ptaRNA1 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「FlmA-FlmB toxin-antitoxin system」の詳細全文を読む スポンサード リンク
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