Garcia-Bustos J F, Pezzi N, Mendez E
Antimicrob Agents Chemother. 1985 May;27(5):791-7. doi: 10.1128/AAC.27.5.791.
Microcin 7 is a small peptide produced and excreted to the culture medium by stationary-phase Escherichia coli cells harboring the pMccC7 plasmid (formerly named pRYC7). This peptide inhibited the growth of the enterobacteria phylogenetically closer to E. coli, apparently by blocking protein biosynthesis. The molecule was degraded with trypsin, and the resulting fragments were purified and sequenced. The results show that microcin 7 is a linear heptapeptide blocked at both ends.
微菌素7是一种由携带pMccC7质粒(原名为pRYC7)的稳定期大肠杆菌细胞产生并分泌到培养基中的小肽。这种肽明显通过阻断蛋白质生物合成来抑制与大肠杆菌系统发育关系更近的肠杆菌的生长。该分子用胰蛋白酶降解,所得片段经纯化和测序。结果表明,微菌素7是一种两端封闭的线性七肽。