The Journal of Antibiotics
Online ISSN : 1881-1469
Print ISSN : 0021-8820
ISSN-L : 0021-8820
2-AMINO-5-METHYL-5-HEXENOIC ACID, A METHIONINE ANALOG PRODUCED BY STREPTOMYCES SP. MF374-C4
MIEKO TAKEUCHIHIRONOBU IINUMATOMIO TAKEUCHIHAMAO UMEZAWAKAYOKO SUZUKAKEMAKOTO HORI
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1979 Volume 32 Issue 11 Pages 1118-1124

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Abstract
2-Amino-5-methyl-5-hexenoic acid (AMHA), a new methionine analog, was isolated from a fermentation broth of Streptomyces sp. MF374-C4 based on its reversal of the effect of N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) in a test system that determines the size of growth zones of revertants (His+) of Salmonella typhimurium TA 1535. AMHA also inhibited growth of the tester strain in a synthetic medium. These AMHA activities were abolished by methionine. The incidence of spontaneous streptomycin-resistant mutations of Escherichia coli K12 was not decreased by AMHA at concentrations where cell growth was partially inhibited. AMHA inhibited protein synthesis but not DNA or RNA synthesis in S. typhimurium TA1535 and E. coli K-12. The analog inhibited formation of methionyl-tRNA but not of valyl-tRNA in a cell-free system of E. coli, and supported ATP-PPi exchange in the cell-free system. At concentrations where it inhibited cell growth, AMHA decreased the number of foci, induced by ROUS sarcoma virus, on cultured sheets of chick-embryo fibroblasts. The effects of AMHA on focus formation and on the cell growth were overcome by methionine.
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© Japan Antibiotics Research Association
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