A modification of the N-terminal amino acid in the eremomycin aglycone
1996
An Edman degradation of the antibiotic eremomycin aglycone produced the corresponding hexapeptide, which was aminoacylated with D-lysine, D-histidine or D-tryptophan derivatives to give new heptapeptide analogs of the eremomycin aglycone. The aminoacylation of the eremomycin aglycone produced an octapeptide analog. The substitution of D-lysine for the N-terminal N-methyl-D-leucine does not seriously affect the in vitro antibacterial properties of the eremomycin aglycone whereas the heptapeptides with the N-terminal D-tryptophan or D-histidine moieties and the octapeptide with the N-terminal D-lysine are practically devoid of the antibacterial properties.
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