The Journal of Antibiotics
Online ISSN : 1881-1469
Print ISSN : 0021-8820
ISSN-L : 0021-8820
A NEW GROUP OF ANTIBIOTICS, HYDROXAMIC ACID ANTIMYCOTIC ANTIBIOTICS
I. PRECURSOR-INITIATED CHANGES IN PRODUCTIVITY AND BIOSYNTHESIS OF NEOENACTINS NL1 AND NL2
HIROMASA OKADAKATSUMI YAMAMOTOSAYURI TSUTANOSHOSHIRO NAKAMURA
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1988 Volume 41 Issue 7 Pages 869-874

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Abstract

Neoenactins (NEs) are L-serine-containing antifungal antibiotics produced by Streptoverticillium olivoreticuli. The effect of supplementation of individual amino acids on the production of NEs by this organism was examined from both quantitative and qualitative view points by using a nitrogen source-restricted medium. L-Alanine, L-arginine, L-glutamine, L-histidine, L-lysine and L-proline increased significantly the total productivity of NEs without changing the production ratio of the congeners. The supplementation of L-norvaline, L-isoleucine, L-leucine and L-valine to the culture medium resulted in selective enhancement of the production of NEs A, B1, B2, and M1, respectively, while significant change was not observed in terms of overall production of NEs. When L-norleucine was employed as an amino acid supplement, new NE congeners, named NEs NL1. and NL2, were preferentially produced; but the amount of NEs produced was not markedly affected.

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