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Plant and Cell Physiology, 1966, Vol. 7, No. 1 93-104
© 1966

Article

BACTERIAL BREAKDOWN OF {varepsilon}-CAPROLACTAM AND ITS CYCLIC OLIGOMERS

TAKASHI FUKUMURA

Basic Research Laboratories, Toyo Rayon Co., Ltd. Tebiro, Kamakura

Eleven different types of bacteria were isolated which were capable of growing on {varepsilon}-caprolactam, the monomeric material for nylon 6 polyamide, as the sole source of both carbon and nitrogen.

The optimal concentration of {varepsilon}-caprolactam for the bacterial growth was about 0.6% in a synthetic liquid medium enriched with a small amount of yeast extract.

The bacterial strains grew also on {gamma}-butyrolactam, {delta}-valerolactam and the {omega}-amino acids corresponding to these lactams and {varepsilon}-caprolactam. Ammonium adipate was a good substrate for the growth of all the strains.

One strain of Corynebacterium aurantiacum was found to be capable of utilizing cyclic and linear oligomers of 6-aminocaproic acid with an exception of cyclic dimer.

The strains of corynebacteria required vitamin B1 for growth.

Metabolism of {varepsilon}-caprolactam and related compounds is discussed briefly.

(Received September 9, 1965; )
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