Abstract
A methanol-utilizing bacterium, which produced red to pink pigments and assimilated methanol via icl- serine pathway, was isolated from soil and tentatively designated as Pseudomonas MS31. This bacterium produced L-serine when glycine was added to the growth medium at the late exponential phase of growth. The cells showed high L-serine degradation activity. Chelating agents and some metal ions, which inhibited L-serine degradation, stimulated the L-serine accumulation. In the presence of 0.11 mM EDTA, o-phenanthroline, 8-hydroxyquinoline, αα'-dipyridyl, cobalt sulfate or nickel sulfate, this bacterium produced 0.72.1 mg L-serine from 4 mg glycine per ml culture.
