Thiamine-induced formation of the monopyrrole moiety of prodigiosin.

Journal of Bacteriology
M C Goldschmidt, R P Williams

Abstract

Thiamine stimulates the production of a red pigment, which is chromatographically and spectrophotometrically identical to prodigiosin, by growing cultures of Serratia marcescens mutant 9-3-3. This mutant is blocked in the formation of 2-methyl-3-amylpyrrole (MAP), the monopyrrole moiety of prodigiosin, but accumulates 4-methoxy-2,2,'-bipyrrole-5-carboxaldehyde (MBC) and can couple this compound with MAP to form prodigiosin. Addition of thiamine caused production of MAP, and as little as 0.02 mg of thiamine per ml in a peptone-glycerol medium stimulated production of measurable amounts of prodigiosin. Phosphate salts and another type of peptone decreased the thiamine-induced formation of prodigiosin; yeast extract and glycerol enhanced the formation of this substance. Thiamine also enhanced production of prodigiosin by wild-type strain Nima of S. marcescens. The thiamine antagonists, oxythiamine and pyrithiamine, inhibited thiamine-induced production of MAP and of prodigiosin by the mutant strain 9-3-3, formation of prodigiosin by the wild-type strain Nima, and production of MAP by another mutant, strain WF. The pyrimidine moiety of thiamine was only 10% as effective as the vitamin; the thiazole moiety, only 4%; and the two moie...Continue Reading

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Nov 1, 1994·Letters in Applied Microbiology·M SoléJ G Lorén
Nov 17, 2006·Nature Reviews. Microbiology·Neil R WilliamsonGeorge P C Salmond
Feb 6, 2013·Preparative Biochemistry & Biotechnology·Xiaoxia LiuHaimeng Zhou
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