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. 1977 Jan;129(1):124–130. doi: 10.1128/jb.129.1.124-130.1977

Biosynthesis of prodigiosin by non-proliferating wild-type Serratia marcescens and mutants deficient in catabolism of alanine, histidine, and proline.

D V Lim, S M Qadri, C Nichols, R P Williams
PMCID: PMC234904  PMID: 318635

Abstract

Mutants of Serratia marcescens Nima, designated as Aut, Hut, or Put, did not utilize L-alanine, L-histidine, or L-proline, respectively, as a sole carbon source but did utilize other amino acids or glycerol as carbon sources. The bacteria were permeable to alanine, histidine, and proline but lacked the enzymes responsible for degradation of these amino acids. The Aut mutant contained no L-alanine dehydrogenase activity, whereas the Hut and Put mutants contained only 7 and 4% of the histidase and proline oxidase activities, respectively, found in the wild-type strain. Rates of oxygen uptake and protein synthesis were significantly lower when the mutants were incubated in the presence of amino acids they could not degrade. Studies of L-[14C]alanine, L-[14C]histidine, and L-[14C]proline incorporation into prodigiosin synthesized by these mutants and the wild-type strain revealed that proline was incorporated intact, whereas all of alanine except the carboxyl group was incorporated into the pigment molecule. Histidine did not enter prodigiosin directly. These data suggested that the presence of unique biosynthetic pathways, independent of primary metabolism, leads to formation of prodigiosin from specific amino acids.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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