Carbamyl phosphate and citrulline formation by phototrophic bacteria

Khramov, V.A.; Kondrat'eva, E.N.

Mikrobiologiia 50(5): 932-934

1981


ISSN/ISBN: 0026-3656
PMID: 6798373
Document Number: 171581
The purple bacteria Ectothiorhodospira shaposhnikovii and Rhodospirillum rubrum are capable of synthesizing citrulline in the presence of ammonium hydrocarbonate, ornithine, ATP and Mg2+ ions. Citrulline biosynthesis by these phototrophic bacteria is presumed to be catalysed by carbamate kinase and ornithine transcarbamoylase. Therefore, certain phototrophic bacteria can assimilate carbon dioxide and ammonia for biosynthesis of amino acids, in particular, citrulline and, apparently, arginine.

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