title: Transport of tricarboxylic acids in Salmonella typhimurium.
abstract: Salmonella typhimurium possesses at least three inducible transport systems for the tricarboxylic acids (citric, isocitric, cis-aconitic, and tricarballylic). The first system was induced by citrate, isocitrate, or cis-aconitate, and transported citric acid and isocitric acid. The second system was also induced by the same acids as in the first system and transported cis-aconitic acid. This system required Mg(2+) ions and was stable at pH 8.4 but unstable at pH 7.0. The metal ion was replaced with Sr(2+) or Ca(2+) ions but not with Ba(2+) ions. The third system was induced by tricarballylate and transported citric acid, cis-aconitic acid, and tricarballylic acid.
mesh_terms: D031841:Aconitum / Q000378:metabolism; D001692:Biological Transport; D002951:Citrates / Q000378:metabolism; D003470:Culture Media; D005650:Fumarates / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007523:Isocitrates / Q000378:metabolism; D008274:Magnesium / Q000378:metabolism; D008293:Malates / Q000378:metabolism; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D012486:Salmonella typhimurium / Q000378:metabolism*; D013386:Succinates / Q000378:metabolism; D013997:Time Factors; D014233:Tricarboxylic Acids / Q000378:metabolism*
chemical_list: D002951:Citrates; D003470:Culture Media; D005650:Fumarates; D007523:Isocitrates; D008293:Malates; D013386:Succinates; D014233:Tricarboxylic Acids; D008274:Magnesium