Induction of the histidine decarboxylase genes ofPhotobacterium damselaesubsp.damselae(formallyP. histaminum) at low pH
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Putrescine and Acid Stress : Induction of Arginine Decarboxylase Activity and Putrescine Accumulation by Low pH.
Incubation of peeled oat Avena sativa L. var Victory leaf segments on media of pH 5.0 or below leads to a rapid and massive increase in the titer of putrescine while incubation at pH values above 5.0 causes little or no change. The low pH effect is independent of the buffer system employed. Putrescine levels rise within 3 hours and reach their peak 8 to 9 hours after acidification. At this time...
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Histamine is a biogenic amine, which is involved in a variety of biologic processes comprising inflammation, allergic responses, neurotransmission and regulation of gastric acid secretion. The key enzyme for the generation of histamine is histidine decarboxylase (HDC), which converts the amino acid L-histidine to histamine. In this article, we review the history, biochemistry and molecular biol...
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With a modification of Taylor's decarboxylation broth, histidine decarboxylase was detected in Enterobacter aerogenes, Morganella morganii, Raoultella ornithinolytica, and some strains of Citrobacter youngae and Raoultella planticola. This method provides a useful confirmatory test for identification of E. aerogenes strains.
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During the latter part of pregnancy, the foetal rat produces large quantities of histamine which may be concerned with the growth of the foetus (Kahlson and Rosengren, 1959). Kahlson (1960) reported increased formation of histamine by the human foetus as well: recently Davis (1961) suggested that the antagonism of such excess histamine might account for the beneficial effect of an antihistamine...
متن کاملA Rapid Histidine Decarboxylase Assay1
Histidine decarboxylase (EC 4.1.1.22) catalyzes the conversion of histidine to histamine. Because current assays for enzyme activity are time consuming and require additional enzymes or large amounts of tissue, a rapid radioisotopic assay was devised. Using commercially available radioactive histidine (without additional purification), the enzyme mediates the formation of histamine. The product...
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ژورنال
عنوان ژورنال: Journal of Applied Microbiology
سال: 2009
ISSN: 1364-5072,1365-2672
DOI: 10.1111/j.1365-2672.2009.04223.x