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cholera/phosphatase
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Changes in intestinal alkaline phosphatase activity in cholera toxin-treated rats.
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It is conceivable that brush border enzyme activities of the intestinal mucosa will change when bacterial toxins are exposed to the intestinal microvillous membranes. The effect of cholera toxin on the activity of intestinal alkaline phosphatase in rats was therefore determined in the intestinal
Alkaline phosphatases and adenylate cyclase in the normal and desensitized rat small intestine after acute cholera toxin challenge: a histochemical study.
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The effect of cholera toxin (CT)-challenge on histochemically demonstrable activities of adenylatecyclase and alkaline phosphatase was investigated in rat small intestine, using an intestinal loop model. CT-challenge increased the activities of adenylatecyclase and alkaline phosphatases within 15
Atomic resolution crystal structure of VcLMWPTP-1 from Vibrio cholerae O395: insights into a novel mode of dimerization in the low molecular weight protein tyrosine phosphatase family.
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Low molecular weight protein tyrosine phosphatase (LMWPTP) is a group of phosphotyrosine phosphatase ubiquitously found in a wide range of organisms ranging from bacteria to mammals. Dimerization in the LMWPTP family has been reported earlier which follows a common mechanism involving active site
Regulation of the transmodulated epidermal growth factor receptor by cholera toxin and the protein phosphatase inhibitor okadaic acid.
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Addition of tumor promoting phorbol esters, such as phorbol 12-myristate 13-acetate (PMA), to many cell lines results in a decrease of 125I-epidermal growth factor (EGF) binding and increased serine/threonine phosphorylation of the EGF receptor in a process termed transmodulation. It is, however,
Effects of cholera enterotoxin, glucagon, and dibutyryl cyclic AMP on rat liver alkaline phosphatase, bile flow, and bile composition.
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Cholera enterotoxin, 45 mug per 250 g body weight, administered intravenously to rats, caused a 6-fold rise in the activity of liver alkaline phosphatase in 12 hr. There was no change in bile volume or in the concentration or total bile content of Na+, K+, HCO3-, or Cl- for 36 hr after the
Alkaline phosphatase. Possible induction by cyclic AMP after cholera enterotoxin administration.
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The present studies were undertaken to determine the role, if any, of cyclic 3',5'-adenosine monophosphate (cyclic AMP) as a chemical inducer of rat liver alkaline phosphatase. Cholera enterotoxin, given intravenously to rats, led to a rapid rise in the activity of hepatic adenyl cyclase that was
Identification of the gene for the monomeric alkaline phosphatase of Vibrio cholerae serogroup O1 strain.
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Alkaline phosphatase (APase) of Vibrio cholerae is the first monomeric alkaline phosphatase reported [Roy, N.K., Ghosh, R.K., Das, J., 1982a. Monomeric alkaline phosphatase of V. cholerae. J. Bacteriol. 150, 1033-1039.]. The gene (phoA(VC)) encoding this enzyme is not identified in the published
Metabolic reactions responsible for glucose stimulation of alkaline phosphatase in Vibrio cholerae.
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Alkaline phosphatase activity in Vibrio cholerae strain 569B grown in low-phosphate medium was stimulated if glucose or glycerol was used as the carbon source. No such stimulation was observed, however, if tricarboxylic acid cycle intermediates like succinate or citrate were used. Experiments using
Repression of the alkaline phosphatase of Vibrio cholerae.
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The synthesis of alkaline phosphatase by two strains of Vibrio cholerae belonging to the Inaba and Ogawa serotypes has been examined in relation to the phosphate concentration of the culture medium. The synthesis of the enzyme in both strains was repressed in cells grown in the presence of a high
Cloning, purification, crystallization and preliminary X-ray analysis of two low-molecular-weight protein tyrosine phosphatases from Vibrio cholerae.
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Low-molecular-weight protein tyrosine phosphatases (LMWPTPs) are small cytoplasmic enzymes of molecular weight ∼18 kDa that belong to the large family of protein tyrosine phosphatases (PTPs). Despite their wide distribution in both prokaryotes and eukaryotes, their exact biological role in bacterial
Comparative effectiveness of the cholera toxin B subunit and alkaline phosphatase as carriers for oral vaccines.
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The purpose of this study was to determine whether the B subunit of cholera toxin (CtxB) has adjuvant activity over and above serving as a carrier protein for orally administered vaccines. An oligonucleotide that encodes an antigenic determinant (GtfB.1) from the glucosyltransferase B gene (gtfB) of
Vibrio cholerae phosphatases required for the utilization of nucleotides and extracellular DNA as phosphate sources.
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Phosphate is essential for life, being used in many core processes such as signal transduction and synthesis of nucleic acids. The waterborne agent of cholera, Vibrio cholerae, encounters phosphate limitation in both the aquatic environment and human intestinal tract. This bacterium can utilize
Monomeric alkaline phosphatase of Vibrio cholerae.
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Alkaline phosphatase has been purified to homogeneity from two strains of Vibrio cholerae. The enzymes from both strains are single polypeptides of molecular weight 60,000. Both of the enzymes have pH optima around 8.0 and can act on a variety of organic phosphate esters, glucose-1-phosphate being
[Effect of cholera toxin on secretion and biosynthesis of intestinal alkaline phosphatase in rat].
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[The role of intestinal alkaline phosphatase in cholera toxin-induced secretory diarrhea].
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