Local pH elevation mediated by the intrabacterial urease of ...
The urease produced by H. pylori has a neutral pH optimum and is irreversibly inactivated at pH lower than 4.5 (7, 8). The majority of this urease is ...
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC314326/...
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Urease - Wikipedia, the free encyclopedia
Optimum pH: 7.4; Optimum Temperature: 60 degrees Celsius ... An exceptional urease is found in Helicobacter pylori, which combines four of the regular six
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http://en.wikipedia.org/wiki/Urease...
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Regulation of Urease for Acid Habitation -- Helicobacter pylori ...
H. pylori synthesizes large quantities of a dimeric urease with optimum activity at neutral pH, which accounts for 10 to 15% of its total protein. ...
http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=hp&part=A...
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Identification of an Antigenic Epitope in Helicobacter pylori ...
Each series of nested peptides or the purified H. pylori urease antigen was diluted in 0.1 mM carbonate buffer (pH 9.6) to yield the optimal protein ...
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=10...
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How Helicobacter pylori urease may affect external pH and ...
BACKGROUND: Survival of Helicobacter pylori is dependent upon urease in ... RESULTS: H. pylori was motile between pH 5 and 8, with optimal motility at pH 5.
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http://www.ncbi.nlm.nih.gov/pubmed/12655260...
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The life and death of Helicobacter pylori
Comparison of the pH optimum of urease external to H pylori and urease in intact organisms illustrating the 10-fold activation in intact organisms seen ...
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=17...
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Genetic and biochemical analyses of Actinobacillus ...
The Km was 1.5 +/- 0.1 mM urea when it was assayed at pH 7.7. ... Chen H, Bjerknes M, Kumar R, Jay E. Determination of the optimal aligned spacing ....
Helicobacter pylori urease activity is toxic to human gastric epithelial cells.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC175631/...
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Note: Dual Functions of Streptococcus salivarius Urease
I urease expression is derepressed at low pH and is further enhanced in the presence of .... has indicated that the optimal pH for urease activity is about
pH 7.0 (4). .... Helicobacter pylori nickel-transport gene nixA: synthesis of
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http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=94...
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Energetics of Helicobacter pylori and Its Implications for the ...
A further controversial issue concerns the pH optimum of the H. pylori urease. In cell extracts diluted with citrate-phosphate buffer the enzyme exhibits a ...
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC135060/...
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Streptococcus salivarius urease: genetic and biochemical ...
In all cases, the enzyme had a Km of 3.5 to 4.1 mM, a pH optimum near 7.0, .... Mobley HL, Garner RM, Bauerfeind P. Helicobacter pylori nickel-transport ...
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=17...
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