catalase

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Related to Catalase test: Oxidase test, coagulase test

catalase

 [kat´ah-lās]
a hemoprotein enzyme that specifically catalyzes the decomposition of hydrogen peroxide and is found in almost all cells except certain anaerobic bacteria. Deficiency results in acatalasia. adj., adj catalat´ic.

cat·a·lase

(kat'ă-lās), [MIM*115500]
A hemoprotein catalyzing the decomposition of hydrogen peroxide to water and oxygen (2H2O2 → O2 + 2H2O); a deficiency of catalase is associated with acatalasemia.

catalase

/cat·a·lase/ (kat´ah-lās) a hemoprotein enzyme that catalyzes the decomposition of hydrogen peroxide to water and oxygen, protecting cells. It is found in almost all animal cells except certain anaerobic bacteria; genetic deficiency of the enzyme results in acatalasia.catalat´ic

catalase

(kăt′l-ās′, -āz′)
n.
An enzyme found in living cells that catalyzes the decomposition of hydrogen peroxide, a potentially harmful oxidizing agent, into water and oxygen.

cat′a·lat′ic (kăt′l-ăt′ĭk) adj.

catalase

[kat′əlās]
Etymology: Gk, katalein, to dissolve
a heme enzyme, found in almost all biological cells, that catalyzes the decomposition of hydrogen peroxide to water and oxygen.

CAT

A gene on chromosome 11p13 that encodes catalase, an enzyme which plays a central role in the body’s defence against oxidative stress, converting the reactive oxygen species hydrogen peroxide (H2O2) to water and oxygen, thereby mitigating H2O2’s toxic effects.

Molecular pathology
Defects in CAT cause acatalasemia. Oxidative stress may play a role in the development of chronic or late-onset diseases—e.g., diabetes, asthma, Alzheimer's disease, systemic lupus erythematosus, rheumatoid arthritis and cancer.

cat·a·lase

(kat'ă-lās)
A hemoprotein catalyzing the decomposition of hydrogen peroxide to water and oxygen (2H2O2→ O2 + 2H2O).

catalase

An ENZYME found in the microbodies (peroxisomes) of cells and that promotes the reaction in which two molecules of hydrogen peroxide are converted to two molecules of water and one molecule of oxygen.

catalase

an iron-containing ENZYME found in tissues such as liver and potato tubers whose function is to catalyse the breakdown of toxic hydrogen peroxide, a by-product of aerobic respiration, into water and oxygen:

Catalase has the highest known TURNOVER RATE and works by reducing the ACTIVATION ENERGY required from about 80 kJ to less than 10 kJ.

catalase (kaˑ·t·las),

n an enzyme that breaks down hydrogen peroxide into water and oxygen.

catalase

a heme-containing enzyme that specifically catalyzes the decomposition of hydrogen peroxide and is found in almost all cells except certain anaerobic bacteria. The reaction can be used as a test in the identification of bacteria.
References in periodicals archive ?
The catalase test was conducted by placing one drop of 3 % hydrogen peroxide (Fisher Scientific Co.
Niacin test, catalase test and paranitrobenzoic acid (PNB) test were used to identify the isolated mycobacteria.
Then, preliminary characterization of this culture was carried using classical methods such as test of gram character, motility, Catalase test, Oxidase test, and indole production test and sugar fermentation.
Isolates were identified as GAS on the basis of p-hemolysis, Gram staining, negative catalase test result, positive pyrrolidonyl arylamidase test result, and agglutination with Lancefield group A antiserum.
tuberculosis by standard biochemical reactions (2) like Para nitro benzoic acid on LJ medium, niacin test, nitrate test, catalase test, etc.
The biochemical tests included niacin production, nitrate and tellurite reduction test, pyrazinamidase test, 68[degrees]C catalase test and semi quantitative catalase test, arylsulphatase A and B, tween 80 hydrolysis, urease test, tolerance to 5 per cent sodium chloride and iron uptake tests (12).