catalase


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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 lowest value of catalase activity belonged to 30 min dry-treatment (Table2, Figure3).
Catalase activities of WT and hyperproducers significantly decreased post-irradiation.
MDA, SOD and catalase levels in the testicular tissue were evaluated in different groups of rats (Table 1).
01) was determined between MDA and catalase in group A cows (Figure 1), while negative correlation (r = -0.
Table 2 shows the results of the levels of catalase and peroxidase in control, G I and G II plants of vigna mungo.
Blood samples were taken from all participants at the end of the study period for an assay of serum SOD and catalase levels.
Catalase and glutathione peroxidase assays: Catalase and glutathione peroxidise activity in the RBCs were determined by spectrophotometric method (24,25).
Among these 23 isolates, only 4 isolates showed a positive catalase reaction and the remaining 19 were catalase negative (Table 2).
The catalase activities, lipid peroxidation, cholesterol and triglyceride concentrations in the liver and kidney of rats were determined.
Origin of serum catalase activity in acute pancreatitis.