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 ?
In the present research, an attempt has been made to isolate and identify catalase producing extremophilic, in terms of pH and temperature, microbial flora of hot springs of Tatta Pani, Azad Kashmir, Pakistan.
Linkage map of the short arm of human chromosome 11: location of the genes for catalase, calcitonin, and insulin-like growth factor II.
The mutant KatG L19 had catalase activity 11% lower than the KatG wt
What accounts for this study is the function and responsibility of the 2 enzymes: glutathione reductase and catalase which are essential for many physiological responses of the body (7).
Superoxide radical inhibited catalase and this inhibition could be prevented by SOD.
Among the various enzymes that act in this system, catalases (CAT), ascorbate peroxidase (APX) and superoxide dismutases (SODs) stand out (Miller et al.
Increasing levels of ROS due to enhancing of UV trigger the activity of several antioxidant enzymes such as superoxide dismutase, catalase and peroxidase [44].
Reducing the moisture in the seeds did not change the profiles of the [alpha]-amylase, catalase, esterase or peroxidase isoenyzmes.
Methods for catalase activity quantitative determination are based on the estimation of enzyme-cleaved hydrogen peroxide quantity when enzymatic activity is assessed by the catalase index.
Tests for serum uric acid, serum malondialdehyde (MDA), erythrocyte superoxide dismutase (SOD), and erythrocyte catalase were conducted.