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Oxidase
 
 
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An oxidase is any enzyme
Enzyme

Enzymes are biomolecules that catalysis chemical reactions. Almost all enzymes are proteins. In enzymatic reactions, the molecules at the beginning of the process are called Substrate , and the enzyme converts them into different molecules, the products....
 that catalyzes an oxidation/reduction
Redox

Redox describes all chemical reactions in which atoms have their oxidation number changed.This can be either a simple redox process such as the oxidation of carbon to yield carbon dioxide or the reduction of carbon by hydrogen to yield methane , or it can be a complex process such as the oxidation of sugar in the human body through a ser...
 reaction involving molecular oxygen
Oxygen

Oxygen no O2 produced; 2) O2 produced, but absorbed in oceans & seabed rock; 3) O2 starts to gas out of the oceans, but is absorbed by land surfaces and formation of ozone layer; 4-5) O2 sinks filled and the gas accumulates]]...
 (O2) as the electron acceptor. In these reactions, oxygen is reduced to water
Water

Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam....
 (H2O) or hydrogen peroxide
Hydrogen peroxide

Hydrogen peroxide is a very pale blue liquid which appears colorless in a dilute solution, slightly more viscous than water. It is a weak acid....
 (H2O2).

The oxidase are a subclass of the oxidoreductase
Oxidoreductase

In biochemistry, an oxidoreductase is an enzyme that catalyzes the transfer of electrons from one molecule to another ....
s.

mportant example is cytochrome c oxidase
Cytochrome c oxidase

The enzyme cytochrome c oxidase or Complex IV is a large transmembrane protein complex found in bacteria and the mitochondrion.It is the last enzyme in the respiratory electron transport chain of mitochondria located in the mitochondrial membrane....
, the key enzyme that allows the body to employ oxygen in the generation of energy and the final component of the electron transfer chain.






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Encyclopedia


An oxidase is any enzyme
Enzyme

Enzymes are biomolecules that catalysis chemical reactions. Almost all enzymes are proteins. In enzymatic reactions, the molecules at the beginning of the process are called Substrate , and the enzyme converts them into different molecules, the products....
 that catalyzes an oxidation/reduction
Redox

Redox describes all chemical reactions in which atoms have their oxidation number changed.This can be either a simple redox process such as the oxidation of carbon to yield carbon dioxide or the reduction of carbon by hydrogen to yield methane , or it can be a complex process such as the oxidation of sugar in the human body through a ser...
 reaction involving molecular oxygen
Oxygen

Oxygen no O2 produced; 2) O2 produced, but absorbed in oceans & seabed rock; 3) O2 starts to gas out of the oceans, but is absorbed by land surfaces and formation of ozone layer; 4-5) O2 sinks filled and the gas accumulates]]...
 (O2) as the electron acceptor. In these reactions, oxygen is reduced to water
Water

Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam....
 (H2O) or hydrogen peroxide
Hydrogen peroxide

Hydrogen peroxide is a very pale blue liquid which appears colorless in a dilute solution, slightly more viscous than water. It is a weak acid....
 (H2O2).

The oxidase are a subclass of the oxidoreductase
Oxidoreductase

In biochemistry, an oxidoreductase is an enzyme that catalyzes the transfer of electrons from one molecule to another ....
s.

Examples

An important example is cytochrome c oxidase
Cytochrome c oxidase

The enzyme cytochrome c oxidase or Complex IV is a large transmembrane protein complex found in bacteria and the mitochondrion.It is the last enzyme in the respiratory electron transport chain of mitochondria located in the mitochondrial membrane....
, the key enzyme that allows the body to employ oxygen in the generation of energy and the final component of the electron transfer chain. Other examples are:
  • glucose oxidase
    Glucose oxidase

    The glucose oxidase enzyme binds to beta-D-glucopyranose and aids in breaking the sugar down into its metabolites. GOx is a dimeric protein that catalysts the oxidation of beta-D-glucose into Glucono delta-lactone, which then hydrolysiss to gluconic acid....
  • monoamine oxidase
    Monoamine oxidase

    Monoamine oxidases are enzymes that catalysis the oxidation of monoamines. They are found bound to the outer membrane of mitochondria in most cell types in the body....
  • cytochrome P450 oxidase
    Cytochrome P450 oxidase

    Cytochrome P450 is a very large and diverse superfamily of hemoproteins found in all domains of life. Cytochromes P450 use a plethora of both exogenous and endogenous compounds as substrates in enzymatic reactions....
  • NADPH oxidase
    NADPH oxidase

    The NADPH oxidase is a membrane-bound enzyme complex. It can be found in the plasma membrane as well as in the membrane of phagosome....
  • Xanthine oxidase
    Xanthine oxidase

    The enzyme xanthine oxidase, or XO, catalyzes the oxidation of hypoxanthine to xanthine and can further catalyze the oxidation of xanthine to uric acid....
  • L-gulonolactone oxidase
    L-gulonolactone oxidase

    L-gulonolactone oxidase is an enzyme that catalyzes the chemical reaction of D-glucuronolactone with oxygen to L-xylo-hex-3-gulonolactone and hydrogen peroxide....
  • laccase
    Laccase

    Laccases are copper-containing oxidase enzymes that are found in many plants, fungi, and microorganisms. The copper is bound in several sites; Type 1, Type 2, and/or Type 3....
  • lysyl oxidase
    Lysyl oxidase

    Lysyl oxidase also known as protein-lysine 6-oxidase is a protein which in humans is encoded by the LOX gene. Its inhibition can cause lathyrism, but at the same time, its upregulation by tumor cells may promote metastasis of the existing tumor, causing it to become malignant and cancer....


Oxidase test


In microbiology
Microbiology

Microbiology is the study of microorganisms, which are unicellular or cell-cluster microscopic organisms. This includes eukaryote such as fungi and protists, and prokaryotes, which are bacteria and archaea....
, the oxidase test
Oxidase test

The oxidase test is a test used in microbiology to determine if a bacterium produces certain cytochrome c oxidases. It uses disks impregnated with a reagent such as Wurster's blue or N,N-Dimethyl-p-phenylenediamine , which is also a redox indicator....
 is used as a phenotypic
Phenotype

A phenotype is any observable characteristic or trait_ of an organism: such as its morphology , development, biochemical or physiological properties, or behavior....
 characteristic for the identification of bacterial strains; it determines whether a given bacterium produces cytochrome oxidases (and therefore utilizes oxygen with an electron transfer chain).

External links

  • Catalase & Oxidase tests