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SAE0044

Sigma-Aldrich

Choline Oxidase from Arthrobacter sp.

recombinant, expressed in E. coli ≥12 units/mg protein

Sinonimo/i:

COD, COX, ChOx, Choline: oxygen 1-oxidoreductase

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About This Item

Classificazione EC (Enzyme Commission):
1.1.3.17 (BRENDA, IUBMB)
Codice UNSPSC:
12352204

Origine biologica

bacterial (arthrobacter sp.)

Livello qualitativo

200

Ricombinante

expressed in E. coli ≥12 units/mg protein

Forma fisica

powder

Attività specifica

≥12 units/mg protein

Condizioni di stoccaggio

(Tightly closed.Dry. Keep locked up or in an area accessible only to qualified or authorized
persons)

tecniche

activity assay: suitable

N° accesso UniProt

A0A0Q9NRQ3
A0A0Q9PH20

Temperatura di conservazione

−20°C

Descrizione generale

Research area: Cell Signaling

Choline oxidase from Arthrobacter sp. is a flavoprotein, which is a member of the glucose–methanol–choline (GMC). The codA gene encodes the choline oxidase enzyme.

Applicazioni

Choline oxidase from Arthrobacter sp. has been used in the enzymatic determination of choline in milk using a flow injection analysis (FIA) system with potentiometric detection. It has been used for fluorescent detection of choline released during autotaxin (ATX) activity in conditioned media and plasma.

Azioni biochim/fisiol

Choline oxidase from Arthrobacter sp. is a flavoprotein, which is a member of the GMC-oxidoreductase family. The enzyme catalyzes the four-electron-oxidation of choline to glycine betaine via the intermediate betaine aldehyde, in two sequential FAD-dependent reaction steps. The enzyme is useful for enzymatic determination of phosphatidylcholine by coupling with phospholipase D or determination of sphingomyelin by coupling with sphingomyelinase and for cholinesterase activity assays.Choline oxidase (COD) mediating glycine betaine biosynthetic pathway plays a vital role in creating stress resistant transgenic plants.

Definizione di unità

One unit will form 1 μmole of H2O2 with oxidation of 1 μmole of choline to betaine aldehyde per min at pH 8.0 at 37 °C. Note: During the conversion of choline to betaine by choline oxidase, 2 μmoles of H2O2 are produced for every μmole of choline.

Nota sulla preparazione

It is recommended to reconstitute choline oxidase in phosphate buffer at pH 7.5 supplemented with 10mM EDTA. Reconstituted material can be stored at 2-8 °C for at least 2 weeks.

Pittogrammi

Health hazard
GHS08

Avvertenze

Danger

Indicazioni di pericolo

H334 - H412

Classi di pericolo

Aquatic Chronic 3 - Resp. Sens. 1

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Certificati d'analisi (COA)

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Transformation of Synechococcus with a gene for choline oxidase enhances tolerance to salt stress.
Deshnium P, et al.
Plant Molecular Biology, 29(5), 897-907 (1995)
New enzymatic assay of cholinesterase activity
Okabe, H. et al.,
Clinica Chimica Acta; International Journal of Clinical Chemistry, 80, 87-94 (1977)
Rapid, specific, and sensitive measurements of plasma sphingomyelin and phosphatidylcholine.
Hojjati M.R., and Jiang X.C.
Journal of Lipid Research, 47, 673-676 (2006)
Transformation of Arabidopsis thaliana with the codA gene for choline oxidase; accumulation of glycinebetaine and enhanced tolerance to salt and cold stress.
Hayashi H, et al.
The Plant Journal, 12(1), 133-142 (1997)
J L Lima et al.
The Analyst, 125(7), 1281-1284 (2000-09-14)
The development of a FIA system for the determination of total choline content in several types of milk is described. The samples were submitted to hydrochloric acid digestion before injection into the system and passed through an enzymatic reactor containing
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