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choline dehydrogenase
Identifiers
EC number 1.1.99.1
CAS number 9028-67-5
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures
Gene Ontology AmiGO / EGO

In enzymology, a choline dehydrogenase (EC 1.1.99.1) is an enzyme that catalyzes the chemical reaction

choline + acceptor \rightleftharpoons betaine aldehyde + reduced acceptor

Thus, the two substrates of this enzyme are choline and acceptor, whereas its two products are betaine aldehyde and reduced acceptor.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with other acceptors. The systematic name of this enzyme class is choline:acceptor 1-oxidoreductase. Other names in common use include choline oxidase, choline-cytochrome c reductase, choline:(acceptor) oxidoreductase, and choline:(acceptor) 1-oxidoreductase. This enzyme participates in glycine, serine and threonine metabolism. It employs one cofactor, PQQ.

References

  • K and Adachi O (1985). "Mammalian choline dehydrogenase is a quinoprotein". Agric. Biol. Chem. 49: 3623–3626.  
  • EBISUZAKI K, WILLIAMS JN Jr (1955). "Preparation and partial purification of soluble choline dehydrogenase from liver mitochondria". Biochem. J. 60: 644–6. PMID 13249959.  
  • Gadda G, McAllister-Wilkins EE (2003). "Cloning, expression, and purification of choline dehydrogenase from the moderate halophile Halomonas elongata". Appl. Environ. Microbiol. 69: 2126–32. doi:10.1128/AEM.69.4.2126-2132.2003. PMID 12676692.  
  • Takabe T (2003). "Isolation and functional characterization of N-methyltransferases that catalyze betaine synthesis from glycine in a halotolerant photosynthetic organism Aphanothece halophytica". J. Biol. Chem. 278: 4932–42. doi:10.1074/jbc.M210970200. PMID 12466265.  
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