2-oxoisovalerate dehydrogenase (acylating)

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2-oxoisovalerate dehydrogenase (acylating)
Identifiers
EC no. 1.2.1.25
CAS no. 37211-61-3
Databases
IntEnz IntEnz view
BRENDA BRENDA entry
ExPASy NiceZyme view
KEGG KEGG entry
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / QuickGO
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PMC articles
PubMed articles
NCBI proteins

In enzymology, 2-oxoisovalerate dehydrogenase (acylating) (EC 1.2.1.25) is an enzyme that catalyzes the chemical reaction

+ CoA + NAD+
 
 
 
CO2 + H+
2-oxoisovalerate dehydrogenase (acylating)
 
CO2 + H+
 
2-Methylpropionyl-CoA.svg
Isobutyryl-CoA
+ NADH
 

The three substrates of this enzyme are α-ketoisovaleric acid, coenzyme A (CoA), and oxidised nicotinamide adenine dinucleotide (NAD+). Its products are isobutyryl-CoA, carbon dioxide, reduced NADH and a proton. [1] [2]

This enzyme belongs to the family of oxidoreductases, specifically those acting on the aldehyde or oxo group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is 3-methyl-2-oxobutanoate:NAD+ 2-oxidoreductase (CoA-methyl-propanoylating). Other names in common use include 2-oxoisovalerate dehydrogenase, and alpha-ketoisovalerate dehydrogenase. This enzyme participates in valine, leucine and isoleucine degradation.

References

  1. Enzyme 1.2.1.25 at KEGG Pathway Database.
  2. Namba Y, Yoshizawa K, Ejima A, Hayashi T, Kaneda T (1969). "Coenzyme A- and nicotinamide adenine dinucleotide-dependent branched chain alpha-keto acid dehydrogenase. I. Purification and properties of the enzyme from Bacillus subtilis". J. Biol. Chem. 244 (16): 4437–47. doi: 10.1016/S0021-9258(18)94337-1 . PMID   4308861.