MCCC1
Function
Biotin-attachment subunit of the 3-methylcrotonyl-CoA carboxylase, an enzyme that catalyzes the conversion of 3-methylcrotonyl-CoA to 3-methylglutaconyl-CoA, a critical step for leucine and isovaleric acid catabolism.
Involvement in disease
3-methylcrotonoyl-CoA carboxylase 1 deficiency
MCC1D
An autosomal recessive disorder of leucine catabolism. The phenotype is variable, ranging from neonatal onset with severe neurological involvement to asymptomatic adults. There is a characteristic organic aciduria with massive excretion of 3-hydroxyisovaleric acid and 3-methylcrotonylglycine, usually in combination with a severe secondary carnitine deficiency.
None
The disease is caused by variants affecting the gene represented in this entry.
Pathway
Amino-acid degradation; L-leucine degradation; (S)-3-hydroxy-3-methylglutaryl-CoA from 3-isovaleryl-CoA: step 2/3.
Post-translational modifications
Acetylated.
Cellular localization
- Mitochondrion matrix
Alternative names
MCCA, MCCC1, MCCase subunit alpha, 3-methylcrotonyl-CoA carboxylase 1, 3-methylcrotonyl-CoA carboxylase biotin-containing subunit, 3-methylcrotonyl-CoA:carbon dioxide ligase subunit alpha