The protein encoded by this gene is the alpha subunit of the heterodimeric mitochondrial enzyme Propionyl-CoA carboxylase. PCCA encodes the biotin-binding region of this enzyme. Mutations in either PCCA or PCCB (encoding the beta subunit) lead to an enzyme deficiency resulting in propionic acidemia. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2010]
Forensic Context
A study in humans demonstrated that the PCCA gene is downregulated in the adipose tissue of heavier monozygotic co-twins with acquired obesity, where it is involved in mitochondrial metabolism [van der Kolk et al. DOI:10.1016/j.xcrm.2021.100226].