MMAA

Methylmalonic aciduria type A protein, mitochondrial also known as MMAA is a protein that in humans is encoded by the "MMAA" gene.
Function.
The protein encoded by this gene is involved in the translocation of cobalamin into the mitochondrion, where it is used in the final steps of adenosylcobalamin synthesis. Adenosylcobalamin is a coenzyme required for the activity of methylmalonyl-CoA mutase.
Clinical significance.
Mutations in the "MMAA" gene are associated with methylmalonic acidemia.