Methylmalonate semialdehyde dehydrogenase (MMSDH) deficiency is a rare autosomal recessive disorder with varied metabolite abnormalities, including accumulation of 3-hydroxyisobutyric, 3-hydroxypropionic, and methylmalonic acids, as well as beta-alanine. Reported clinical presentations vary from a mild or uneventful clinical course. Severe developmental delay may be present. Dysmorphic facial features and congenital brain dysgenesis with intracerebral calcifications have also been described. Mutations in the ALDH6A1 gene coding for MMSDH are associated with this disease.
Category
Inherited metabolic disorder
Brite
Human diseases in ICD-11 classification [BR:br08403]
05 Endocrine, nutritional or metabolic diseases
Metabolic disorders
Inborn errors of metabolism
5C50 Inborn errors of amino acid or other organic acid metabolism
H02285 Methylmalonate semialdehyde dehydrogenase deficiency
Pathway-based classification of diseases [BR:br08402]
Amino acid metabolism
nt06024 Valine, leucine and isoleucine degradation
H02285 Methylmalonate semialdehyde dehydrogenase deficiency
