x

Search for a rare disease

* (*) mandatory field

Other search option(s)

Suggest an update

(*) Required fields.

Attention

Only comments seeking to improve the quality and accuracy of information on the Orphanet website are accepted. For all other comments, please send your remarks via contact us. Only comments written in English can be processed.

Captcha image

2-methylbutyryl-CoA dehydrogenase deficiency

Disease definition

2-Methylbutyryl-CoA dehydrogenase (or Short/branched-chain acyl-coA dehydrogenase; SBCAD) deficiency is characterized by increased urinary excretion of 2-methylbutyrylglycine, and increased whole blood and plasma concentrations of 2-methylbutyryl (C5) carnitine. It has been described in less than 30 patients, mostly from the Hmong population, an ethnic group of Chinese origin. The phenotype is not well defined, ranging from completely asymptomatic patients to those with muscle hypotonia, cerebral palsy, developmental delay, lethargy, hypoglycemia, and metabolic acidosis. The disorder is transmitted as an autosomal recessive trait. The SBCAD enzyme catalyzes the conversion of 2-methylbutyryl-CoA to tiglyl-CoA in the isoleucine catabolic pathway. Mutations in the SBCAD gene (located on chromosome 10q25-26) have been reported in affected patients. Treatment includes carnitine supplementation and a low-protein diet.

ORPHA:79157

  • Synonym(s):
    • 2-methylbutyric aciduria
    • Developmental delay due to 2-methylbutyryl-CoA dehydrogenase deficiency
    • SBCAD deficiency
    • Short/branched-chain acyl-coA dehydrogenase deficiency
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: E71.1
  • OMIM: 610006
  • UMLS: C1864912
  • MeSH: -
  • GARD: 10322
  • MedDRA: -

Additional information

Specialised Social Services

The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care by a qualified specialist and should not be used as a basis for diagnosis or treatment.