Canadian Medical Guide > Diseases > Congenital, Hereditary, and Neonatal Diseases and Abnormalities > Genetic Diseases, Inborn > Metabolism, Inborn Errors > Amino Acid Metabolism, Inborn Errors > Multiple Carboxylase Deficiency Terms and Definitions




Multiple Carboxylase Deficiency

Medical Definition: A deficiency in the activities of biotin-dependent enzymes (propionyl-CoA carboxylase, methylcrotonyl-CoA carboxylase, and PYRUVATE CARBOXYLASE) due to one of two defects in BIOTIN metabolism. The neonatal form is due to HOLOCARBOXYLASE SYNTHETASE DEFICIENCY. The late-onset form is due to BIOTINIDASE DEFICIENCY.
Previously Indexed: specific enzyme (1966-1974),specific enzyme/deficiency (1975-1986)
Multiple Carboxylase Deficiency Categories.
Canadian Medical Guide Definition Biotinidase Deficiency - The late onset form of MULTIPLE CARBOXYLASE DEFICIENCY (deficiency of the activities of biotin-dependent enzymes propionyl-CoA carboxylase, methylcrotonyl-CoA carboxylase, and PYRUVATE CARBOXYLASE) due to a defect or deficiency in biotinidase which is essential for recycling BIOTIN.
Canadian Medical Guide Definition Holocarboxylase Synthetase Deficiency - The neonatal form of MULTIPLE CARBOXYLASE DEFICIENCY that is caused by a defect or deficiency in holocarboxylase synthetase. HLCS is the enzyme that covalently links biotin to the biotin dependent carboxylases (propionyl-CoA-carboxylase, pyruvate carboxylase, and beta-methylcrotonyl-CoA carboxylase).

Multiple Carboxylase Deficiency Medical Definitions and Terms

CANADIAN MEDICAL GUIDE

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