Medical Subject Headings

Last uploaded: March 22, 2026
Id http://purl.bioontology.org/ontology/MESH/D028922
http://purl.bioontology.org/ontology/MESH/D028922
Preferred Name

Holocarboxylase Synthetase Deficiency

Definitions
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).
Synonyms
Carboxylase Deficiency, Multiple, Neonatal Form
Holocarboxylase Synthetase Deficiencies
Early Onset Biotin Responsive Multiple Carboxylase Deficiency
Deficiency, HLCS
Deficiencies, Holocarboxylase Synthetase
Deficiency, Holocarboxylase Synthetase
HLCS Deficiencies
Deficiency, Multiple Carboxylase, Neonatal Form
Early-Onset Biotin-Responsive Multiple Carboxylase Deficiency
Early Onset Combined Carboxylase Deficiency
Multiple Carboxylase Deficiency, Early Onset
Multiple Carboxylase Deficiency, Neonatal Form
Deficiencies, HLCS
HLCS Deficiency
Early-Onset Combined Carboxylase Deficiency
Infantile Multiple Carboxylase Deficiency
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Type http://www.w3.org/2002/07/owl#Class
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