The function of Ensembl gene identifier ENSG00000159267 (HLCS, holocarboxylase synthetase) is as follows. Biotin--protein ligase catalyzing the biotinylation of the 4 biotin-dependent carboxylases acetyl-CoA-carboxylase, pyruvate carboxylase, propionyl-CoA carboxylase, and methylcrotonyl-CoA carboxylase. {ECO:0000269|PubMed:10590022, ECO:0000269|PubMed:7753853, ECO:0000269|PubMed:7842009}.