IUBMB Enzyme Nomenclature


Accepted name: sphingoid base N-palmitoyltransferase

Reaction: palmitoyl-CoA + a sphingoid base = an N-(palmitoyl)-sphingoid base + CoA

Other name(s): mammalian ceramide synthase 5; CERS5 (gene name); LASS5 (gene name)

Systematic name: palmitoyl-CoA:sphingoid base N-palmitoyltransferase

Comments: Mammals have six ceramide synthases that exhibit relatively strict specificity regarding the chain-length of their acyl-CoA substrates. Ceramide synthase 5 (CERS5) is specific for palmitoyl-CoA as the acyl donor. It can use multiple sphingoid bases including sphinganine, sphingosine, and phytosphingosine.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number:


1. Lahiri, S. and Futerman, A.H. LASS5 is a bona fide dihydroceramide synthase that selectively utilizes palmitoyl-CoA as acyl donor. J. Biol. Chem 280 (2005) 33735-33738. [PMID: 16100120]

2. Xu, Z., Zhou, J., McCoy, D.M. and Mallampalli, R.K. LASS5 is the predominant ceramide synthase isoform involved in de novo sphingolipid synthesis in lung epithelia. J. Lipid Res. 46 (2005) 1229-1238. [PMID: 15772421]

3. Mizutani, Y., Kihara, A. and Igarashi, Y. Mammalian Lass6 and its related family members regulate synthesis of specific ceramides. Biochem. J. 390 (2005) 263-271. [PMID: 15823095]

[EC created 2019, modified 2019]

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