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Information on EC 2.3.1.298 - ultra-long-chain ceramide synthase

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IUBMB Comments
Mammals have six ceramide synthases that exhibit relatively strict specificity regarding the chain-length of their acyl-CoA substrates. Ceramide synthase 3 (CERS3) is the only enzyme that is active with ultra-long-chain acyl-CoA donors (C28 or longer). It is active in the epidermis, where its products are incorporated into acylceramides. CERS3 also accepts (2R)-2-hydroxy fatty acids and omega-hydroxy fatty acids, and can accept very-long-chain acyl-CoA substrates (see EC 2.3.1.297, very-long-chain ceramide synthase). It can use multiple sphingoid bases including sphinganine, sphingosine, phytosphingosine, and (6R)-6-hydroxysphingosine.
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The enzyme appears in viruses and cellular organisms
Reaction Schemes
an ultra-long-chain fatty acyl-CoA
+
=
an ultra-long-chain ceramide
+
Synonyms
(dihydro)ceramide synthase, ceramide synthase, ceramide synthase 3, CerS3, LASS3, LASS3-long, longevity assurance homologue 3, mammalian ceramide synthase 3, phytoceramide synthase, sphingoid base N-ultra-long-chain fatty acyl-coA transferase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
an ultra-long-chain fatty acyl-CoA + a sphingoid base = an ultra-long-chain ceramide + CoA
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PATHWAY SOURCE
PATHWAYS
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