Record Information
Version1.0
StatusDetected and Quantified
Creation Date2020-12-10 18:51:29 UTC
Update Date2024-04-30 19:33:21 UTC
Metabolite IDMMDBc0000629
Metabolite Identification
Common NameSM(d18:0/16:0)
DescriptionSphingomyelin (d18:0/16:0) or SM(d18:0/16:0) is a type of sphingolipid found in animal cell membranes, especially in the membranous myelin sheath which surrounds some nerve cell axons. It usually consists of phosphorylcholine and ceramide. SM(d18:0/16:0) consists of a sphinganine backbone and a palmitic acid chain. In humans, sphingomyelin is the only membrane phospholipid not derived from glycerol. Like all sphingolipids, SM has a ceramide core (sphingosine bonded to a fatty acid via an amide linkage). In addition, it contains one polar head group, which is either phosphocholine or phosphoethanolamine. The plasma membrane of cells is highly enriched in sphingomyelin and is considered largely to be found in the exoplasmic leaflet of the cell membrane. However, there is some evidence that there may also be a sphingomyelin pool in the inner leaflet of the membrane. Moreover, neutral sphingomyelinase-2, an enzyme that breaks down sphingomyelin into ceramide, has been found to localize exclusively to the inner leaflet further suggesting that there may be sphingomyelin present there. Sphingomyelin can accumulate in a rare hereditary disease called Niemann-Pick Disease, types A and B. Niemann-Pick disease is a genetically-inherited disease caused by a deficiency in the enzyme sphingomyelinase, which causes the accumulation of sphingomyelin in spleen, liver, lungs, bone marrow, and the brain, causing irreversible neurological damage. SMs play a role in signal transduction. Sphingomyelins are synthesized by the transfer of phosphorylcholine from phosphatidylcholine to a ceramide in a reaction catalyzed by sphingomyelin synthase.
Structure
Synonyms
ValueSource
(2S,3R)-3-Hydroxy-2-(palmitoylamino)octadecyl 2-(trimethylazaniumyl)ethyl phosphateHMDB, ChEBI
(2S,3R)-3-Hydroxy-2-(palmitoylamino)octadecyl 2-(trimethylazaniumyl)ethyl phosphoric acidHMDB, Generator
C16 DihydrosphingomyelinHMDB, ChEBI
N-(Hexadecanoyl)-sphinganine-1-phosphocholineHMDB, ChEBI
N-Hexadecanoyl-sphinganine-1-phosphocholineHMDB, ChEBI
N-Hexadecanoyldihydroceramide-1-phosphocholineHMDB, ChEBI
N-Palmitoyldihydroceramide-1-phosphocholineHMDB, ChEBI
N-Palmitoylsphinganine-1-phosphocholineHMDB, ChEBI
Palmitoyl dihydrosphingomyelinHMDB, ChEBI
Palmitoyl dihydrosphingomyelin (d18:0/16:0)HMDB, ChEBI
SM(18:0/16:0)HMDB, ChEBI
SM(d18:0/16:0)HMDB, ChEBI
Sphingomyelin (d18:0/16:0)HMDB, ChEBI
{[(2S,3R)-2-hexadecanamido-3-hydroxyoctadecyl]oxy}[2-(trimethylazaniumyl)ethoxy]phosphinateHMDB, Generator
{[(2S,3R)-2-hexadecanamido-3-hydroxyoctadecyl]oxy}[2-(trimethylazaniumyl)ethoxy]phosphinic acidHMDB, ChEBI
N-PalmitoyldihydrosphingomyelinHMDB
PalmitoyldihydrosphingomyelinHMDB
SphingomyelinMetBuilder
N-(Hexadecanoyl)-1-phosphocholine-sphinganineMetBuilder
Sphingomyelin(d18:0/16:0)MetBuilder
N-(Hexadecanoyl)-1-phosphocholine-dihydrosphingosineMetBuilder
N-(Hexadecanoyl)-1-phosphocholine-D-erythro-sphinganineMetBuilder
16:0 DihydrosphingomyelinHMDB
C16-DihydrosphingomyelinHMDB
Dihydrosphingomyelin C16:0HMDB
SM d18:0/16:0HMDB
Sphingomyelin (d18:0,C16:0)HMDB
Molecular FormulaC39H81N2O6P
Average Mass705.059
Monoisotopic Mass704.583225334
IUPAC Name(2-{[(2S,3R)-2-hexadecanamido-3-hydroxyoctadecyl phosphono]oxy}ethyl)trimethylazanium
Traditional Name(2-{[(2S,3R)-2-hexadecanamido-3-hydroxyoctadecyl phosphono]oxy}ethyl)trimethylazanium
CAS Registry NumberNot Available
SMILES
[H][C@@](COP([O-])(=O)OCC[N+](C)(C)C)(NC(=O)CCCCCCCCCCCCCCC)[C@H](O)CCCCCCCCCCCCCCC
InChI Identifier
InChI=1S/C39H81N2O6P/c1-6-8-10-12-14-16-18-20-22-24-26-28-30-32-38(42)37(36-47-48(44,45)46-35-34-41(3,4)5)40-39(43)33-31-29-27-25-23-21-19-17-15-13-11-9-7-2/h37-38,42H,6-36H2,1-5H3,(H-,40,43,44,45)/t37-,38+/m0/s1
InChI KeyQHZIGNLCLJPLCU-QPPIDDCLSA-N