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Record Information
Version3.6
Creation Date2006-08-13 06:55:06 UTC
Update Date2016-02-11 01:06:27 UTC
HMDB IDHMDB03896
Secondary Accession NumbersNone
Metabolite Identification
Common Name7-Dehydrodesmosterol
Description7-Dehydrodesmosterol is a sterol intermediate in the biosynthesis of steroids. 7-Dehydrodesmosterol is a substrate of the enzyme 24-dehydrocholesterol reductase (EC:1.3.1.72), an important enzyme in the biosynthesis of Cholesterol. Cholesterol is synthesized from either Lathosterol, 7-Dehydrocholesterol, Desmosterol or Cholestenol by the enzyme 3beta-hydroxysterol delta7 reductase (EC 1.3.1.21, Dhcr7). The Smith-Lemli-Opitz syndrome (SLOS, OMIM 270400 ) is caused by a genetic defect in cholesterol biosynthesis; mutations in the enzyme 3beta-hydroxysterol delta7 reductase lead to a failure of cholesterol synthesis, with an accumulation of precursor sterols, such as 7-Dehydrodesmosterol. SLOS results in craniofacial, limb as well as major organ defects, including the brain. In individuals with this syndrome, mental retardation, as well as other CNS dysfunction, is almost 100% prevalent. (PMID: 15862627 , 17197219 ).
Structure
Thumb
Synonyms
ValueSource
24-Dehydroprovitamin D3ChEBI
Cholesta-5,7,24-trien-3beta-olChEBI
Cholesta-5,7,24-triene-3beta-olChEBI
Cholesta-5,7,24-trien-3b-olGenerator
Cholesta-5,7,24-trien-3β-olGenerator
Cholesta-5,7,24-triene-3b-olGenerator
Cholesta-5,7,24-triene-3β-olGenerator
Chemical FormulaC27H42O
Average Molecular Weight382.6218
Monoisotopic Molecular Weight382.323565966
IUPAC Name(1S,2R,5S,11R,14R,15R)-2,15-dimethyl-14-[(2R)-6-methylhept-5-en-2-yl]tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadeca-7,9-dien-5-ol
Traditional Name7-dehydrodesmosterol
CAS Registry Number1715-86-2
SMILES
[H][C@@]1(CC[C@@]2([H])C3=CC=C4C[C@@H](O)CC[C@]4(C)[C@@]3([H])CC[C@]12C)[C@H](C)CCC=C(C)C
InChI Identifier
InChI=1S/C27H42O/c1-18(2)7-6-8-19(3)23-11-12-24-22-10-9-20-17-21(28)13-15-26(20,4)25(22)14-16-27(23,24)5/h7,9-10,19,21,23-25,28H,6,8,11-17H2,1-5H3/t19-,21+,23-,24+,25+,26+,27-/m1/s1
InChI KeyInChIKey=RUSSPKPUXDSHNC-DDPQNLDTSA-N
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as cholesterols and derivatives. These are compounds containing a 3-hydroxylated cholestane core.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassSteroids and steroid derivatives
Sub ClassCholestane steroids
Direct ParentCholesterols and derivatives
Alternative Parents
Substituents
  • Cholesterol-skeleton
  • Cholesterol
  • 3-beta-hydroxy-delta-7-steroid
  • 3-beta-hydroxysteroid
  • 3-beta-hydroxy-delta-5-steroid
  • Hydroxysteroid
  • 3-hydroxysteroid
  • 3-hydroxy-delta-7-steroid
  • 3-hydroxy-delta-5-steroid
  • Delta-7-steroid
  • Delta-5-steroid
  • Cyclic alcohol
  • Secondary alcohol
  • Hydrocarbon derivative
  • Organooxygen compound
  • Alcohol
  • Aliphatic homopolycyclic compound
Molecular FrameworkAliphatic homopolycyclic compounds
External Descriptors
Ontology
StatusExpected but not Quantified
Origin
  • Endogenous
  • Food
Biofunction
  • Cell signaling
  • Fuel and energy storage
  • Fuel or energy source
  • Hormones, Membrane component
  • Membrane integrity/stability
Application
  • Nutrients
  • Stabilizers
  • Surfactants and Emulsifiers
Cellular locations
  • Extracellular
  • Membrane
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogP6.101Not Available
Predicted Properties
PropertyValueSource
Water Solubility0.00064 mg/mLALOGPS
logP7.46ALOGPS
logP6.3ChemAxon
logS-5.8ALOGPS
pKa (Strongest Acidic)18.27ChemAxon
pKa (Strongest Basic)-1.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count1ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area20.23 Å2ChemAxon
Rotatable Bond Count4ChemAxon
Refractivity122.32 m3·mol-1ChemAxon
Polarizability48.9 Å3ChemAxon
Number of Rings4ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
SpectraNot Available
Biological Properties
Cellular Locations
  • Extracellular
  • Membrane
Biofluid LocationsNot Available
Tissue LocationNot Available
Pathways
NameSMPDB LinkKEGG Link
Alendronate pathwaySMP00095Not Available
Atorvastatin PathwaySMP00131Not Available
Cerivastatin PathwaySMP00111Not Available
CHILD SyndromeSMP00387Not Available
Cholesteryl ester storage diseaseSMP00508Not Available
Chondrodysplasia Punctata II, X Linked Dominant (CDPX2)SMP00388Not Available
DesmosterolosisSMP00386Not Available
Fluvastatin PathwaySMP00119Not Available
Hyper-IgD syndromeSMP00509Not Available
HypercholesterolemiaSMP00209Not Available
Ibandronate PathwaySMP00079Not Available
Lovastatin PathwaySMP00099Not Available
Lysosomal Acid Lipase Deficiency (Wolman Disease)SMP00319Not Available
Mevalonic aciduriaSMP00510Not Available
Pamidronate PathwaySMP00117Not Available
Pravastatin PathwaySMP00089Not Available
Risedronate PathwaySMP00112Not Available
Rosuvastatin PathwaySMP00092Not Available
Simvastatin Action PathwaySMP00082Not Available
Smith-Lemli-Opitz Syndrome (SLOS)SMP00389Not Available
Steroid BiosynthesisSMP00023map00100
Wolman diseaseSMP00511Not Available
Zoledronate PathwaySMP00107Not Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDNot Available
DrugBank Metabolite IDNot Available
Phenol Explorer Compound IDNot Available
Phenol Explorer Metabolite IDNot Available
FoodDB IDFDB012781
KNApSAcK IDNot Available
Chemspider ID389458
KEGG Compound IDC05107
BioCyc IDNot Available
BiGG ID45126
Wikipedia LinkNot Available
NuGOwiki LinkHMDB03896
Metagene LinkHMDB03896
METLIN IDNot Available
PubChem Compound440558
PDB IDNot Available
ChEBI ID27910
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Yu H, Wessels A, Tint GS, Patel SB: Partial rescue of neonatal lethality of Dhcr7 null mice by a nestin promoter-driven DHCR7 transgene expression. Brain Res Dev Brain Res. 2005 Apr 21;156(1):46-60. [15862627 ]
  2. Solca C, Pandit B, Yu H, Tint GS, Patel SB: Loss of apolipoprotein E exacerbates the neonatal lethality of the Smith-Lemli-Opitz syndrome mouse. Mol Genet Metab. 2007 May;91(1):7-14. Epub 2007 Jan 2. [17197219 ]

Enzymes

General function:
Energy production and conversion
Specific function:
Catalyzes the reduction of the delta-24 double bond of sterol intermediates. Protects cells from oxidative stress by reducing caspase 3 activity during apoptosis induced by oxidative stress. Also protects against amyloid-beta peptide-induced apoptosis.
Gene Name:
DHCR24
Uniprot ID:
Q15392
Molecular weight:
60100.805
Reactions
7-Dehydrodesmosterol + NADPH + Hydrogen Ion → 7-Dehydrocholesterol + NADPdetails