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Record Information
Creation Date2006-08-12 23:14:06 UTC
Update Date2017-03-02 21:27:19 UTC
Secondary Accession Numbers
  • HMDB06263
Metabolite Identification
Common Name3a,7a,12a-Trihydroxy-5b-cholestan-26-al
Description3alpha,7alpha,12alpha-Trihydroxy-5beta-cholestan-26-al is an intermediate in bile acid biosynthesis. Bile acids are steroid acids found predominantly in bile of mammals. The distinction between different bile acids is minute, depends only on presence or absence of hydroxyl groups on positions 3, 7, and 12. Bile acids are physiological detergents that facilitate excretion, absorption, and transport of fats and sterols in the intestine and liver. Bile acids are also steroidal amphipathic molecules derived from the catabolism of cholesterol. They modulate bile flow and lipid secretion, are essential for the absorption of dietary fats and vitamins, and have been implicated in the regulation of all the key enzymes involved in cholesterol homeostasis. Bile acids recirculate through the liver, bile ducts, small intestine and portal vein to form an enterohepatic circuit. They exist as anions at physiological pH and, consequently, require a carrier for transport across the membranes of the enterohepatic tissues. The unique detergent properties of bile acids are essential for the digestion and intestinal absorption of hydrophobic nutrients. Bile acids have potent toxic properties (e.g., membrane disruption) and there are a plethora of mechanisms to limit their accumulation in blood and tissues. (PMID: 11316487 , 16037564 , 12576301 , 11907135 ). 3a,7a,12a-trihydroxy-5b-cholestane-27-al is an enzymatically generated intermediate in the oxidation process of 5b-cholestane-3a,7a,12a,27-tetrol into 3a,7a,12a-trihydroxy-5b-cholestanoic acid in liver mitochondria. Mitochondrial sterol 27-hydroxylase (EC appears to perform multiple monooxygenations in this conversion. (PMID: 8496170 ).
3 alpha,7-alpha,12 alpha-Trihydroxy-5 beta-cholestan-26-alMeSH
Chemical FormulaC27H46O4
Average Molecular Weight434.6517
Monoisotopic Molecular Weight434.33960996
IUPAC Name(6R)-2-methyl-6-[(1S,2S,5R,7S,9R,10R,11S,14R,15R,16S)-5,9,16-trihydroxy-2,15-dimethyltetracyclo[²,⁷.0¹¹,¹⁵]heptadecan-14-yl]heptanal
Traditional Name(6R)-2-methyl-6-[(1S,2S,5R,7S,9R,10R,11S,14R,15R,16S)-5,9,16-trihydroxy-2,15-dimethyltetracyclo[²,⁷.0¹¹,¹⁵]heptadecan-14-yl]heptanal
CAS Registry Number3836-01-9
InChI Identifier
Chemical Taxonomy
ClassificationNot classified
StatusExpected but not Quantified
  • Endogenous
  • Food
  • Cell signaling
  • Fuel and energy storage
  • Fuel or energy source
  • Hormones
  • Membrane component
  • Membrane integrity/stability
  • Nutrients
  • Stabilizers
  • Surfactants and Emulsifiers
Cellular locations
  • Extracellular
Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogP4.265Not Available
Predicted Properties
Water Solubility0.013 mg/mLALOGPS
pKa (Strongest Acidic)16.07ChemAxon
pKa (Strongest Basic)-0.16ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area77.76 Å2ChemAxon
Rotatable Bond Count6ChemAxon
Refractivity123.64 m3·mol-1ChemAxon
Polarizability52.42 Å3ChemAxon
Number of Rings4ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
SpectraNot Available
Biological Properties
Cellular Locations
  • Extracellular
Biofluid LocationsNot Available
Tissue LocationNot Available
27-Hydroxylase DeficiencySMP00720Not Available
Bile Acid BiosynthesisSMP00035map00120
Cerebrotendinous Xanthomatosis (CTX)SMP00315Not Available
Congenital Bile Acid Synthesis Defect Type IISMP00314Not Available
Congenital Bile Acid Synthesis Defect Type IIISMP00318Not Available
Familial Hypercholanemia (FHCA)SMP00317Not Available
Zellweger SyndromeSMP00316Not 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 IDFDB023188
KNApSAcK IDNot Available
Chemspider ID388578
KEGG Compound IDC01301
BioCyc IDNot Available
BiGG ID37315
Wikipedia LinkNot Available
NuGOwiki LinkHMDB03533
Metagene LinkHMDB03533
METLIN IDNot Available
PubChem Compound439479
PDB IDNot Available
ChEBI ID16466
Synthesis ReferenceDayal B; Tint G S; Batta A K; Shefer S; Salen G Synthesis of biological precursors of cholic acid II. Steroids (1981), 37(2), 205-11.
Material Safety Data Sheet (MSDS)Not Available
General References
  1. St-Pierre MV, Kullak-Ublick GA, Hagenbuch B, Meier PJ: Transport of bile acids in hepatic and non-hepatic tissues. J Exp Biol. 2001 May;204(Pt 10):1673-86. [PubMed:11316487 ]
  2. Claudel T, Staels B, Kuipers F: The Farnesoid X receptor: a molecular link between bile acid and lipid and glucose metabolism. Arterioscler Thromb Vasc Biol. 2005 Oct;25(10):2020-30. Epub 2005 Jul 21. [PubMed:16037564 ]
  3. Chiang JY: Bile acid regulation of hepatic physiology: III. Bile acids and nuclear receptors. Am J Physiol Gastrointest Liver Physiol. 2003 Mar;284(3):G349-56. [PubMed:12576301 ]
  4. Davis RA, Miyake JH, Hui TY, Spann NJ: Regulation of cholesterol-7alpha-hydroxylase: BAREly missing a SHP. J Lipid Res. 2002 Apr;43(4):533-43. [PubMed:11907135 ]
  5. Holmberg-Betsholtz I, Lund E, Bjorkhem I, Wikvall K: Sterol 27-hydroxylase in bile acid biosynthesis. Mechanism of oxidation of 5 beta-cholestane-3 alpha,7 alpha,12 alpha,27-tetrol into 3 alpha,7 alpha,12 alpha-trihydroxy-5 beta-cholestanoic acid. J Biol Chem. 1993 May 25;268(15):11079-85. [PubMed:8496170 ]


General function:
Involved in monooxygenase activity
Specific function:
Catalyzes the first step in the oxidation of the side chain of sterol intermediates; the 27-hydroxylation of 5-beta-cholestane-3-alpha,7-alpha,12-alpha-triol. Has also a vitamin D3-25-hydroxylase activity.
Gene Name:
Uniprot ID:
Molecular weight:
27-Deoxy-5b-cyprinol → 3a,7a,12a-Trihydroxy-5b-cholestan-26-aldetails
3a,7a,12a-Trihydroxy-5b-cholestan-26-al + NADPH + Oxygen + Hydrogen Ion → 3a,7a,12a-Trihydroxy-5b-cholestanoic acid + NADP + Waterdetails