Record Information
Version1.0
Creation date2011-09-21 00:06:29 UTC
Update date2020-04-21 18:02:45 UTC
Primary IDFDB021982
Secondary Accession NumbersNot Available
Chemical Information
FooDB Name17alpha-Hydroxypregnenolone
Description17a-Hydroxypregnenolone is a 21-carbon steroid that is converted from pregnenolone by cytochrome P450 17alpha hydroxylase/C17,20 lyase (CYP17, EC 1.14.99.9). 17a-Hydroxypregnenolone is an intermediate in the delta-5 pathway of biosynthesis of gonadal steroid hormones and the adrenal corticosteroids. The first, rate-limiting and hormonally regulated step in the biosynthesis of all steroid hormones is the conversion of cholesterol to pregnenolone. The conversion of cholesterol to pregnenolone is accomplished by the cleavage of the cholesterol side chain, catalyzed by a mitochondrial cytochrome P450 enzyme termed P450scc where scc designates Side Chain Cleavage. All steroid hormones are made from the pregnenolone produced by P450scc; thus, the presence or absence of each of the activities of CYP17 directs this pregnenolone towards its final metabolic pathway. While all cytochrome P450 enzymes can catalyze multiple reactions on a single active site, CYP17 is the only one described to date in which these multiple activities are differentially regulated by a physiologic process. 17a-Hydroxypregnenolone is converted to dehydroepiandrosterone by the 17,20 lyase activity of CYP17. The ratio of the 17,20 lyase to 17 alpha-hydroxylase activity of CYP17 determines the ratio of C21 to C19 steroids produced. This ratio is regulated post-translationally by at least three factors: the abundance of the electron-donating protein P450 oxidoreductase, the presence of cytochrome b5, and the serine phosphorylation of CYP17. (PMID: 12573809) [HMDB]
CAS Number387-79-1
Structure
Thumb
Synonyms
SynonymSource
(3beta)-3,17-Dihydroxypregn-5-en-20-oneChEBI
17-HydroxypregnenoloneChEBI
5-Pregnen-3beta,17alpha-diol-20-oneChEBI
(3b)-3,17-Dihydroxypregn-5-en-20-oneGenerator
(3Β)-3,17-dihydroxypregn-5-en-20-oneGenerator
5-Pregnen-3b,17a-diol-20-oneGenerator
5-Pregnen-3β,17α-diol-20-oneGenerator
17-Hydroxy-D5-pregnenoloneHMDB
17-OH-PregnenoloneHMDB
17a-HydroxypregnoloneHMDB
17alpha-HydroxypregnanoloneHMDB
17alpha-HydroxypregnenoloneHMDB
3b,17-Dihydroxy-5-pregnen-20-oneHMDB
3b,17-Dihydroxy-pregn-5-en-20-oneHMDB
3b,17a-Dihydroxypregn-5-en-20-oneHMDB
17alpha HydroxypregnenoloneHMDB
HydroxypregnenoloneHMDB
17 HydroxypregnenoloneHMDB
17 alpha HydroxypregnenoloneHMDB
17-Hydroxypregnenolone, (3alpha)-isomerHMDB
17-Hydroxypregnenolone, (3beta,13alpha)-isomerHMDB
17-alpha-HydroxypregnenoloneHMDB
17 alpha-HydroxypregnenoloneHMDB
17-Hydroxypregnenolone, (3beta,13alpha,17alpha)-isomerHMDB
17-Hydroxypregnenolone, (3beta,17alpha)-isomerHMDB
(3β)-3,17-dihydroxypregn-5-en-20-oneGenerator
17-OH-pregnenolonehmdb
17a-HydroxypregnenoloneGenerator
17α-hydroxypregnenoloneGenerator
Predicted Properties
PropertyValueSource
Water Solubility0.038 g/LALOGPS
logP3.15ALOGPS
logP2.83ChemAxon
logS-4ALOGPS
pKa (Strongest Acidic)12.7ChemAxon
pKa (Strongest Basic)-1.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count2ChemAxon
Polar Surface Area57.53 ŲChemAxon
Rotatable Bond Count1ChemAxon
Refractivity95.16 m³·mol⁻¹ChemAxon
Polarizability38.66 ųChemAxon
Number of Rings4ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Chemical FormulaC21H32O3
IUPAC name1-[(1S,2R,5S,10R,11S,14R,15S)-5,14-dihydroxy-2,15-dimethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-7-en-14-yl]ethan-1-one
InChI IdentifierInChI=1S/C21H32O3/c1-13(22)21(24)11-8-18-16-5-4-14-12-15(23)6-9-19(14,2)17(16)7-10-20(18,21)3/h4,15-18,23-24H,5-12H2,1-3H3/t15-,16+,17-,18-,19-,20-,21-/m0/s1
InChI KeyJERGUCIJOXJXHF-TVWVXWENSA-N
Isomeric SMILES[H][C@@]12CC[C@](O)(C(C)=O)[C@@]1(C)CC[C@@]1([H])[C@@]2([H])CC=C2C[C@@H](O)CC[C@]12C
Average Molecular Weight332.477
Monoisotopic Molecular Weight332.23514489
Classification
Description Belongs to the class of organic compounds known as gluco/mineralocorticoids, progestogins and derivatives. These are steroids with a structure based on a hydroxylated prostane moiety.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassSteroids and steroid derivatives
Sub ClassPregnane steroids
Direct ParentGluco/mineralocorticoids, progestogins and derivatives
Alternative Parents
Substituents
  • Progestogin-skeleton
  • 20-oxosteroid
  • 3-hydroxy-delta-5-steroid
  • 3-hydroxysteroid
  • 17-hydroxysteroid
  • 3-beta-hydroxysteroid
  • 3-beta-hydroxy-delta-5-steroid
  • Oxosteroid
  • Hydroxysteroid
  • Delta-5-steroid
  • Alpha-hydroxy ketone
  • Tertiary alcohol
  • Cyclic alcohol
  • Secondary alcohol
  • Ketone
  • Organic oxygen compound
  • Organooxygen compound
  • Carbonyl group
  • Hydrocarbon derivative
  • Alcohol
  • Organic oxide
  • Aliphatic homopolycyclic compound
Molecular FrameworkAliphatic homopolycyclic compounds
External Descriptors
Ontology
OntologyNo ontology term
Physico-Chemical Properties - Experimental
Physico-Chemical Properties - Experimental
PropertyValueReference
Physical stateSolid
Physical DescriptionNot Available
Mass CompositionNot Available
Melting PointNot Available
Boiling PointNot Available
Experimental Water SolubilityNot Available
Experimental logPNot Available
Experimental pKaNot Available
Isoelectric pointNot Available
ChargeNot Available
Optical RotationNot Available
Spectroscopic UV DataNot Available
DensityNot Available
Refractive IndexNot Available
Spectra
Spectra
EI-MS/GC-MS
TypeDescriptionSplash KeyView
GC-MS17alpha-Hydroxypregnenolone, 1 MEOX; 2 TMS, GC-MS Spectrumsplash10-054x-4900000000-df86d10979d808f20e67Spectrum
GC-MS17alpha-Hydroxypregnenolone, 1 MEOX; 2 TMS, GC-MS Spectrumsplash10-0a73-3910000000-7a0eea991ac4d2fac97eSpectrum
GC-MS17alpha-Hydroxypregnenolone, non-derivatized, GC-MS Spectrumsplash10-0f89-2891000000-3605ad7dd57f97382115Spectrum
GC-MS17alpha-Hydroxypregnenolone, non-derivatized, GC-MS Spectrumsplash10-0ff0-3792000000-974e157d4c25e376b004Spectrum
GC-MS17alpha-Hydroxypregnenolone, non-derivatized, GC-MS Spectrumsplash10-054x-4900000000-df86d10979d808f20e67Spectrum
GC-MS17alpha-Hydroxypregnenolone, non-derivatized, GC-MS Spectrumsplash10-0a73-3910000000-7a0eea991ac4d2fac97eSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, non-derivatized, Predicted GC-MS Spectrum - 70eV, Positivesplash10-000f-3295000000-48ed11374901b134a70dSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, 2 TMS, Predicted GC-MS Spectrum - 70eV, Positivesplash10-03di-0111900000-e55e71b4d8c63cde89c2Spectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, non-derivatized, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, non-derivatized, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TMS_1_1, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TMS_1_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TMS_1_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TMS_2_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TMS_2_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TBDMS_1_1, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TBDMS_1_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TBDMS_1_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TBDMS_2_1, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TBDMS_2_2, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
Predicted GC-MS17alpha-Hydroxypregnenolone, TBDMS_2_3, Predicted GC-MS Spectrum - 70eV, PositiveNot AvailableSpectrum
MS/MS
TypeDescriptionSplash KeyView
MS/MSLC-MS/MS Spectrum - Quattro_QQQ 10V, Positive (Annotated)splash10-001i-0039000000-28c103ca6cdf072557bfSpectrum
MS/MSLC-MS/MS Spectrum - Quattro_QQQ 25V, Positive (Annotated)splash10-0a4i-0900000000-ae3004bb674d9632cd0cSpectrum
MS/MSLC-MS/MS Spectrum - Quattro_QQQ 40V, Positive (Annotated)splash10-014i-0900000000-a2f467560b451d5c9b0eSpectrum
MS/MSLC-MS/MS Spectrum - EI-B (HITACHI M-52) , Positivesplash10-0f89-2891000000-82e62584fff36943bcbaSpectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0159-0029000000-131b75950fb7123106d9Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-015i-0094000000-2a48017855d3965d5626Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0g29-2690000000-3d1b2b0525a2f6da149cSpectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-0009000000-4c286aa6d88850e66ba9Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-008i-0098000000-77ce542de402b225ac27Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0avr-0092000000-e39f57cc01b46a017728Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-0009000000-08a5ce4022cbdbf8bfa1Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-001i-0029000000-8619dcbabe228085742aSpectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-000i-0091000000-4088584830d78ccb6fb2Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-00lr-0029000000-275368791dddb24379f9Spectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-014m-0910000000-b08f322c49579d81e79aSpectrum
Predicted MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0002-1940000000-1f423724847a658c9f85Spectrum
NMR
TypeDescriptionView
1D NMR1H NMR SpectrumSpectrum
2D NMR[1H,13C] 2D NMR SpectrumSpectrum
ChemSpider ID82579
ChEMBL IDCHEMBL408706
KEGG Compound IDC05138
Pubchem Compound ID91451
Pubchem Substance IDNot Available
ChEBI ID28750
Phenol-Explorer IDNot Available
DrugBank IDNot Available
HMDB IDHMDB00363
CRC / DFC (Dictionary of Food Compounds) IDNot Available
EAFUS IDNot Available
Dr. Duke IDNot Available
BIGG ID45199
KNApSAcK IDNot Available
HET IDNot Available
Food Biomarker OntologyNot Available
VMH IDNot Available
Flavornet IDNot Available
GoodScent IDNot Available
SuperScent IDNot Available
Wikipedia ID17-Hydroxypregnenolone
Phenol-Explorer Metabolite IDNot Available
Duplicate IDSNot Available
Old DFC IDSNot Available
Associated Foods
FoodContent Range AverageReference
FoodReference
Biological Effects and Interactions
Health Effects / BioactivitiesNot Available
Enzymes
NameGene NameUniProt ID
Cytochrome P450, family 21, subfamily A, polypeptide 2CYP21A2Q08AG9
Cytochrome P450 21-hydroxylaseP450-CYP21BQ16874
Pathways
NameSMPDB LinkKEGG Link
Androgen and Estrogen MetabolismSMP00068 map00150
SteroidogenesisSMP00130 map00140
MetabolismNot Available
BiosynthesisNot Available
Organoleptic Properties
FlavoursNot Available
Files
MSDSshow
References
Synthesis ReferenceNot Available
General ReferenceNot Available
Content Reference