1.0 2011-09-21 01:45:32 UTC 2015-07-21 06:59:32 UTC FDB028821 4alpha-Formyl-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol 4alpha-formyl-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol is a 3-beta-hydroxysterol that is an intermediate in cholesterol biosynthesis I and in cholesterol biosynthesis III (via desmosterol). It is a substrate for C-4 methyl sterol oxidase (SC4MOL) and can be generated from the enzymatic reduction of 4alpha-carboxy-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol or from the enzymatic oxidation of 4alpha-hydroxymethyl-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol. The sequence of reactions and the types of intermediates in cholesterol biosynthesis II may vary. Alternate routes exist because reduction of the carbon 24,25 double bond on the hydrocarbon side chain of the sterol ring structure by sterol delta24-reductase can occur at multiple points in the pathway, giving rise to different intermediates. These intermediates, with or without a double bond in the hydrocarbon side chain, can serve as substrates for the other enzymes in the pathway. The sequence of reactions and the types of intermediates in cholesterol biosynthesis III (via desmosterol) may vary. Alternate routes exist because reduction of the carbon 24,25 double bond on the hydrocarbon side chain of the sterol ring structure by sterol delta24-reductase can occur at multiple points in the pathway, giving rise to different intermediates. These intermediates, with or without a double bond in the hydrocarbon side chain, can serve as substrates for the other enzymes in the pathway. In cholesterol biosynthesis I, 4alpha-formyl-4beta-methyl-5alpha-cholesta-8,24-dien-3beta-ol is an intermediate in the conversion of lanosterol to cholesterol. The enzymology of this multistep conversion was largely determined in rat liver and the human pathway is therefore inferred from this work. Indeed, the order of some of the reactions in this pathway may vary. The lanosterol-to-cholesterol conversion involves the oxidative removal of three methyl groups, reduction of double bonds, and migration of the lanosterol double bond to a new position in cholesterol. The reactions in the lanosterol pathway are catalyzed by membrane-bound enzymes. Human genes have been identified for all the enzymes in this pathway and human disorders of cholesterol metabolism have been associated with genetic defects in most of these enzymes. [HMDB] 4a-formyl-4b-methyl-5a-cholesta-8,24-dien-3b-ol 4a-formyl-4beta-methyl-5a-cholesta-8,24-dien-3beta-ol 4alpha-formyl-4b-methyl-5alpha-cholesta-8,24-dien-3b-ol C29H46O2 426.6743 426.349780716 (2S,5S,6S,15R)-5-hydroxy-2,6,15-trimethyl-14-(6-methylhept-5-en-2-yl)tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-1(10)-ene-6-carbaldehyde (2S,5S,6S,15R)-5-hydroxy-2,6,15-trimethyl-14-(6-methylhept-5-en-2-yl)tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-1(10)-ene-6-carbaldehyde CC(CCC=C(C)C)C1CCC2C3=C(CC[C@]12C)[C@@]1(C)CC[C@H](O)[C@@](C)(C=O)C1CC3 InChI=1S/C29H46O2/c1-19(2)8-7-9-20(3)22-11-12-23-21-10-13-25-28(5,24(21)14-16-27(22,23)4)17-15-26(31)29(25,6)18-30/h8,18,20,22-23,25-26,31H,7,9-17H2,1-6H3/t20?,22?,23?,25?,26-,27+,28+,29-/m0/s1 GFGANDKVOKQAGH-AEWFMJFUSA-N belongs to the class of organic compounds known as triterpenoids. These are terpene molecules containing six isoprene units. Triterpenoids Organic compounds Lipids and lipid-like molecules Prenol lipids Triterpenoids Aliphatic homopolycyclic compounds 3-beta-hydroxysteroids Aldehydes Cholesterols and derivatives Cyclic alcohols and derivatives Hydrocarbon derivatives Organic oxides Secondary alcohols 3-beta-hydroxysteroid 3-hydroxysteroid Alcohol Aldehyde Aliphatic homopolycyclic compound Carbonyl group Cholestane-skeleton Cholesterol-skeleton Cyclic alcohol Hydrocarbon derivative Hydroxysteroid Organic oxide Organic oxygen compound Organooxygen compound Secondary alcohol Steroid Triterpenoid Solid logp 6.17 ALOGPS logs -5.56 ALOGPS solubility 1.17e-03 g/l ALOGPS logp 6.44 ChemAxon pka_strongest_acidic 14.54 ChemAxon pka_strongest_basic -3 ChemAxon iupac (2S,5S,6S,15R)-5-hydroxy-2,6,15-trimethyl-14-(6-methylhept-5-en-2-yl)tetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-1(10)-ene-6-carbaldehyde ChemAxon average_mass 426.6743 ChemAxon mono_mass 426.349780716 ChemAxon smiles CC(CCC=C(C)C)C1CCC2C3=C(CC[C@]12C)[C@@]1(C)CC[C@H](O)[C@@](C)(C=O)C1CC3 ChemAxon formula C29H46O2 ChemAxon inchi InChI=1S/C29H46O2/c1-19(2)8-7-9-20(3)22-11-12-23-21-10-13-25-28(5,24(21)14-16-27(22,23)4)17-15-26(31)29(25,6)18-30/h8,18,20,22-23,25-26,31H,7,9-17H2,1-6H3/t20?,22?,23?,25?,26-,27+,28+,29-/m0/s1 ChemAxon inchikey GFGANDKVOKQAGH-AEWFMJFUSA-N ChemAxon polar_surface_area 37.3 ChemAxon refractivity 130.86 ChemAxon polarizability 53.02 ChemAxon rotatable_bond_count 5 ChemAxon acceptor_count 2 ChemAxon donor_count 1 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::CMs 17465 Specdb::CMs 39845 Specdb::CMs 171083 Specdb::MsMs 304606 Specdb::MsMs 304607 Specdb::MsMs 304608 Specdb::MsMs 347866 Specdb::MsMs 347867 Specdb::MsMs 347868 Specdb::MsMs 2463996 Specdb::MsMs 2463997 Specdb::MsMs 2463998 Specdb::MsMs 2501831 Specdb::MsMs 2501832 Specdb::MsMs 2501833 HMDB12167 Anatidae Type 1 specific Anatidae 8830 Beefalo Type 1 specific Bos taurus X Bison bison 297284 Bison Type 1 specific Bison bison 9901 Buffalo Type 1 specific Bubalus bubalis 89462 Cattle (Beef, Veal) Type 1 specific Bos taurus 9913 Chicken Type 1 specific Gallus gallus 9031 Columbidae (Dove, Pigeon) Type 1 specific Columbidae 8930 Deer Type 1 specific Cervidae 9850 Domestic goat Type 1 specific Capra aegagrus hircus 9925 Domestic pig Type 1 specific Sus scrofa domestica 9825 Elk Type 1 specific Cervus canadensis 1574408 Emu Type 1 specific Dromaius novaehollandiae 8790 European rabbit Type 1 specific Oryctolagus 9984 Greylag goose Type 1 specific Anser anser 8843 Guinea hen Type 1 specific Numida meleagris 8996 Horse Type 1 specific Equus caballus 9796 Mallard duck Type 1 specific Anas platyrhynchos 8839 Mountain hare Type 1 specific Lepus timidus 62621 Mule deer Type 1 specific Odocoileus 9871 Ostrich Type 1 specific Struthio camelus 8801 Pheasant Type 1 specific Phasianus colchicus 9054 Quail Type 1 specific Phasianidae 9005 Rabbit Type 1 specific Leporidae 9979 Rock ptarmigan Type 1 specific Lagopus muta 64668 Sheep (Mutton, Lamb) Type 1 specific Ovis aries 9940 Squab Type 1 specific Columba 8931 Turkey Type 1 specific Meleagris gallopavo 9103 Velvet duck Type 1 specific Melanitta fusca 371864 Wild boar Type 1 specific Sus scrofa 9823