Np mrd loader

Record Information
Version2.0
Created at2005-11-16 15:48:42 UTC
Updated at2020-11-24 22:13:59 UTC
NP-MRD IDNP0000245
Secondary Accession NumbersNone
Natural Product Identification
Common NameDL-Homocystine
DescriptionHomocystine is the double-bonded form of homocysteine, but it occurs only transiently before being converted to the harmless cystathionine via a vitamin B6-dependent enzyme. Homocystine and homocysteine-cysteine mixed disulfide account for >98% of total homocysteine in plasma from healthy individuals (PMID 11592966 ). Oxidation of low-density lipoprotein (LDL) is thought to be a major factor in the pathophysiology of atherosclerosis. Elevated plasma homocysteine is an accepted risk factor for atherosclerosis, and may act through LDL oxidation, although this is controversial. However, the major thiol in plasma is cysteine, which is present at concentrations approximately 10 times greater than homocysteine; therefore homocystine in plasma is insignificant, and consequently homocystine is unlikely to influence LDL oxidation in vivo (PMID 14732479 ). Increasing evidence supports a role for an elevation of homocysteine in schizophrenia. It has been demonstrated that neural tube defects are related to a genetic defect in homocysteine metabolism. Sufficient intake of folic acid is believed to reduce this risk by enhancing methylation of homocysteine and its conversion to methionine, thereby compensating for this genetic defect (Homocystinuria). Plasma homocysteine levels are elevated when folate levels are in the lower half of the normal range (PMID 16143442 ). Moreover, DL-homocystine is found to be associated with methylenetetrahydrofolate reductase deficiency and methylmalonic acidemia, which are also inborn errors of metabolism.
Structure
Thumb
Synonyms
ValueSource
4,4'-Dithiobis(2-aminobutyric acid)ChEBI
HomocystineKegg
4,4'-Dithiobis(2-aminobutyrate)Generator
4,4'-DithiobisHMDB
Chemical FormulaC8H16N2O4S2
Average Mass268.3540 Da
Monoisotopic Mass268.05515 Da
IUPAC Name2-amino-4-[(3-amino-3-carboxypropyl)disulfanyl]butanoic acid
Traditional Namehomocystine
CAS Registry Number870-93-9
SMILES
NC(CCSSCCC(N)C(O)=O)C(O)=O
InChI Identifier
InChI=1S/C8H16N2O4S2/c9-5(7(11)12)1-3-15-16-4-2-6(10)8(13)14/h5-6H,1-4,9-10H2,(H,11,12)(H,13,14)
InChI KeyZTVZLYBCZNMWCF-UHFFFAOYSA-N
Experimental Spectra
Spectrum TypeDescriptionDepositor EmailDepositor OrganizationDepositorDeposition DateView
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, experimental)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, 5%_DMSO, experimental)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
Predicted Spectra
Not Available
Chemical Shift Submissions
Not Available
Species
Species of Origin
Species NameSourceReference
Anas platyrhynchosFooDB
AnatidaeFooDB
Anser anserFooDB
Bison bisonFooDB
Bos taurusFooDB
Bos taurus X Bison bisonFooDB
Bubalus bubalisFooDB
Capra aegagrus hircusFooDB
CervidaeFooDB
Cervus canadensisFooDB
ColumbaFooDB
ColumbidaeFooDB
Dromaius novaehollandiaeFooDB
Equus caballusFooDB
Gallus gallusFooDB
Homo sapiensLOTUS Database
Lagopus mutaFooDB
LeporidaeFooDB
Lepus timidusFooDB
Melanitta fuscaFooDB
Meleagris gallopavoFooDB
Numida meleagrisFooDB
OdocoileusFooDB
OryctolagusFooDB
Ovis ariesFooDB
PhasianidaeFooDB
Phasianus colchicusFooDB
Struthio camelusFooDB
Sus scrofaFooDB
Sus scrofa domesticaFooDB
Chemical Taxonomy
Description Belongs to the class of organic compounds known as alpha amino acids. These are amino acids in which the amino group is attached to the carbon atom immediately adjacent to the carboxylate group (alpha carbon).
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassAmino acids, peptides, and analogues
Direct ParentAlpha amino acids
Alternative Parents
Substituents
  • Alpha-amino acid
  • Thia fatty acid
  • Dicarboxylic acid or derivatives
  • Fatty acid
  • Fatty acyl
  • Organic disulfide
  • Amino acid
  • Dialkyldisulfide
  • Sulfenyl compound
  • Carboxylic acid
  • Organic oxide
  • Organopnictogen compound
  • Primary amine
  • Organosulfur compound
  • Organooxygen compound
  • Organonitrogen compound
  • Primary aliphatic amine
  • Organic oxygen compound
  • Carbonyl group
  • Organic nitrogen compound
  • Amine
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point263 - 265 °CNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
PropertyValueSource
Water Solubility4.5 g/LALOGPS
logP-4.2ALOGPS
logP-5.3ChemAxon
logS-1.8ALOGPS
pKa (Strongest Acidic)1.8ChemAxon
pKa (Strongest Basic)9.8ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count6ChemAxon
Hydrogen Donor Count4ChemAxon
Polar Surface Area126.64 ŲChemAxon
Rotatable Bond Count9ChemAxon
Refractivity64.38 m³·mol⁻¹ChemAxon
Polarizability26.92 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
HMDB IDHMDB0000575
DrugBank IDNot Available
Phenol Explorer Compound IDNot Available
FoodDB IDFDB022123
KNApSAcK IDNot Available
Chemspider ID9616
KEGG Compound IDC01817
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN ID5557
PubChem Compound10010
PDB IDNot Available
ChEBI ID17485
Good Scents IDNot Available
References
General References
  1. Wilcken DE, Gupta VJ: Sulphr containing amino acids in chronic renal failure with particular reference to homocystine and cysteine-homocysteine mixed disulphide. Eur J Clin Invest. 1979 Aug;9(4):301-7. [PubMed:118020 ]
  2. Sengupta S, Wehbe C, Majors AK, Ketterer ME, DiBello PM, Jacobsen DW: Relative roles of albumin and ceruloplasmin in the formation of homocystine, homocysteine-cysteine-mixed disulfide, and cystine in circulation. J Biol Chem. 2001 Dec 14;276(50):46896-904. Epub 2001 Oct 9. [PubMed:11592966 ]
  3. Nakano E, Williamson MP, Williams NH, Powers HJ: Copper-mediated LDL oxidation by homocysteine and related compounds depends largely on copper ligation. Biochim Biophys Acta. 2004 Jan 20;1688(1):33-42. [PubMed:14732479 ]
  4. Brown AS, Susser ES: Homocysteine and schizophrenia: from prenatal to adult life. Prog Neuropsychopharmacol Biol Psychiatry. 2005 Sep;29(7):1175-80. [PubMed:16143442 ]