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Identification
YMDB IDYMDB00062
NameMethanethiol
SpeciesSaccharomyces cerevisiae
StrainBaker's yeast
DescriptionMethanethiol, also known as methylmercaptan or CH3SH, belongs to the class of organic compounds known as alkylthiols. These are organic compounds containing the thiol functional group linked to an alkyl chain. Methanethiol is an extremely weak basic (essentially neutral) compound (based on its pKa). Methanethiol exists in all living species, ranging from bacteria to humans.
Structure
Thumb
Synonyms
  • CH3SH
  • Mercaptan methylique
  • Mercaptomethane
  • Methanethiol
  • Methanethiole
  • Methanthiol
  • Methvtiolo
  • Methyl mercaptan
  • Methyl sulfhydrate
  • Methyl thioalcohol
  • Methylmercaptaan
  • Metilmercaptano
  • Thiomethane
  • Thiomethanol
  • Methylmercaptan
  • Methylmercaptan, lead (2+) salt
  • Methanethiolate
  • Methylmercaptan, sodium salt
  • Methylmercaptan, mercury (2+) salt
CAS number74-93-1
WeightAverage: 48.107
Monoisotopic: 48.003370818
InChI KeyLSDPWZHWYPCBBB-UHFFFAOYSA-N
InChIInChI=1S/CH4S/c1-2/h2H,1H3
IUPAC Namemethanethiol
Traditional IUPAC Namemethanethiol
Chemical FormulaCH4S
SMILES[H]SC([H])([H])[H]
Chemical Taxonomy
Description belongs to the class of organic compounds known as alkylthiols. These are organic compounds containing the thiol functional group linked to an alkyl chain.
KingdomOrganic compounds
Super ClassOrganosulfur compounds
ClassThiols
Sub ClassAlkylthiols
Direct ParentAlkylthiols
Alternative Parents
Substituents
  • Alkylthiol
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physical Properties
StateGas
Charge0
Melting point-123 °C
Experimental Properties
PropertyValueReference
Water Solubility15.4 mg/mL at 25 oC [HINE,J & MOOKERJEE,PK (1975)]PhysProp
LogPNot AvailablePhysProp
Predicted Properties
PropertyValueSource
Water Solubility20 g/LALOGPS
logP0.73ALOGPS
logP0.84ChemAxon
logS-0.38ALOGPS
pKa (Strongest Acidic)10.34ChemAxon
pKa (Strongest Basic)-9.4ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count0ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area0 ŲChemAxon
Rotatable Bond Count0ChemAxon
Refractivity14.24 m³·mol⁻¹ChemAxon
Polarizability5.33 ųChemAxon
Number of Rings0ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations
  • cytoplasm
Organoleptic Properties
Flavour/OdourSource
Decomposing cabbageFDB011886
GarlicFDB011886
GasolineFDB011886
SulfurFDB011886
SMPDB PathwaysNot Available
KEGG Pathways
Cysteine and methionine metabolismec00270 Map00270
SMPDB ReactionsNot Available
KEGG Reactions
Methanethiol + O-Acetyl-L-homoserineL-Methionine + Acetic acid + hydron
Concentrations
Intracellular ConcentrationsNot Available
Extracellular ConcentrationsNot Available
Spectra
Spectra
References
References:
  • UniProt Consortium (2011). "Ongoing and future developments at the Universal Protein Resource." Nucleic Acids Res 39:D214-D219.21051339
  • Herrgard, M. J., Swainston, N., Dobson, P., Dunn, W. B., Arga, K. Y., Arvas, M., Bluthgen, N., Borger, S., Costenoble, R., Heinemann, M., Hucka, M., Le Novere, N., Li, P., Liebermeister, W., Mo, M. L., Oliveira, A. P., Petranovic, D., Pettifer, S., Simeonidis, E., Smallbone, K., Spasic, I., Weichart, D., Brent, R., Broomhead, D. S., Westerhoff, H. V., Kirdar, B., Penttila, M., Klipp, E., Palsson, B. O., Sauer, U., Oliver, S. G., Mendes, P., Nielsen, J., Kell, D. B. (2008). "A consensus yeast metabolic network reconstruction obtained from a community approach to systems biology." Nat Biotechnol 26:1155-1160.18846089
  • Mulet, J. M., Alemany, B., Ros, R., Calvete, J. J., Serrano, R. (2004). "Expression of a plant serine O-acetyltransferase in Saccharomyces cerevisiae confers osmotic tolerance and creates an alternative pathway for cysteine biosynthesis." Yeast 21:303-312.15042590
Synthesis Reference:Not Available
External Links:
ResourceLink
CHEBI ID16007
HMDB IDHMDB03227
Pubchem Compound ID878
Kegg IDC00409
ChemSpider ID855
FOODB IDFDB011886
WikipediaMethanethiol
BioCyc IDMETHANETHIOL

Enzymes

General function:
Involved in pyridoxal phosphate binding
Specific function:
Transforms O-acetylhomoserine into homocysteine and O- acetylserine into cysteine
Gene Name:
MET17
Uniprot ID:
P06106
Molecular weight:
48671.39844
Reactions
O-acetyl-L-homoserine + methanethiol → L-methionine + acetate.
O(3)-acetyl-L-serine + H(2)S → L-cysteine + acetate.