Molecule: homocysteine zwitterion

An amino acid zwitterion of homocysteine arising from transfer of a proton from the carboxy to the amino group; major species at pH 7.3.
Synonyms for homocysteine zwitterion :
2-ammonio-4-sulfanylbutanoate
Molecular Formula: C4H9NO2S
Molecular wt: 135.18500 g/mole
Charge: 0
SMILES: [NH3+]C(CCS)C([O-])=O
InChIKey: FFFHZYDWPBMWHY-UHFFFAOYSA-N
InChI=1S/C4H9NO2S/c5-3(1-2-8)4(6)7/h3,8H,1-2,5H2,(H,6,7)
CHEBI:58065
Sample reactions for this molecule:
PXLP-CBS tetramers condenses HCYS and L-Ser to form L-Cystathionine
Excess homocysteine yields homolanthionine and H2S
Homocysteine is degraded to oxobutanoate and H2S
BHMT tetramer transfers CH3 group from BET to HCYS to form DMGLY
BHMT tetramer transfers CH3 group from BET to HCYS to form DMGLY
MTR transfers CH3 from MeCbl to HCYS
MTR transfers CH3 from MeCbl to HCYS
MTR transfers CH3 from MeCbl to HCYS
AHCY:NAD+ tetramer hydrolyses AdoHcy
AHCY:NAD+ tetramer hydrolyses AdoHcy