Cysteine sulfinic acid

Cysteine sulfinic acid
CAS number 2381-08-0
PubChem 1549098
ChemSpider 1266065
MeSH cysteine+sulfinic+acid
Jmol-3D images Image 1
Molecular formula C3H7NO4S
Molar mass 153.15698
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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Cysteine sulfinic acid is an amino acid containing a sulfinic acid functional group. It is a white solid that is soluble in water. It is an intermediate in cysteine metabolism. It is not a coded amino acid, but is produced post-translationally. Its formation is catalyzed by the enzyme cysteine dioxygenase.

Proteins containing this residue are found at the active site of some nitrile hydratases.[1]