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Keyword - Cysteine biosynthesis (KW-0198)

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Protein involved in the synthesis of cysteine, the amino acid with the highly reactive sulfhydryl group (-SH). It is derived from the amino acids methionine and serine. Cysteine plays a special role in shaping some proteins by forming disulfide bonds. In enzymes the unique reactivity of this group is frequently exploited at the catalytic site.


  • Cysteine anabolism
  • Cysteine biosynthetic process
  • Cysteine formation
  • Cysteine synthesis


Biological process

Gene Ontology


cysteine biosynthetic process [ GO:0019344 ]


Cysteine biosynthesisAmino-acid biosynthesisBiological process
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