Lyase

Lyases are enzymes of the fourth class of enzymes according to the systematic nomenclature of enzyme Commission of the International Union of Biochemistry (IUB ) and catalyze a cleavage of the molecule. Lyases are present in all living things. Reaction Scheme:

Lyases produce a non - hydrolytic cleavage of a molecule into two products, usually with the formation of a double bond or a ring structure.

Classification

Lyases are in the EC numbers classification system under EC 4 -. -. - Categorized. Then lyases are further subdivided depending on what type of bond is cleaved:

Other enzyme classes

  • Oxidoreductases ( EC 1 -. -. - )
  • Transferases ( EC 2 -. -. - )
  • Hydrolases ( EC 3 -. -. - )
  • Isomerases ( EC 5 -. -. - )
  • Ligases ( EC 6 -. -. - )
  • Lyase
Hydrolysis Fumarase Argininosuccinate lyase
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