Acetylene hydratase

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In enzymology, an acetylene hydratase (EC 4.2.1.112) is a rare example of an enzyme containing tungsten. It catalyzes the hydration of acetylene to give acetaldehyde:[1]

C2H2 + H2O → CH3CHO

The W centre is bound to two molybdopterin cofactors.[2] The mechanism is thought to involve attachment of acetylene to the metal followed by nucleophilic attack of water.[3]

This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is acetaldehyde hydro-lyase (acetylene-forming). Other names in common use include AH, and acetaldehyde hydro-lyase. Acetylene hydratase participates in tetrachloroethene degradation.

References

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