4-acetamidobutyrate deacetylase () is an enzyme characterised from Candida boidinii that catalyzes the hydrolysis reaction that converts 4-acetamidobutyric acid to GABA ( γ-aminobutyric acid) and acetic acid:
This enzyme is a hydrolase, one acting on carbon-nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is 4-acetamidobutanoate amidohydrolase.
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