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Acetolactate decarboxylase

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The enzyme acetolactate decarboxylase (EC 4.1.1.5) catalyzes the chemical reaction

(S)-2-hydroxy-2-methyl-3-oxobutanoate (R)-2-acetoin + CO2
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Hence, this enzyme has one substrate, (S)-2-hydroxy-2-methyl-3-oxobutanoate, and two products, (R)-2-acetoin and CO2.[1]

This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is (S)-2-hydroxy-2-methyl-3-oxobutanoate carboxy-lyase [(R)-2-acetoin-forming]. Other names in common use include alpha-acetolactate decarboxylase, and (S)-2-hydroxy-2-methyl-3-oxobutanoate carboxy-lyase. This enzyme participates in butanoate metabolism and c5-branched dibasic acid metabolism.

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Structural studies

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1XV2.

References

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