MTV2 Headbanger's Ball: Volume 2

(S)-3-amino-2-methylpropionate transaminase

In enzymology, a (S)-3-amino-2-methylpropionate transaminase is an enzyme that catalyzes the chemical reaction

(S)-3-amino-2-methylpropanoate + 2-oxoglutarate rightleftharpoons 2-methyl-3-oxopropanoate + L-glutamate

Thus, the two substrates of this enzyme are (S)-3-amino-2-methylpropanoate and 2-oxoglutarate, whereas its two products are 2-methyl-3-oxopropanoate and L-glutamate.

This enzyme belongs to the family of transferases, specifically the transaminases, which transfer nitrogenous groups. The systematic name of this enzyme class is (S)-3-amino-2-methylpropanoate:2-oxoglutarate aminotransferase. Other names in common use include L-3-aminoisobutyrate transaminase, beta-aminobutyric transaminase, L-3-aminoisobutyric aminotransferase, and beta-aminoisobutyrate-alpha-ketoglutarate transaminase. This enzyme participates in valine, leucine and isoleucine degradation.


  • Kakimoto Y, Kanazawa A, Taniguchi K, Sano I "Beta-aminoisobutyrate-alpha-ketoglutarate transaminase in relation to beta-aminoisobutyric aciduria". Biochim. Biophys. Acta. 156 374–80.
  • Tamaki N, Sakata SF, Matsuda K "Purification, properties, and sequencing of aminoisobutyrate aminotransferases from rat liver". Methods. Enzymol. 324 376–89.

External links

The CAS registry number for this enzyme class is .

Gene Ontology (GO) codes

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