IUBMB Enzyme Nomenclature


Accepted name: 4-aminobutyrate—2-oxoglutarate transaminase

Reaction: 4-aminobutanoate + 2-oxoglutarate = succinate semialdehyde + L-glutamate

For diagram of reaction click here

Glossary: 4-aminobutanoate = γ-aminobutyrate = GABA

Other name(s): β-alanine-oxoglutarate transaminase; aminobutyrate aminotransferase (ambiguous); β-alanine aminotransferase; β-alanine-oxoglutarate aminotransferase; γ-aminobutyrate aminotransaminase (ambiguous); γ-aminobutyrate transaminase (ambiguous); γ-aminobutyrate-α-ketoglutarate aminotransferase; γ-aminobutyrate-α-ketoglutarate transaminase; γ-aminobutyrate:α-oxoglutarate aminotransferase; γ-aminobutyric acid aminotransferase (ambiguous); γ-aminobutyric acid transaminase (ambiguous); γ-aminobutyric acid-α-ketoglutarate transaminase; γ-aminobutyric acid-α-ketoglutaric acid aminotransferase; γ-aminobutyric acid-2-oxoglutarate transaminase; γ-aminobutyric transaminase (ambiguous); 4-aminobutyrate aminotransferase (ambiguous); 4-aminobutyrate-2-ketoglutarate aminotransferase; 4-aminobutyrate-2-oxoglutarate aminotransferase; 4-aminobutyrate-2-oxoglutarate transaminase; 4-aminobutyric acid 2-ketoglutaric acid aminotransferase; 4-aminobutyric acid aminotransferase (ambiguous); aminobutyrate transaminase (ambiguous); GABA aminotransferase (ambiguous); GABA transaminase (ambiguous); GABA transferase (ambiguous); GABA-α-ketoglutarate aminotransferase; GABA-α-ketoglutarate transaminase; GABA-α-ketoglutaric acid transaminase; GABA-α-oxoglutarate aminotransferase; GABA-2-oxoglutarate aminotransferase; GABA-2-oxoglutarate transaminase; GABA-oxoglutarate aminotransferase; GABA-oxoglutarate transaminase; glutamate-succinic semialdehyde transaminase; GabT

Systematic name: 4-aminobutanoate:2-oxoglutarate aminotransferase

Comments: Requires pyridoxal phosphate. Some preparations also act on β-alanine, 5-aminopentanoate and (R,S)-3-amino-2-methylpropanoate. cf. EC, β-alanine—2-oxoglutarate transaminase.

Links to other databases: BRENDA, EXPASY, GTD, KEGG, MetaCyc, PDB, CAS registry number: 9037-67-6


1. Scott, E.M. and Jakoby, W.B. Soluble γ-aminobutyric-glutamic transaminase from Pseudomonas fluorescens, J. Biol. Chem. 234 (1959) 932-936. [PMID: 13654294]

2. Aurich, H. Über die β-Alanin-α-Ketoglutarat-Transaminase aus Neurospora crassa, Hoppe-Seyler's Z. Physiol. Chem. 326 (1961) 25-33. [PMID: 13863304]

3. Schausboe, A., Wu, J.-Y. and Roberts, E. Purification and characterization of the 4-aminobutyrate-2-ketoglutarate transaminase from mouse brain. Biochemistry 12 (1973) 2868-2873. [PMID: 4719123]

4. Bartsch, K., von Johnn-Marteville, A. and Schulz, A. Molecular analysis of two genes of the Escherichia coli gab cluster: nucleotide sequence of the glutamate:succinic semialdehyde transaminase gene (gabT) and characterization of the succinic semialdehyde dehydrogenase gene (gabD). J. Bacteriol. 172 (1990) 7035-7042. [PMID: 2254272]

[EC created 1965, modified 1982, modified 2012, modified 2021]

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