EC - Branched-chain-amino-acid transaminase

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IntEnz Enzyme Nomenclature


Accepted name:
branched-chain-amino-acid transaminase
Other names:
L-branched chain amino acid aminotransferase
branched-chain amino acid aminotransferase
branched-chain amino acid—glutamate transaminase
branched-chain aminotransferase
glutamate—branched-chain amino acid transaminase
transaminase B
Systematic name:
branched-chain-amino-acid:2-oxoglutarate aminotransferase




Also acts on L-isoleucine and L-valine. Different from EC valine-pyruvate transaminase.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , DIAGRAM , DIAGRAM , DIAGRAM , DIAGRAM , DIAGRAM , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Protein domains and families: PROSITE:PDOC00618
Structural data: CSA , EC2PDB
Gene Ontology: GO:0052656 , GO:0052654 , GO:0052655 , GO:0004084
CAS Registry Number: 9054-65-3
UniProtKB/Swiss-Prot: (66) [show] [UniProt]


  1. Aki, K., Ogawa, K. and Ichihara, A.
    Transaminases of branched chain amino acids. IV. Purification and properties of two enzymes from rat liver.
    Biochim. Biophys. Acta 159 : 276-284 (1968). [PMID: 4968655]
  2. Aki, K., Yokojima, A. and Ichihara, A.
    Transaminase of branched chain amino acids. VI. Purification and properties of the hog brain enzyme.
    J. Biochem. (Tokyo) 65 : 539-544 (1969). [PMID: 4979711]
  3. Ichihara, A. and Koyama, E.
    Transaminase of branched chain amino acids. I. Branched chain amino acids-α-ketoglutarate transaminase.
    J. Biochem. (Tokyo) 59 : 160-169 (1966). [PMID: 5943594]
  4. Taylor, R.T. and Jenkins, W.T.
    Leucine aminotransferase. II. Purification and characterization.
    J. Biol. Chem. 241 : 4396-4405 (1966). [PMID: 5922965]
  5. Rudman, D. and Meister, A.
    Transamination in Escherichia coli.
    J. Biol. Chem. 200 : 591-604 (1953). [PMID: 13034817]

[EC created 1972]