EC - Ornithine aminotransferase

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IntEnz Enzyme Nomenclature


Accepted name:
ornithine aminotransferase
Other names:
L-ornithine 5-aminotransferase
L-ornithine aminotransferase
L-ornithine:α-ketoglutarate δ-aminotransferase
ornithine 5-aminotransferase
ornithine δ-transaminase
ornithine transaminase
ornithine:α-oxoglutarate transaminase
ornithine—2-oxoacid aminotransferase
ornithine—α-ketoglutarate aminotransferase
ornithine—keto acid aminotransferase
ornithine—keto acid transaminase
ornithine—ketoglutarate aminotransferase
ornithine—oxo acid aminotransferase
ornithine—oxo-acid transaminase
ornithine ketoacid aminotransferase
Systematic name:
L-ornithine:2-oxo-acid aminotransferase




A pyridoxal-phosphate protein.

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , NIST 74 , UniPathway
Protein domains and families: PROSITE:PDOC00519
Structural data: CSA , EC2PDB
Gene Ontology: GO:0004587
CAS Registry Number: 9030-42-6
UniProtKB/Swiss-Prot: (53) [show] [UniProt]


  1. Fincham, J.R.S.
    Ornithine transaminase in Neurospora and its relation to the biosynthesis of proline.
    Biochem. J. 53: 313-320 (1953). [PMID: 13032071]
  2. Katunuma, N., Matsuda, Y. and Tomino, I.
    Studies on ornithine-ketoacid transaminase. I. Purification and properties.
    J. Biochem. (Tokyo) 56: 499-503 (1964). [PMID: 14244051]
  3. Meister, A.
    Enzymatic transamination reactions involving arginine and ornithine.
    J. Biol. Chem. 206: 587-596 (1954). [PMID: 13143017]
  4. Peraino, C., Bunville, L.G. and Tahmisian, T.N.
    Chemical, physical, and morphological properties of ornithine aminotransferase from rat liver.
    J. Biol. Chem. 244: 2241-2249 (1969). [PMID: 5783831]
  5. Quastel, J.H. and Witty, R.
    Ornithine transaminase.
    Nature 167: 556 (1951). [PMID: 14826840]
  6. Strecker, H.J.
    Purification and properties of rat liver ornithine δ-transaminase.
    J. Biol. Chem. 240: 1225-1230 (1965). [PMID: 14284729]

[EC created 1961]