IUBMB Enzyme Nomenclature


Accepted name: acetylornithine transaminase

Reaction: N2-acetyl-L-ornithine + 2-oxoglutarate = N-acetyl-L-glutamate 5-semialdehyde + L-glutamate

For diagram click here.

Other name(s): acetylornithine δ-transaminase; ACOAT; acetylornithine 5-aminotransferase; acetylornithine aminotransferase; N-acetylornithine aminotransferase; N-acetylornithine-δ-transaminase; N2-acetylornithine 5-transaminase; N2-acetyl-L-ornithine:2-oxoglutarate aminotransferase; succinylornithine aminotransferase

Systematic name: N2-acetyl-L-ornithine:2-oxoglutarate 5-aminotransferase

Comments: A pyridoxal-phosphate protein. Also acts on L-ornithine and N2-succinyl-L-ornithine.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9030-40-4


1. Albrecht, A. and Vogel, H.J. Acetylornithine δ-transaminase. Partial purification and repression behavior. J. Biol. Chem. 239 (1964) 1872-1876. [PMID: 14213368]

2. Vogel, H.J. Path of ornithine synthesis in Escherichia coli. Proc. Natl. Acad. Sci. USA 39 (1953) 578-583.

3. Van der Wauven, C. and Stalon, V. Occurrence of succinyl derivatives in the catabolism of arginine in Pseudomonas cepacia. J. Bacteriol. 164 (1985) 882-886. [PMID: 2865249]

4. Voellmy, R. and Leisinger, T. Dual role for N-2-acetylornithine 5-aminotransferase from Pseudomonas aeruginosa in arginine biosynthesis and arginine catabolism. J. Bacteriol. 122 (1975) 799-809. [PMID: 238949]

[EC created 1961, modified 2004 (EC created 1989, incorporated 2004)]

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