IUBMB Enzyme Nomenclature


Accepted name: aclacinomycin-A oxidase

Reaction: aclacinomycin A + O2 = aclacinomycin Y + H2O2

For diagram of reaction click here.

Glossary: aclacinomycin A = 2-ethyl-1,2,3,4,6,11-hexahydro-2,5,7-trihydroxy-6,11-dioxo-4-[[2,3,6-trideoxy-4-O-[2,6-dideoxy-4-O-[(2R,6S)-tetrahydro-6-methyl-5-oxo-2H-pyran-2-yl]-α-L-lyxo-hexopyranosyl]-3-(dimethylamino)-α-L-lyxo-hexopyranosyl]oxy]naphthacene-1-carboxylic acid methyl ester
aclacinomycin Y = 2-ethyl-1,2,3,4,6,11-hexahydro-2,5,7-trihydroxy-6,11-dioxo-4-[[2,3,6-trideoxy-4-O-[2,6-dideoxy-4-O-[(2R,6S)-5,6-dihydro-6-methyl-5-oxo-2H-pyran-2-yl]-α-L-lyxo-hexopyranosyl]-3-(dimethylamino)-α-L-lyxo-hexopyranosyl]oxy]naphthacene-1-carboxylic acid methyl ester

Other name(s): AknOx (ambiguous); aclacinomycin oxidoreductase (ambiguous)

Systematic name: aclacinomycin-A:oxygen oxidoreductase

Comments: A flavoprotein (FAD). This bifunctional enzyme is a secreted flavin-dependent enzyme that is involved in the modification of the terminal sugar residues in the biosynthesis of aclacinomycins. The enzyme utilizes the same active site to catalyse the oxidation of the rhodinose moiety of aclacinomycin N to the cinerulose A moiety of aclacinomycin A (cf. EC and the oxidation of the latter to the L-aculose moiety of aclacinomycin Y.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number:


1. Yoshimoto, A., Ogasawara, T., Kitamura, I., Oki, T., Inui, T., Takeuchi, T. and Umezawa, H. Enzymatic conversion of aclacinomycin A to Y by a specific oxidoreductase in Streptomyces. J. Antibiot. (Tokyo) 32 (1979) 472-481. [PMID: 528393]

2. Alexeev, I., Sultana, A., Mantsala, P., Niemi, J. and Schneider, G. Aclacinomycin oxidoreductase (AknOx) from the biosynthetic pathway of the antibiotic aclacinomycin is an unusual flavoenzyme with a dual active site. Proc. Natl. Acad. Sci. USA 104 (2007) 6170-6175. [PMID: 17395717]

3. Sultana, A., Alexeev, I., Kursula, I., Mantsala, P., Niemi, J. and Schneider, G. Structure determination by multiwavelength anomalous diffraction of aclacinomycin oxidoreductase: indications of multidomain pseudomerohedral twinning. Acta Crystallogr. D Biol. Crystallogr. 63 (2007) 149-159. [PMID: 17242508]

[EC created 2013]

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