neomycin C + 2-oxoglutarate = 6′′′-deamino-6′′′-oxoneomycin C + L-glutamate
neoN (gene name)
2-oxoglutarate:neomycin C aminotransferase
The reaction occurs in vivo in the opposite direction. Involved in the biosynthetic pathway of aminoglycoside antibiotics of the neomycin family. Works in combination with EC 184.108.40.206, 6′′′-hydroxyneomycin C oxidase, to replace the 6′′′-hydroxy group of 6′′′-deamino-6′′′-hydroxyneomycin C with an amino group.
The enzyme, characterized from the bacterium Streptomyces fradiae, can also catalyse EC 220.127.116.11, neamine transaminase.
Huang, F., Spiteller, D., Koorbanally, N.A., Li, Y., Llewellyn, N.M. and Spencer, J.B. Elaboration of neosamine rings in the biosynthesis of neomycin and butirosin. ChemBioChem.8 (2007) 283–288. [DOI] [PMID: 17206729]
Clausnitzer, D., Piepersberg, W. and Wehmeier, U.F. The oxidoreductases LivQ and NeoQ are responsible for the different 6′-modifications in the aminoglycosides lividomycin and neomycin. J. Appl. Microbiol.111 (2011) 642–651. [DOI] [PMID: 21689223]