EC - Neamine transaminase

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IntEnz Enzyme Nomenclature


Accepted name:
neamine transaminase
Other names:
glutamate—6'-dehydroparomamine aminotransferase
btrB (gene name)
neoN (gene name)
kacL (gene name)
Systematic name:
neamine:2-oxoglutarate aminotransferase



The reaction occurs in vivo in the opposite direction. Involved in the biosynthetic pathways of several clinically important aminocyclitol antibiotics, including kanamycin B, butirosin, neomycin and ribostamycin. Works in combination with EC, paromamine 6-oxidase, to replace the 6'-hydroxy group of paromamine with an amino group. The enzyme from the bacterium Streptomyces kanamyceticus can also catalyse EC, 2'-deamino-2'-hydroxyneamine transaminase, which leads to production of kanamycin A [3]. The enzyme from the bacterium Streptomyces fradiae can also catalyse EC, leading to production of neomycin C [2].

Links to other databases

Enzymes and pathways: NC-IUBMB , BRENDA , ExplorEnz , ENZYME@ExPASy , KEGG , MetaCyc , UniPathway
Structural data: CSA , EC2PDB


  1. Huang, F., Spiteller, D., Koorbanally, N. A., Li, Y., Llewellyn, N. M., Spencer, J. B.
    Elaboration of neosamine rings in the biosynthesis of neomycin and butirosin.
    Chembiochem 8: 283-288 (2007). [PMID: 17206729]
  2. Clausnitzer, D., Piepersberg, W., 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: 642-651 (2011). [PMID: 21689223]
  3. Park, J. W., Park, S. R., Nepal, K. K., Han, A. R., Ban, Y. H., Yoo, Y. J., Kim, E. J., Kim, E. M., Kim, D., Sohng, J. K., Yoon, Y. J.
    Discovery of parallel pathways of kanamycin biosynthesis allows antibiotic manipulation.
    Nat. Chem. Biol. 7: 843-852 (2011). [PMID: 21983602]

[EC created 2012]