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Literature summary for 2.1.1.B120 extracted from

  • Kim, H.J.; McCarthy, R.M.; Ogasawara, Y.; Liu, Y.; Mansoorabadi, S.O.; LeVieux, J.; Liu, H.
    GenK-catalyzed C-6' methylation in the biosynthesis of gentamicin isolation and characterization of a cobalamin-dependent radical SAM enzyme (2013), J. Am. Chem. Soc., 135, 8093-8096 .
    View publication on PubMedView publication on EuropePMC

Cloned(Commentary)

Cloned (Comment) Organism
expression in Escherichia coli Micromonospora echinospora

Organism

Organism UniProt Comment Textmining
Micromonospora echinospora A0A0K0K526
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Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information 1 equivalent each of 5'-deoxyadenosine and S-adenosyl-homocysteine are produced for each methylation reaction catalyzed by GenK. The S-methyl group from S-adenosyl-L-methionine is transferred to cobalamin and the aminoglycoside product during the course of the reaction. H atom abstraction from C6' of GenX2 is stereoselective for the pro-R site Micromonospora echinospora ?
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additional information no substrates: 6'-fluorogentamicin X2, 6'-O-methylgentamicin X2, 5'-fluorogentamicin X2 Micromonospora echinospora ?
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S-adenosyl-L-methionine + gentamicin X2
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Micromonospora echinospora S-adenosyl-L-homocysteine + G418
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Cofactor

Cofactor Comment Organism Structure
4Fe-4S-center enzyme harbors a single [4Fe-4S] cluster per monomer. 3.5 equivalents of iron and 3.8 equivalents of sulfide are bound to each GenK monomer Micromonospora echinospora
Cobalamin
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Micromonospora echinospora
methylcobalamin activity is nearly maximized in the presence of 1 mM methylcobalamin Micromonospora echinospora