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EC Number	General Information	Commentary	Reference
2.1.1.B120	physiological function	enzyme catalyzes methylation of the 6'-carbon of gentamicin X2 (GenX2) to produce G418 during the biosynthesis of gentamicins. The 6'-pro-R-hydrogen atom of GenX2 is stereoselectively abstracted by the 5'-dAdo· radical and methylation occurs with retention of configuration at C6'. In A model of GenK catalysis free rotation of the radical-bearing carbon is prevented and the radical SAM machinery sits adjacent rather than opposite to the Me-Cbl cofactor with respect to the substrate in the enzyme active site	757066

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Release 2023.1 (January 2023)