Oxidoreductases;
Acting on paired donors, with incorporation or reduction of molecular oxygen;
With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water
The enzyme, characterized from the bacterium Streptomyces aureofaciens, is a member of the flavin-dependent halogenase family. The enzyme forms a lysine chloramine intermediate on an internal lysine residue before transferring the chlorine to the substrate. It is stereo-selective for the 4S (natural) isomer of tetracycline. FADH2 is provided by a dedicated EC 1.5.1.36, flavin reductase (NADH).
Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
1.14.19 With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water
1.14.19.49
R11478 Tetracycline + FADH2 + Cl- + Oxygen + H+ <=> Chlortetracycline + FAD + 2 H2O