S-adenosyl-L-methionine-dependent O-methyltransferase that catalyzes the last step in the erythromycin biosynthesis pathway. Methylates the position 3 of the mycarosyl moiety of erythromycin C, forming the most active form of the antibiotic, erythromycin A. Can also methylate the precursor erythromycin D, forming erythromycin B.

Belongs to the methyltransferase superfamily.

306 amino acids

MSVKQKSALQDLVDFAKWHVWTRVRPSSRARLAYELFADDHEATTEGAYINLGYWKPGCAGLEEANQELANQLAEAAGISEGDEVLDVGFGLGAQDFFWLETRKPARIVGVDLTPSHVRIASERAERENVQDRLQFKEGSATDLPFGAETFDRVTSLESALHYEPRTDFFKGAFEVLKPGGVLAIGDIIPLDLREPGSDGPPKLAPQRSGSLSGGIPVENWVPRETYAKQLREAGFVDVEVKSVRDNVMEPWLDYWLRKLQDESFKKSVSRLFYSQVKRSLTSDSGMKGELPALDFVIASARKPGA

34 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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