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ermE | N-6-aminoadenine-N-methyltransferase, erythromycinresistance; This protein produces a dimethylation of the adenine residue at position 2085 in 23S rRNA, resulting in reduced affinity between ribosomes and macrolide-lincosamide-streptogramin B antibiotics; Belongs to the class I-like SAM-binding methyltransferase superfamily. rRNA adenine N(6)-methyltransferase family. (381 aa) | ||||
eryK | Cytochrome P450 Erythromycin B/D C-12 hydroxylase; Responsible for the C-12 hydroxylation of the macrolactone ring of erythromycin. Thus, EryK catalyzes the hydroxylation of erythromycin D (ErD) at the C-12 position to produce erythromycin C (ErC). Erythromycin B (ErB) is not a substrate for this enzyme. (397 aa) | ||||
eryG | Erythromycin C methlytransferase; 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. (306 aa) | ||||
eryF | 6-deoxyerythronolide B hydroxylase (6-DEB hydroxylase); Catalyzes the conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB. Requires the participation of a ferredoxin and a ferredoxin reductase for the transfer of electrons from NADPH to the monooxygenase. (404 aa) |