Article
NovJ/NovK catalyze benzylic oxidation of a beta-hydroxyl tyrosyl-S-pantetheinyl enzyme during aminocoumarin ring formation in novobiocin biosynthesis.
Biochemistry - 27 Sept 2005
Pacholec M, Hillson N J, Walsh C T
Abstract excerpt
The bicyclic coumarin ring in the aminocoumarin natural product antibiotics that target bacterial DNA gyrase is assembled from tyrosine by nonribosomal peptide synthetase logic. Tyrosine has previously been shown to be activated and installed as a phosphopantetheinyl thioester on the thiolation domain of NovH and then hydroxylated on the benzylic carbon by the heme protein NovI, generating beta-OH-Tyr-S-NovH....
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