This model describes coenzyme PQQ biosynthesis protein E, a prototypical peptide-cyclizing radical SAM enzyme. It links a Tyr to a Glu as the first step in the biosynthesis of pyrrolo-quinoline-quinone (coenzyme PQQ) from the precursor peptide PqqA. PQQ is required for some glucose dehydrogenases and alcohol dehydrogenases. [Biosynthesis of cofactors, prosthetic groups, and carriers, Other]
Jiyao W et al.(2023). "The conserved domain database in 2023.",