title: Regio- and stereoselective intermolecular oxidative phenol coupling in Streptomyces.
abstract: Intermolecular oxidative phenol coupling is the main process in nature for the formation of atroposelective biaryl compounds. Although well defined in plants and fungi, this type of dimerization reaction in bacteria is poorly understood. Therefore, the biosynthesis of julichromes, spectomycins, and setomimycin was investigated. The monomeric subunits of these biarylic pre-anthraquinones are derived from a common polyketidic precursor, yet the coupling reaction proceeds in a regioselective manner, with the position of attachment of the two subunits depending on the specific streptomycete strain. By using genome analysis and deletion experiments, the biosynthetic gene clusters were identified. Furthermore, it was established that cytochrome P450 enzymes are fundamentally involved during dimerization of the polyketide monomers.
authors.affiliation: Institute of Pharmaceutical Sciences, Albert-Ludwigs-Universität Freiburg , 79104 Freiburg, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Präg
authors.forename: Björn A
authors.initials: BA
authors.lastname: Grüning
authors.forename: Matthias
authors.initials: M
authors.lastname: Häckh
authors.forename: Steffen
authors.initials: S
authors.lastname: Lüdeke
authors.forename: Marcel
authors.initials: M
authors.lastname: Wilde
authors.forename: Andriy
authors.initials: A
authors.lastname: Luzhetskyy
authors.forename: Michael
authors.initials: M
authors.lastname: Richter
authors.forename: Marta
authors.initials: M
authors.lastname: Luzhetska
authors.forename: Stefan
authors.initials: S
authors.lastname: Günther
authors.forename: Michael
authors.initials: M
authors.lastname: Müller
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000378:metabolism; D003577:Cytochrome P-450 Enzyme System / Q000235:genetics / Q000378:metabolism; D005810:Multigene Family; D058451:Oxidative Coupling; D019800:Phenol / Q000737:chemistry / Q000378:metabolism*; D013302:Streptomyces / Q000737:chemistry / Q000201:enzymology / Q000235:genetics / Q000378:metabolism*
chemical_list: D000880:Anthraquinones; D019800:Phenol; D003577:Cytochrome P-450 Enzyme System