title: Rapid PCR amplification of minimal enediyne polyketide synthase cassettes leads to a predictive familial classification model.
abstract: A universal PCR method for the rapid amplification of minimal enediyne polyketide synthase (PKS) genes and the application of this methodology to clone remaining prototypical genes from producers of structurally determined enediynes in both family types are presented. A phylogenetic analysis of the new pool of bona fide enediyne PKS genes, consisting of three from 9-membered producers (neocarzinostatin, C1027, and maduropeptin) and three from 10-membered producers (calicheamicin, dynemicin, and esperamicin), reveals a clear genotypic distinction between the two structural families from which to form a predictive model. The results from this study support the postulation that the minimal enediyne PKS helps define the structural divergence of the enediyne core and provides the key tools for generating enediyne hybrid genes/molecular scaffolds; by using the model, a classification is also provided for the unknown enediyne PKS genes previously identified via genome scanning.
authors.affiliation: Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, 777 Highland Avenue, Madison, WI 53705, USA.
authors.forename: Wen
authors.initials: W
authors.lastname: Liu
authors.forename: Joachim
authors.initials: J
authors.lastname: Ahlert
authors.forename: Qunjie
authors.initials: Q
authors.lastname: Gao
authors.forename: Evelyn
authors.initials: E
authors.lastname: Wendt-Pienkowski
authors.forename: Ben
authors.initials: B
authors.lastname: Shen
authors.forename: Jon S
authors.initials: JS
authors.lastname: Thorson
mesh_terms: D000192:Actinomycetales / Q000201:enzymology / Q000235:genetics; D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000096:biosynthesis / Q000737:chemistry; D001483:Base Sequence; D004269:DNA, Bacterial / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D005798:Genes, Bacterial; D008847:Micromonospora / Q000201:enzymology / Q000235:genetics; D008957:Models, Genetic; D008969:Molecular Sequence Data; D009097:Multienzyme Complexes / Q000737:chemistry / Q000145:classification* / Q000235:genetics*; D010802:Phylogeny; D016133:Polymerase Chain Reaction / Q000379:methods*; D017434:Protein Structure, Tertiary; D017386:Sequence Homology, Amino Acid
chemical_list: D000900:Anti-Bacterial Agents; D004269:DNA, Bacterial; D009097:Multienzyme Complexes