Abstract: Domains of ambruticin polyketide synthase and modification enzymes and polynucleotides encoding them are provided. Methods to prepare ambruticin in pharmaceutically useful quantities are described, as are methods to prepare ambruticin analogs and other polyketides using the polynucleotides encoding ambruticin synthase domains or modifying enzymes.

Abstract: The present invention provides a generalized oxygen-limited cultivation method for myxobacterial strains engineered to heterologously express polyketides synthase (PKS) gene clusters under various oxygen tension conditions, modulating the polyketide congener distribution.

Abstract: The present invention provides bioconversion methods for making epothilone analogs. These analogs differ from the starting material by the addition of one or more hydroxyl groups or by the addition of an epoxide. These compounds, in turn, can be further modified by chemical synthesis.

Abstract: Recombinant E. coli host cells that comprise recombinant DNA expression vectors that drive expression of methylmalonyl CoA mutase from Propionibacterium shermanii or Streptomyces cinnamonensis as well as Propionibacterium shermanii epimerase can produce S-methylmalonyl CoA, a required substrate for the production of polyketides by most modular polyketide synthases and is not present in wild-type E. coli host cells.

Abstract: The present invention provides novel macrolide compounds of the formulas wherein: R is hydroxyl or methoxy; R1 is selected from the group consisting of hydrogen, hydroxyl, halide, NH2, OR9, where R9 is C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl or heteroaryl and R10 and R11 are each independently hydrogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or aryl; R2 and R3 are each independently selected from the group consisting of hydrogen, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, alkylaryl, alkenylaryl alkynylaryl or R2 and R3 together form a cycloalkyl or a cycloaryl moiety; R4 is hydrogen or methyl; R5 is hydrogen, hydroxyl, oxo, or together with R6 and the carbons to which they are attached form a cyclic carbonate; R6 is hydrogen, hydroxyl, OR12 where R12 is C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or together with R5 and the carbons to which they are attached form a cyclic carbonate; R7 is methyl, C3-C10 alkyl, C2-C10 alkenyl, C2-C10 alkyn

Abstract: Laulimalide compounds, intermediates thereto and methods for their preparation, and methods for their use in the treatment of diseases characterized by cellular hyperproliferation.