摘要:
Combinatorial libraries of polyketides can be obtained by suitable manipulation of a host modular polyketide synthase gene cluster such as that which encodes the PKS for erythromycin. The combinatorial library is useful as a source of pharmaceutically active compounds. In addition, novel polyketides and antibiotics are prepared using this method.
摘要:
The present invention provides novel macrolide compounds of the formulas (I, II, III or IV) wherein: R is hydroxyl or methoxy; R1 is selected from the group consisting of hydrogen, hydroxyl, halide, NH¿2, OR?9, (a, b, c, and d) where R9 is C1-C10 alkenyl, C2-C10 alkynyl, aryl or heteroaryl and R?10 and R11¿ are each independently hydrogen, C¿1?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, or aryl; R?2 and R3¿ are each independently selected from the group consisting of hydrogen, C¿1?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, alkylaryl, alkenylaryl, alkynylaryl or R?2 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 alkynyl, alkylaryl, alkenylaryl, alkynylaryl, amidoalkylaryl, amidoalkenylaryl, or amidoalkynylaryl; R8 is C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, alkylaryl, alkenylaryl, alkynylaryl, amidoalkylaryl, amidoalkenylaryl, or amidoalkynylaryl; and, x is a single or a double bond.
摘要:
Recombinant Myxococcus host cells can be used to produce polyketides, including epothilone and epothilone analogs that can be purified from the fermentation broth and crystallized.
摘要:
Macrolactams are made by feeding aromatic amino acids as replacement starter units to a mutant strain of the geldanamycin-producing microorganism Streptomyces hygroscopicus var. geldanus NRRL 3602, wherein the gene cluster encoding enzymes for the biosynthesis of the natural starter unit 3-amino-5-hydroxybenzoic acid has been deleted.
摘要:
Laulimalide compounds, intermediates thereto and methods for their preparation and methods for their use in the treatment of diseases characterized by cellular hyperproliferation. Formula (I).
摘要:
The present invention includes compounds of the formula wherein: X is hydrogen or halide; R2 is hydrogen, acyl, or a hydroxy protecting group; R6 is hydrogen, hydroxyl, or -ORa wherein Ra is a substituted or unsubstituted moiety selected from the group consisting of C¿1?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, heterocyclo, aryl(C1-C10)alkyl, aryl(C2-C10)alkenyl, aryl(C2-C10)alkynyl, heterocyclo(C1-C10)alkyl, heterocyclo(C2-C10)alkenyl, and heterocyclo(C2-C10)alkynyl; R?13¿ is hydrogen or a substituted or unsubstituted moiety wherein the moiety is selected from the group consisting of methyl; C¿3?-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, heterocyclo, aryl(C1-C10)alkyl, aryl(C2-C10)alkenyl, aryl(C2-C10)alkynyl, heterocyclo(C1-C10)alkyl, heterocyclo(C2-C10)alkenyl, and heterocyclo(C2-C10)alkynyl;and, R is hydrogen or a substituted or unsubstituted moiety wherein the moiety is selected from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, aryl, heterocyclo, aryl(C1-C10)alkyl, aryl(C2-C10)alkenyl, aryl(C2-C10)alkynyl, heterocyclo(C1-C10)alkyl, heterocyclo(C2-C10)alkenyl, and heterocyclo(C2-C10)alkynyl;and the pharmaceutically acceptable salts, esters and pro-drug forms thereof. These compounds possess anti-infective activity and are useful for the treatment of bacterial and protozoal infections.
摘要:
A multiple-plasmid system for heterologous expression of polyketides facilitates combinatorial biosynthesis. The method can be extended to any modular polyketide synthase (PKS) or non-ribosomal peptide synthase (NRPS) and has the potential to produce thousands of novel natural products, including ones derived from further modification of the PKS or NRPS products by tailoring enzymes.