Silyl Triflate-Mediated Ring-Closure and Rearrangement in the Synthesis of Potential Bisfuran-Containing Intermediates of Aflatoxin Biosynthesis
作者:Todd L. Graybill、Eduard G. Casillas、Kollol Pal、Craig A. Townsend
DOI:10.1021/ja990591x
日期:1999.9.1
strategy is described involving two silyl triflate-mediated cyclization and rearrangement processes that have enabled both furofuran oxidation states to be readily achieved and undesired but thermodynamically favorable side reactions to be avoided in the preparation of these ring systems. In the first an o-methoxymethyl phenylacetaldehyde is cyclized directly to the five-membered, differentially protected
Cloning genes from streptomyces cyaneogriseus subsp.noncyanogenus for biosynthesis of antibiotics and methods of use
申请人:Wyeth
公开号:EP1477563A2
公开(公告)日:2004-11-17
The present invention relates to the complete biosynthetic pathway for the formation of the LL-F28249 compounds and, most importantly, the major component LL-F28249α. The purified and isolated nucleic acid molecule encoding the proteins of the biosynthetic pathway, which is isolated from a wild-type or mutant Streptomyces, is fully described in SEQ ID NO:1. The DNA gene cluster and its expression in a suitable host enable the efficient production of the highly active natural metabolites and semisynthetic derivatives. The invention further concerns plasmids, vectors and host cells that contain and express the novel nucleic acid molecule. Of particular interest, the entire biosynthetic pathway fits compactly in three plasmids, Cos11, Cos36 and Cos40. The invention also concerns the purified and isolated biosynthesis proteins that are encoded by the whole DNA gene cluster. Additionally, the invention involves a new efficient, biochemical method of preparing moxidectin.
本发明涉及形成 LL-F28249 化合物的完整生物合成途径,最重要的是主要成分 LL-F28249α。从野生型或突变型链霉菌中分离出来的纯化和分离的编码生物合成途径蛋白质的核酸分子在 SEQ ID NO:1 中作了全面描述。DNA 基因簇及其在合适宿主中的表达使高效生产高活性天然代谢物和半合成衍生物成为可能。本发明还涉及含有和表达新型核酸分子的质粒、载体和宿主细胞。特别值得关注的是,整个生物合成途径可紧凑地整合在三个质粒(Cos11、Cos36 和 Cos40)中。本发明还涉及由整个 DNA 基因簇编码的纯化和分离的生物合成蛋白质。此外,本发明还涉及一种制备莫西菌素的新型高效生化方法。
Global regulator of secondary metabolite biosynthesis and methods of use
申请人:Wisconsin Alumni Research Foundation
公开号:US20040058872A1
公开(公告)日:2004-03-25
The invention provides polypeptides and nucleic acids which identify and encode LaeA, a regulator of fungal secondary metabolite production which exhibits global control over secondary metabolite biosynthetic gene clusters. The invention further provides expression vectors, host cells, methods of increasing the production of secondary metabolites in an organism naturally producing a secondary metabolite or engineered to produce a secondary metabolite, and methods of identifying novel secondary metabolite biosynthesis gene clusters.
Cloning genes from streptomyces cyaneogriseus subsp. noncyanogenus for biosynthesis of antibiotics and methods of use
申请人:Huang Chengjin
公开号:US20050003409A1
公开(公告)日:2005-01-06
The present invention relates to the complete biosynthetic pathway for the formation of the LL-F28249 compounds and, most importantly, the major component LL-F28249α. The purified and isolated nucleic acid molecule encoding the proteins of the biosynthetic pathway, which is isolated from a wild-type or mutant
Streptomyces
, is fully described in FIG.
6
to FIG.
6
-
39
and SEQ ID NO:1. The DNA gene cluster and its expression in a suitable host enable the efficient production of the highly active natural metabolites and semisynthetic derivatives. The invention further concerns plasmids, vectors and host cells that contain and express the novel nucleic acid molecule. Of particular interest, the entire biosynthetic pathway fits compactly in three plasmids, Cos11, Cos36 and Cos40. The invention also concerns the purified and isolated biosynthesis proteins that are encoded by the whole DNA gene cluster. Additionally, the invention involves a new efficient, biochemical method of preparing moxidectin.