Novel vectors and methods for a single-stranded DNA mediated gene transfer system via transformation, fusion or transduction of Streptomyces, other actinomycetes, and E. coli using a variety of vectors. Phasmid shuttle vectors of the invention are particularly useful as single-stranded vectors that appear to bypass one or more host cell restriction systems, and thus increase the efficiency of gene transfer into highly restrictive host cell systems. New and useful vectors are provided that allow for the cloning of genes both for increasing the yields of known antibiotics and also for producing new antibiotics, antibiotic derivatives, or any other useful gene product, including a variety of mammalian protein products.
利用各种载体,通过转化、融合或转导链霉菌、其他放线菌和大肠杆菌,实现单链 DNA 介导的
基因转移系统的新型载体和方法。本发明的噬菌体穿梭载体作为单链载体特别有用,它似乎可以绕过一个或多个宿主细胞限制系统,从而提高
基因转移到高限制性宿主
细胞系统的效率。本发明提供了新的有用的载体,可以克隆
基因,既可以提高已知抗生素的产量,也可以生产新的抗生素、抗生素衍
生物或任何其他有用的
基因产品,包括各种哺乳动物蛋白质产品。