| 摘要 |
DNA cloning shuttle vectors, including a cosmid shuttle vector, for E. coli and Streptomyces are disclosed. Specifically, disclosed shuttle vectors pAL7002 (NRRL B-18055) and pNJl (NRRL B-18054) contain an E. coli origin of replication, Streptomyces replication functions, and antibiotic resistance markers for both E. coli and Streptomyces. In addition, pNJl contains a cos sequence. Novel 2-norerythromycin antibiotics A, B, C, and D, which were produced in a strain Streptomyces erythreus 12693-240 (NRRL B-18053) transformed by pNJl bearing DNA from Streptomyces antibioticus, are also disclosed. The present invention also provides a method for producing novel antibiotics. This method for antibiotic production is applied to the transformation of a blocked mutant of S. erythreus with genomic DNA from S. antibioticus but may be more broadly applied to genes to antibiotic-producing strains transformed into cells which are blocked in the pathway for production of a different antibiotic.
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