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Recent achievements in the generation of stable genome alterations/mutations in species of the genus Streptomyces. Appl Microbiol Biotechnol 2019; 103:5463-5482. [DOI: 10.1007/s00253-019-09901-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/07/2019] [Accepted: 05/08/2019] [Indexed: 12/13/2022]
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Complete Genome Sequence of Streptomyces parvulus 2297, Integrating Site-Specifically with Actinophage R4. GENOME ANNOUNCEMENTS 2016; 4:4/4/e00875-16. [PMID: 27563047 PMCID: PMC5000831 DOI: 10.1128/genomea.00875-16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Streptomyces parvulus 2297, which is a host for site-specific recombination according to actinophage R4, is derived from the type strain ATCC 12434. Species of S. parvulus are known as producers of polypeptide antibiotic actinomycins and have been considered for industrial applications. We herein report for the first time the complete genome sequence of S. parvulus 2297.
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Miura T, Nishizawa A, Nishizawa T, Asayama M, Shirai M. Actinophage R4 integrase-based site-specific chromosomal integration of non-replicative closed circular DNA. J Basic Microbiol 2016; 56:635-44. [PMID: 26870903 DOI: 10.1002/jobm.201500658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 01/27/2016] [Indexed: 11/07/2022]
Abstract
The actinophage R4 integrase (Sre)-based molecular genetic engineering system was developed for the chromosomal integration of multiple genes in Escherichia coli. A cloned DNA fragment containing two attP sites, green fluorescent protein (gfp) as a first transgene, and an antibiotic resistance gene as a selection marker was self-ligated to generate non-replicative closed circular DNA (nrccDNA) for integration. nrccDNA was introduced into attB-inserted E. coli cells harboring the plasmid expressing Sre by electroporation. The expressed Sre catalyzed site-specific integration between one of the two attP sites on nrccDNA and the attB site on the E. coli chromosome. The integration frequency was affected by the chromosomal location of the target site. A second nrccDNA containing two attB sites, lacZα encoding the alpha fragment of β-galactosidase as a transgene, and another antibiotic resistance gene was integrated into the residual attP site on the gfp-integrated E. coli chromosome via one of the two attB sites according to reiterating site-specific recombination. The integrants clearly exhibited β-galactosidase activity and green fluorescence, suggesting the simultaneous expression of multiple recombinant proteins in E. coli. The results of the present study showed that a step-by-step integration procedure using nrccDNA achieved the chromosomal integration of multiple genes.
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Affiliation(s)
- Takamasa Miura
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Department of Bioresource Science, Ibaraki University College of Agriculture, Ibaraki, Japan
| | - Akito Nishizawa
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Department of Bioresource Science, Ibaraki University College of Agriculture, Ibaraki, Japan
| | - Tomoyasu Nishizawa
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Department of Bioresource Science, Ibaraki University College of Agriculture, Ibaraki, Japan
| | - Munehiko Asayama
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Department of Bioresource Science, Ibaraki University College of Agriculture, Ibaraki, Japan
| | - Makoto Shirai
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Department of Bioresource Science, Ibaraki University College of Agriculture, Ibaraki, Japan
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