• 미생물학회지
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• 제28권2호
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• pp.104-108
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• 1990

Ti-plasmid에 의하여 식물체에 종양이 형성되기 위해서는 맨먼저 Agrobacteriuin tumefariens가 식물세포에 부착되어야 하는데, 이에 필요한 유전자들은 세균의 염색체 DNA내에 존재한다. 이들 유전자를 클로닝하기 위하여 transposon 쑤5를 사용하여 A. tumefaciens A5512에 돌연변이를 유발시켰다. 그 결과 식물세포에 부착하지 못하며, 종양을 유발시키지 못하는 두개의 돌연변이체를 얻었다. 이 두 돌연변이체 중 하나로부터 세균이 식물세포에 부착하는데 관여하는 염색체 DNA내의 종양 유발 지역을 클로닝하였다.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2000년도 International Meeting 2000
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• pp.58-65
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• 2000

Diarrheal diseases are a major cause of both illness and death in developing countries and are caused by rotavirus, Shigella spp., Salmonella spp., enterotoxigenic Escherichia coli (ETEC), and Vibrio spp. In this study, for the development of vaccine against diarrheal diseases caused by Shigella sonei, Salmonella typhimurium, E. coli O157, and Vibrio cholerae, cloning and nucleotide sequence analysis of genes and characteristics of their gene products in E. coli were performed. For construction of attenuated strain of S. sonnei KNIH104 and Salmonella typhimurium KNIH100, the aroA genes were cloned, respectively. The recombinant plasmid $_pJP{\Delta}A45$ containing aroA deleted region and suicide vector $(_pJP5603)$ was constructed. The aroA gene deleted mutants were constructed using this recombinant plasmid. For cloning gene encoding antigenic region of E. coli O157 KNIH317, the O-antigen synthesis gene cluster and sit gene was cloned. The E. coli XL1-Blue cells harboring this recombinant plasmid showed cytotoxicity in Vero cells. The ctx gene was cloned for tile purpose of antigenic region against V. cholerae KNIH002. Sequence analysis confirmed that the virulence gene cassette was consisted of ace, zot, ctxA and ctxB genes.