미생물학회지 (Korean Journal of Microbiology)

  • 제43권3호
  • /
  • Pages.179-185
  • /
  • 2007
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  • 0440-2413(pISSN)
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  • 2383-9902(eISSN)
한국미생물학회 (The Microbiological Society of Korea)
권호 표지

Nested PCR과 DNA Enzyme-Linked Immunosorbent Assays를 이용한 Ralstonia solanacearum의 검출

Detection of Ralstonia solanacearum with Nested PCR and DNA Enzyme-Linked Immunosorbent Assay

  • 고영진 (다이아프로브㈜ 진단사업부) ;
  • 조홍범 (서경대학교 생물공학과)
  • 발행 : 2007.09.30
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초록

본 연구는 polymerase chanin reaction(PCR)기법과 DNA enzyme-linked immunosorbent assay(DNA ELISA) 기법을 이용하여 토양내 식물병원균인 Ralstonia solanacearum를 검출하고자 하였다. 토양 시료로부터 분석에 사용될 R. solanacearum DNA를 추출하기 위하여 몇 가지 방법을 비교 평가한 결과 기존의 DNA 추출 방법에 비하여 Guanidin isothiocyanate와 Chelex-100 resin을 사용하는 방법 이 토양 내에 존재하는 다양한 중류의 반응 저해 물질과 R. solanacearum만의 고유한 PCR반응 저해물질들을 제거하는 데에 효과적이었다. R. solanacearum만을 특이적으로 검출하기 위해 fliC유전자 부위에 특이적인 몇 종의 primer들을 제작하였다. 이들 중 높은 민감도와 특이도를 나타내는 두 set의 primer RsolfliC(forward; 5-GAACGCCAACGGTGCGAACT-3 and reverse; 5-GGCGGCCTTCAGGGAGGTC-3, designed by J. $Sch\ddot{o}nfeld$ et al.)와 RS_247 (forward; 5-GGCGGTCTGTCGGCRG-3 and reverse; 5-CGGTCGCGTTGGCAAC-3, designed by this study)를 선정하여 nested PCR을 수행할 수 있도록 고안하였다. Nested PCR primer에 biotin을 표지하였고 nested PCR산물의 내부 서열과 특이적으로 교잡반응을 할 수 있는 probe를 제작하여 PCR 결과를 DNA-EIA반응으로 확인 분석할 수 있도록 하였다. Primary PCR과 nested PCR의 산물을 전기영동 상에서 확인한 결과, nested PCR이 약 $10^2$정도의 높은 민감도를 나타내었고 DNA-EIA의 경우 $10^2P{\sim}10^3$정도의 민감도를 상승시켜주는 것으로 확인되었다.

In this study, we used the method of guanidin isothiocyanate and boiling with Chelex-100 resin to extract genomic DNA of Ralstonia solanacearum from soil. It is more efficient than general protocols to remove inhibitory compounds in soil and R. solanacearum on. Then, we applied polymerase chain reaction and DNA enzyme-linked immunosorbent assay (ELISA) to identify and detect pathogen. The fliC gene of R. solanacearum was selected for specific detection of pathogen and primer sets were designed. Among the primer sets, two specific and sensitive primer sets, RsolfliC(forward: 5-GAACGCCAACGGTGCGAACT-3 and reverse; 5-GGCGGCCTTCAGGGAGGTC-3, designed by J. $Sch\ddot{o}nfeld$ et al.) and RS_247 (forward: 5-GGCGGTCTGTCGGCRG-3 and reverse; 5-CGGTCGCGTTGGCAAC-3 designed by this study), were designed to perform nested PCR. Nested PCR primer was labeled with biotin for hybridization between nested PCR product and probe to analyze with DNA ELISA.

키워드

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