Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Cloning, cSNP Identification, and Genotyping of Pig Complement Factor B(CFB) Gene Located on the SLA Class III Region

SLA Class III 영역의 돼지 Complement Factor B(CFB) 유전자의 Cloning, cSNP 동정 및 유전자형 분석

  • Kim, Jae-Hwan (Division of Applied Life Science(BK21 program), Gyeongsang National University) ;
  • Lim, Hyun-Tae (Division of Applied Life Science(BK21 program), Gyeongsang National University) ;
  • Seo, Bo-Yeong (Division of Applied Life Science(BK21 program), Gyeongsang National University) ;
  • Zhong, Tao (Division of Applied Life Science(BK21 program), Gyeongsang National University) ;
  • Yoo, Chae-Kyoung (Division of Applied Life Science(BK21 program), Gyeongsang National University) ;
  • Jung, Eun-Ji (Division of Applied Life Science(BK21 program), Gyeongsang National University) ;
  • Jeon, Jin-Tae (Division of Applied Life Science(BK21 program), Gyeongsang National University)
  • 김재환 (경상대학교 응용생명과학부(BK21 program)) ;
  • 임현태 (경상대학교 응용생명과학부(BK21 program)) ;
  • 서보영 (경상대학교 응용생명과학부(BK21 program)) ;
  • 종타오 (경상대학교 응용생명과학부(BK21 program)) ;
  • 유채경 (경상대학교 응용생명과학부(BK21 program)) ;
  • 정은지 (경상대학교 응용생명과학부(BK21 program)) ;
  • 전진태 (경상대학교 응용생명과학부(BK21 program))
  • Published : 2008.12.31
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Abstract

The primers for RT-PCR and RACE-PCR were designed by aligning the pig genomic sequence and the human complement factor B(CFB) coding sequence(CDS) from the GenBank. Each PCR product was amplified in pig cDNA and sequencing was carried out. The CDS length of pig CFB gene was determined to be 2298 bp. In addition, the pig CDS was more longer than human and mouse orthologs because of insertion and deletion. The identities of porcine nucleotide sequences with those of human and mice were 84% and 80%, and the identities of amino acids were 79% to 77%, respectively. Three complement control protein(CCP) domains, one Von Willebrand factor A(VWFA) domain and a serine protease domain, that are revealed typically in mammals, were found in the pig CFB gene. Based on the CDSs determined, the primers were designed in intron regions for amplification of entire length of exons. In amplification and direct sequencing with genomic DNAs of six pig breeds, three cSNPs(coding single nucleotide polymorphisms) were identified and verified as missense mutations. Using the Multiplex-ARMS method, we genotyped and verified the mutations identified from direct sequencing. To demonstrate recrudescence, we performed both direct sequencing and Multiplex-ARMS with two randomly selected DNA samples. The genotype of each sample exhibited the same results using both methods. Therefore, three cSNPs were identified from pig CFB gene and that can be used for haplotype analysis of the swine leukocyte antigen(SLA) class III region. Moreover, the results indicate that the Multiplex-ARMS method should be powerful for genotyping of genes in the SLA region.

GenBank database로부터 돼지 genomic 서열과 사람의 CFB 유전자의 CDS를 정렬하여 돼지 CFB 유전자의 CDS를 추정하였다. 이를 바탕으로 제작된 primer를 이용하여 RT-PCR을 실시하여 CDS 내부서열을 결정하였으며, 결정된 서열을 바탕으로 primer 제작 및 RACE-PCR을 실시하였다. 돼지 CFB 유전자의 전체 CDS 길이는 2298 bp였으며, 사람 및 마우스와의 비교결과 염기삽입/결실이 확인되었다. CDS 및 아미노산 서열을 사람 및 마우스와 비교한 결과 CDS는 84% 및 80%, 아미노산 서열은 79%, 77%의 상동성을 보였다. 포유류의 CFB에서 일반적으로 나타나는 보체조절단백질(complement control protein, CCP) 영역, Von willebrand factor A(VWFA) 영역, 그리고 serine protease 영역이 확인되었으며, 단백질 기능에 중요하게 작용하는 아미노산 잔기들은 돼지를 포함한 사람, 마우스, 소, 말에서 동일하게 나타났다. 사람, 마우스, 소, 말, 돼지 CFB 유전자의 아미노산 서열에 의한 유전적 거리지수 및 neighbor-joining tree 작성 결과 돼지는 같은 우제목에 속하는 소와 가장 가까운 계통유전학적 유연관계를 나타내었다. 결정된 CDS를 바탕으로 exon 영역을 증폭하기 위한 primer를 제작하였고, cSNP 분석을 위해서 돼지 6품종을 대상으로 direct sequencing을 실시하였다. 그 결과 아미노산 치환을 일으키는 3개(C13T, A1696G, A2015C)의 cSNP가 동정되었다. 동일한 DNA를 사용하여 동정된 3개의 cSNP를 대상으로 Multiplex- ARMS 방법으로 유전자형 분석 결과 direct sequencing 결과와 일치하였다. Multiplex-ARMS 방법의 재현성 확인을 위해 무작위로 2개의 DNA 시료를 선발한 후 direct sequencing과 Multiplex-ARMS 분석을 각각 실시하였으며, 3개의 cSNP에 대한 유전자형이 일치함을 재확인하였다. 따라서 본 연구에서 확인된 3개의 cSNP는 SLA class III 영역의 haplotype 분석을 위한 기초 자료로 사용될 수 있으며, Multiplex- ARMS 기법은 이종장기 개발에 필수적인 SLA 전체 영역 내 유전자들의 유전자형 분석을 위한 효율적인 분석방법이라고 사료된다.

Keywords

References

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