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Cloning of the posterior silk glands specific-expressed gene of silkworm

누에 후부실샘 특이 발현 유전자 클로닝

  • Piao, Yulan (Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, RDA) ;
  • Kim, Seong-Ryul (Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, RDA) ;
  • Kim, Sung-Wan (Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, RDA) ;
  • Kang, Seok-Woo (Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, RDA) ;
  • Goo, Tae-Won (Department of Biochemistry, School of Medicine, Dongguk University) ;
  • Choi, Kwang-Ho (Sericultural & Apicultural Materials Division, National Academy of Agricultural Science, RDA)
  • 박옥란 (농촌진흥청 국립농업과학원 잠사양봉소재과) ;
  • 김성렬 (농촌진흥청 국립농업과학원 잠사양봉소재과) ;
  • 김성완 (농촌진흥청 국립농업과학원 잠사양봉소재과) ;
  • 강석우 (농촌진흥청 국립농업과학원 잠사양봉소재과) ;
  • 구태원 (동국대학교 의과대학) ;
  • 최광호 (농촌진흥청 국립농업과학원 잠사양봉소재과)
  • Received : 2015.03.30
  • Accepted : 2015.04.29
  • Published : 2015.04.30

Abstract

We characterized tissue specific-expressed genes in the posterior silk gland of Bombyx mori using by the Annealing Control Primer based differential display-PCR manner. In this study, we isolated 34 differentially expressed PCR amplicons, which one of these was identified as a novel transcript named as ACP-16 (366 bp), its expression was observed only in the posterior silk glands by Northern blot analysis. To determine promoter region of the ACP-16, we isolated and analyzed a phage DNA having 1.7 kb-long genome DNA including the open reading flame and 5'- upstream untranslated region of the ACP-16 gene from a genomic DNA library. We have estimated a promoter region of the ACP-16 gene by a web promoter prediction engine, which locates -750 ~ -165 from translation initiation site (ATG, +1). ACP-16 gene is necessary to more studies about critical biological role in order to apply the silkworm's transgenic system.

본 연구는 누에 후부실샘에서 특이적으로 발현하는 새로운 전사체를 탐색하고 이의 프로모터 영역을 분석함으로서 향후 형질전환누에 제작용 전이벡터 시스템의 효율성 제고를 위해 활용하고자 하였다. 우선 새로운 후부실샘 특이 발현 전사체 선발을 위해 ACP-based dd-PCR 방법으로 후부실샘에서 특이적으로 발현하는 34개 PCR 증폭 산물이 선발되었는데, 이 중 지금까지 보고된 바 없는 새로운 전사체인 ACP-16(366 bp)이 선발되었다. Northern blotting hybridization 분석 결과, ACP-16은 후부실샘에서 특이적으로 발현되는 것이 확인되었으며 전사체 발현량에서는 fibroin light chain 보다는 적었으며 전사체 크기에서는 fibroin light chain 보다는 다소 큰 것으로 확인되었다. ACP-16 유전자 프로모터 영역을 클로닝 하기 위해 게놈 유전자은행으로부터 ACP-16 (366 bp)를 탐침으로 전체 17.4 kb 크기의 파이지 클론을 선발할 수 있었으며, 전사체 상류에 유전자 발현조절에 필요한 TATA box와 Cap box 구조를 확인할 수 있었다. 본 연구에서 확보된 ACP-16 유전자의 프로모터 영역은 이후 코어 프로모터 개발 연구를 통하여 효과적인 누에 형질전환 시스템 구축에 적용할 수 있을 것으로 기대된다.

Keywords

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