Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Proteome Analysis of Drosophila melanogaster Used 2-DE and MALDI- TOF-MS

이차원 전기영동과 펩타이드 지문 검색법을 이용한 초파리의 프로테옴 분석

  • Published : 2005.06.01
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Abstract

With the completely discovery of the Drosophila genome sequence, the next great challenge is to extract its biological information by systematic expression and to perform functional analysis of the gene. Here we reported a proteome analysis of D. melanogaster with two-dimensional electrophoresis (2-DE) and matrix-assisted laser desorption ionization time-of-flight mass spectrometer (MALDI-TOF-MS). The cell extracts of D. melanogaster, $200{\mu}g$ were resolved to more than 400 silver-stained spots by 2-DE. The most abundant protein spots were ranged from 4.0-7.5 of pI and from 15-90 kDa of molecular weight. The excised spots were destained and in-gel digested by trypsin. The masses of the resulting peptide mixtures were measured by MALDI-TOF-MS. Identified proteins were compared with measured peptide mass and a dynamic peptide searching database which is accessible via the internet. The results revealed that identified proteins were produced by 59 genes derived from 65 protein spots.

초파리는 유전학, 발달 생물학, 행동 유전학, 노화 연구에 이르기까지 수많은 연구에 이용 되어져 왔다. 최근 초파리 전체 유전자의 염기서열이 보고되었으며, 유전자의 기능 분석과 발현 단백질에 대한 연구가 진행되고 있다. 본 연구에서는 야생형 초파리에서 추출한 단백질을 이차원 전기영동을 통해 400여개 이상의 단백질 스폿으로 분리하였으며, 각 스폿을 적출하여 트립신으로 처리하여 얻어진 펩타이드 단편을 MALDI-TOF-MS를 이용한 펩타이드 지문 검색으로 질량을 측정하였다. 측정된 질량을 초파리 데이터 베이스를 이용하여 분리한 단백질을 동정함으로써 59개의 유전자에서 발현되는 65개의 단백질 스폿을 동정하였다. 이러한 결과는 향후의 발생단계, 외부 자극, 노화 등에 관련되는 특이적 단백질 연구의 기초 자료로 활용될 수 있을 것이다.

Keywords

References

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