Recovery of intact yeast chromosomal DNA from agarose gel plugs using coil-globule transition

Jun Komatsu, Michihiko Nakano, Hirofumi Kurita, Kazunori Takashima, Shinji Katsura, Akira Mizuno

研究成果: ジャーナルへの寄稿学術誌査読

4 被引用数 (Scopus)

抄録

In the current studies, we designed a new approach for sizing and isolating chromosomal DNA using coil-globule transition, which avoids fragmentation of giant DNA due to mechanical stress. Although coil-globule transition is reversible and globular DNA is tolerant to mechanical stress, globular DNA cannot be manipulated by an electric field because of the loss of its negative charges. In our system, however, DNA is extracted from an agarose gel in a coiled state into a solution of PEG, and coil-globule transition is induced by cations generated at the anode. This method achieves buffer exchange without stirring, which is the main cause of mechanical stress. Real-time analysis of T4dc viral DNA molecules revealed that they change immediately from a coiled to a globular form when the cation concentration is sufficiently high. This method was used to prepare yeast chromosomal DNA in a globular state without fragmentation.

本文言語英語
ページ(範囲)4296-4303
ページ数8
ジャーナルELECTROPHORESIS
26
22
DOI
出版ステータス出版済み - 11月 2005
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 分析化学
  • 生化学
  • 臨床生化学

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