Left-handedly curved DNA regulates accessibility to cis-DNA elements in chromatin

Jun Ichi Nishikawa, Miho Amano, Yoshiro Fukue, Shigeo Tanaka, Haruka Kishi, Yoshiko Hirota, Kinya Yoda, Takashi Ohyama*

*この研究の対応する著者

研究成果: Article査読

28 被引用数 (Scopus)

抄録

There is little information on chromatin structure that allows access of trans-acting transcription factors. Logically, the target DNA elements become accessible by either exposing themselves towards the environment on the surface of the nucleosome, or making the regulatory region free of the nucleosome. Here, we demonstrate that curved DNA that mimics a negative supercoil can play both roles in the promoter region. By constructing 35 reporter plasmids and using in vivo assay systems, we scrutinized the relationships between upstream DNA geometry, nucleosome positioning and promoter activity. When the left-handedly curved DNA was linked to the herpes simplex virus thymidine kinase (HSV tk) promoter at a specific rotational phase and distance, the curved DNA attracted the nucleosome and the TATA box was thereby left in the linker DNA with its minor groove facing outwards, which led to the activation of transcription. Neither planar curving, nor right-handedly curved DNA nor straight DNA had this effect. Our results seem to provide a clue for solving the problem of why curved DNA is often located near transcriptional control regions.

本文言語English
ページ(範囲)6651-6662
ページ数12
ジャーナルNucleic acids research
31
22
DOI
出版ステータスPublished - 2003 11 15
外部発表はい

ASJC Scopus subject areas

  • 遺伝学

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