1995年3月
HYDROPHOBIC DNA-BINDING OF ESPERAMICIN REQUIRES CONFORMATIONAL DISTORTION OF THE HOST DNA
BIOCHIMICA ET BIOPHYSICA ACTA-GENE STRUCTURE AND EXPRESSION
- ,
- ,
- 巻
- 1261
- 号
- 1
- 開始ページ
- 99
- 終了ページ
- 106
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/0167-4781(94)00235-U
- 出版者・発行元
- ELSEVIER SCIENCE BV
Evidence is presented that the sequence-specific DNA binding of esperamicin is accompanied by structural distortion of the host DNA that depends on hydrophobic interactions. In the first part of this paper, we describe the effects of conformational freedom of DNA on the DNA-cutting efficiency of esperamicin. If conformational distortion of DNA is significantly required for binding of the drug, then the drug should possess a lower binding/cleaving efficiency for conformationally more restricted DNAs. Our results on model DNAs reveal a substantial decrease in the DNA-cleaving efficiency of esperamicin as the conformational freedom of DNA decrease. In the second part we demonstrate that esperamicin binds to DNA with considerably higher affinity in solutions containing organic solvents. This observation indicates that the required distortion of DNA depends on hydrophobic interactions. Molecular origins of the sequence-specific binding are also discussed on the basis of all available data.
- リンク情報
- ID情報
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- DOI : 10.1016/0167-4781(94)00235-U
- ISSN : 0167-4781
- PubMed ID : 7893766
- Web of Science ID : WOS:A1995QM53400011