Computational Analysis of Molecular Recognition in DNA Base-Sequence and Groove by Methidium Chloride Using Molecular Mechanics Calculation
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概要
- 論文の詳細を見る
Computational analysis of minor and major groove methidium-DNA complexes in B-form DNA 5-d(CATCCCGGGATG) is performed for intercalation at each base pair. The most stable structure based on stabilization energies was calculated by a combination of molecular mechanics (augmented MM2) and molecular dynamics (MD) methods. When methidium intercalates from the minor groove, the phenanthridine ring is parallel to the nucleobase pairs, and the excluded site size is 6.4 Å. The stabilization is maximal when the methidium intercalates between 5-d(CG) from the minor groove (-28.3 kcal·mol-1). Calculations using MD showed that the complex was considerably less stable when the methidium intercalated from the major groove. This result is consistent with experimental results demonstrating that the intercalation of methidium occurs from the minor groove. A plot of the calculated stabilization energy vs. the logarithm of the binding constant of ethidium bromide with each dinucleotide affords a linear relationship.
- 日本コンピュータ化学会の論文
著者
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SAKAI Norio
Department of Molecular and Pharmacological Neuroscience, Graduate School of Biomedical Sciences, Hi
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Konakahara Takeo
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Sci
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Komatsu Harunobu
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Sci
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GOLD Barry
Eppley Institute for Research in Cancer and Allied Diseases
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Sakai Norio
Department Of Developmental Medicine (pediatrics) D-5 Osaka University Graduate School Of Medicine.
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Sakai Norio
Department Of Biopharmaceutics And Drug Rational Research Center School Of Pharmacy Tokyo University
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SAKAI Norio
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
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KOMATSU Harunobu
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
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KONAKAHARA Takeo
Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
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Konakahara Takeo
Department of Applied Chemistry, Science University of Tokyo
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