Roles of Functional Loops and the C-Terminal Segment of a Single-Stranded DNA Binding Protein Elucidated by X-Ray Structure Analysis.

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概要

• 論文の詳細を見る

• The single-stranded DNA (ssDNA) binding protein from Escherichia coli (EcoSSB) plays a central role in DNA replication, recombination, and repair. The tertiary structure of EcoSSB was determined at 2.2 Å resolution. This is rather higher resolution than previously reported. Crystals were grown from the homogeneous intact protein but the EcoSSB tetramer in the crystals contains truncated subunits lacking a part of the C-terminal. The structure determined includes biologically important flexible loops and C-terminal regions, and revealed the existence of concavities. These concavities include the residues important for ssDNA binding. An ssDNA can be fitted on the concavities and further stabilized through interactions with the loops forming flexible lids. It seems likely to play a central role in the binding of ssDNA.

• 社団法人 日本生化学会の論文

著者

• Tsukihara Tomitake

  Institute For Protein Research Osaka University

• Morimoto Yukio

  Department Of Biological Science And Technology Faculty Of Engineering The University Of Tokushima

• Yasuoka Noritake

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• Matsumoto Takashi

  Department of Applied Material Science, Faculty of Integrated Arts and Science, University of Tokushima

• Shibata Naoki

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• Kinebuchi Takashi

  Biology Center, National Institute of Genetics

• Shimamoto Nobuo

  Biology Center, National Institute of Genetics

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