2011 Fiscal Year Final Research Report
Structural biology of protein-protein interactions involved in DNA replication under DNA damage
Project/Area Number |
21370048
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Structural biochemistry
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Research Institution | Yokohama City University |
Principal Investigator |
SATO Mamoru 横浜市立大学, 生命ナノシステム科学研究科, 教授 (60170784)
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Co-Investigator(Kenkyū-buntansha) |
HASHIMOTO Hiroshi 横浜市立大学, 生命ナノシステム科学研究科, 助教 (40336590)
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Project Period (FY) |
2009 – 2011
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Keywords | X線結晶解析 |
Research Abstract |
DNA clamp is involved in various cellular events on DNA including DNA replication, repair and replication, and functions as a scaffold protein in those events. DNA clamp forms a ring-shaped trimer that encircles the DNA double helix and slides freely along the DNA axis. PCNA and RAD9/HUS1/RAD1(9-1-1) are DNA clamp in eukaryote. PCNA is a homo-trimer, whereas 9-1-1 is a hetero-trimer. Each subunit of 9-1-1 is composed of PCNA-like domain. However, RAD9 has an additional domain with a molecular weight of 13 kD in the C-terminus. Structure of 9-1-1 trimer of PCNA-like domains is similar to that of PCNA trimer. In this study, we prepared the C-terminal domain of RAD9CTD and performed structural analysis by small angle X-ray scattering(SAXS). Some archaea have heterotrimeric DNA clamp(PCNA1-PCNA2-PCNA3). We reveals that PCNA2-PCNA3 from Sulfolobus tokodaii forms tetrameric ring structure in solution by SAXS.
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[Journal Article] Identification of a small molecule PCNA inhibitor that disrupts interactions with PIP-Box proteins and inhibits DNA replication2012
Author(s)
Chandanamali Punchihewa, Akira Inoue, Asami Hishiki, Yoshihiro Fujikawa, Michele Connelly, Benjamin Evison, Youming Shao, Richard Heath, Isao Kuraoka, Patrick Rodrigues, Hiroshi Hashimoto, Takashi Yagi, & Naoaki Fujii
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Journal Title
J. Biol. Chem
Volume: 287
Pages: 14289-14300
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