2011 Fiscal Year Final Research Report
Role of histone modifications on establishing DNA methylation patterns
Project/Area Number |
21570136
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Functional biochemistry
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Research Institution | Osaka University |
Principal Investigator |
SUETAKE Isao 大阪大学, 蛋白質研究所, 准教授 (80304054)
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Project Period (FY) |
2009 – 2011
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Keywords | DNAメチル化 |
Research Abstract |
Dnmt3a creates DNA methylation patterns. Dnmt3a2, an isoform of Dnmt3a, lacks amino-terminal 219 amino acids of Dnmt3a and is highly expressed in germ cells and early embryo. We found that the amino-terminal 219 amino acids shows DNA binding activity and contributes for its localization and for DNA methylation activity. On the other hands, DNA methylation pattern once created is maintained by Dnmt1. We solved crystal structure of mouse Dnmt1(291-1602 amino acids) at 1. 3 A resolution. Notably, in the absence of DNA, the amino-terminal domain responsible for targeting Dnmt1 to replication foci is inserted into the DNA-binding pocket, indicating that this domain must be removed during methylation reaction.
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[Journal Article] Array-based genomic resequencing of human leukemia2010
Author(s)
Yamashita Y, Yuan J, Suetake I, Suzuki H, Ishikawa Y, Choi Y L, Ueno T, Soda M, Hamada T, Haruta H, Takada S, Miyazaki Y, Kiyoi H, Ito E, Naoe T, Tomonaga M, Toyota M, Tajima S, Iwama A, and Mano H
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Journal Title
Oncogene
Volume: 29
Pages: 3723-3731
DOI
Peer Reviewed
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[Presentation] Structural insight into maintenance methylation by mouse DNA methyltransferase 12011
Author(s)
Takeshita, K., Suetake, I., Yamashita, E., Suga, M., Narita, H., Nakagawa, A., Tajima, S.
Organizer
International Union of Crystallography(IUCr)
Place of Presentation
Madrid Spain
Year and Date
20110822-30
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[Presentation] Binding specificities of heterochromatin protein 1a, b, and g to the reconstituted nucleosomes containing tri-methylated lysine 9 histone H32010
Author(s)
Yuichi Mishima, Makoto Watanabe, Toru Kawakami, Yuko Aoki, Hiroshi Kimura, Saburo Aimoto, Osamu Nishimura, Shoji Tajima, Isao Sueta
Organizer
JSPS Sweden-Japan joint colloquium" epigenetics. new horizon in Japan and Scandinavia"
Place of Presentation
nobel forum, karolonska institute, Stockholm
Year and Date
20100906-07
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