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出芽酵母ゲノム健常性に対するイオンビーム照射効果

Effects of ion beam radiation on genome integrity in ${it Saccharomyces cerevisiae}$

布柴 達男*; 平澤 佑啓*; 山内 理子*; 佐藤 勝也; 手島 光平*; 小野寺 威文; 鳴海 一成

Nunoshiba, Tatsuo*; Hirasawa, Yukei*; Yamauchi, Ayako*; Sato, Katsuya; Tejima, Kohei*; Onodera, Takefumi; Narumi, Issei

The LOH (loss of heterozygosity) induction by various ion beam radiations was investigated in diploid ${it Saccharomyces cerevisiae}$. The ion beams $$^{12}$$C$$^{5+}$$, $$^{12}$$C$$^{6+}$$, $$^{4}$$He$$^{2+}$$ and $$^{40}$$Ar$$^{13+}$$ at the lowest dose (75, 75, 200 and 150 Gy, respectively), which had 30-50% lethality, induced LOH with 10-fold higher frequency. The LOH induction was predominantly ($$sim$$90%) resulted from gene conversion or crossover through homologous recombination, and followed by chromosome loss through chromosome mis-segregation. Induction of LOH by $$^{12}$$C$$^{5+}$$ was also examined in ${it S. cerevisiae}$ deficient in AP endonuclease (Apn1), translesion DNA polymerases Pol$$eta$$ encoded by Rad30 and Pol$$zeta$$ encoded by Rev3 and Rev7. Pol$$zeta$$ may be involved in the induction of LOH, because a slight induction of LOH by $$^{12}$$C$$^{5+}$$ was observed in the Rev3-deficient strain.

使用言語

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Japanese

掲載資料名

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JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011

巻

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号

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ページ数

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P. 111

発行年月

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2013/01

発表会議名

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キーワード

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no keyword

特許データ

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PDF

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論文URL

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https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2012-046.pdf

研究データの公開先DOI

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使用施設

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TIARA(イオン照射研究施設)

広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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国際基督教大学

Access

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- Accesses

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