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Nucleic Acids Res:武大杜海宁课题组发现核蛋白在应急条件下的自噬降解新途径

2017-03-19 佚名 武汉大学生命科学学院

近日,国际著名学术期刊Nucleic Acids Research (IF:9.202)在线发表了武汉大学杜海宁课题组的最新研究成果。论文题目为“Gcn5-mediated Rph1 acetylation regulates its autophagic degradation under DNA Damage Stress”(乙酰转移酶Gcn5介导的乙酰化修饰调控组蛋白去甲基化酶Rph1在DN

近日,国际著名学术期刊Nucleic Acids Research (IF:9.202)在线发表了武汉大学杜海宁课题组的最新研究成果。论文题目为“Gcn5-mediated Rph1 acetylation regulates its autophagic degradation under DNA Damage Stress”(乙酰转移酶Gcn5介导的乙酰化修饰调控组蛋白去甲基化酶Rph1在DNA损伤应急下的自噬降解)。博士生李锋为论文的第一作者,杜海宁教授为论文的通讯作者,研究生郑亮德、陈欣,武大生命科学院的赵晓璐副教授和美国普渡大学的Scott D. Briggs教授共同参与了该项研究。



许多与损伤修复相关基因的表达在细胞生命过程中被严格调控:在正常条件下表达被抑制,而在DNA损伤刺激下表达被激活。组蛋白去甲基化酶Rph1可以抑制很多环境应急及自噬相关基因的表达,但是Rph1在应急条件下是如何被调控的尚不清楚。课题组的研究人员发现,在DNA损伤刺激下,酿酒酵母中的组蛋白修饰酶Rph1会通过自噬途径降解,以解除对DNA损伤基因的抑制。乙酰转移酶Gcn5介导的乙酰化修饰能够有效调控Rph1的出核过程并进入胞质中的自噬体进行蛋白质降解。这种调控机制对于DNA损伤信号通路的激活和细胞内稳态环境的维持都是必需的。我们的研究提示,乙酰化介导的自噬降解途径很可能代表着一种清除受损细胞器和DNA损伤修复相关抑制因子的广泛机制。

该研究得到了国家自然科学基金、国家重大科学研究计划、湖北省自然科学基金和武汉大学大型仪器开放补贴的资助。

原始出处:
Feng Li, Liang-De Zheng, Xin Chen,et al. Gcn5-mediated Rph1 acetylation regulates its autophagic degradation under DNA damage stress. Nucleic Acids Res 2017

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    2017-08-02 wodejia-dayu
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    2017-09-16 xlxchina
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