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Published on: August 6, 2020
与KAT7相结合的ACSS2调节了组织素β-基基化,以增强转录的作用
Siyu Wang1, Ziping Niu1, Yingao Zhang1
1Key Laboratory of Breast Cancer Prevention and Therapy (Ministry of Education), Key Laboratory of Immune Microenvironment and Disease (Ministry of Education), The Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, School of Basic Medical Sciences, Tianjin Medical University Cancer Institute and Hospital, Tianjin Medical University, Tianjin 300070, China.
基因组β-基布基化 (Kbhb) 将基因代谢与基因转录联系起来. 这项研究揭示了乙-CoA合成酶短链家族成员2 (ACSS2) 和氨酸乙转移酶7 (KAT7) 形成驱动这种表观遗传过程的轴.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 基 lysine β-hydroxybutyrylation (Kbhb) 是一种连接代谢和基因转录的表观遗传修饰.
- 产生beta-hydroxybutyryl-coenzyme A (BHB-CoA) 的酶途径尚未被阐明,这是Kbhb的必不可少的辅因子.
研究的目的:
- 为了确定负责BHB-CoA合成的分子机制.
- 阐明ACSS2和KAT7在基因素β-基基化中的作用.
- 了解代谢对表观遗传修饰的调节.
主要方法:
- 生物化学测试以确定酶活性 (合成酶和转移酶).
- 染色体免疫沉 (ChIP) 用于识别基因组修饰部位.
- 亚细胞局部化研究 (免疫光,西部斑点) 来追踪酶转位.
- 在不同的代谢条件下分析基因表达和细胞生长.
主要成果:
- 乙-CoA合成酶短链家族成员2 (ACSS2) 作为β-基基-共酶A (BHB-CoA) 合成酶起作用.
- 氨酸乙转移酶7 (KAT7) 作为β-基基转移酶起作用,特别是催化H3K9bhb.
- ACSS2转移到核中,产生BHB-CoA,并与KAT7合作促进H3K9bhb.
- ACSS2-KAT7-H3K9bhb轴调节基因转录,并支持瘤细胞的增殖.
结论:
- 该研究确定ACSS2是BHB-CoA结合酶的创始者,完成了基因素β-基基基化的途径.
- 揭示了一种新的表观遗传调节轴 (ACSS2-KAT7-H3K9bhb),将代谢与转录控制联系起来.
- 这种机制在表观遗传调节和瘤细胞生长中起着至关重要的作用,提供了潜在的治疗点.
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