通过酸化Rpd3/HDAC1,PKA在调节基因表达和代谢适应方面发挥着保留作用
Wenjing Dai1, Qi Yu1, Rui Ma1
1State Key Laboratory of Biocatalysis and Enzyme Engineering, National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, College of Life Sciences, Hubei University, Wuhan, Hubei, China.
Nature communications
|April 29, 2025
概括
蛋白激酶A (PKA) 通过调节SAGA复合体来控制代谢适应. PKA 抑制了 Rpd3L/HDAC1 脱乙酶的活性,促进了细胞代谢转移以利用营养.
科学领域:
- 细胞代谢的细胞代谢.
- 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
背景情况:
- 细胞必须将新陈代谢适应营养的可用性.
- 该Spt-Ada-Gcn5-乙转移酶 (SAGA) 复合体调节了代谢基因转录.
- 关联营养传感与SAGA调节的机制尚不清楚.
研究的目的:
- 为了研究细胞外营养变化如何影响SAGA复杂结构和功能.
- 通过SAGA调节阐明蛋白激酶A (PKA) 在代谢适应中的作用.
主要方法:
- 通过Rpd3L复合体进行SAGA脱乙的研究.
- 研究了PKA对Rpd3L脱乙酶活性的抑制作用.
- 通过PKA.对Rpd3L子单位 (Rpd3和Ash1) 的分析酸化.
- 研究了PKA对SAGA二分化和核酶体乙化的影响.
- 评估了PKA和HDAC1在哺乳动物代谢适应中的作用.
主要成果:
- 通过糖糖激活PKA抑制了Rpd3L介导的SAGA亚单元Ada3.3的脱乙烯化.
- 基酸化Rpd3和Ash1,减少Rpd3L与SAGA的相互作用.
- 这促进了SAGA二分化,核酶体乙化和代谢基因转录.
- 甲酸化哺乳动物的HDAC1,抑制其活性并促进TCA循环基因转录.
- 揭示了PKA在代谢适应中的保留作用.
结论:
- PKA充当营养传感器,通过Rpd3L/HDAC1抑制调节SAGA活动.
- 这种调节促进了代谢重编程,从糖解转向三碳酸盐 (TCA) 循环.
- 这些发现突出了酵母和哺乳动物之间代谢适应的保存机制.
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