细胞核核核糖蛋白哈普洛因不足会影响线粒体形态和呼吸
Agustian Surya1, Blythe Marie Bolton1, Reed Rothe1
1Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA.
bioRxiv : the preprint server for biology
|April 25, 2024
概括
核糖体蛋白质基因损失会损害线粒体功能和能量生产. 细胞适应了氧化应激抵抗的增加,这表明在遗传应激下维持细胞健康的机制得到了保护.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
- 生物化学 生化学
背景情况:
- 核糖体蛋白质组成对于细胞能量恒温至关重要.
- 核糖体蛋白基因的不平衡,在疾病和癌症中见到,影响线粒体功能.
- 核糖体蛋白质基因脱不足对线粒体的确切影响尚未完全理解.
研究的目的:
- 为了研究核糖体蛋白质基因哈普洛缺陷对线粒体形态,功能和细胞应激反应的影响.
- 探索连接核糖体机械和线粒体能量生产的保存机制.
主要方法:
- 使用的 *Caenorhabditis elegans* 模型具有对核糖体蛋白质基因 (*rps-10,rpl-5,rpl-33,rps-23*) 的哈普洛缺陷.
- 分析了人类淋巴细胞和白血病细胞的相应减少.
- 评估了线粒体形态,ATP生成,氧气消耗,氧化应激抵抗,以及基因/蛋白质表达.
主要成果:
- 在核糖体蛋白突变体中观察到线粒体形态变化和氧化应激抵抗力的增加.
- 在*rps-10*缺陷模型 (C. elegans*和人类细胞) 中,已证明线粒体活动,能量水平和氧气消耗降低.
- 发现电子运输链组件的翻译效率在响应于核糖体蛋白质基因减少时发生变化.
结论:
- 核糖体蛋白脱不足会影响线粒体生理学和适应性应激反应.
- 一个保守的机制在遗传压力下调整了线粒体组件的合成.
- 这项研究强调了蛋白质合成机械和线粒体能量生产之间的相互作用.
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