希斯甲基转移酶SUV39H1通过跨越核外的LINC复合体调节戈尔吉复合体
Miyu Nishino1, Hiromasa Imaizumi2,3, Yuhki Yokoyama2
1Graduate School of Health Sciences, Ehime Prefectural University of Health Sciences, Ehime, Japan.
PloS one
|July 12, 2023
概括
失去SUV39H1会破坏戈尔吉组织,损害细胞迁移. 这种与染色体相关的过程涉及LINC复合体,SUN2,nesprin-2和KIF20A,为细胞运动调节提供了新的见解.
科学领域:
- 细胞生物学 细胞生物学
- 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:
- 细胞运动对于各种生物过程至关重要,与染色体组织有关.
- 基质子修饰,如H3K9me3,与调节染色质结构和细胞迁移有关.
- 连接染色质组织与细胞迁移的精确分子机制仍然不完全理解.
研究的目的:
- 阐明链接染色体组织的分子机制,特别是素H3氨酸9三甲基化 (H3K9me3),以细胞运动.
- 研究基因甲基转移酶SUV39H1在戈尔吉器官组织中的作用及其对细胞迁移的影响.
- 确定参与SUV39H1调节戈尔吉组织和细胞运动的关键蛋白质.
主要方法:
- 使用显微镜研究SUV39H1枯竭对戈尔吉器官形态学的影响.
- 评估了转录,中心体和微管组织在SUV39H1耗尽诱导的戈尔吉分散中的参与.
- 利用siRNA介导的LINC复合元件 (SUN2,nesprin-2) 和KIF20A的枯竭来研究它们在戈尔吉组织和细胞迁移中的作用.
- 分析了SUN2相对于H3K9me3的局部,以及SUV39H1对SUN2移动性的影响.
主要成果:
- SUV39H1的耗尽,但不是SETDB1或SETDB2,导致戈尔吉装置在整个细胞质中分散.
- 由SUV39H1损失引起的戈尔吉分散独立于转录,中心体和微管组织.
- 耗尽SUN2,nesprin-2或KIF20A抑制SUV39H1耗尽诱导的戈尔吉分散和恢复细胞运动.
- SUV39H1的耗尽影响了SUN2在核外的移动性,而SUN2显示出与H3K9me3.3接近的局部化.
结论:
- SUV39H1在维持戈尔吉器官组织方面发挥着至关重要的作用,这对于定向细胞迁移至关重要.
- 该LINC复合物的组成部分SUN2和nesprin-2,以及KIF20A,是SUV39H1依赖调节戈尔吉组织和细胞运动的关键调解者.
- 这些发现揭示了染色体组织 (通过H3K9me3和SUV39H1) 和通过LINC复合体调节戈尔吉器官定位的细胞运动之间的新型功能联系.
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