基因素-7 CENP-E介导着中枢细胞组织和螺旋组合,以调节染色体对齐和基因组稳定性
Jie Chen1,2, Shan Wu1,2, Jie-Jie He1,2
1Department of Cell Biology and Genetics, The School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, China.
Cell proliferation
|September 12, 2024
概括
中心相关蛋白E (CENP-E) 对于细胞分裂至关重要. 它的缺失导致染色体错位,基因组不稳定性和形缺陷,突出显示CENP-E.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 染色体对齐和分离对于细胞周期的进展和基因组的稳定性至关重要.
- 基因素-7 CENP-E 是一种已知的运动蛋白质,它对染色体生物定向和线性分裂过程中的对齐至关重要.
研究的目的:
- 研究CENP-E在缺少蛋白质的情况下染色体对齐和分离中的作用.
- 阐明CENP-E调节线粒分裂并保持基因组稳定性的机制.
主要方法:
- 在CRISPR-Cas9基因编辑中创建CENP-E淘汰细胞系.
- 高通量选以确定表型变化.
- 使用脏组织进行体内研究,以评估整个生物体中的影响.
主要成果:
- 删除CENP-E会导致染色体聚集,对齐和分离的重大缺陷,从而导致动积分和基因组不稳定.
- 丢失CENP-E会导致轴心杆分散,多极轴心形成,以及整体轴心混乱.
- 在体内CENP-E的异构切除会导致淋巴细胞积累和细胞循环停止.
- 缺少CENP-E会破坏动态蛋白的定位,并激活螺旋组装检查点.
结论:
- CENP-E对于适当的动脉-微管附着和螺旋杆组织至关重要.
- 在细胞分裂过程中,CENP-E在调节染色体对齐和组装检查点方面发挥着至关重要的作用.
- 这些发现强调了CENP-E在维护基因组完整性方面的重要性.
相关概念视频
02:50Spindle Assembly
3.6K
Spindle assembly occurs through three, often coexisting, pathways – the centrosome-mediated pathway, the chromatin-mediated pathway, and the microtubule-mediated pathway – collectively contributing to form a robust spindle apparatus.
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
In most cells, centrosomes are the primary microtubule nucleation centers. In the centrosome-mediated pathway, the G2-prophase transition triggers centrosome maturation and increased microtubule nucleation. Progressive nucleation results in a...
3.6K
02:11Forces Acting on Chromosomes
3.3K
During mitosis, chromosome movements occur through the interplay of multiple piconewton level forces. In prometaphase, these forces help in chromosome assembly or congression at the equatorial plane, eventually leading to their alignment at the metaphase plate. The forces acting on the chromosomes are space and time-dependent; therefore, they vary with the position of the chromosomes as the cell progresses through mitosis.
Microtubules and motor proteins exert two types of forces on...
Microtubules and motor proteins exert two types of forces on...
3.3K
02:27The Mitotic Spindle
6.5K
The mitotic spindle—or spindle apparatus—is a eukaryotic, cytoskeletal structure made up of long protein fibers called microtubules. Formed during cell division, the spindle separates sister chromatids and moves them to opposite ends of a parental cell, where the now individual chromosomes are distributed to two daughter cell nuclei.
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures...
The bipolar configuration of the mitotic spindle facilitates chromosomal segregation, preparing the cell for division. One mechanism that ensures...
6.5K
01:13Centrioles and Centrosomes
2.6K
Most animal cells comprise a pair of centrioles together called a centrosome. The cell duplicates its centrosome and contains two centrosomes side-by-side, which begin to move apart during the prophase. As the centrosomes migrate to two different sides of the cell, microtubules start extending from each centrosome toward the other end. The mitotic spindle is composed of the centrosomes and their emerging microtubules.
Near the end of the prophase, also called late prophase or...
Near the end of the prophase, also called late prophase or...
2.6K
02:25Centrosome Duplication
4.0K
The primary microtubule organizing center (MTOC) in animal cells is the centrosome. A centrosome has two cylindrical centrioles at its core. Each centriole consists of nine sets of three microtubules held together by proteins. The centrioles are positioned at right angles to each other and surrounded by a shapeless protein cloud called the pericentriolar matrix, or pericentriolar material (PCM).
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
To ensure that each daughter cell receives a centrosome after cell division, centrosome duplication...
4.0K
02:30Histone Variants at the Centromere
4.3K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.3K