基因素-7 CENP-E 调解染色体对齐和间隙分裂 I 中的螺旋组合检查点
Jing-Lian Zhang1,2, Meng-Fei Xu1,2, Jie Chen1,2
1Department of Cell Biology and Genetics, The School of Basic Medical Sciences, Fujian Medical University, Fuzhou, 350122, Fujian, China.
Chromosoma
|March 8, 2024
概括
中心分子相关蛋白E (CENP-E) 对于男性半半变异至关重要,确保了正确的染色体对齐和组装. 它的抑制会导致精子生成的缺陷,影响精子数量和质量.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
- 生殖生物学 生殖生物学
背景情况:
- 半转化对于性繁殖,染色体稳定性和真核生物的进化至关重要.
- 介质变化中的缺陷会导致体积,雌同体数量减少和遗传疾病.
- 基因素-7 CENP-E 调节染色体对齐和螺旋组合检查点,但其在男性半导体变异中的作用尚不清楚.
研究的目的:
- 调查CENP-E在男性半月变异中的功能和机制.
- 为了阐明CENP-E在染色体对齐和精子细胞中螺杆组装中的作用.
- 确定CENP-E对精子生成和精子质量的影响.
主要方法:
- 在老鼠丸中检查了CENP-E基因表达.
- 在老鼠精子细胞中抑制CENP-E功能.
- 分析了染色体对齐,轴心组织和轴心组装检查点的激活.
- 评估了精子生成,精子数和精子形态.
主要成果:
- 在大鼠丸中,CENP-E的表达很高.
- 在CENP-E抑制中,会在元相I中破坏同类染色体对齐和组织.
- 在CENP-E抑制后,错位染色体激活了螺旋组装检查点.
- CENP-E 枯竭导致异常的精子生成,精子数量减少和异常的精子头部结构.
结论:
- 在精子细胞中,CENP-E对于同类染色体对齐和螺旋组装检查点至关重要.
- 在精子生成过程中,CENP-E在维持染色体稳定性方面发挥着关键作用.
- 适当的CENP-E功能对于确保精子细胞质量至关重要.
更多相关视频
12:26Identification of Cyclin-dependent Kinase 1 Specific Phosphorylation Sites by an In Vitro Kinase Assay
Published on: May 3, 2018
18.6K
11:49Author Spotlight: Establishing CENP-E Knockout HeLa Cells – A Novel Approach to Study Kinesin-7 CENP-E Biology and its Inhibitors
Published on: June 23, 2023
702
相关概念视频
02:19The Spindle Assembly Checkpoint
3.2K
The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
3.2K
02:50Spindle Assembly
3.7K
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...
3.7K
02:27The Mitotic Spindle
6.6K
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...
6.6K
02:02Meiosis II
45.6K
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
45.6K
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
02:57Attachment of Sister Chromatids
3.3K
As cells progress into mitosis, the nuclear envelope breaks down, and the condensed chromosomes are exposed to the array of bipolar microtubules of the mitotic spindle. The kinetochore, a large, disc-shaped protein complex, is present at the centromere region of the sister chromatids and acts as a binding site for the microtubules. Usually, the plus-end of a single microtubule is embedded within the kinetochore. However, some kinetochores first establish lateral contact with the side-wall...
3.3K