相关实验视频
Updated: Jun 27, 2026

09:13
Getting an A with the 3Cs: Chromosome Conformation Capture for Undergraduates
Published on: May 12, 2023
染色体对齐和转向被凝聚素II对抗
Tom A Hartl1, Helen F Smith, Giovanni Bosco
1Department of Molecular and Cellular Biology, University of Arizona, 1007 East Lowell Street, Tucson, AZ 85721-0106, USA.
概括
草凝II分解聚烯染色体,并防止转移,一种基因调节过程. 这表明,凝聚素II在空间上分离染色体以控制转录.
科学领域:
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 多聚染色体的特点是多倍体细胞中对齐的同源DNA序列.
- 转载涉及通过物理相互作用对等位特异的转录调节.
研究的目的:
- 为了研究多烯染色体结构中多烯凝定素II的作用.
- 为了确定凝聚素II对传导和转录调节的影响.
主要方法:
- 在Drosophila中分析聚烯染色体结构.
- 研究凝聚素II对基因表达和等位基因相互作用的影响.
主要成果:
- 康登森II促进了聚烯染色体结构的分解.
- 度素II负面调节了转移,减少了基因基因特异性的转录影响.
- 有证据表明,凝聚素II在空间上分离染色体.
结论:
- 草凝II在分解聚烯染色体方面发挥着关键作用.
- 康登森II对染色体空间组织的调节通过限制染色体间相互作用而影响转录控制.
相关概念视频
Condensins
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
Condensins
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
Forces Acting on Chromosomes
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...
Forces Acting on Chromosomes
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...
Cohesins
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesins
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of homologous...

