相关实验视频
Updated: Jul 19, 2025
11:19
Spatiotemporal Analysis of Cytokinetic Events in Fission Yeast
Published on: February 20, 2017
7.4K
在SCHIZORIZA域功能分析中,确定了其在细胞命运分离中的特定作用的要求
Renan Pardal1, Ben Scheres1, Renze Heidstra1
1Cluster of Plant Developmental Biology, Laboratory of Molecular Biology, Wageningen University & Research, 6708 PB, Wageningen, The Netherlands.
Plant physiology
|August 16, 2023
概括
这种SCHIZORIZA (SCZ) 基因对于植物根的发育至关重要,控制细胞命运和组织模式. 它的DNA结合域是这一作用的关键,这表明SCZ作为转录抑制剂.
科学领域:
- 植物生物学 植物生物学
- 发育遗传学的发展遗传学.
- 分子生物学分子生物学
背景情况:
- 胚胎后的植物发育依赖于不对称的细胞分裂和组织和器官形成的命运分离.
- 在阿拉比多普西斯SCHIZORIZA (SCZ) 中的突变破坏了根的发育,导致额外的内皮层和异常细胞分化.
- SCZ表现出非自主功能,影响其未表达的组织.
研究的目的:
- 阐明热冲击转录因子 (HSFB) SCZ蛋白质的特定域,该蛋白质负责其在阿拉比多普西斯树根模式中的发育作用.
- 了解SCZ的域组成如何为其超出典型应激反应的功能做出贡献.
主要方法:
- 通过域互换和向突变产生具有改变SCZ蛋白质的突变阿拉比多普西斯植物.
- 在修改后的SCZ线上分析根部发育和组织特征.
- 调查SCZ的转录调节活动.
主要成果:
- SCZ的DNA结合域被确定为其在根模式中的发育功能的主要决定因素.
- 有证据表明,SCZ作为非运动性转录抑制剂起作用.
- SCZ的作用超越了应激反应,突出了HSF家族内的进化可塑性.
结论:
- 该DNA结合域对于SCZ在建立适当的Arabidopsis根架构中的功能至关重要.
- SCZ的非自治行动和镇压活动为其复杂的监管机制提供了洞察力.
- 这项研究扩展了已知的热冲击转录因子的功能,证明了它们在发育过程中的参与.
相关概念视频
02:13Determining the Plane of Cell Division
3.4K
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
3.4K
02:02Meiosis II
45.9K
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,...
45.9K
01:21Cell Polarization by Rho Proteins
2.7K
Cell polarity is the asymmetric distribution of cellular and membrane components, making one side of the cell different from the other. This polarity is essential to many processes such as embryogenesis, axon migration, glucose transport across epithelial cells, and directional cell migration. A migrating cell responds to intracellular or extracellular signals via molecular cascades that reorganize the actin cytoskeleton to establish this polarity. In these cells, the Rho family proteins Cdc42,...
2.7K
02:45The Ratio of X Chromosome to Autosomes
8.6K
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...
8.6K
01:27Molecular Factors Affecting Cell Division
3.2K
Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
3.2K
02:26Conservation of Protein Domains Over Different Proteins
10.9K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
10.9K