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相关概念视频

Disassembly of Intermediate Filaments01:35

Disassembly of Intermediate Filaments

2.1K
Intermediate filaments (IFs) do not undergo spontaneous disassembly. Enzymes, kinases, and phosphatases add and remove phosphates from specific sites to regulate their disassembly. The IF concentration in the cytoplasm also regulates the disassembly. If the concentration crosses a threshold, it activates the protein kinases in the vicinity, allowing the phosphorylation of IFs.
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
2.1K
Formation of Intermediate Filaments00:57

Formation of Intermediate Filaments

3.1K
Intermediate filaments are cytoskeletal proteins with higher tensile strength and flexibility than microfilaments and microtubules. Unlike the other two cytoskeletal proteins, intermediate filament formation lacks the enzymatic activity to hydrolyze nucleotides like ATP and GTP to generate energy for polymerization. Therefore, the formation of intermediate filaments is multistep self-assembly. The involvement of any accessory proteins in intermediate filament formation has not yet been...
3.1K
Types of Intermediate Filaments01:31

Types of Intermediate Filaments

3.7K
The intermediate filaments are an essential component of the cytoskeleton. Presently six types of intermediate filament have been identified. Type I and II are acidic and basic keratin proteins. Type III is of mesodermal origin and comprises four proteins: vimentin, desmin, glial fibrillary acidic protein (GFAP), and peripherin. Vimentin is commonly found in mesenchymal cells, desmin in muscle cells, GFAP in astrocytes, while peripherin is found in peripheral nervous system neurons (PNS). Type...
3.7K
The Structure of Intermediate Filaments01:19

The Structure of Intermediate Filaments

4.1K
The intermediate filaments are one of three widely studied cytoskeletal filaments. They are so named as their diameter (10 nm) is in between that of microfilaments (7 nm) and the microtubules (25 nm).  These filaments are highly stable and can remain intact when exposed to high salt concentrations and detergents. These filaments are responsible for providing stability and mechanical support to the cells. They also help in cell adhesion and maintaining tissue integrity.
Intermediate...
4.1K
Adaptability of Cytoskeletal Filaments01:12

Adaptability of Cytoskeletal Filaments

3.8K
The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments in the cytoskeleton determines their ability to perform various functions within the cell. It can undergo rapid reorganization during processes like cell division or remain stable for several hours as in the interphase. The adaptability of these filaments depends on stringent regulatory mechanisms. The microfilament and microtubules of the...
3.8K
Destabilization of Microtubules01:45

Destabilization of Microtubules

2.8K
The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
2.8K

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相关实验视频

Updated: Jul 27, 2025

Using Microfluidics and Fluorescence Microscopy to Study the Assembly Dynamics of Single Actin Filaments and Bundles
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Using Microfluidics and Fluorescence Microscopy to Study the Assembly Dynamics of Single Actin Filaments and Bundles

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在中介灯光线网络中发生的扰动.

Florian Geisler1, Sanne Remmelzwaal2, Vera Jankowski3

  • 1Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany.

eLife
|June 7, 2023
PubMed
概括

介质纤维 (IFs) 组织细胞结构. 在Caenorhabditis elegans突变体中抑制异常的IF网络纠正了结构和功能缺陷,揭示了IF网络在细胞和组织功能中的重要性.

关键词:
这里是C. elegans.细胞生物学 细胞生物学输入管的末端管子中间灯丝是中间的灯丝.我们的肠道是肠道.

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Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy
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Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy

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Isolation of Intermediate Filament Proteins from Multiple Mouse Tissues to Study Aging-associated Post-translational Modifications
09:29

Isolation of Intermediate Filament Proteins from Multiple Mouse Tissues to Study Aging-associated Post-translational Modifications

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相关实验视频

Last Updated: Jul 27, 2025

Using Microfluidics and Fluorescence Microscopy to Study the Assembly Dynamics of Single Actin Filaments and Bundles
08:02

Using Microfluidics and Fluorescence Microscopy to Study the Assembly Dynamics of Single Actin Filaments and Bundles

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Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy
14:23

Imaging Intermediate Filaments and Microtubules with 2-dimensional Direct Stochastic Optical Reconstruction Microscopy

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Isolation of Intermediate Filament Proteins from Multiple Mouse Tissues to Study Aging-associated Post-translational Modifications
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科学领域:

  • 细胞生物学 细胞生物学
  • 细胞骨动力学 细胞骨动力学
  • 分子遗传学 分子遗传学

背景情况:

  • 介质纤维 (IFs) 是甲基动物中关键的细胞骨组成部分.
  • 一个关键的辩论是IF网络组织是否决定或仅仅反映了细胞功能.
  • 基激活蛋白激酶 (MAPK) SMA-5中的突变物破坏了肠道IF组织,导致结构和功能缺陷.

研究的目的:

  • 研究IF网络组织在细胞和组织功能中的作用.
  • 确定因异常的IF网络造成的结构和功能缺陷的抑制因素.
  • 阐明IF网络组织受到监管的机制.

主要方法:

  • 使用Caenorhabditis elegans作为一个模型生物体.
  • 产生和分析影响IF网络组织的突变物 (sma-5突变物).
  • 评估IF多IFB-2对结构和功能表型的影响.

主要成果:

  • IF多IFB-2通过解决异常的IF网络,有效地抑制sma-5突变者的结构和功能缺陷.
  • 扰乱的IF网络形成与IFB-2的过酸化有关.
  • IFB-2的救援活动是IF异型特异性的,并且对其他影响细胞骨连接器 (IFO-1) 和IF相关蛋白质 (BBLN-1) 的突变有效.

结论:

  • 失调的IF网络对细胞和组织功能有不利影响.
  • IF网络组织在维持细胞和生物体健康方面发挥着至关重要的作用.
  • 这些发现对与改变的IF网络组织相关的疾病有影响.