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Related Concept Videos

Assembly of Complex Microtubule Structures01:32

Assembly of Complex Microtubule Structures

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Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
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Microtubule Instability02:17

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Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
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There are three types of cytoskeletal structures in eukaryotic cells—microfilaments, intermediate filaments, and microtubules. With a diameter of about 25 nm, microtubules are the thickest of these fibers. Microtubules carry out a variety of functions that include cell structure and support, transport of organelles, cell motility (movement), and the separation of chromosomes during cell division.
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Microtubules in Cell Motility01:24

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Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
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Microtubules are dynamic structures that undergo continuous assembly and disassembly. They originate from specialized multi-protein complexes known as microtubule organizing centers or MTOCs. Within the MTOC, the point of origin of the microtubule is known as the minus end, while the end radiating outward is the plus end. Microtubules serve two primary functions — the organization of spindle complexes to separate sister chromatids during mitotic or meiotic cell division and the formation...
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Microtubule Associated Proteins (MAPs)01:42

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Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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Updated: Sep 30, 2025

Self-Assembly of Microtubule Tactoids
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Microtubule Organization Is Essential for Maintaining Cellular Morphology and Function.

Lijiang Huang1, Yan Peng2, Xuetao Tao3

  • 1The Affiliated Xiangshan Hospital of Wenzhou Medical University, No. 291 Donggu Road, Xiangshan County, Zhejiang 315000, China.

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Microtubules (MTs) are crucial for nerve cell function and regeneration. Microtubule-associated proteins (MAPs) stabilize MTs, and their dysfunction is linked to neurodegenerative diseases, with new therapies targeting MTs under development.

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Area of Science:

  • Cell Biology
  • Neuroscience
  • Biochemistry

Background:

  • Microtubules (MTs) are dynamic polymers vital for cellular functions including intracellular transport, cell division, and morphogenesis.
  • Neuronal MT stability is critical for neurodevelopment, degeneration, and regeneration.
  • Microtubule-associated proteins (MAPs) regulate MT organization and function in the nervous system.

Purpose of the Study:

  • To provide an overview of MT intrinsic organization and MAP interactions.
  • To highlight recent advances in MT-targeting therapeutic agents for neurological disorders.
  • To increase understanding of MT organization in nerve growth and regeneration.

Main Methods:

  • Review of existing literature on microtubule dynamics and MAPs.
  • Analysis of the role of MT cytoskeleton disruption in neurological diseases.
  • Examination of current and emerging MT-targeting therapeutic strategies.

Main Results:

  • MT disruption, characterized by reduced polymerization and MAP expression, is a key feature of nerve damage and neurodegeneration.
  • MAPs promote MT polymerization, stabilization, and bundling.
  • MT-targeting agents show therapeutic potential for neurological disorders.

Conclusions:

  • Understanding MT organization and MAP function is essential for addressing neurological abnormalities.
  • Therapeutic strategies targeting MTs offer a promising avenue for treating nerve damage and neurodegenerative diseases.
  • Further research into MT dynamics and MAPs can advance nerve regeneration therapies.