Integrin Cytoskeleton Link
Integrin Cytoskeleton Link - Related Videos
01:10
Integrins
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2023
Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM. Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
01:15
Activation of Integrins
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2023
Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling." In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
12:52
Use of Shigella flexneri to Study Autophagy-Cytoskeleton Interactions
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Cited by 14 •
2014
To counteract pathogen dissemination, host cells reorganize their cytoskeleton to compartmentalize bacteria and induce autophagy. Using Shigella infection of tissue culture cells, host and pathogen determinants underlying this process are identified and characterized. Using zebrafish models of Shigella infection, the role of discovered molecules and mechanisms are investigated in vivo.
01:18
Polarity of the Cytoskeleton
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2023
The intrinsic polarity of cells can be primarily attributed to two factors- i) the asymmetric accumulation of mobile components such are regulatory molecules and subcellular components across the cell and ii) the orientation of polar cytoskeletal filaments that make up the cytoskeletal networks, specifically microfilaments, and microtubules arranged along the axis of polarity. Interactions between the cytoskeletal filaments are crucial for the establishment and maintenance of the polar nature...
01:33
Introduction to Cytoskeleton
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2023
Overview of the Cytoskeleton The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ̶ microfilaments, microtubules, and intermediate filaments. Each has characteristic features that distinguish them, including the dynamics of their assembly and disassembly, mechanical properties, polarity, and the type of molecular motors associated with them. Earlier, they were thought to be present only in eukaryotic cells; however, their homologs were...
FAQs
Talin and kindlin bind to integrin cytoplasmic tails and promote integrin activation. They also help recruit actin-associated proteins, including vinculin, to developing adhesion complexes. This arrangement connects extracellular matrix engagement with intracellular actin organization, creating a molecular framework that can bear force and coordinate downstream cellular responses.
Vinculin contributes to the connection between activated integrins and the actin cytoskeleton within adhesion complexes. Its recruitment strengthens the mechanical linkage formed after integrin engagement with extracellular matrix proteins. Consequently, adhesion sites can participate in force transmission and provide a structural basis for cellular responses to the physical environment.
Mechanical forces generated or encountered at integrin adhesions can be transmitted through talin-, kindlin-, vinculin-, and actin-associated connections. This force transmission couples physical attachment to signaling, allowing cells to respond to extracellular conditions rather than merely remain attached. The resulting mechanotransduction contributes to changes in spreading, migration, survival, and tissue organization.
The coupling supports several coordinated behaviors, including cell spreading and directed migration. It also contributes to survival signaling and the organization of cells within tissues. Because these outcomes depend on both adhesion and force-sensitive signaling, examining the molecular link helps connect integrin engagement with broader changes in cell shape, movement, and tissue structure.
A useful analysis follows the sequence from extracellular matrix binding to integrin activation, recruitment of talin and kindlin, and association with actin-linked proteins such as vinculin. Researchers can then relate these molecular events to force transmission and signaling outcomes. This framework helps interpret how adhesion complexes form and how they influence cellular behavior.
Its importance extends beyond isolated adhesion events because it helps explain how cells organize and respond during development, wound repair, and tissue formation. The same connection is relevant to cancer invasion, where altered adhesion, migration, and environmental sensing can affect tissue behavior. Studying it therefore links molecular cell biology with major physiological and disease-related processes.