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Related Concept Videos

Integrins01:10

Integrins

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,...
Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Activation of Integrins01:15

Activation of Integrins

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.
Cytoskeletal Linker Proteins - Plakins01:09

Cytoskeletal Linker Proteins - Plakins

Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at cell junctions. Plakin functions are evolutionarily conserved and are primarily involved in organizing the different components of the cytoskeleton by crosslinking them to each other and connecting them to the cell-matrix and cell adhesion complexes. They are also known to interact with signal transducers, serve as scaffolds for signaling...
Phosphoinositides and PIPs01:42

Phosphoinositides and PIPs

Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...

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Related Experiment Video

Updated: May 9, 2026

A Flow Cytometry-Based High-Throughput Technique for Screening Integrin-Inhibitory Drugs
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A Flow Cytometry-Based High-Throughput Technique for Screening Integrin-Inhibitory Drugs

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ILK: a pseudokinase with a unique function in the integrin-actin linkage.

Sushmita Ghatak1, Jessica Morgner, Sara A Wickström

  • 1Paul Gerson Unna Group 'Skin Homeostasis and Ageing' Max Planck Institute for Biology of Ageing, Joseph-Stelzmann Strasse 9b, 50937 Cologne, Germany.

Biochemical Society Transactions
|July 19, 2013
PubMed
Summary

Integrin-linked kinase (ILK) is key to cell adhesion and migration. This review covers ILK structure, function, and the ongoing debate about its kinase activity.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Integrin-linked kinase (ILK) is a crucial protein in cell-matrix adhesions.
  • It regulates integrin function and the linkage between integrins and the actin cytoskeleton.
  • ILK forms the IPP complex with PINCH and parvin, impacting cell migration and matrix remodeling.

Purpose of the Study:

  • To review recent advances in the structural and functional characterization of ILK.
  • To discuss the ongoing scientific debate regarding ILK's kinase activity.

Main Methods:

  • Literature review of recent research on ILK.
  • Analysis of structural and functional data.
  • Discussion of experimental evidence concerning ILK's enzymatic activity.

Main Results:

  • ILK plays a central role in integrin-mediated cell adhesion and cytoskeletal organization.
  • The IPP complex (ILK-PINCH-parvin) is essential for regulating cell migration and matrix dynamics.
  • Evidence regarding ILK's kinase activity remains debated within the scientific community.

Conclusions:

  • ILK is a vital regulator of cell adhesion and cytoskeletal dynamics.
  • Further research is needed to fully elucidate ILK's precise functions and enzymatic properties.
  • Understanding ILK is critical for insights into cell migration and tissue remodeling processes.