Related Experiment Video
Updated: Jul 6, 2026

10:57
Examining the Dynamics of Cellular Adhesion and Spreading of Epithelial Cells on Fibronectin During Oxidative Stress
Published on: October 13, 2019
Studies of focal adhesion assembly
1Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK. idc@bioch.ox.ac.uk
Biochemical Society Transactions
|March 28, 2008
Summary
Focal adhesion proteins like fibronectin and integrins assemble through modular structures and flexible regions. These features allow for controlled interactions, crucial for cellular processes.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Focal adhesions are critical cellular structures mediating cell-matrix and cell-cell interactions.
- Understanding the assembly of focal adhesions is key to deciphering cellular signaling and mechanics.
Purpose of the Study:
- To review recent findings on proteins involved in focal adhesion formation.
- To highlight structural features enabling regulated assembly of focal adhesion complexes.
Main Methods:
- Literature review of studies on fibronectin, integrins, talin, Dok1, and filamin.
- Analysis of protein structural characteristics and their functional implications.
Main Results:
- Identified key proteins: fibronectin, integrins, talin, Dok1, and filamin.
- Highlighted modular protein construction and flexible regions as critical for assembly.
- Demonstrated how conformational masking and phosphorylation modulate interaction affinities.
Conclusions:
- The regulated assembly of focal adhesions relies on specific protein features.
- Protein modularity and adaptable interaction sites are essential for dynamic complex formation.
Related Concept Videos
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...
Some...
Formation of Higher-order Actin Filaments
The polymerization of G-actin monomers into filamentous F-actin is a multi-step process. Once the F-actins are formed, they can bundle together in different arrangements to form higher-order networks and regulate cellular functions. Common examples include the formation of lamellipodia and filopodia at the cell's leading edge by actin reorganization in a migrating cell. The microvilli on the brush border epithelial cells are also formed through the F-actin network.
The high-order actin networks...
The high-order actin networks...
Tension Response at Adherens Junctions
The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin homology) domains...
α-Catenin as a Mechanosensory Protein
The α-catenin of adherens junctions is an allosteric protein with three VH (vinculin homology) domains...
Adherens Junctions
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types – adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
The endothelial cells...
Adherens Junctions are Dynamic
The endothelial cells...
Anchoring Junctions
Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
Mechanism of Filopodia Formation
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...

