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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,...
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.
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...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
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...
Membrane Domains01:18

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the anterior...

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Related Experiment Video

Updated: Jun 4, 2026

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Subcellular spatial segregation of integrin subtypes by patterned multicomponent surfaces.

Ravi A Desai1, Mohammed K Khan, Smitha B Gopal

  • 1Department of Bioengineering, University of Pennsylvania, 210 S. 33rd Street, Philadelphia, PA 19104, USA.

Integrative Biology : Quantitative Biosciences From Nano to Macro
|February 8, 2011
PubMed
Summary
This summary is machine-generated.

Cells can segregate integrins (cell surface receptors) to bind specific extracellular matrix (ECM) proteins. However, these integrins cooperate to enhance cell adhesion and migration on complex surfaces.

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Last Updated: Jun 4, 2026

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
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Mapping the Emergent Spatial Organization of Mammalian Cells using Micropatterns and Quantitative Imaging
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Mapping the Emergent Spatial Organization of Mammalian Cells using Micropatterns and Quantitative Imaging

Published on: April 30, 2019

Imaging Integrin Tension and Cellular Force at Submicron Resolution with an Integrative Tension Sensor
07:20

Imaging Integrin Tension and Cellular Force at Submicron Resolution with an Integrative Tension Sensor

Published on: April 25, 2019

Area of Science:

  • Cell Biology
  • Biomaterials Science
  • Biophysics

Background:

  • Individual integrins mediate cell behavior by binding extracellular matrix (ECM) proteins.
  • Simultaneous engagement of multiple integrin types with the ECM enhances cellular functions.
  • Spatial coordination of integrins for cell adhesion regulation remains poorly understood due to a lack of reliable segregation methods.

Purpose of the Study:

  • To develop a microcontact printing strategy for patterning multiple ECMs to study integrin spatial coordination.
  • To investigate how distinct integrins interact and regulate cell adhesion and migration on multicomponent surfaces.

Main Methods:

  • A novel microcontact printing technique using selective protein "de-inking" from a poly(dimethyl siloxane) stamp.
  • Patterning of multiple ECMs that bind distinct integrins on cell-compatible surfaces.
  • Analysis of integrin spatial segregation and cell adhesion/migration on patterned substrates.

Main Results:

  • The developed microcontact printing strategy successfully patterned multiple ECMs, overcoming limitations of conventional methods.
  • Integrins were observed to spatially segregate on surfaces patterned with distinct ECMs.
  • Cells exhibited robust adhesion and migration on multicomponent surfaces, comparable to single-component surfaces, despite integrin segregation.

Conclusions:

  • Cells possess the ability to spatially segregate distinct integrins for specific ECM binding.
  • Integrins function cooperatively to facilitate cell adhesion and migration, even when spatially segregated.
  • This study provides insights into the coordinated roles of integrins in cell-matrix interactions on complex substrates.