Integrin Clustering
Integrin Clustering - 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.
10:37
Spatial Separation of Molecular Conformers and Clusters
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Cited by 3 •
2014
We present a technique that allows the spatial separation of different conformers or clusters present in a molecular beam. An electrostatic deflector is used to separate species by their mass-to-dipole moment ratio, leading to the production of gas-phase ensembles of a single conformer or cluster stoichiometry.
01:20
Cluster Sampling Method
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2023
Appropriate sampling methods ensure that samples are drawn without bias and accurately represent the population. Because measuring the entire population in a study is not practical, researchers use samples to represent the population of interest. To choose a cluster sample, divide the population into clusters (groups) and then randomly select some of the clusters. All the members from these clusters are in the cluster sample. For example, if you randomly sample four departments from your...
01:45
Vesicular Tubular Clusters
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2023
After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi. With the help of motor proteins such...
FAQs
Ligand binding provides an initial anchor, after which integrins can move laterally within the plasma membrane. Cytoplasmic adaptor proteins, including talin and kindlin, help organize these receptors and connect them with actin. This coordinated assembly converts individual receptor-ligand interactions into stronger, organized adhesion sites that can support signaling and changes in cell behavior.
Talin and kindlin act as intracellular organizing components associated with integrins after extracellular engagement. Their participation helps connect clustered receptors to the actin cytoskeleton, creating a physical and signaling link between the cell surface and the cell interior. This linkage supports adhesion strengthening and allows receptor organization to influence spreading, migration, and mechanosensing.
Bidirectional signaling means information can pass from the extracellular matrix through integrins into the cell and from intracellular adaptor and cytoskeletal systems back toward receptor behavior. This reciprocal communication allows cells to adjust adhesion and organization as their environment changes. Consequently, integrin assemblies can coordinate external attachment with intracellular responses such as spreading, migration, proliferation, and differentiation.
Clustered integrins organize extracellular attachment with cytoplasmic adaptor proteins and actin, creating a structural route through which cells can detect features of their surroundings. This organization is relevant to mechanosensing because receptor arrangement links the cell surface to internal architecture. Studying clustering therefore helps explain how environmental information is translated into changes in adhesion, spreading, migration, or differentiation.
A focused investigation can examine the sequence from extracellular-matrix ligand binding to lateral receptor organization, adaptor association, actin connection, and downstream cellular behavior. Researchers can then relate the observed receptor assemblies to adhesion strength, spreading, migration, mechanosensing, proliferation, or differentiation. This progression connects molecular-scale receptor behavior with broader cellular outcomes without treating clustering as an isolated event.
The process is especially relevant when cells must attach, move, sense their surroundings, or change state within organized tissues. Its biological context includes wound healing, development, immune-cell trafficking, and cancer progression. Examining receptor organization in these settings can connect molecular adhesion mechanisms with tissue organization and help clarify how altered cell-environment interactions influence disease-related behavior.