Integrin Family
Integrin Family - Related Videos
02:47
Protein Families
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2020
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
01:57
Gene Families
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2020
Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate. Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
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.
01:30
Family Therapy
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2025
Family therapy conceptualizes psychological challenges as arising from dysfunctional interactions within the family unit, rather than as isolated issues within individuals. This approach seeks to address and transform the patterns of communication, roles, and relationships within families to promote healthier dynamics and emotional well-being for all members. Strategic Family Therapy Strategic family therapy emphasizes resolving communication barriers and improving problem-solving abilities...
FAQs
Ligand binding can shift an integrin into a different conformation, changing how the receptor functions at the cell surface. The reverse direction also occurs: signals originating inside the cell can alter the receptor’s ligand-binding affinity. This bidirectional control allows cells to adjust adhesion and signaling according to both extracellular conditions and internal cellular state.
Each integrin contains one alpha and one beta subunit joined through noncovalent interactions. This paired structure creates the functional receptor that responds to extracellular ligands and transmits information across the membrane. Studying the subunits as a heterodimer is therefore essential for understanding how integrins coordinate adhesion, cytoskeletal connections, and downstream cellular responses.
Adaptor proteins provide the molecular link between integrins and the actin cytoskeleton. Through this connection, forces and adhesion-related signals at the cell surface can influence internal cell organization and behavior. The resulting signaling affects processes such as survival, proliferation, migration, and differentiation, making cytoskeletal linkage a central part of integrin function.
Bidirectional signaling means that integrins do more than pass information from an external ligand into the cell. External binding can change receptor conformation, while intracellular signals can modify receptor affinity. This two-way regulation helps coordinate adhesion with the cell’s current functional state, supporting controlled movement, tissue organization, and responses to changing biological environments.
Integrin activity can be examined through biological processes that depend on coordinated adhesion and signaling, including tissue organization, cell movement, survival, proliferation, and differentiation. These functions connect receptor behavior to broader cellular outcomes. Comparing integrin activity across such processes can help clarify how the same receptor family contributes to different aspects of biology.
During development, immune responses, and wound healing, cells must organize, move, and respond to signals in their surroundings. Integrins contribute to these processes by coordinating extracellular interactions with cytoskeletal connections and intracellular pathways. Their involvement makes the family relevant for investigating how cells assemble tissues, participate in defense, and support tissue repair.
Integrins are important in cancer research because they regulate signaling pathways associated with survival, proliferation, migration, and differentiation. These activities can be studied in relation to how cells organize and move within tissues. Their broad influence on cell behavior also makes integrins potential therapeutic targets when researchers seek strategies that affect cancer-related cellular functions.