GO:0120181 focal adhesion disassembly: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0120181 focal adhesion disassembly is the biological process by which a focal adhesion complex is broken down into its constituent components.
• Focal adhesion disassembly is spatially asymmetric in motile cells, occurring preferentially at the rear to drive directional migration.
• Key molecular drivers include calpain2-Rab5-mediated integrin recycling, clathrin-dependent endocytosis of integrins, kindlin degradation, and S100A11-Piezo1 calcium signaling.
• Force-dependent computational models show that adhesion assembly and disassembly are governed by actomyosin contractility and mechanical load.
• Dysregulated focal adhesion disassembly contributes to cancer invasion, metastasis, and developmental defects.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of focal adhesion disassembly genes in migration and disease.
Description
Focal adhesions are dynamic multiprotein structures that physically link the actin cytoskeleton to the extracellular matrix (ECM) and serve as signaling hubs. Their controlled formation and turnover are essential for cell migration, tissue morphogenesis, and wound healing. The Gene Ontology term GO:0120181, focal adhesion disassembly, describes the disaggregation of a focal adhesion into its constituent components, a process that must be tightly regulated to allow cells to move and respond to their environment. Disassembly is not simply the reverse of assembly; it is an actively regulated, spatially biased event that requires specific molecular machinery. In motile cells, focal adhesion disassembly occurs asymmetrically, with rear adhesions turning over faster than front adhesions, thereby establishing cell polarity and directional persistence. This asymmetry is driven by factors such as kindlin-2, which promotes rear focal adhesion disassembly and directional migration. Understanding the mechanisms of focal adhesion disassembly is critical because defects in this process are linked to cancer metastasis, impaired wound healing, and developmental abnormalities. Moreover, the process intersects with membrane trafficking, calcium signaling, and cell cycle control, making it a rich area for both basic and translational research.
focal adhesion disassembly At A Glance
| GO ID | GO:0120181 |
|---|---|
| GO term | focal adhesion disassembly |
| Ontology | biological_process |
| Synonym | none |
| Major function | Disaggregation of focal adhesions into constituent components, enabling cell migration and adhesion turnover |
| Cellular context | Occurs at the cell periphery and rear in motile cells, linked to actin cytoskeleton and ECM |
| Key molecular players | Integrins, kindlins, calpain2, Rab5, clathrin, S100A11, Piezo1, myosin II |
| Regulatory inputs | Force, actomyosin contractility, calcium signaling, cell cycle kinases |
| Associated diseases | Cancer invasion and metastasis, developmental defects |
What Is GO:0120181?
According to the Gene Ontology, GO:0120181 focal adhesion disassembly is defined as the disaggregation of a focal adhesion into its constituent components. A focal adhesion is a complex of intracellular signaling and structural proteins that provides a structural link between the internal actin cytoskeleton and the ECM, and also functions as a locus of signal transduction activity. In simpler terms, it is the process by which cells break down their attachment points to the extracellular matrix, allowing them to detach and move.
Why Is focal adhesion disassembly Important in Cell Biology?
Focal adhesion disassembly is fundamental to cell migration, a process required for embryonic development, immune surveillance, and tissue repair. Without efficient disassembly, cells cannot detach from the ECM and move directionally, leading to impaired migration or aberrant retention. The process is also a point of convergence for signaling pathways that control cell cycle progression and mechanotransduction. Because dysregulated adhesion turnover is a hallmark of invasive cancer cells, understanding the molecular mechanisms of focal adhesion disassembly offers potential therapeutic targets for metastasis.
• Enables cell migration by allowing detachment of adhesions at the rear of the cell.
• Establishes cell polarity and directional persistence during migration.
• Required for mitotic entry, as CDK1-cyclin-B1-induced kindlin degradation drives focal adhesion disassembly.
• Involves clathrin-dependent endocytosis of integrins, linking adhesion turnover to membrane trafficking.
• Regulated by calcium signaling through S100A11 and Piezo1, connecting mechanical cues to adhesion disassembly.
• Calpain2 and Rab5 mediate proteolytic and endocytic pathways of disassembly.
• Force-dependent computational models predict that actomyosin contractility governs disassembly rates.
• Dysregulation contributes to cancer cell invasion and metastasis.
• Impacts developmental processes such as tissue morphogenesis.
• Provides targets for therapeutic intervention in migration-related diseases.
What Happens During focal adhesion disassembly?
Initiation by mechanical and biochemical cues
In simple terms: The cell receives signals that tell it to let go of its attachment points.
Focal adhesion disassembly is initiated by a combination of mechanical and biochemical signals. In motile cells, disassembly occurs asymmetrically, with rear adhesions preferentially turning over to allow forward movement. Force-dependent computational studies have shown that actomyosin contractility and mechanical load are key determinants of whether a focal adhesion assembles or disassembles. Additionally, calcium influx through Piezo1 channels, triggered by S100A11, promotes myosin II-driven contractility that contributes to disassembly.
Proteolytic cleavage by calpain2
In simple terms: Enzymes cut apart the proteins that hold the adhesion together.
Calpain2, a calcium-dependent protease, mediates focal adhesion disassembly by cleaving key components such as talin and integrins. This proteolytic activity is driven by Rab5, a small GTPase involved in endosomal trafficking, linking disassembly to vesicle transport. Calpain2-mediated cleavage is a critical step that weakens the adhesion structure and facilitates its breakdown.
Endocytosis of integrins
In simple terms: The cell swallows the adhesion receptors to remove them from the surface.
Clathrin-dependent endocytosis of integrins is required for focal adhesion disassembly. This process removes integrins from the plasma membrane, allowing the adhesion complex to disassemble. The endocytosed integrins can then be recycled to the leading edge to form new adhesions, a cycle essential for persistent migration.
Kindlin degradation and cell cycle control
In simple terms: The cell destroys a key adhesion protein to break the structure apart, especially before cell division.
Kindlin-2 promotes rear focal adhesion disassembly and directional persistence during cell migration. At mitotic entry, CDK1-cyclin-B1 induces kindlin degradation, which drives focal adhesion disassembly and allows cells to round up and divide. This links adhesion turnover to the cell cycle machinery.
Actomyosin contractility and force generation
In simple terms: The cell pulls on the adhesion to rip it apart.
Myosin II-driven contractility generates forces that physically pull on focal adhesions, contributing to their disassembly. S100A11 promotes this contractility via Piezo1-mediated calcium entry. Computational models incorporating force-dependent kinetics have provided quantitative insights into how contractility modulates adhesion lifetime.
Key Genes Involved in GO:0120181 focal adhesion disassembly
The following genes and proteins are experimentally implicated in focal adhesion disassembly, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CAPN2 | Calpain2 protease cleaves focal adhesion components | Mediates Rab5-driven disassembly and migration |
| RAB5A | Small GTPase regulating endosomal trafficking | Drives calpain2-dependent focal adhesion disassembly |
| S100A11 | Calcium-binding protein promoting contractility | Promotes disassembly via myosin II and Piezo1 |
| PIEZO1 | Mechanosensitive calcium channel | Mediates Ca2+ entry for disassembly |
| FERMT2 | Kindlin-2, integrin activator | Promotes rear focal adhesion disassembly and directional persistence |
| CDK1 | Cyclin-dependent kinase 1 | Induces kindlin degradation at mitotic entry |
| CCNB1 | Cyclin B1, CDK1 partner | Drives mitotic focal adhesion disassembly |
| CLTC | Clathrin heavy chain | Required for integrin endocytosis during disassembly |
| ITGB1 | Integrin beta 1 | Endocytosed during disassembly |
| ITGB3 | Integrin beta 3 | Endocytosed during disassembly |
| MYH9 | Myosin II heavy chain | Generates contractile force for disassembly |
| TLN1 | Talin-1, focal adhesion structural protein | Cleaved by calpain2 during disassembly |
| VCL | Vinculin, focal adhesion protein | Component of focal adhesions that disassemble |
| PTK2 | Focal adhesion kinase (FAK) | Signaling hub in focal adhesions |
| ARRB1 | Beta-arrestin 1 | GPCR-dependent and -independent signaling in adhesion |
| ARRB2 | Beta-arrestin 2 | GPCR-dependent and -independent signaling in adhesion |
How Is focal adhesion disassembly Regulated?
Focal adhesion disassembly is regulated by multiple mechanisms. Mechanical force and actomyosin contractility are central, as computational models demonstrate that force-dependent kinetics control adhesion lifetime. Calcium signaling through S100A11 and Piezo1 promotes myosin II-driven contractility and disassembly. The cell cycle kinase CDK1-cyclin-B1 regulates disassembly at mitotic entry by inducing kindlin degradation. Kindlin-2 itself is a key regulator of rear focal adhesion disassembly and directional persistence. Additionally, Rab5 and calpain2 mediate a proteolytic-endocytic pathway, while clathrin-dependent endocytosis of integrins is required for disassembly. GPCR-dependent and -independent arrestin signaling may also modulate adhesion dynamics.
focal adhesion disassembly and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CAPN2 | Cancer invasion and metastasis | Knockout in cancer cell lines to assess migration |
| FERMT2 | Cancer progression, directional migration | Knockout or point mutation to study rear disassembly |
| CDK1 | Cell cycle regulation, mitotic defects | Knock-in of degradation-resistant kindlin |
| PIEZO1 | Mechanotransduction, cancer | Overexpression or knockout to study calcium signaling |
| CLTC | Endocytosis defects, migration | Knockout to block integrin endocytosis |
Cancer invasion and metastasis
Dysregulated focal adhesion disassembly is a hallmark of invasive cancer cells. Asymmetric disassembly at the rear of migrating cells is required for directional migration, and its perturbation can lead to enhanced or reduced invasion. Kindlin-2, which promotes rear focal adhesion disassembly, has been implicated in cancer progression. Targeting the molecular machinery of disassembly, such as calpain2 or Rab5, may offer therapeutic strategies to limit metastasis.
Developmental disorders
Proper focal adhesion turnover is essential for embryonic development and tissue morphogenesis. Defects in disassembly can lead to impaired cell migration during development, potentially causing structural birth defects. The involvement of cell cycle-regulated disassembly via CDK1-cyclin-B1 suggests that developmental defects may arise from errors in mitotic adhesion turnover.
Wound healing and immune response
Cell migration is critical for wound healing and immune cell trafficking. Efficient focal adhesion disassembly allows fibroblasts and immune cells to move to sites of injury or infection. Disruption of disassembly mechanisms, such as clathrin-mediated endocytosis of integrins, could impair these processes.
From focal adhesion disassembly-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CAPN2 impair focal adhesion disassembly? | CAPN2 knockout cell line |
| Does kindlin-2 degradation drive mitotic disassembly? | Kindlin-2 point mutant resistant to CDK1 phosphorylation |
| How does S100A11 promote contractility? | S100A11 knockout with rescue by wild-type or mutant |
| Is Piezo1-mediated calcium entry required for disassembly? | PIEZO1 knockout or knock-in of calcium-binding mutant |
| Does clathrin-mediated endocytosis regulate integrin turnover? | CLTC knockout or overexpression of dominant-negative clathrin |
| Can Rab5 activation enhance disassembly? | RAB5A overexpression or constitutively active mutant |
How to Study the focal adhesion disassembly Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell TIRF microscopy | Focal adhesion turnover dynamics | Visualize disassembly at cell rear |
| Proteomics | Protein composition changes | Identify calpain2 substrates |
| Computational modeling | Force-dependent kinetics | Predict disassembly rates |
| Calcium imaging | Intracellular Ca2+ levels | Assess Piezo1-mediated entry |
| Endocytosis assays | Integrin internalization | Measure clathrin-dependent uptake |
| Cell migration assays | Directional persistence and speed | Evaluate kindlin-2 role |
| Mitotic entry synchronization | Cell cycle-dependent disassembly | Study CDK1-cyclin-B1 effects |
| GPCR signaling assays | Arrestin recruitment | Probe GPCR-dependent adhesion regulation |
Live-cell imaging of focal adhesion dynamics
Fluorescently tagged focal adhesion proteins (e.g., paxillin, vinculin) can be imaged in live cells to track assembly and disassembly events. This method reveals the spatial and temporal dynamics of disassembly, including asymmetry at the rear of migrating cells.
Proteomics and interactomics
Mass spectrometry-based proteomics can identify changes in focal adhesion composition during disassembly. Proximity labeling or co-immunoprecipitation can reveal interactions between disassembly machinery such as calpain2, Rab5, and integrins.
Computational modeling
Force-dependent computational models simulate focal adhesion assembly and disassembly kinetics, providing quantitative predictions that can be tested experimentally.
Calcium imaging and mechanotransduction assays
Calcium indicators and Piezo1 channel assays measure calcium influx during disassembly. Combining with myosin II inhibitors can dissect the contractility-dependent pathway.
How CRISPR Can Be Used to Study GO:0120181 focal adhesion disassembly
Knockout
CRISPR knockout of genes such as CAPN2, RAB5A, or FERMT2 can abolish focal adhesion disassembly, leading to impaired migration. These models are used to test causality and identify compensatory pathways.
Point Mutation
Point mutations can be introduced to disrupt specific phosphorylation sites, such as those in kindlin-2 targeted by CDK1, to study cell cycle-regulated disassembly without completely removing the protein.
Knock-in
Knock-in of fluorescent tags (e.g., GFP-paxillin) allows real-time visualization of focal adhesion disassembly in live cells. Knock-in of degradation-resistant mutants can stabilize adhesions and reveal regulatory mechanisms.
Overexpression
Overexpression of wild-type or constitutively active proteins (e.g., RAB5A, S100A11) can enhance disassembly and promote migration. This approach is useful for gain-of-function studies.
How EDITGENE Supports focal adhesion disassembly Research
Researchers studying focal adhesion disassembly-related genes often need to determine whether a candidate gene is causally involved in the process or merely correlated with it. CRISPR-based models provide the gold standard for establishing causality, and EDITGENE offers a comprehensive suite of services to generate such models efficiently.
Contact EDITGENE today to design your custom CRISPR model for focal adhesion disassembly research.
Frequently Asked Questions About focal adhesion disassembly
What is focal adhesion disassembly?
Focal adhesion disassembly is the biological process (GO:0120181) by which a focal adhesion complex is broken down into its constituent components, allowing cells to detach from the extracellular matrix and migrate.
What genes are involved in focal adhesion disassembly?
Key genes include CAPN2, RAB5A, S100A11, PIEZO1, FERMT2, CDK1, CCNB1, CLTC, and integrins such as ITGB1 and ITGB3.
How is focal adhesion disassembly regulated?
It is regulated by mechanical force, actomyosin contractility, calcium signaling, cell cycle kinases, and endocytic trafficking.
Why is focal adhesion disassembly important for cell migration?
Disassembly allows cells to release rear adhesions and move forward, establishing polarity and directional persistence.
What role does calpain2 play in focal adhesion disassembly?
Calpain2 is a calcium-dependent protease that cleaves focal adhesion components, mediating Rab5-driven disassembly.
How does kindlin-2 contribute to focal adhesion disassembly?
Kindlin-2 promotes rear focal adhesion disassembly and directional persistence, and its degradation at mitotic entry drives disassembly.
What is the role of clathrin in focal adhesion disassembly?
Clathrin-dependent endocytosis of integrins is required for focal adhesion disassembly, removing integrins from the membrane.
How does S100A11 promote focal adhesion disassembly?
S100A11 promotes myosin II-driven contractility and Piezo1-mediated calcium entry, which together drive disassembly.
What diseases are linked to defective focal adhesion disassembly?
Cancer invasion and metastasis, developmental disorders, and impaired wound healing have been linked to defects in disassembly.
What methods are used to study focal adhesion disassembly?
Live-cell imaging, proteomics, computational modeling, calcium imaging, and CRISPR-based genetic screens are commonly used.
Conclusion
Focal adhesion disassembly (GO:0120181) is a tightly regulated biological process essential for cell migration, cell cycle progression, and tissue morphogenesis. Research over the past decades has identified key molecular players, including calpain2, Rab5, kindlin-2, S100A11, Piezo1, and clathrin, that orchestrate the breakdown of focal adhesions. Dysregulation of this process contributes to cancer metastasis and developmental defects, making it a promising target for therapeutic intervention. Continued investigation using advanced CRISPR models and imaging techniques will further elucidate the mechanisms and translational potential of focal adhesion disassembly.
References
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- 2. Honasoge KS et al.. 2023. Force-dependent focal adhesion assembly and disassembly: A computational study.. PLoS Comput Biol 19(10):e1011500 PMID: 37801464
- 3. Mendoza PA et al.. 2018. Calpain2 mediates Rab5-driven focal adhesion disassembly and cell migration.. Cell Adh Migr 12(3):185-194 PMID: 29099266
- 4. Mohammed TO et al.. 2024. S100A11 promotes focal adhesion disassembly via myosin II-driven contractility and Piezo1-mediated Ca2+ entry.. J Cell Sci 137(2) PMID: 38277157
- 5. Chen NP et al.. 2022. CDK1-cyclin-B1-induced kindlin degradation drives focal adhesion disassembly at mitotic entry.. Nat Cell Biol 24(5):723-736 PMID: 35469017
- 6. Liu J et al.. 2021. Kindlin-2 promotes rear focal adhesion disassembly and directional persistence during cell migration.. J Cell Sci 134(1) PMID: 33277381
- 7. Gurevich VV et al.. 2024. GPCR-dependent and -independent arrestin signaling.. Trends Pharmacol Sci 45(7):639-650 PMID: 38906769
- 8. Chao WT et al.. 2009. Focal adhesion disassembly requires clathrin-dependent endocytosis of integrins.. FEBS Lett 583(8):1337-43 PMID: 19306879
