GO:1990722 DAPK1-calmodulin complex: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1990722 describes the DAPK1-calmodulin complex, a serine/threonine protein kinase complex involved in cell survival, apoptosis and autophagic cell death pathways.
• DAPK1 is activated by dephosphorylation of an N-terminal serine and by calcium-calmodulin binding.
• The complex integrates calcium signals with phosphorylation cascades to control cell fate decisions.
• Dysregulation of DAPK1-calmodulin signaling is implicated in cancer, neurodegeneration and autophagy-related disorders.
• CRISPR knockout, point mutation, knock-in and overexpression models enable precise dissection of DAPK1-calmodulin complex function.
• Understanding this complex supports drug discovery targeting cell death pathways and calcium-dependent kinases.
Description
The DAPK1-calmodulin complex (GO:1990722) is a cellular component defined as a serine/threonine protein kinase complex involved in cell survival, apoptosis and autophagic cell death pathways. DAPK1 is activated by the dephosphorylation of an N-terminal serine and calcium-calmodulin binding. This complex is a key node where calcium signaling intersects with phosphorylation-based cell fate control. Researchers study GO:1990722 to understand how cells decide between survival and death under stress, and to identify therapeutic targets in cancer and neurodegeneration. The complex is conserved and functionally significant across cell types, making it a focus for both basic and translational research.
DAPK1-calmodulin complex At A Glance
| GO ID | GO:1990722 |
|---|---|
| GO term | DAPK1-calmodulin complex |
| Ontology | cellular_component |
| Synonym | death-associated protein kinase 1 - calmodulin complex |
| Major function | Serine/threonine protein kinase complex involved in cell survival, apoptosis and autophagic cell death pathways |
| Activation mechanism | Dephosphorylation of an N-terminal serine and calcium-calmodulin binding |
| Complex type | Protein kinase complex |
| Pathways | Cell survival, apoptosis, autophagic cell death |
What Is GO:1990722?
GO:1990722, the DAPK1-calmodulin complex, is a serine/threonine protein kinase complex that participates in cell survival, apoptosis and autophagic cell death pathways. Its activation requires dephosphorylation of an N-terminal serine on DAPK1 and binding of calcium-calmodulin. The term is a cellular component annotation describing the physical assembly of DAPK1 with calmodulin, which together form a functional kinase module.
Why Is DAPK1-calmodulin complex Important in Cell Biology?
The DAPK1-calmodulin complex is important because it integrates calcium signals with phosphorylation events to control cell survival, apoptosis and autophagic cell death. Its dysfunction is linked to cancer, neurodegeneration and autophagy-related diseases, making it a target for therapeutic intervention. Understanding its assembly and regulation provides mechanistic insights into cell fate decisions and offers opportunities for CRISPR-based disease modeling.
• Regulates cell survival and apoptosis through calcium-dependent kinase activity.
• Controls autophagic cell death pathways.
• Implicated in cancer progression and tumor suppression.
• Associated with neurodegenerative disorders.
• Serves as a node for calcium signaling integration.
• Target for small-molecule modulators of cell death.
• Enables CRISPR knockout studies to dissect pathway causality.
• Supports drug discovery efforts targeting DAPK1-calmodulin interactions.
What Happens During DAPK1-calmodulin complex?
Calcium-dependent activation
In simple terms: Calcium binds calmodulin, which then activates DAPK1.
The DAPK1-calmodulin complex is activated when calcium binds calmodulin, promoting its interaction with DAPK1. This binding is essential for the kinase activity of DAPK1 and its downstream signaling.
Dephosphorylation of N-terminal serine
In simple terms: Removing a phosphate from DAPK1 turns it on.
DAPK1 is activated by the dephosphorylation of an N-terminal serine residue, which relieves autoinhibition and allows the kinase to adopt an active conformation.
Substrate phosphorylation
In simple terms: Active DAPK1 adds phosphate groups to target proteins.
Once active, the DAPK1-calmodulin complex phosphorylates serine/threonine residues on downstream substrates, propagating signals that control cell survival, apoptosis and autophagic cell death.
Cell fate decision
In simple terms: The complex helps decide whether a cell lives or dies.
Depending on cellular context, DAPK1-calmodulin complex activity can promote survival, apoptosis or autophagic cell death, thereby acting as a critical decision node.
Key Genes Involved in GO:1990722 DAPK1-calmodulin complex
The following genes and proteins are central to the DAPK1-calmodulin complex and its signaling network.
| Gene | Major Role | Research Relevance |
|---|---|---|
| DAPK1 | Serine/threonine kinase; core component of the complex | Knockout and point mutation studies to dissect kinase function |
| CALM1 | Calmodulin; calcium sensor that binds DAPK1 | Knock-in and overexpression to study calcium-dependent activation |
| CALM2 | Calmodulin isoform; binds DAPK1 | CRISPR models to test isoform-specific roles |
| CALM3 | Calmodulin isoform; binds DAPK1 | Knockout to assess redundancy |
| CASP3 | Executioner caspase in apoptosis | Readout of DAPK1-mediated apoptosis |
| BECN1 | Autophagy regulator | Link to autophagic cell death pathways |
| MAP1LC3B | Autophagosome marker | Monitoring autophagy induction |
| TP53 | Tumor suppressor; interacts with DAPK1 pathways | Cancer models to study crosstalk |
| AKT1 | Survival kinase; opposes DAPK1 | Point mutation to study signaling balance |
| PTEN | Tumor suppressor; modulates AKT and DAPK1 | Knockout models for cancer research |
| CAMK2A | Calcium/calmodulin-dependent kinase | Comparative studies of calcium signaling |
| PPP2CA | Phosphatase; may dephosphorylate DAPK1 | Knockout to test activation mechanism |
| PPP1CA | Phosphatase; candidate regulator | Overexpression to assess dephosphorylation |
| ATG5 | Autophagy machinery | CRISPR knockout to block autophagic cell death |
| ATG7 | Autophagy machinery | Knockout to dissect autophagy dependence |
| DRP1 | Mitochondrial fission; linked to cell death | Knock-in reporters for imaging |
| BAX | Apoptosis effector | Overexpression to enhance death signaling |
How Is DAPK1-calmodulin complex Regulated?
The DAPK1-calmodulin complex is regulated by calcium availability, calmodulin binding, and the phosphorylation status of an N-terminal serine on DAPK1. Dephosphorylation of this serine activates the kinase, while phosphorylation maintains an inactive state. Calcium influx triggers calmodulin binding, which is required for full activation. Additional layers of regulation may involve phosphatases and kinases that modulate DAPK1 activity, though specific regulators are still being defined.
DAPK1-calmodulin complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DAPK1 | Cancer, neurodegeneration | CRISPR knockout in cancer cell lines and neurons |
| CALM1 | Calcium signaling disorders | Point mutation knock-in to alter calcium binding |
| CASP3 | Apoptosis dysregulation | Overexpression and knockout models |
| BECN1 | Autophagy-related diseases | Knockout to block autophagic cell death |
| TP53 | Cancer | Knock-in of patient mutations |
Cancer
DAPK1-calmodulin complex signaling is frequently dysregulated in cancer, where loss of DAPK1 function can promote tumor survival and resistance to apoptosis. The complex's role in autophagic cell death also influences tumor progression and response to therapy.
Neurodegeneration
Aberrant activation of the DAPK1-calmodulin complex has been implicated in neurodegenerative conditions, where excessive cell death contributes to neuronal loss. Calcium dysregulation in neurons may trigger complex activation and downstream apoptotic pathways.
Autophagy-related disorders
Because the complex controls autophagic cell death, its dysfunction may contribute to disorders characterized by impaired autophagy, including certain metabolic and inflammatory diseases.
From DAPK1-calmodulin complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does DAPK1 kinase activity require calmodulin binding? | Point mutation in DAPK1 calmodulin-binding domain |
| What is the role of N-terminal serine dephosphorylation? | Phospho-mutant knock-in (S to A or S to D) |
| Is DAPK1 essential for autophagic cell death? | DAPK1 knockout cells treated with autophagy inducers |
| How does DAPK1-calmodulin complex affect apoptosis? | Overexpression of DAPK1 with apoptosis readouts |
| Can we visualize complex formation in live cells? | Tagged knock-in of DAPK1 and calmodulin with fluorescent proteins |
| What are downstream targets of the complex? | Knockout followed by phosphoproteomics |
How to Study the DAPK1-calmodulin complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Loss of gene function | Determine necessity of DAPK1 or calmodulin |
| Phosphoproteomics | Phosphorylation events | Identify downstream substrates |
| Live-cell imaging | Complex localization and dynamics | Visualize calcium-dependent assembly |
| Apoptosis assays | Caspase activity, cell death | Measure pro-apoptotic signaling |
| Autophagy assays | LC3B lipidation, autophagosome formation | Assess autophagic cell death |
| Calcium imaging | Intracellular calcium levels | Correlate calcium signals with complex activation |
| Co-immunoprecipitation | Protein-protein interactions | Confirm DAPK1-calmodulin binding |
CRISPR knockout
CRISPR knockout of DAPK1 or calmodulin genes enables loss-of-function studies to determine the complex's role in cell survival, apoptosis and autophagy.
Phosphoproteomics
Phosphoproteomics can identify substrates of the DAPK1-calmodulin complex and map signaling networks downstream of its activation.
Live-cell imaging
Fluorescently tagged DAPK1 and calmodulin allow real-time visualization of complex assembly and localization in response to calcium signals.
Autophagy and apoptosis assays
LC3B lipidation, caspase activation and cell viability assays measure the functional consequences of DAPK1-calmodulin complex activity.
How CRISPR Can Be Used to Study GO:1990722 DAPK1-calmodulin complex
Knockout
CRISPR knockout of DAPK1 or calmodulin genes creates loss-of-function models to test the requirement of the DAPK1-calmodulin complex in cell survival, apoptosis and autophagic cell death.
Point Mutation
Point mutations can be introduced into DAPK1 to prevent N-terminal serine dephosphorylation or calmodulin binding, allowing precise dissection of activation mechanisms.
Knock-in
Knock-in of fluorescent or epitope tags into DAPK1 and calmodulin enables visualization and biochemical isolation of the complex in native contexts.
Overexpression
Overexpression of DAPK1 and calmodulin can amplify complex formation and downstream signaling, useful for gain-of-function studies and drug screening.
How EDITGENE Supports DAPK1-calmodulin complex Research
Researchers studying DAPK1-calmodulin complex-related genes often need to determine whether a candidate gene is causally involved in cell survival, apoptosis or autophagic cell death. EDITGENE provides CRISPR-based cell model services to accelerate this discovery.
Contact EDITGENE today to design your custom CRISPR model for DAPK1-calmodulin complex research.
Frequently Asked Questions About DAPK1-calmodulin complex
What is the DAPK1-calmodulin complex?
It is a serine/threonine protein kinase complex (GO:1990722) involved in cell survival, apoptosis and autophagic cell death, activated by N-terminal serine dephosphorylation and calcium-calmodulin binding.
What genes are involved in the DAPK1-calmodulin complex?
Key genes include DAPK1 and calmodulin genes CALM1, CALM2 and CALM3, along with downstream effectors like CASP3 and BECN1.
How is DAPK1 activated?
DAPK1 is activated by dephosphorylation of an N-terminal serine and by calcium-calmodulin binding.
What diseases are linked to DAPK1-calmodulin complex dysfunction?
Cancer, neurodegeneration and autophagy-related disorders have been associated with dysregulation of this complex.
What is the GO ID for DAPK1-calmodulin complex?
The GO ID is GO:1990722.
What research methods are used to study the DAPK1-calmodulin complex?
CRISPR knockout, point mutation, knock-in, overexpression, phosphoproteomics, live-cell imaging and autophagy/apoptosis assays are commonly used.
Can CRISPR be used to model DAPK1-calmodulin complex function?
Yes, CRISPR knockout, point mutation, knock-in and overexpression models enable precise functional dissection.
What is the role of calmodulin in the DAPK1-calmodulin complex?
Calmodulin binds calcium and interacts with DAPK1 to activate its kinase function.
How does the DAPK1-calmodulin complex regulate autophagy?
It promotes autophagic cell death through phosphorylation of downstream substrates, though specific targets are still being defined.
Why is the DAPK1-calmodulin complex important for cancer research?
It controls apoptosis and autophagy, and its dysregulation can promote tumor survival and therapy resistance.
Conclusion
The DAPK1-calmodulin complex (GO:1990722) is a critical signaling module that integrates calcium and phosphorylation signals to control cell survival, apoptosis and autophagic cell death. Its dysfunction is linked to cancer, neurodegeneration and autophagy-related diseases, making it a valuable target for basic and translational research. CRISPR-based models and advanced omics approaches will continue to unravel its mechanisms and therapeutic potential.
References
- 1. Bürmann F et al.. 2025. Mechanism of DNA capture by the MukBEF SMC complex and its inhibition by a viral DNA mimic.. Cell 188(9):2465-2479.e14 PMID: 40168993
