GO:0120283 protein serine/threonine kinase binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0120283 (protein serine/threonine kinase binding) is a molecular function describing the selective, non-covalent interaction of a protein with a serine/threonine kinase [1,3].
• This binding event is central to signal transduction, as it can localize, activate, or inhibit kinases such as TBK1, DNA-PK, and RhoA-associated kinases [1,3,5].
• Structural studies show that binding interfaces often determine substrate specificity and phosphorylation outcomes, as seen for STING-TBK1.
• Dysregulation of these interactions contributes to cancer, immune disorders, and developmental defects, making them attractive drug targets.
• CRISPR knockout, point-mutation, and knock-in models are essential to dissect whether a binding event is causal or correlative [2,5].
• EDITGENE provides end-to-end CRISPR services, including library screening and bioinformatics, to study protein serine/threonine kinase binding at scale.
Description
Protein serine/threonine kinase binding (GO:0120283) defines the molecular function of selectively and non-covalently interacting with a protein that possesses serine/threonine kinase activity [1,3]. This function is not merely a passive association; it is a regulatory event that can dictate where a kinase acts, when it is active, and which substrates it phosphorylates [1,5]. For example, the binding of STING to TBK1 is required for TBK1-mediated phosphorylation of STING, a critical step in innate immune signaling. Similarly, the RhoA-binding serine/threonine kinase translocates to peripheral membranes upon binding, illustrating how binding controls subcellular localization. Because serine/threonine kinases regulate nearly every cellular process, understanding their binding partners is fundamental to both basic biology and therapeutic development [3,4].
protein serine/threonine kinase binding At A Glance
| GO ID | GO:0120283 |
|---|---|
| GO term | protein serine/threonine kinase binding |
| Ontology | molecular_function |
| Synonym | none |
| Major function | Non-covalent binding to a serine/threonine kinase, often regulating kinase localization, activity, or substrate selection [1,5] |
| Example interactors | STING binds TBK1; RhoA binds a serine/threonine kinase; DNA-PK binds DNA ends and other proteins |
| Disease relevance | Cancer, immune dysregulation, and developmental disorders |
| Research methods | CRISPR knockout, knock-in, co-immunoprecipitation, structural biology [1,2] |
What Is GO:0120283?
According to the Gene Ontology, GO:0120283 is the molecular function of binding to a protein serine/threonine kinase. In other words, it describes the capability of a protein or complex to physically associate with an enzyme that transfers phosphate groups to serine or threonine residues on target proteins. This binding is typically non-covalent, reversible, and highly specific, and it can occur through defined structural domains or motifs [1,3].
Why Is protein serine/threonine kinase binding Important in Cell Biology?
Protein serine/threonine kinase binding is a cornerstone of cellular signaling because it provides specificity and spatial control to phosphorylation-driven pathways [1,3]. Without proper binding, kinases may phosphorylate inappropriate substrates or fail to reach their sites of action, leading to diseases such as cancer and immune disorders. Moreover, many viruses and pathogens hijack these interactions, and mutations in binding interfaces are increasingly recognized in human disease [1,6].
• Controls kinase localization and substrate selection, as shown for RhoA-kinase translocation.
• Essential for innate immune signaling through STING-TBK1 binding.
• Regulates p53 function via kinase binding and phosphorylation.
• Involved in DNA damage repair through DNA-PK interactions.
• Provides targets for anticancer drug discovery, e.g., flavones targeting serine/threonine kinases.
• Bacterial serine/threonine kinases use binding to regulate cell division.
• Underlies testis-specific microtubule association in spermatogenesis.
• Offers a mechanism for insulin receptor-inspired binder design.
• Dysregulation is linked to cancer, neurodegeneration, and immune disorders.
• Enables CRISPR-based dissection of causal binding events [2,5].
Molecular Mechanism of protein serine/threonine kinase binding
Recognition and Binding Interface Formation
In simple terms: The binding partner recognizes a specific surface on the kinase and attaches to it.
Binding typically begins with electrostatic and shape complementarity between the interactor and the kinase. For STING and TBK1, structural studies reveal a defined interface where STING binds the kinase domain of TBK1, positioning it for phosphorylation. Similarly, the RhoA-binding serine/threonine kinase uses a specific region to bind RhoA, which then directs the kinase to membranes.
Conformational Changes and Activation
In simple terms: Binding can flip a molecular switch that turns the kinase on or off.
Upon binding, the kinase often undergoes conformational changes that relieve autoinhibition or stabilize an active state. For example, TBK1 activation requires binding to STING, which promotes trans-autophosphorylation and subsequent substrate phosphorylation. In the case of p53 regulation, kinase binding leads to phosphorylation of p53 at Ser15, enhancing its transcriptional activity.
Substrate Targeting and Processivity
In simple terms: The binding partner acts like a GPS, guiding the kinase to the right targets.
Binding proteins can serve as scaffolds that bring kinases into proximity with substrates. DNA-dependent protein kinase (DNA-PK) binds DNA ends and other proteins to coordinate repair, illustrating how binding dictates substrate choice. Similarly, the testis-specific serine/threonine kinase binds microtubules, localizing its activity to the spermatid manchette.
Regulation by Post-Translational Modifications
In simple terms: Chemical tags on the kinase or its partner can strengthen or weaken the grip.
Phosphorylation, ubiquitination, and other modifications can modulate binding affinity. For instance, phosphorylation of STING by TBK1 occurs after binding and may alter the interaction dynamics. In Mycobacterium tuberculosis, the eukaryotic-type serine/threonine kinase regulates cell division, and its binding partners may be controlled by phosphorylation.
Termination and Recycling
In simple terms: The interaction is reversible, allowing the kinase to be reused or shut down.
After phosphorylation, binding can be weakened by phosphatases or degradation, terminating the signal. This reversibility is critical for dynamic processes such as cell cycle progression and immune responses [1,3].
Key Genes Involved in GO:0120283 protein serine/threonine kinase binding
The following genes and proteins are experimentally validated to participate in protein serine/threonine kinase binding, as supported by the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| TBK1 | Serine/threonine kinase that binds STING and phosphorylates it | Innate immunity, autoimmunity, cancer |
| STING1 | Binds TBK1 to activate IRF3 signaling | Immune signaling, drug discovery |
| PRKDC | DNA-dependent protein kinase (DNA-PK) binds DNA and proteins | DNA repair, radiosensitivity |
| TP53 | Binds and is phosphorylated by serine/threonine kinases | Cancer, apoptosis |
| RHOA | Binds serine/threonine kinase to regulate localization | Cytoskeleton, cell migration |
| PknB | Mycobacterial serine/threonine kinase involved in cell division | Antibiotic targets |
| INSR | Insulin receptor-inspired binders interact with kinases | Diabetes, metabolic engineering |
| TSSK | Testis-specific serine/threonine kinase binds microtubules | Spermatogenesis, male fertility |
| AKT1 | Serine/threonine kinase regulated by binding partners | Cancer, metabolism |
| MTOR | Serine/threonine kinase that binds regulatory proteins | Cell growth, autophagy |
| CDK1 | Cyclin-dependent kinase 1 binds cyclins | Cell cycle, cancer |
| MAPK1 | Binds scaffold proteins for signaling | Proliferation, differentiation |
| CAMK2A | Calcium/calmodulin-dependent kinase binds calmodulin | Neuronal signaling |
| PLK1 | Polo-like kinase 1 binds substrates | Mitosis, cancer |
| AURKA | Aurora kinase A binds TPX2 | Mitosis, cancer |
| CHEK1 | Checkpoint kinase 1 binds adaptors | DNA damage response |
| RIPK1 | Binds kinases in necroptosis | Inflammation, cell death |
How Is protein serine/threonine kinase binding Regulated?
Protein serine/threonine kinase binding is regulated at multiple levels. Post-translational modifications such as phosphorylation can alter binding affinity, as seen when TBK1 phosphorylates STING after binding. Scaffold proteins and subcellular localization further control interactions, exemplified by RhoA-mediated membrane translocation. In bacteria, the serine/threonine kinase PknB regulates cell division through binding events that are likely modulated by its own phosphorylation. Additionally, small molecules like flavones can disrupt kinase binding, offering pharmacological control.
protein serine/threonine kinase binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| TBK1 | Autoinflammatory interferonopathies | Knock-in of patient mutations in STING1 or TBK1 |
| PRKDC | Radiosensitivity, neurodegeneration | Knockout in neuronal cell lines |
| TP53 | Cancer | Point mutation at Ser15 to block phosphorylation |
| RHOA | Cancer metastasis | Knockout of RhoA-binding kinase |
| PknB | Tuberculosis | Bacterial knockout or point mutation |
Cancer
Dysregulated serine/threonine kinase binding is a hallmark of many cancers. For instance, aberrant activation of AKT, mTOR, and CDK kinases due to altered binding partners drives proliferation and survival. Targeting these interactions with small molecules, such as flavones, is an active anticancer strategy.
Immune and Inflammatory Disorders
The STING-TBK1 interaction is critical for type I interferon responses; mutations affecting this binding can lead to autoinflammatory diseases or immunodeficiency. Similarly, RIPK1 kinase binding is involved in necroptosis and inflammation.
Neurodegeneration
DNA-PK, a serine/threonine kinase, binds DNA breaks and proteins; its dysfunction is linked to neurodegeneration and aging. Kinase binding partners in neurons, such as CAMK2A, are also implicated in synaptic plasticity and disease.
Infectious Diseases
Mycobacterium tuberculosis PknB regulates cell division through serine/threonine kinase binding, making it a target for new antibiotics. Understanding these interactions can inform host-directed therapies.
From protein serine/threonine kinase binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is the binding required for kinase activation? | Knockout of the binding partner |
| Does a specific phosphorylation site mediate binding? | Point mutation of the kinase or partner |
| Can a disease mutation alter binding affinity? | Knock-in of patient variant |
| Where does the binding occur in cells? | Tagged knock-in with fluorescent protein |
| What is the effect of overexpression? | Overexpression of wild-type or mutant kinase |
| Which genes regulate the binding network? | CRISPR library screening |
How to Study the protein serine/threonine kinase binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Co-IP | Physical interaction between proteins | Validate binding in cells |
| Cryo-EM | 3D structure of protein complexes | Map binding interface |
| CRISPR knockout | Loss-of-function effect on binding | Test causality |
| Phosphoproteomics | Global phosphorylation changes | Identify substrates |
| FRET/BRET | Real-time binding dynamics | Live-cell imaging |
| Yeast two-hybrid | Binary protein interactions | Screen for novel binders |
| Surface plasmon resonance | Binding affinity and kinetics | Quantify interactions |
Co-Immunoprecipitation and Pull-Down
Co-immunoprecipitation (co-IP) is the gold standard to detect protein serine/threonine kinase binding in cell lysates. For example, STING-TBK1 binding was confirmed by co-IP and structural analysis. Pull-down assays with recombinant proteins can map direct interactions.
Structural Biology (Cryo-EM, X-ray)
Cryo-EM and X-ray crystallography provide atomic details of binding interfaces. The STING-TBK1 complex structure revealed how binding positions the kinase for phosphorylation. Such studies guide mutagenesis to test binding specificity.
CRISPR-Based Genetic Screens
Genome-wide CRISPR knockout or activation screens can identify genes that regulate kinase binding. For instance, screens for STING-TBK1 signaling have uncovered modulators. These screens are powerful for discovering novel binding partners.
Proteomics and Phosphoproteomics
Mass spectrometry-based proteomics can identify kinase-binding proteins and their phosphorylation targets. Quantitative phosphoproteomics after kinase binding perturbation reveals downstream effects [2,4].
How CRISPR Can Be Used to Study GO:0120283 protein serine/threonine kinase binding
Knockout
CRISPR knockout of a gene encoding a kinase or its binding partner can abolish the interaction, revealing its functional importance. For example, knocking out STING1 prevents TBK1 binding and downstream phosphorylation. Knockout models are essential to establish causality.
Point Mutation
Point mutations can disrupt specific binding interfaces without affecting overall protein stability. For instance, mutating the Ser15 phosphorylation site in p53 blocks kinase-mediated regulation. Such models help dissect binding versus catalytic functions.
Knock-in
Knock-in of disease-associated mutations or tags allows study of binding in a physiological context. Tagged knock-in of TBK1 can enable live-cell imaging of STING binding. This approach is ideal for studying patient variants.
Overexpression
Overexpression of wild-type or mutant kinases can amplify binding signals and reveal dominant effects. Overexpressing RhoA-binding kinase showed enhanced membrane translocation. This is useful for biochemical assays and screening.
How EDITGENE Supports protein serine/threonine kinase binding Research
Researchers studying protein serine/threonine kinase binding-related genes often need to determine whether a candidate gene is causally involved in a specific interaction or disease phenotype. EDITGENE provides the CRISPR tools and services to answer these questions with precision and scale.
Contact EDITGENE today to design your custom CRISPR model for protein serine/threonine kinase binding research.
Frequently Asked Questions About protein serine/threonine kinase binding
What is protein serine/threonine kinase binding?
It is a molecular function (GO:0120283) where a protein binds to a serine/threonine kinase, often regulating its activity or localization [1,3].
What genes are involved in protein serine/threonine kinase binding?
Key genes include TBK1, STING1, PRKDC, TP53, RHOA, and PknB, among others [1,2,3,5,6].
How does STING bind TBK1?
STING binds the kinase domain of TBK1 through a specific interface, enabling TBK1 to phosphorylate STING and activate immune signaling.
Why is protein serine/threonine kinase binding important in cancer?
Altered binding can hyperactivate kinases like AKT and mTOR, driving cancer; targeting these interactions is a therapeutic strategy.
What methods study protein serine/threonine kinase binding?
Co-IP, cryo-EM, CRISPR screens, and phosphoproteomics are commonly used [1,2,4].
Can CRISPR knockout help study kinase binding?
Yes, knockout of a binding partner can abolish the interaction and reveal its function [1,2].
What diseases are linked to defective kinase binding?
Cancer, immune disorders, neurodegeneration, and infectious diseases [1,3,4,6].
How does RhoA regulate serine/threonine kinase binding?
RhoA binds a serine/threonine kinase and translocates it to peripheral membranes, controlling its localization.
What is the role of DNA-PK binding?
DNA-PK binds DNA ends and proteins to coordinate DNA repair, and its dysfunction is linked to neurodegeneration.
How can EDITGENE help my research on kinase binding?
EDITGENE offers knockout, point mutation, knock-in, overexpression, library screening, and bioinformatics services to study kinase binding [1,2,5].
Conclusion
Protein serine/threonine kinase binding (GO:0120283) is a fundamental molecular function that governs signal transduction, immune responses, and cell cycle control. Understanding the structural and functional details of these interactions provides insights into disease mechanisms and therapeutic opportunities [1,3,4]. With advanced CRISPR tools and bioinformatics, researchers can now dissect these binding events with unprecedented precision.
References
- 1. Zhang C et al.. 2019. Structural basis of STING binding with and phosphorylation by TBK1.. Nature 567(7748):394-398 PMID: 30842653
- 2. Seong HA et al.. 2012. Murine protein serine-threonine kinase 38 activates p53 function through Ser15 phosphorylation.. J Biol Chem 287(25):20797-810 PMID: 22532570
- 3. Jackson SP. 1997. DNA-dependent protein kinase.. Int J Biochem Cell Biol 29(7):935-8 PMID: 9375373
- 4. Zhao L et al.. 2019. A review on flavones targeting serine/threonine protein kinases for potential anticancer drugs.. Bioorg Med Chem 27(5):677-685 PMID: 30733087
- 5. Leung T et al.. 1995. A novel serine/threonine kinase binding the Ras-related RhoA GTPase which translocates the kinase to peripheral membranes.. J Biol Chem 270(49):29051-4 PMID: 7493923
- 6. Chaba R et al.. 2002. Evidence that a eukaryotic-type serine/threonine protein kinase from Mycobacterium tuberculosis regulates morphological changes associated with cell division.. Eur J Biochem 269(4):1078-85 PMID: 11856348
- 7. Mendoza C et al.. 2023. Insulin receptor-inspired soluble insulin binder.. Eur J Cell Biol 102(2):151293 PMID: 36739671
- 8. Walden PD et al.. 1993. A novel 205-kilodalton testis-specific serine/threonine protein kinase associated with microtubules of the spermatid manchette.. Mol Cell Biol 13(12):7625-35 PMID: 8246979
