GO:0008140 cAMP response element binding protein binding: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0008140 describes the molecular function of binding to a cAMP response element binding protein (CREB), a transcription factor that regulates gene expression in response to cAMP signaling.
• CREB binding is central to diverse biological processes including neuronal plasticity, cardiovascular remodeling, cancer progression, and metabolic regulation [1,6].
• Phosphorylation of CREB at Ser133 is a key regulatory event that modulates its interactions with coactivators and other binding partners.
• Dysregulation of CREB binding and activity is implicated in neurodegenerative disorders, diabetic nephropathy, and multiple cancers [1,3,5].
• Experimental models such as knockout, point-mutation, and knock-in cell lines are essential to dissect the causal roles of CREB-binding proteins [2,8].
• CRISPR-based screening and bioinformatics can identify novel regulators and downstream targets of CREB binding in disease contexts [1,5].
Description
The Gene Ontology (GO) term GO:0008140, cAMP response element binding protein binding, defines the molecular function of selectively interacting with a cAMP response element binding protein (CREB). CREB is a stimulus-induced transcription factor that binds to cAMP response elements (CREs) in DNA and activates transcription in response to various signaling pathways. Proteins that bind CREB do so to modulate its activity, stability, or recruitment to target promoters, thereby influencing gene expression programs. This binding function is critical for integrating extracellular signals into long-term cellular responses, such as synaptic plasticity, cell survival, and proliferation [1,4]. Researchers study GO:0008140 to understand how CREB and its binding partners coordinate transcriptional outputs in health and disease. For example, in cancer, CREB binding proteins can act as oncogenic coactivators or tumor suppressors depending on context. In neurodegenerative disorders, altered CREB binding contributes to neuronal dysfunction and death [3,4]. In metabolic diseases like diabetic nephropathy, CREB-mediated transcription in podocytes drives injury through lncRNA regulation. Thus, characterizing the interactome of CREB is essential for identifying therapeutic targets and biomarkers. This article provides a comprehensive overview of the biological processes, cellular components, and molecular mechanisms associated with GO:0008140. It highlights key genes and proteins, regulatory pathways, disease implications, and state-of-the-art research methods, including CRISPR-based models and bioinformatics. By synthesizing evidence from authoritative literature, we aim to support researchers in designing experiments that interrogate CREB binding function in relevant physiological and pathological contexts.
cAMP response element binding protein binding At A Glance
| GO ID | GO:0008140 |
|---|---|
| GO term | cAMP response element binding protein binding |
| Ontology | molecular_function |
| Synonym | CREB binding; CBP; cyclic AMP response element binding protein binding |
| Major function | Binding to CREB, a transcription factor that mediates cAMP-responsive gene expression |
| Definition source | QuickGO |
| Related processes | Transcription regulation, signal transduction, neuronal plasticity, cell proliferation |
| Disease relevance | Cancer, neurodegeneration, diabetic nephropathy, cardiovascular remodeling |
What Is GO:0008140?
GO:0008140 is defined as the molecular function of binding to a cAMP response element binding protein (CREB). This term encompasses any stable, non-covalent interaction with CREB, including interactions that regulate CREB's transcriptional activity, localization, or stability. It does not include binding to DNA or other transcription factors unless CREB is the direct binding partner.
Why Is cAMP response element binding protein binding Important in Cell Biology?
GO:0008140 is important because CREB is a master regulator of gene expression in response to cAMP and calcium signaling, and its binding partners determine the specificity, duration, and magnitude of transcriptional responses. Dysregulation of CREB binding is linked to a wide range of human diseases, including cancer, neurodegenerative disorders, and metabolic syndromes [1,3,5]. Understanding this molecular function at the mechanistic level can reveal new therapeutic targets and biomarkers, and guide the development of CRISPR-based models for functional validation.
• CREB binding proteins modulate transcription of genes involved in memory formation and neuronal survival.
• In cancer, CREB and its coactivators can drive oncogenic gene expression programs, making them potential drug targets.
• Altered CREB binding in neurodegenerative diseases contributes to neuronal death and cognitive decline.
• In diabetic nephropathy, CREB binding to lncRNA promoters mediates podocyte injury.
• CREB binding is essential for cardiovascular remodeling and may have both protective and pathological roles.
• The interaction of CREB with coactivators like CBP/p300 is a paradigm for signal-dependent transcription.
• CREB binding is conserved across evolution, as shown by its role in hydra regeneration.
• Studying CREB binding can uncover new mechanisms of gene regulation in stem cells and differentiation.
• CRISPR screens targeting CREB-binding proteins can identify novel therapeutic targets.
• Bioinformatics analysis of CREB binding sites can predict downstream pathways and disease associations.
Molecular Mechanism of cAMP response element binding protein binding
Recognition and Interaction with CREB
In simple terms: Proteins that bind CREB recognize specific regions on CREB, often the kinase-inducible domain (KID) or the bZIP domain.
Binding to CREB typically involves electrostatic and hydrophobic interactions with defined domains. Many coactivators, such as CBP/p300, bind to the phosphorylated Ser133 of CREB via their KIX domain. This phosphorylation-dependent interaction is a key regulatory switch. Other proteins may bind the bZIP domain to modulate DNA binding or dimerization. The specificity of these interactions ensures that CREB responds to distinct signaling inputs.
Phosphorylation-Dependent Regulation
In simple terms: Phosphorylation of CREB at Ser133 acts like a molecular switch that turns binding on or off.
CREB phosphorylation at Ser133 by kinases such as PKA, CaMKII, and MAPK is required for recruitment of coactivators like CBP/p300. Dephosphorylation by phosphatases such as PP1 and PP2A terminates the interaction. This dynamic phosphorylation cycle allows cells to rapidly respond to changes in cAMP and calcium levels. Mutations that mimic or prevent phosphorylation are commonly used to study CREB binding in vitro and in vivo.
Coactivator Recruitment and Transcriptional Activation
In simple terms: Once a protein binds CREB, it can recruit other factors that turn on gene expression.
The CREB-CBP/p300 complex acetylates histones and recruits RNA polymerase II to target promoters. Other CREB-binding proteins, such as CRTC (CREB-regulated transcription coactivators), are regulated by phosphorylation and nuclear translocation. These coactivators enhance transcription of CREB target genes involved in cell survival, proliferation, and metabolism. The composition of the CREB-bound complex determines the gene expression program.
Negative Feedback and Termination
In simple terms: Cells have ways to stop CREB binding to prevent excessive gene activation.
Inducible cAMP early repressor (ICER) is a CREB family member that lacks transactivation domains and can bind CREB or DNA to inhibit transcription. Phosphatases dephosphorylate CREB, reducing coactivator affinity. Ubiquitination and proteasomal degradation of CREB or its partners also terminate signaling. These negative feedback mechanisms are crucial for maintaining cellular homeostasis and preventing pathological overactivation.
Cellular Context and Compartmentalization
In simple terms: CREB binding happens in the nucleus and is influenced by where CREB is located in the cell.
CREB is predominantly nuclear, but it can shuttle between the cytoplasm and nucleus in response to signals. Binding partners may sequester CREB in specific compartments or facilitate its nuclear import. For example, in neurons, CREB binding to nuclear proteins is essential for activity-dependent transcription. The cellular context thus determines which proteins can access and bind CREB.
Key Genes Involved in GO:0008140 cAMP response element binding protein binding
The following genes encode proteins that bind CREB or are directly involved in CREB-mediated transcriptional regulation, as supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CREB1 | Encodes CREB, the central transcription factor that binds CREs | Target for knockout and point mutation to study CREB function [1,4] |
| CREBBP | Encodes CBP, a coactivator that binds phosphorylated CREB | Knockout models show embryonic lethality; important in cancer and neurodegeneration |
| EP300 | Encodes p300, a coactivator with histone acetyltransferase activity that binds CREB | Overexpression and knockdown studies reveal roles in transcription and disease |
| CRTC1 | Encodes CRTC1, a coactivator that binds CREB independently of Ser133 phosphorylation | Knockout mice show metabolic and neuronal phenotypes |
| CRTC2 | Encodes CRTC2, a coactivator that regulates gluconeogenic genes via CREB | Point mutations used to study CREB binding in metabolic diseases |
| ATF1 | Encodes ATF1, a CREB family member that can heterodimerize with CREB | Knock-in models help dissect CREB-ATF1 interactions |
| CREM | Encodes CREM, which can act as a repressor or activator by binding CREB | Alternative splicing and knockout models reveal regulatory roles |
| PP1 | Protein phosphatase 1 dephosphorylates CREB at Ser133 | Overexpression and knockout studies show effects on CREB binding |
| PP2A | Protein phosphatase 2A dephosphorylates CREB | Inhibitors and knockdown used to study CREB regulation |
| PKA | Protein kinase A phosphorylates CREB at Ser133 | Knockout and point mutation models define PKA-CREB signaling |
| CAMK2 | CaMKII phosphorylates CREB in response to calcium signals | Knockout mice show learning deficits |
| MAPK1 | ERK2 phosphorylates CREB and regulates its binding | Point mutations used to study MAPK-CREB crosstalk |
| KID | Kinase-inducible domain of CREB that binds coactivators | Peptide models and mutations used to study binding specificity |
| bZIP | Basic leucine zipper domain of CREB for dimerization and DNA binding | Deletion mutants used to study CREB binding and function |
| ICER | Inducible cAMP early repressor, a CREB antagonist | Overexpression models show repression of CREB target genes |
| DLX6-AS1 | lncRNA regulated by CREB binding in podocytes | Knockdown models show reduced podocyte injury |
How Is cAMP response element binding protein binding Regulated?
CREB binding is regulated by multiple mechanisms. Phosphorylation of CREB at Ser133 by kinases such as PKA, CaMKII, and MAPK creates a docking site for coactivators like CBP/p300 [4,7]. Dephosphorylation by PP1 and PP2A disrupts these interactions. Additionally, the expression and subcellular localization of CREB-binding proteins are controlled by transcriptional and post-translational mechanisms. For example, CRTC coactivators are regulated by phosphorylation-dependent nuclear translocation. In disease states, aberrant kinase or phosphatase activity can alter CREB binding and contribute to pathology [1,3].
cAMP response element binding protein binding and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CREB1 | Cancer, neurodegeneration | Knockout and point-mutation cell lines, xenografts [1,4] |
| CREBBP | Rubinstein-Taybi syndrome, cancer | Knock-in mice, patient-derived iPSCs |
| CRTC1 | Metabolic disorders, neuronal dysfunction | Knockout mice, overexpression cell lines |
| DLX6-AS1 | Diabetic nephropathy | Podocyte knockdown and overexpression |
| CAMK2 | Neurodegeneration, learning deficits | Point-mutation knock-in mice |
Cancer
CREB and its binding partners are frequently overexpressed or hyperactivated in various cancers, where they drive proliferation, survival, and metastasis. For instance, CREB binding to the promoters of oncogenes can promote tumor growth. Targeting CREB-coactivator interactions is being explored as a therapeutic strategy. Knockout and point-mutation models of CREB or CBP/p300 have been used to validate their roles in cancer cell lines and xenografts.
Neurodegenerative Disorders
Impaired CREB binding and signaling are associated with Alzheimer's disease, Parkinson's disease, and other neurodegenerative conditions [3,4]. Reduced CREB phosphorylation and coactivator recruitment lead to decreased expression of neuroprotective genes. Environmental toxins like lead can disrupt CREB binding, contributing to neurotoxicity. Experimental models using knockout mice or neuronal cell lines with point mutations in CREB phosphorylation sites have elucidated these mechanisms.
Diabetic Nephropathy
In diabetic nephropathy, CREB binding to the promoter of the lncRNA DLX6-AS1 mediates podocyte injury. High glucose levels activate CREB, which then binds and upregulates DLX6-AS1, leading to cytoskeletal damage and apoptosis. Knockdown of CREB or DLX6-AS1 in podocyte models reduces injury, suggesting therapeutic potential.
Cardiovascular Remodeling
CREB binding is involved in cardiac hypertrophy and vascular remodeling. Depending on context, CREB activation can be protective or detrimental. In cardiac myocytes, CREB regulates genes involved in hypertrophy and survival. Knockout and transgenic models have shown that modulating CREB activity affects heart function and remodeling after stress.
From cAMP response element binding protein binding-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does CREB binding to CBP mediate neuroprotection? | CREB1 Ser133Ala knock-in mice |
| What is the role of CREB in cancer cell proliferation? | CREB1 knockout cancer cell lines |
| How does CREB regulate lncRNA DLX6-AS1 in podocytes? | CREB1 knockout podocytes, DLX6-AS1 overexpression |
| Does CRTC2 binding to CREB affect gluconeogenesis? | CRTC2 knockout hepatocytes |
| Can CREB binding be targeted to treat neurodegeneration? | Neuronal cell lines with point mutations in CREB |
| What genes are regulated by CREB in cardiovascular remodeling? | Cardiomyocyte-specific CREB knockout mice |
How to Study the cAMP response element binding protein binding Process
| Method | What It Measures | Typical Application |
|---|---|---|
| ChIP-seq | Genome-wide CREB binding sites | Identify CREB target genes in disease models |
| Co-IP/MS | Protein-protein interactions with CREB | Discover novel CREB-binding partners |
| CRISPR knockout screen | Genes required for CREB binding or activity | Identify therapeutic targets in cancer |
| RNA-seq | Transcriptional changes upon CREB modulation | Assess downstream effects of CREB binding |
| Western blot | CREB phosphorylation and expression levels | Validate signaling changes in models |
| Luciferase reporter | CREB-dependent transcriptional activity | Measure functional impact of binding mutations |
| Proximity ligation assay | In situ detection of CREB-protein interactions | Visualize binding in fixed cells |
| Bioinformatics | Prediction of CREB binding motifs and networks | Integrate multi-omics data |
Chromatin Immunoprecipitation (ChIP)
ChIP with antibodies against CREB or its binding partners identifies genomic regions where CREB binds. This method reveals direct target genes and can be coupled with sequencing (ChIP-seq) for genome-wide mapping.
Co-Immunoprecipitation (Co-IP) and Pull-Down
Co-IP using CREB antibodies followed by mass spectrometry identifies novel CREB-binding proteins. GST pull-down with recombinant CREB domains confirms direct interactions.
CRISPR Screens
Genome-wide CRISPR knockout or activation screens can identify genes that regulate CREB binding or CREB-dependent transcription. These screens are powerful for discovering new components of the CREB pathway.
Bioinformatics and Pathway Analysis
Computational analysis of CREB binding sites, transcriptomics, and proteomics data can predict downstream effects and disease associations. Tools like Enrichr and STRING help integrate CREB interaction networks.
How CRISPR Can Be Used to Study GO:0008140 cAMP response element binding protein binding
Knockout
CRISPR knockout of CREB1 or its binding partners (e.g., CREBBP, CRTC1) in cell lines or primary cells abolishes the binding function, allowing researchers to study loss-of-function phenotypes. For example, CREB1 knockout in cancer cells reduces proliferation and survival. In podocytes, CREB1 knockout decreases DLX6-AS1 expression and injury.
Point Mutation
CRISPR point mutations can introduce specific amino acid changes, such as Ser133Ala in CREB1, to prevent phosphorylation and coactivator binding. These models are invaluable for dissecting phosphorylation-dependent interactions without completely abolishing CREB expression. Point mutations in the KIX domain of CBP can also disrupt CREB binding.
Knock-in
Knock-in of tagged CREB (e.g., GFP or HA) allows for affinity purification and imaging of CREB complexes in live cells. Knock-in of disease-associated mutations in CREB or its partners can model human disorders. For example, knock-in of CREBBP mutations found in Rubinstein-Taybi syndrome helps study disrupted CREB binding.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression of CREB or its binding partners can enhance CREB binding and transcriptional activity. This is useful for studying gain-of-function effects in neurodegeneration or cancer [3,7]. Overexpression of ICER, a repressor, can conversely inhibit CREB binding.
How EDITGENE Supports cAMP response element binding protein binding Research
Researchers studying cAMP response element binding protein binding-related genes often need to determine whether a candidate gene is causally involved in a specific biological process or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models, enabling functional validation of CREB-binding proteins and their roles in health and disease.
Contact EDITGENE today to design your custom CRISPR model for cAMP response element binding protein binding research.
Frequently Asked Questions About cAMP response element binding protein binding
What is GO:0008140?
GO:0008140 is the Gene Ontology molecular function term for binding to a cAMP response element binding protein (CREB), a transcription factor that regulates gene expression in response to cAMP signaling.
What genes are involved in cAMP response element binding protein binding?
Key genes include CREB1, CREBBP, EP300, CRTC1, CRTC2, ATF1, and CREM, which encode proteins that physically interact with CREB.
How is CREB binding regulated?
CREB binding is regulated by phosphorylation at Ser133, which promotes coactivator recruitment, and by dephosphorylation, which terminates the interaction.
What diseases are associated with CREB binding?
Dysregulated CREB binding is implicated in cancer, neurodegenerative disorders, diabetic nephropathy, and cardiovascular remodeling [1,3,5,6].
What methods are used to study CREB binding?
Common methods include ChIP-seq, co-immunoprecipitation, CRISPR screens, RNA-seq, and bioinformatics analysis [1,5,7].
Can CRISPR be used to study CREB binding?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models are widely used to dissect CREB binding function in cells and animals [1,4,7].
What is the role of CREB in cancer?
CREB and its binding partners can drive oncogenic transcription, promoting cancer cell proliferation and survival, making them potential drug targets.
How does CREB binding affect neurons?
CREB binding is essential for neuronal plasticity, survival, and memory formation; its disruption contributes to neurodegeneration [3,4].
What is the KID domain of CREB?
The kinase-inducible domain (KID) of CREB contains Ser133 and is the docking site for coactivators like CBP/p300 upon phosphorylation.
What CRISPR services does EDITGENE offer for CREB research?
EDITGENE provides knockout, point mutation, knock-in, overexpression cell models, CRISPR library screening, and bioinformatics services for CREB-binding genes.
Conclusion
GO:0008140, cAMP response element binding protein binding, represents a critical molecular function that integrates cAMP signaling with gene expression programs. Its roles in cancer, neurodegeneration, metabolic diseases, and cardiovascular biology underscore its importance as a research focus and therapeutic target. Advances in CRISPR-based models and multi-omics approaches continue to unravel the complex interactome of CREB, offering new opportunities for drug discovery and precision medicine.
References
- 1. Hong J et al.. 2025. cAMP response element-binding protein: A credible cancer drug target.. J Pharmacol Exp Ther 392(4):103529 PMID: 40157009
- 2. Innamorati G et al.. 2022. cAMP Response Element-Binding Protein Controls the Appearance of Neuron-Like Traits in Chorion Mesenchymal Cells.. Front Biosci (Landmark Ed) 27(8):249 PMID: 36042162
- 3. Alva S et al.. 2024. Influence of lead on cAMP-response element binding protein (CREB) and its implications in neurodegenerative disorders.. Toxicol Lett 400:35-41 PMID: 39117292
- 4. Khakha N et al.. 2023. Therapeutic implications of phosphorylation- and dephosphorylation-dependent factors of cAMP-response element-binding protein (CREB) in neurodegeneration.. Pharmacol Rep 75(5):1152-1165 PMID: 37688751
- 5. Zheng W et al.. 2022. cAMP-response element binding protein mediates podocyte injury in diabetic nephropathy by targeting lncRNA DLX6-AS1.. Metabolism 129:155155 PMID: 35093327
- 6. Ichiki T. 2006. Role of cAMP response element binding protein in cardiovascular remodeling: good, bad, or both?. Arterioscler Thromb Vasc Biol 26(3):449-55 PMID: 16293792
- 7. Habener JF et al.. 1995. cAMP-dependent regulation of gene transcription by cAMP response element-binding protein and cAMP response element modulator.. Vitam Horm 51:1-57 PMID: 7483321
- 8. Galliot B et al.. 1995. The cAMP response element binding protein is involved in hydra regeneration.. Development 121(4):1205-16 PMID: 7743932
