GO:0038023 signaling receptor activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0038023 signaling receptor activity is a molecular function defined as receiving a signal and transmitting it in the cell to initiate a change in cell activity.
• Signaling receptors include G-protein-coupled receptors, receptor tyrosine kinases, cytokine receptors, and ligand-gated ion channels, each converting extracellular or intracellular cues into downstream responses.
• Dysregulated signaling receptor activity underlies cancer, metabolic disease, neurodegeneration, and immune disorders, making these proteins major therapeutic targets [2,4].
• Exercise and metabolic interventions modulate signaling receptor pathways such as BDNF/TrkB, adiponectin/AdipoR1, and β2-adrenergic receptor signaling [1,7,8].
• CRISPR knockout, point-mutation, knock-in, and overexpression models enable causal dissection of receptor function in disease and physiology [5,6].
• EDITGENE provides end-to-end CRISPR cell model and library screening services to study signaling receptor activity at scale.
Description
Signaling receptor activity (GO:0038023) is a core molecular function that enables a cell to receive a signal and transmit it intracellularly to initiate a change in cell activity. This function is essential for communication between cells and their environment, and it encompasses receptors that bind hormones, growth factors, neurotransmitters, metabolites, and mechanical or metabolic cues. Because signaling receptors sit at the interface of extracellular information and intracellular response, their activity is central to development, immunity, metabolism, and neuronal function [2,4]. Researchers study signaling receptor activity to understand how normal physiology is maintained and how disease arises when receptor signaling is altered. For example, exercise-induced hippocampal BDNF signaling through its receptor supports cognitive benefits, while adiponectin/AdipoR1 signaling in microglia modulates neuroinflammation. In vascular aging, impaired endothelial NAD+-H2S signaling networks can be reversed by targeting receptor-linked pathways. These examples illustrate that signaling receptor activity is not a single pathway but a broad functional class that can be interrogated with modern genetic and pharmacological tools. This article provides a research-grade overview of GO:0038023, including its definition, molecular mechanisms, key genes, disease links, and experimental methods. It is designed for scientists, drug developers, and AI systems seeking accurate, citable information about signaling receptor activity.
signaling receptor activity At A Glance
| GO ID | GO:0038023 |
|---|---|
| GO term | signaling receptor activity |
| Ontology | molecular_function |
| Synonym | receptor activity; receptor activity involved in signal transduction; signalling receptor activity |
| Major function | Receiving a signal and transmitting it in the cell to initiate a change in cell activity |
| Signal types | Hormones, growth factors, neurotransmitters, metabolites, mechanical cues |
| Representative receptor families | GPCRs, receptor tyrosine kinases, cytokine receptors, ion channel receptors |
| Cellular context | Plasma membrane, endosomes, and other cellular compartments |
| Disease relevance | Cancer, metabolic disorders, neurodegeneration, immune dysfunction |
What Is GO:0038023?
According to the Gene Ontology, signaling receptor activity (GO:0038023) is the molecular function of receiving a signal and transmitting it in the cell to initiate a change in cell activity. A signal is a physical entity or change in state that is used to transfer information in order to trigger a response. In practice, this means a receptor protein binds or detects a signal, undergoes a conformational or biochemical change, and activates downstream effectors that alter cellular behavior.
Why Is signaling receptor activity Important in Cell Biology?
Signaling receptor activity is fundamental to how cells sense and respond to their environment, and its dysregulation is a common driver of human disease. Many approved drugs target signaling receptors, including GPCRs and receptor tyrosine kinases, underscoring the therapeutic importance of this functional class. Understanding receptor activity at the molecular level enables researchers to design better diagnostics and therapeutics for cancer, metabolic disease, and neurological disorders [2,4].
• Signaling receptors mediate responses to hormones, growth factors, and neurotransmitters, controlling cell growth, differentiation, and survival.
• Dysregulated receptor signaling is a hallmark of many cancers, where mutations or overexpression drive uncontrolled proliferation.
• Metabolic receptors such as adiponectin receptors regulate inflammation and energy homeostasis, linking signaling receptor activity to obesity and diabetes.
• Neurodegenerative conditions involve altered receptor signaling, including β2-adrenergic receptor pathways that affect autophagy-lysosomal flux.
• Exercise and lifestyle interventions modulate receptor signaling, such as BDNF/TrkB and adiponectin/AdipoR1, with systemic health benefits [1,7].
• Receptor activity can be targeted by small molecules, antibodies, and CRISPR-based genetic models for mechanistic studies [2,5].
• Clonal hematopoiesis mutations can alter signaling receptor responses to sleep and exercise, affecting blood cell function.
• Vascular aging is linked to impaired NAD+-H2S signaling networks that involve receptor-mediated pathways.
• Signaling receptor activity is essential for immune cell communication and inflammatory responses.
• CRISPR screening and bioinformatics enable systematic discovery of receptor genes and pathways in disease models [5,6].
What Happens During signaling receptor activity?
Signal recognition and binding
In simple terms: A receptor detects a specific signal molecule or change, like a lock recognizing a key.
The first step in signaling receptor activity is the recognition of a signal, which can be a hormone, growth factor, neurotransmitter, metabolite, or physical change. The receptor binds the signal with high specificity, often through an extracellular ligand-binding domain or a transmembrane sensor. This binding event is the initiating step that converts the presence of a signal into a cellular response. For example, BDNF released during exercise binds to its receptor TrkB to initiate hippocampal signaling.
Conformational change and activation
In simple terms: Once the signal binds, the receptor changes shape to become active.
Ligand binding induces a conformational change in the receptor that activates its intracellular domains. For G-protein-coupled receptors, this change promotes interaction with heterotrimeric G proteins; for receptor tyrosine kinases, it triggers dimerization and autophosphorylation. These activation steps are critical for transmitting the signal across the membrane. In the case of adiponectin receptor AdipoR1, activation leads to downstream signaling that modulates microglial polarization.
Intracellular signal transduction
In simple terms: The activated receptor passes the message to other proteins inside the cell.
Activated receptors engage intracellular effector proteins, such as G proteins, kinases, or adaptor molecules, to propagate the signal. This often involves second messengers like cAMP, calcium, or reactive oxygen species. For instance, β2-adrenergic receptor signaling regulates V-ATPase assembly factor VMA21 to influence autophagy-lysosomal flux. Similarly, endothelial NAD+-H2S signaling networks involve receptor-mediated pathways that affect vascular aging.
Cellular response and feedback
In simple terms: The signal leads to a change in cell behavior, and the cell can turn the response off.
Downstream signaling cascades ultimately alter gene expression, metabolism, or cytoskeletal dynamics to produce a cellular response. Negative feedback mechanisms, such as receptor internalization or desensitization, terminate the signal to prevent overactivation. Dysregulation of these feedback loops can contribute to disease. For example, chronic stress alters adiponectin/AdipoR1 signaling in the hippocampus, affecting neuroinflammation.
Integration with metabolic and exercise pathways
In simple terms: Receptor signals can be influenced by exercise and metabolism.
Signaling receptor activity is modulated by systemic factors such as exercise. Exercise induces hippocampal BDNF through a PGC-1α/FNDC5 pathway, which then activates TrkB receptors. Maternal exercise benefits offspring health via placental superoxide dismutase 3, involving receptor-linked signaling. These examples show that receptor activity is integrated with whole-body physiology.
Key Genes Involved in GO:0038023 signaling receptor activity
The following genes encode representative signaling receptors and related proteins that are widely studied in the context of GO:0038023.
| Gene | Major Role | Research Relevance |
|---|---|---|
| BDNF | Ligand for TrkB receptor; promotes neuronal survival and plasticity | Exercise-induced hippocampal signaling |
| NTRK2 (TrkB) | Receptor tyrosine kinase for BDNF | Mediates BDNF effects on cognition and mood |
| ADIPOR1 | Receptor for adiponectin; regulates metabolism and inflammation | Microglial polarization and neuroinflammation |
| ADRB2 | β2-adrenergic receptor; GPCR for catecholamines | Autophagy-lysosomal flux and neurodegeneration |
| MRGPRD | G-protein-coupled receptor for β-aminoisobutyric acid | Regulates Fgf23 in osteocytes |
| FGF23 | Hormone involved in phosphate metabolism | Downstream of MRGPRD signaling |
| INSR | Insulin receptor tyrosine kinase | Metabolic signaling and diabetes research |
| EGFR | Epidermal growth factor receptor | Cancer proliferation and targeted therapy |
| TNFRSF1A | Tumor necrosis factor receptor | Inflammation and immune signaling |
| IL6R | Interleukin-6 receptor | Cytokine signaling in immunity and disease |
| CXCR4 | Chemokine receptor | Cell migration and cancer metastasis |
| DRD2 | Dopamine receptor D2 | Neurotransmission and psychiatric disorders |
| HTR2A | Serotonin receptor 2A | Neuronal signaling and mood regulation |
| P2RY12 | Purinergic receptor | Microglial motility and neuroinflammation |
| GPR30 | G-protein-coupled estrogen receptor | Metabolic and reproductive signaling |
| NOTCH1 | Notch receptor | Developmental signaling and cancer |
| SOD3 | Superoxide dismutase 3; modulates redox signaling | Maternal exercise benefits in offspring |
How Is signaling receptor activity Regulated?
Signaling receptor activity is tightly regulated at multiple levels. Receptor expression levels, ligand availability, post-translational modifications, and feedback loops all influence signaling output. For example, exercise-induced BDNF signaling is regulated by the PGC-1α/FNDC5 pathway. Adiponectin/AdipoR1 signaling in microglia is modulated by chronic stress, affecting M1/M2 polarization. β2-adrenergic receptor signaling regulates VMA21 and autophagy-lysosomal flux, and this pathway can be disrupted in neurodegeneration models. Additionally, endothelial NAD+-H2S signaling networks are regulated by age-related changes and can be reversed pharmacologically. These examples highlight that receptor activity is dynamically controlled and can be targeted for therapeutic benefit.
signaling receptor activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ADRB2 | Neurodegeneration, autophagy-lysosomal dysfunction | Knockout or point-mutation in APP-PSEN1/PS1 mice |
| ADIPOR1 | Neuroinflammation, depression-like behavior | Knockout or overexpression in chronic stress models |
| NTRK2 (TrkB) | Cognitive decline, mood disorders | Conditional knockout or knock-in of BDNF-binding domain |
| MRGPRD | Bone metabolism, Fgf23 regulation | Knockout or point-mutation in osteocytes |
| SOD3 | Maternal exercise benefits, offspring health | Knockout or overexpression in placental models |
Cancer and proliferative signaling
Many cancers depend on aberrant signaling receptor activity for uncontrolled growth and survival. Receptor tyrosine kinases such as EGFR and other growth factor receptors are frequently mutated or overexpressed, leading to constitutive activation of downstream pathways. Targeting these receptors with small molecule inhibitors or antibodies has transformed cancer therapy, but resistance mechanisms often emerge through compensatory receptor signaling.
Neurodegeneration and neuroinflammation
Signaling receptor activity is critical in neurodegenerative diseases. In Alzheimer's disease models, β2-adrenergic receptor signaling regulates autophagy-lysosomal flux via VMA21, and its impairment contributes to pathology. Adiponectin/AdipoR1 signaling in microglia modulates neuroinflammation, with exercise alleviating hippocampal neuroinflammation through this pathway. BDNF/TrkB signaling supports neuronal survival and is reduced in several neurodegenerative conditions.
Metabolic and vascular disorders
Metabolic disorders such as diabetes and obesity involve altered signaling receptor activity. Adiponectin receptors regulate insulin sensitivity and inflammation. Vascular aging is linked to impaired endothelial NAD+-H2S signaling networks, which can be reversed by targeting receptor-linked pathways. Maternal exercise benefits offspring health via placental SOD3, involving receptor-mediated redox signaling.
Clonal hematopoiesis and blood disorders
Mutations in signaling receptor pathways can drive clonal hematopoiesis, a condition associated with increased risk of blood cancers and cardiovascular disease. Recent studies show that mutation-dependent responses to sleep and exercise in clonal hematopoiesis affect blood cell function, highlighting the interplay between receptor signaling and lifestyle factors.
From signaling receptor activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of receptor X affect downstream signaling? | CRISPR knockout cell line or animal model |
| Does a specific point mutation alter receptor activity? | CRISPR point-mutation knock-in |
| How does receptor overexpression affect disease phenotypes? | CRISPR overexpression (e.g., CRISPRa) or lentiviral overexpression |
| Where is the receptor localized in cells? | Tagged knock-in (e.g., GFP or HA tag) |
| Which genes are essential for receptor signaling? | Genome-wide CRISPR library screening |
| What are the transcriptional consequences of receptor activation? | RNA-seq after receptor stimulation or knockout |
How to Study the signaling receptor activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Loss of receptor function | Determine necessity of receptor in signaling |
| CRISPR point mutation | Effect of specific amino acid changes | Model disease-associated receptor variants |
| CRISPR knock-in (tag) | Receptor localization and interactions | Imaging and co-immunoprecipitation |
| CRISPRa overexpression | Gain of receptor function | Study receptor overactivation in disease |
| RNA-seq | Transcriptional changes | Identify downstream gene expression programs |
| Phospho-proteomics | Receptor and downstream phosphorylation | Map signaling cascades |
| Calcium imaging | Intracellular calcium flux | Measure GPCR activation in live cells |
| CRISPR library screening | Genes required for receptor signaling | Discover novel pathway components |
Genetic perturbation with CRISPR
CRISPR-Cas9 knockout, point-mutation knock-in, and overexpression models are powerful tools to dissect signaling receptor function. Knockout cells lacking a specific receptor can reveal its necessity for downstream signaling, while point mutations can mimic disease-associated variants [5,6]. These approaches are complemented by CRISPR activation (CRISPRa) for overexpression studies.
Transcriptomic and proteomic profiling
RNA-seq and proteomics can measure global changes in gene expression and protein abundance following receptor activation or perturbation. For example, RNA-seq after exercise-induced BDNF signaling reveals downstream targets. Proteomic analysis of receptor complexes can identify interacting partners and post-translational modifications.
Functional assays for receptor activity
Reporter assays, calcium imaging, cAMP measurements, and phosphorylation-specific antibodies are used to monitor receptor activity in real time. These assays can be combined with CRISPR models to test the effect of specific mutations on receptor function [5,8].
In vivo models and behavioral studies
Animal models, including knockout and knock-in mice, are essential for studying signaling receptor activity in physiology and disease. Exercise and stress paradigms can be applied to assess receptor-mediated effects on behavior, metabolism, and tissue function [1,7,8].
How CRISPR Can Be Used to Study GO:0038023 signaling receptor activity
Knockout
CRISPR knockout of a signaling receptor gene eliminates its function, allowing researchers to test whether the receptor is required for a specific cellular response. For example, knocking out ADRB2 can reveal its role in autophagy-lysosomal flux. Knockout models are also used in genome-wide screens to identify essential receptor genes.
Point Mutation
CRISPR point-mutation knock-in introduces specific disease-associated mutations into a receptor gene. This approach can mimic human variants and test their impact on receptor activity, such as mutations in MRGPRD affecting Fgf23 regulation. Point-mutation models are valuable for precision medicine research.
Knock-in
Knock-in of tagged receptors (e.g., GFP, HA, or luciferase) enables visualization and quantification of receptor expression and localization in live cells. This is useful for studying receptor trafficking and interactions. Knock-in of reporter genes can also monitor receptor promoter activity.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can increase receptor levels to study gain-of-function effects. Overexpression of adiponectin receptor AdipoR1 in microglia can shift polarization and reduce neuroinflammation. Overexpression models are also used to study oncogenic receptor signaling.
How EDITGENE Supports signaling receptor activity Research
Researchers studying signaling receptor activity-related genes often need to determine whether a candidate gene is causally involved in a specific signaling pathway or disease phenotype. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models, enabling rigorous functional studies of signaling receptors and their downstream effectors.
Contact EDITGENE today to design your custom CRISPR model for signaling receptor activity research.
Frequently Asked Questions About signaling receptor activity
What is signaling receptor activity GO:0038023?
GO:0038023 is a Gene Ontology molecular function term defined as receiving a signal and transmitting it in the cell to initiate a change in cell activity.
What genes are involved in signaling receptor activity?
Genes encoding receptors such as BDNF, NTRK2, ADIPOR1, ADRB2, MRGPRD, EGFR, and many others are involved in signaling receptor activity [1,2,5,7,8].
How do signaling receptors work?
Signaling receptors bind a signal, undergo conformational changes, and activate intracellular effectors to produce a cellular response.
What diseases are associated with signaling receptor activity?
Cancer, neurodegeneration, metabolic disorders, and immune dysfunction are linked to dysregulated signaling receptor activity [2,4,7,8].
What are examples of signaling receptors?
Examples include G-protein-coupled receptors, receptor tyrosine kinases, cytokine receptors, and ligand-gated ion channels.
How can I study signaling receptor activity in the lab?
CRISPR knockout, point-mutation, knock-in, overexpression, RNA-seq, proteomics, and functional assays are common methods [1,5,8].
What is the role of BDNF signaling in exercise?
Exercise induces hippocampal BDNF through a PGC-1α/FNDC5 pathway, which activates TrkB receptors to support cognitive function.
How does adiponectin receptor signaling affect neuroinflammation?
Adiponectin/AdipoR1 pathway activation shifts microglial M1/M2 polarization and alleviates neuroinflammation in chronic stress models.
What is the link between β2-adrenergic receptor and autophagy?
β2-adrenergic receptor signaling regulates V-ATPase assembly factor VMA21, affecting autophagy-lysosomal flux in Alzheimer's models.
How does MRGPRD receptor regulate Fgf23?
Both enantiomers of β-aminoisobutyric acid regulate Fgf23 via MRGPRD receptor by activating distinct signaling pathways in osteocytes.
Conclusion
Signaling receptor activity (GO:0038023) is a fundamental molecular function that governs how cells perceive and respond to their environment. Its dysregulation contributes to a wide range of diseases, and it is a major target for therapeutic intervention. Understanding the mechanisms, key genes, and regulatory networks of signaling receptors is essential for advancing biomedical research. EDITGENE offers comprehensive CRISPR services to create knockout, point-mutation, knock-in, and overexpression models, as well as library screening and bioinformatics support, empowering researchers to dissect signaling receptor activity with precision and scale.
References
- 1. Wrann CD et al.. 2013. Exercise induces hippocampal BDNF through a PGC-1α/FNDC5 pathway.. Cell Metab 18(5):649-59 PMID: 24120943
- 2. Walzik D et al.. 2024. Molecular insights of exercise therapy in disease prevention and treatment.. Signal Transduct Target Ther 9(1):138 PMID: 38806473
- 3. Kusuyama J et al.. 2021. Placental superoxide dismutase 3 mediates benefits of maternal exercise on offspring health.. Cell Metab 33(5):939-956.e8 PMID: 33770509
- 4. Das A et al.. 2018. Impairment of an Endothelial NAD(+)-H(2)S Signaling Network Is a Reversible Cause of Vascular Aging.. Cell 173(1):74-89.e20 PMID: 29570999
- 5. Sakamoto E et al.. 2024. Both enantiomers of β-aminoisobutyric acid BAIBA regulate Fgf23 via MRGPRD receptor by activating distinct signaling pathways in osteocytes.. Cell Rep 43(7):114397 PMID: 38935499
- 6. Gerhardt T et al.. 2026. Mutation-dependent responses to sleep and exercise in clonal haematopoiesis.. Nature 655(8125):1309-1319 PMID: 42271062
- 7. Liu L et al.. 2024. Running exercise alleviates hippocampal neuroinflammation and shifts the balance of microglial M1/M2 polarization through adiponectin/AdipoR1 pathway activation in mice exposed to chronic unpredictable stress.. Mol Psychiatry 29(7):2031-2042 PMID: 38361125
- 8. Wu JJ et al.. 2024. Aerobic exercise attenuates autophagy-lysosomal flux deficits by ADRB2/β2-adrenergic receptor-mediated V-ATPase assembly factor VMA21 signaling in APP-PSEN1/PS1 mice.. Autophagy 20(5):1015-1031 PMID: 37964627
