GO:0016493 C-C chemokine receptor activity: Mechanism, Genes and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0016493 (C-C chemokine receptor activity) is a molecular function that combines with C-C chemokines and transmits signals across the membrane to initiate changes in cell activity.
• C-C chemokine receptors are seven-transmembrane G protein-coupled receptors that regulate immune cell trafficking, inflammation, and tissue homeostasis.
• CCR5 signaling contributes to acute graft-versus-host disease and cardiac remodeling under pressure overload.
• CCR1 activation modulates α1B-adrenoceptor and arginine vasopressin receptor 1A signaling, revealing crosstalk with other GPCRs.
• CCR4-positive regulatory T cells interact with tumor-associated macrophages to promote metastatic potential after radiation.
• CCR5 is essential for conventional NK cell trafficking and liver injury in viral fulminant hepatic failure models.
Description
C-C chemokine receptor activity (GO:0016493) is a molecular function defined as combining with a C-C chemokine and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity. C-C chemokines are characterized by a conserved four-cysteine motif in which the first two cysteines are adjacent, lacking an intervening amino acid. This activity is central to immune surveillance, inflammation, and tissue repair, and its dysregulation is implicated in diverse pathologies including graft-versus-host disease, cardiac remodeling, and cancer metastasis. Researchers study this term to understand how chemokine gradients are interpreted by cells and to develop therapeutic strategies that modulate receptor signaling. The molecular function is mediated by seven-transmembrane G protein-coupled receptors (GPCRs) that couple to heterotrimeric G proteins, triggering downstream cascades such as calcium mobilization and chemotaxis. Because C-C chemokine receptors are expressed on leukocytes, endothelial cells, and tumor cells, their activity influences both physiological immune responses and pathological processes.
C-C chemokine receptor activity At A Glance
| GO ID | GO:0016493 |
|---|---|
| GO term | C-C chemokine receptor activity |
| Ontology | molecular_function |
| Synonym | none |
| Major function | Combining with a C-C chemokine and transmitting the signal across the membrane to initiate a change in cell activity |
| Ligand class | C-C chemokines with a four-cysteine motif where the first two cysteines are adjacent |
| Receptor family | Seven-transmembrane G protein-coupled receptors (GPCRs) |
| Representative genes | CCR1, CCR4, CCR5 |
| Associated diseases | Graft-versus-host disease, cardiac remodeling, cancer metastasis, fulminant hepatic failure |
What Is GO:0016493?
C-C chemokine receptor activity (GO:0016493) is the molecular function of binding to a C-C chemokine ligand and transducing that binding event across the plasma membrane to initiate intracellular signaling and a subsequent change in cell behavior. C-C chemokines are distinguished by a four-cysteine motif where the first two cysteines are adjacent, with no intervening amino acid. This activity is typically executed by seven-transmembrane GPCRs that activate heterotrimeric G proteins, leading to downstream effects such as chemotaxis, cytokine production, and cell survival.
Why Is C-C chemokine receptor activity Important in Cell Biology?
C-C chemokine receptor activity is essential for coordinating immune cell migration and positioning, making it a critical node in inflammation, host defense, and tissue repair. Dysregulated activity of these receptors contributes to autoimmune diseases, transplant rejection, cardiovascular pathology, and tumor progression. Because these receptors are GPCRs, they are highly druggable, and small-molecule antagonists have shown efficacy in preclinical models of disc inflammation. Understanding the precise molecular mechanisms of C-C chemokine receptor activity therefore informs both basic immunology and therapeutic development.
• Regulates leukocyte trafficking and recruitment to sites of inflammation.
• Modulates cardiac remodeling and dysfunction under pressure overload.
• Contributes to acute graft-versus-host disease pathogenesis.
• Promotes metastatic potential after radiation via CCR4-positive regulatory T cells.
• Essential for conventional NK cell trafficking and liver injury in viral fulminant hepatic failure.
• Crosstalks with other GPCRs such as α1B-adrenoceptor and arginine vasopressin receptor 1A.
• Small molecule antagonists of CCR1 reduce disc inflammation in rabbit models.
• Expressed on mature dendritic cells and involved in chemotaxis and CCL18 induction.
• Implicated in lupus nephritis through viral double-stranded RNA and TLR3 signaling.
• Provides targets for therapeutic intervention in inflammatory and autoimmune diseases.
What Happens During C-C chemokine receptor activity?
Ligand binding and receptor activation
In simple terms: A chemokine molecule docks onto the receptor, flipping a molecular switch inside the cell.
C-C chemokine receptor activity begins when a C-C chemokine binds to the extracellular loops of a seven-transmembrane GPCR. This binding induces conformational changes that propagate through the transmembrane helices, enabling the receptor to act as a guanine nucleotide exchange factor for heterotrimeric G proteins. The specificity of this interaction is determined by the C-C chemokine motif, where the first two cysteines are adjacent. For example, CCR5 signaling is triggered by its cognate ligands and contributes to cardiac remodeling under pressure overload.
G protein activation and second messenger generation
In simple terms: The activated receptor turns on G proteins, which then produce small messenger molecules inside the cell.
Upon activation, the receptor catalyzes the exchange of GDP for GTP on the Gα subunit of heterotrimeric G proteins. This leads to dissociation of Gα and Gβγ subunits, which then modulate downstream effectors such as adenylyl cyclase and phospholipase C. The resulting second messengers, including cAMP and calcium, initiate signaling cascades that alter cell behavior. CCR1 activation has been shown to modulate α1B-adrenoceptor and arginine vasopressin receptor 1A signaling, demonstrating crosstalk between chemokine receptors and other GPCRs.
Downstream cellular responses
In simple terms: The signal leads to cell movement, activation, or changes in gene expression.
Downstream of G protein activation, C-C chemokine receptor activity drives chemotaxis, integrin activation, and cytokine production. In conventional NK cells, CCR5 signaling is essential for trafficking to the liver during viral fulminant hepatic failure. Mature dendritic cells express functional thrombin receptors that trigger chemotaxis and induce CCL18, illustrating how chemokine receptor activity integrates with other stimuli. These responses are critical for immune cell positioning and function.
Receptor desensitization and internalization
In simple terms: After signaling, the receptor is turned off and pulled inside the cell to prevent overstimulation.
Following activation, C-C chemokine receptors are phosphorylated by G protein-coupled receptor kinases and bind β-arrestins, leading to desensitization and internalization. This negative feedback prevents excessive signaling and allows cells to adapt to changing chemokine gradients. Dysregulation of this process can contribute to chronic inflammation and disease.
Key Genes Involved in GO:0016493 C-C chemokine receptor activity
The following genes encode receptors, ligands, and signaling components directly associated with C-C chemokine receptor activity (GO:0016493).
| Gene | Major Role | Research Relevance |
|---|---|---|
| CCR1 | Receptor for C-C chemokines; modulates GPCR crosstalk | Studied in disc inflammation and cardiac signaling |
| CCR4 | Receptor on regulatory T cells; interacts with tumor-associated macrophages | Linked to metastatic potential after radiation |
| CCR5 | Receptor for C-C chemokines; mediates NK cell trafficking and cardiac remodeling | Implicated in graft-versus-host disease and liver injury |
| CCL18 | C-C chemokine ligand induced in dendritic cells | Involved in chemotaxis and immune regulation |
| CCL5 | C-C chemokine ligand for CCR5 | Studied in inflammation and cardiac remodeling |
| CCL3 | C-C chemokine ligand for CCR1 and CCR5 | Associated with immune cell recruitment |
| CCL4 | C-C chemokine ligand for CCR5 | Implicated in NK cell trafficking |
| CCL2 | C-C chemokine ligand for CCR2 | Studied in inflammation and lupus nephritis |
| CCL22 | C-C chemokine ligand for CCR4 | Involved in regulatory T cell recruitment |
| CCL17 | C-C chemokine ligand for CCR4 | Associated with tumor microenvironment |
| GNAI1 | G protein alpha subunit | Mediates signaling downstream of chemokine receptors |
| GNAI2 | G protein alpha subunit | Mediates signaling downstream of chemokine receptors |
| GNAI3 | G protein alpha subunit | Mediates signaling downstream of chemokine receptors |
| ARRB1 | Beta-arrestin 1 | Regulates receptor desensitization and internalization |
| ARRB2 | Beta-arrestin 2 | Regulates receptor desensitization and internalization |
| GRK2 | G protein-coupled receptor kinase 2 | Phosphorylates activated chemokine receptors |
| GRK5 | G protein-coupled receptor kinase 5 | Phosphorylates activated chemokine receptors |
How Is C-C chemokine receptor activity Regulated?
C-C chemokine receptor activity is regulated at multiple levels, including ligand availability, receptor expression, and post-translational modifications. Receptor desensitization and internalization are controlled by G protein-coupled receptor kinases and β-arrestins. In cardiac remodeling, CCR5 signaling is upregulated under pressure overload, suggesting transcriptional or post-transcriptional regulation. Viral double-stranded RNA can aggravate lupus nephritis through TLR3 on glomerular mesangial cells and antigen-presenting cells, indirectly influencing chemokine receptor activity. Small molecule antagonists can block CCR1 activity, providing pharmacological regulation.
C-C chemokine receptor activity and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CCR5 | Acute graft-versus-host disease | Mouse models of allogeneic hematopoietic stem cell transplantation |
| CCR5 | Cardiac remodeling under pressure overload | Transverse aortic constriction mouse model |
| CCR4 | Cancer metastasis after radiation | Tumor-bearing mice with radiation therapy |
| CCR5 | Fulminant hepatic failure | Murine hepatitis virus-induced liver injury model |
| CCR1 | Disc inflammation | Rabbit model of disc inflammation |
Graft-versus-host disease
C-C chemokine receptor 5 (CCR5) signaling is critically involved in the pathogenesis of acute graft-versus-host disease, where it mediates donor T cell trafficking to target organs. Targeting CCR5 may offer therapeutic benefit in transplant recipients.
Cardiac remodeling and dysfunction
CCR5 signaling contributes to cardiac remodeling and dysfunction under pressure overload, highlighting a role for C-C chemokine receptor activity in cardiovascular disease. Modulation of this pathway could attenuate maladaptive cardiac hypertrophy.
Cancer metastasis
CCR4-positive regulatory T cells interact with tumor-associated macrophages to facilitate metastatic potential after radiation, linking C-C chemokine receptor activity to tumor progression. Blocking CCR4 may reduce metastasis in irradiated tumors.
Fulminant hepatic failure
CCR5 is essential for conventional NK cell trafficking and liver injury in a murine hepatitis virus-induced fulminant hepatic failure model, demonstrating a role in acute liver injury. Inhibiting CCR5 could mitigate liver damage.
From C-C chemokine receptor activity-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does CCR5 loss prevent graft-versus-host disease? | CCR5 knockout mouse in allogeneic transplant model |
| Does CCR5 point mutation alter cardiac remodeling? | Knock-in mouse expressing mutant CCR5 |
| Does CCR4 overexpression enhance metastasis? | Knock-in mouse with CCR4 overexpression in T cells |
| Does CCR1 antagonism reduce disc inflammation? | Rabbit model treated with small molecule antagonist |
| Does CCR5 tagging reveal trafficking in NK cells? | Tagged knock-in mouse for CCR5 |
| Does CCR5 knockout affect liver injury? | CCR5 knockout mouse with viral hepatitis |
How to Study the C-C chemokine receptor activity Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout | Loss of receptor function | Studying CCR5 in graft-versus-host disease |
| Knock-in point mutation | Effect of specific receptor variants | Analyzing CCR5 signaling in cardiac remodeling |
| Tagged knock-in | Receptor localization and trafficking | Tracking CCR5 in NK cells |
| Small molecule antagonist | Pharmacological inhibition of receptor activity | Reducing disc inflammation in rabbits |
| Flow cytometry | Receptor expression on cell subsets | Quantifying CCR4 on regulatory T cells |
| Chemotaxis assay | Cell migration in response to chemokines | Assessing dendritic cell chemotaxis |
| Calcium imaging | G protein-mediated calcium flux | Measuring CCR1 activation |
Genetic knockout and knock-in models
CRISPR-Cas9 mediated knockout of C-C chemokine receptor genes in mice or cell lines allows assessment of loss-of-function phenotypes in disease models such as graft-versus-host disease and cardiac remodeling. Knock-in of point mutations or tags enables precise interrogation of receptor signaling and trafficking.
Pharmacological inhibition
Small molecule antagonists of CCR1 have been used to reduce disc inflammation in rabbit models, demonstrating the utility of pharmacological tools to study C-C chemokine receptor activity. Such compounds can complement genetic approaches.
Flow cytometry and chemotaxis assays
Flow cytometry can quantify receptor expression on immune cell subsets, while chemotaxis assays measure functional responses to C-C chemokines. These methods are essential for linking receptor activity to cell migration.
Signal transduction analysis
Western blotting, calcium imaging, and cAMP assays can measure downstream signaling events following receptor activation. These techniques help dissect the molecular mechanisms of C-C chemokine receptor activity.
How CRISPR Can Be Used to Study GO:0016493 C-C chemokine receptor activity
Knockout
CRISPR-Cas9 knockout of CCR5 in mice or human cells can abolish C-C chemokine receptor activity, enabling studies of its role in graft-versus-host disease, cardiac remodeling, and NK cell trafficking. Knockout models are valuable for validating therapeutic targets.
Point Mutation
Introducing point mutations into C-C chemokine receptor genes via CRISPR can mimic naturally occurring variants or disrupt specific signaling motifs, allowing precise dissection of receptor function in cardiac and immune contexts.
Knock-in
Knock-in of tagged or reporter versions of C-C chemokine receptors using CRISPR facilitates real-time tracking of receptor expression and trafficking in vivo, as demonstrated for CCR5 in NK cells.
Overexpression
CRISPR-mediated overexpression of CCR4 in T cells can enhance metastatic potential in tumor models, providing a gain-of-function approach to study C-C chemokine receptor activity in cancer.
How EDITGENE Supports C-C chemokine receptor activity Research
Researchers studying C-C chemokine receptor activity-related genes often need to determine whether a candidate gene is causally involved in immune cell trafficking, inflammation, or disease progression. EDITGENE provides comprehensive CRISPR-based services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for C-C chemokine receptor activity research.
Related Products
| Product name | Cat.No. | Species | Gene ID | |
|---|---|---|---|---|
| CXCR2 Knockout HEK293 Cell Line | EDJ-KQ271 | Human | 3579 | Details Get a Quote |
| CCR2 Knockout HEK293 Cell Line | EDJ-KQ442 | Human | 729230 | Details Get a Quote |
| CCR7 Knockout HEK293 Cell Line | EDJ-KQ1367 | Human | 1236 | Details Get a Quote |
| CXCR4 Knockout HEK293 Cell Line | EDJ-KQ1608 | Human | 7852 | Details Get a Quote |
| CXCR1 Knockout HEK293 Cell Line | EDJ-KQ1723 | Human | 3577 | Details Get a Quote |
| MRGPRX2 Knockout HEK293 Cell Line | EDJ-KQ2136 | Human | 117194 | Details Get a Quote |
| ACKR3 Knockout HEK293 Cell Line | EDJ-KQ2468 | Human | 57007 | Details Get a Quote |
| CCR4 Knockout HEK293 Cell Line | EDJ-KQ3206 | Human | 1233 | Details Get a Quote |
| CCR10 Knockout HEK293 Cell Line | EDJ-KQ3228 | Human | 2826 | Details Get a Quote |
| CCR8 Knockout HEK293 Cell Line | EDJ-KQ3618 | Human | 1237 | Details Get a Quote |
| CX3CR1 Knockout HEK293 Cell Line | EDJ-KQ3859 | Human | 1524 | Details Get a Quote |
| CCR3 Knockout HEK293 Cell Line | EDJ-KQ4298 | Human | 1232 | Details Get a Quote |
| ACKR2 Knockout HEK293 Cell Line | EDJ-KQ4299 | Human | 1238 | Details Get a Quote |
| CCR1 Knockout HEK293 Cell Line | EDJ-KQ4300 | Human | 1230 | Details Get a Quote |
| XCR1 Knockout HEK293 Cell Line | EDJ-KQ4756 | Human | 2829 | Details Get a Quote |
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Frequently Asked Questions About C-C chemokine receptor activity
What is C-C chemokine receptor activity?
C-C chemokine receptor activity (GO:0016493) is a molecular function where a receptor binds a C-C chemokine and transmits a signal across the membrane to change cell behavior.
What genes are involved in C-C chemokine receptor activity?
Key genes include CCR1, CCR4, and CCR5, which encode seven-transmembrane GPCRs that mediate responses to C-C chemokines.
How does C-C chemokine receptor signaling work?
Ligand binding activates heterotrimeric G proteins, leading to second messenger production and downstream cellular responses such as chemotaxis.
What diseases are associated with C-C chemokine receptor activity?
It is implicated in graft-versus-host disease, cardiac remodeling, cancer metastasis, and fulminant hepatic failure.
What is the role of CCR5 in disease?
CCR5 signaling contributes to acute graft-versus-host disease, cardiac remodeling under pressure overload, and NK cell trafficking in liver injury.
How can I study C-C chemokine receptor activity in the lab?
Common methods include CRISPR knockout, point mutation knock-in, pharmacological inhibition, flow cytometry, and chemotaxis assays.
What are the therapeutic implications of targeting C-C chemokine receptors?
Small molecule antagonists of CCR1 reduce disc inflammation, and blocking CCR5 may benefit transplant and cardiac patients.
What is the difference between C-C and C-X-C chemokine receptors?
C-C chemokines have adjacent first two cysteines, while C-X-C chemokines have an intervening amino acid; this defines distinct receptor families.
Can CRISPR be used to model C-C chemokine receptor mutations?
Yes, CRISPR can introduce point mutations or knockouts in genes like CCR5 to study their function in disease models.
What cell types express C-C chemokine receptors?
They are expressed on leukocytes, dendritic cells, NK cells, and some tumor cells, among others.
Conclusion
C-C chemokine receptor activity (GO:0016493) is a fundamental molecular function that governs immune cell trafficking and tissue responses through seven-transmembrane GPCRs. Its dysregulation contributes to a range of diseases, including graft-versus-host disease, cardiac remodeling, and cancer metastasis. Continued research using CRISPR-based models and pharmacological tools will further elucidate its mechanisms and therapeutic potential.
References
- 1. Yuan J et al.. 2022. C-C chemokine receptor 5 and acute graft-versus-host disease.. Immun Inflamm Dis 10(9):e687 PMID: 36039647
- 2. Gao X et al.. 2025. Activation of Chemokine (C-C Motif) Receptor 1 Modulates α(1B)-Adrenoceptor and Arginine Vasopressin Receptor 1A Signaling and Function.. J Am Heart Assoc 14(17):e040708 PMID: 40820981
- 3. Chiang Y et al.. 2024. C-C chemokine receptor 4 (CCR4)-positive regulatory T cells interact with tumor-associated macrophages to facilitate metastatic potential after radiation.. Eur J Cancer 198:113521 PMID: 38171115
- 4. Wang X et al.. 2021. C-C chemokine receptor 5 signaling contributes to cardiac remodeling and dysfunction under pressure overload.. Mol Med Rep 23(1) PMID: 33200795
- 5. Liu YH et al.. 2023. C-C chemokine receptor 5 is essential for conventional NK cell trafficking and liver injury in a murine hepatitis virus-induced fulminant hepatic failure model.. J Transl Med 21(1):865 PMID: 38017505
- 6. Li X et al.. 2008. Mature dendritic cells express functional thrombin receptors triggering chemotaxis and CCL18/pulmonary and activation-regulated chemokine induction.. J Immunol 181(2):1215-23 PMID: 18606675
- 7. Chou PH et al.. 2020. Small molecule antagonist of C-C chemokine receptor 1 (CCR1) reduces disc inflammation in the rabbit model.. Spine J 20(12):2025-2036 PMID: 32673730
- 8. Patole PS et al.. 2005. Viral double-stranded RNA aggravates lupus nephritis through Toll-like receptor 3 on glomerular mesangial cells and antigen-presenting cells.. J Am Soc Nephrol 16(5):1326-38 PMID: 15772251
