GO:1905540 interleukin-7 receptor complex: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:1905540 (interleukin-7 receptor complex) is a cellular_component term describing a protein complex that binds interleukin-7 (IL-7) and consists of at minimum an interleukin, an alpha chain and a gamma chain, with optional additional kinase subunits.
• The IL-7 receptor alpha chain (IL7R) binds IL-7 with high affinity and subsequently recruits the common gamma chain (IL2RG), which is shared by multiple interleukin receptors.
• IL-7 and its receptor complex are central to T cell development, homeostasis and survival, and are implicated in autoimmune diseases such as type 1 diabetes and coeliac disease.
• The IL-7 receptor complex is also expressed in human solid tumours, where it can influence tumour cell proliferation and survival.
• Experimental dissection of the IL-7 receptor complex benefits from CRISPR knockout, point-mutation, knock-in and overexpression models, combined with proteomics and transcriptomics.
• Understanding the assembly and signalling of the IL-7 receptor complex offers therapeutic opportunities in autoimmunity, allergy and cancer.
Description
The interleukin-7 receptor complex (GO:1905540) is a cell-surface protein assembly that binds the cytokine interleukin-7 (IL-7) and transduces its signals into the cell. According to the Gene Ontology, this complex consists of, at a minimum, an interleukin, an alpha chain and a gamma chain, and may include additional kinase subunits. The alpha chain (IL7R) binds IL-7 with high affinity and then associates with the common gamma chain (IL2RG), a shared subunit of several interleukin receptors. This receptor complex is a critical regulator of lymphocyte development and homeostasis, and its dysfunction is linked to autoimmune and malignant diseases. For researchers, GO:1905540 provides a precise annotation for the molecular machine that mediates IL-7 signalling. The complex is not merely a passive binding site; its assembly and post-translational modifications control downstream kinase activation and gene expression programs. Because IL-7 signalling influences T cell survival, proliferation and differentiation, the receptor complex is a focal point in immunology, immuno-oncology and autoimmune disease research. This article synthesizes authoritative Gene Ontology data and published literature to describe the composition, assembly, regulation and disease relevance of the interleukin-7 receptor complex. It also outlines experimental strategies, including CRISPR-based models, that can be used to interrogate the function of this complex in health and disease.
interleukin-7 receptor complex At A Glance
| GO ID | GO:1905540 |
|---|---|
| GO term | interleukin-7 receptor complex |
| Ontology | cellular_component |
| Synonym | IL-7 receptor complex; IL-7-receptor complex; IL7 receptor complex; IL7-receptor complex |
| Major function | Binds interleukin-7 (IL-7) and initiates signalling through the alpha chain (IL7R) and common gamma chain (IL2RG), with optional kinase subunits. |
| Alpha chain | IL7R (CD127), binds IL-7 with high affinity. |
| Gamma chain | IL2RG (CD132), shared by multiple interleukin receptors. |
| Optional subunits | Additional kinase subunits such as JAK1 and JAK3 may associate with the complex. |
| Cellular location | Plasma membrane of responsive cells, including T cells and tumour cells. |
What Is GO:1905540?
GO:1905540 (interleukin-7 receptor complex) is a cellular component defined by the Gene Ontology as a protein complex that binds interleukin-7 (IL-7) and that consists of, at a minimum, an interleukin, an alpha chain and a gamma chain as well as optional additional kinase subunits. The alpha chain binds IL-7 with high affinity and subsequently binds the cytokine receptor common gamma chain that forms part of multiple interleukin receptors.
Why Is interleukin-7 receptor complex Important in Cell Biology?
The interleukin-7 receptor complex is essential for T cell development, survival and homeostasis, and its dysregulation contributes to autoimmune diseases, immunodeficiencies and cancer. Because the complex is a central node in cytokine signalling, it is a high-value target for understanding immune regulation and for developing therapeutic strategies that modulate IL-7 responses.
• Controls T cell survival and proliferation through IL-7-dependent signalling.
• Implicated in autoimmune diseases such as type 1 diabetes and coeliac disease.
• Expressed in human solid tumours, where it may support tumour cell growth.
• Shares the common gamma chain (IL2RG) with other interleukin receptors, linking IL-7 to broader cytokine networks.
• Serves as a target for immunotherapies aimed at modulating T cell responses.
• Provides a model system for studying receptor complex assembly and kinase recruitment.
• Relevant to allergy and asthma through related cytokine receptor complexes.
• Enables research on JAK-STAT signalling downstream of cytokine receptors.
• Offers opportunities for CRISPR-based functional genomics.
• Helps explain genetic associations between IL7RA polymorphisms and disease risk.
Structure and Composition of interleukin-7 receptor complex
IL-7 binding by the alpha chain (IL7R)
In simple terms: The alpha chain acts like a high-affinity catcher for IL-7.
The interleukin-7 receptor alpha chain (IL7R, also known as CD127) binds IL-7 with high affinity, forming the initial ligand-receptor interaction. This binding is the first step in assembly of the interleukin-7 receptor complex and is required for subsequent recruitment of the common gamma chain.
Recruitment of the common gamma chain (IL2RG)
In simple terms: After catching IL-7, the alpha chain calls in a shared partner called the common gamma chain.
Upon IL-7 binding, the alpha chain associates with the cytokine receptor common gamma chain (IL2RG, CD132), which is shared by multiple interleukin receptors. This heterodimerization is a hallmark of the interleukin-7 receptor complex and is essential for signal transduction.
Optional kinase subunits
In simple terms: Additional kinase proteins can join the complex to help send signals inside the cell.
The interleukin-7 receptor complex may include optional additional kinase subunits, such as Janus kinases (JAKs), which associate with the receptor chains and initiate downstream phosphorylation events. The presence of these subunits can vary depending on cell type and activation state.
Assembly and membrane localization
In simple terms: The complex assembles at the cell surface where it can receive IL-7 signals.
The interleukin-7 receptor complex is assembled at the plasma membrane of responsive cells, including T cells and certain tumour cells. Proper membrane localization and subunit stoichiometry are required for efficient ligand binding and signalling.
Key Genes Involved in GO:1905540 interleukin-7 receptor complex
The following genes encode proteins that are components of or closely associated with the interleukin-7 receptor complex (GO:1905540).
| Gene | Major Role | Research Relevance |
|---|---|---|
| IL7 | Ligand (interleukin-7) that binds the receptor complex | Key cytokine in T cell development and survival; studied in autoimmunity and cancer |
| IL7R | Alpha chain of the receptor complex; high-affinity IL-7 binding | Polymorphisms linked to type 1 diabetes and other autoimmune diseases |
| IL2RG | Common gamma chain shared by multiple interleukin receptors | Mutations cause severe combined immunodeficiency; central to cytokine signalling |
| JAK1 | Kinase subunit that associates with receptor chains | Mediates downstream phosphorylation; target in inflammatory diseases |
| JAK3 | Kinase subunit predominantly expressed in immune cells | Associates with common gamma chain; involved in IL-7 signalling |
| STAT5A | Transcription factor activated downstream of JAKs | Mediates IL-7-induced gene expression; studied in T cell biology |
| STAT5B | Transcription factor activated downstream of JAKs | Contributes to IL-7-dependent survival and proliferation |
| CD127 | Alternative name for IL7R alpha chain | Used as a marker for T cell subsets; target for functional studies |
| CD132 | Alternative name for common gamma chain | Shared subunit; mutations affect multiple cytokine pathways |
| TSLP | Cytokine related to IL-7; forms a distinct receptor complex | Studied in allergy and asthma; structural similarities to IL-7 receptor complex |
| IL2 | Cytokine that shares the common gamma chain | Comparative studies of receptor assembly |
| IL15 | Cytokine that shares the common gamma chain | Comparative studies of receptor assembly |
| IL4 | Cytokine that shares the common gamma chain | Comparative studies of receptor assembly |
| IL9 | Cytokine that shares the common gamma chain | Comparative studies of receptor assembly |
| IL21 | Cytokine that shares the common gamma chain | Comparative studies of receptor assembly |
| FOXP3 | Transcription factor in regulatory T cells | IL-7 signalling influences Treg development and function |
| CD4 | T cell co-receptor | Marker for T cell subsets responding to IL-7 |
| CD8 | T cell co-receptor | Marker for T cell subsets responding to IL-7 |
How Is interleukin-7 receptor complex Regulated?
The interleukin-7 receptor complex is regulated at multiple levels, including ligand availability, receptor expression and post-translational modifications. IL-7 binding induces conformational changes that enable recruitment of the common gamma chain and activation of associated JAK kinases, which phosphorylate STAT transcription factors. Receptor expression can be modulated by cytokines and transcription factors, and polymorphisms in IL7RA affect receptor function and disease risk. Additionally, the common gamma chain is shared with other cytokine receptors, creating competition and cross-regulation among signalling pathways.
interleukin-7 receptor complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| IL7R | Type 1 diabetes, autoimmune susceptibility | Knockout or point-mutation in T cell lines; primary T cells |
| IL7 | Coeliac disease, autoimmune tissue damage | Organoid models with IL-7 stimulation |
| IL2RG | Severe combined immunodeficiency | Knockout in hematopoietic stem cells; patient-derived cells |
| JAK3 | Immunodeficiency, autoimmune phenotypes | Point-mutation knock-in in immune cell lines |
| IL7R | Solid tumours | Overexpression in tumour cell lines; xenograft models |
Autoimmune diseases
The interleukin-7 receptor complex is implicated in autoimmune conditions such as type 1 diabetes and coeliac disease. IL7RA polymorphisms influence soluble IL-7 receptor levels and disease features in type 1 diabetes. In coeliac disease, IL-7 signalling promotes tissue damage and is a potential therapeutic target. Anti-CD3 immunotherapy in type 1 diabetes remodels T cell compartments, highlighting the role of IL-7 receptor signalling in T cell homeostasis.
Cancer
IL-7 and its receptor complex are expressed in human solid tumours, where they can support tumour cell proliferation and survival. The presence of the receptor complex in tumour cells suggests that IL-7 signalling may contribute to tumour progression, making it a candidate for targeted intervention.
Allergy and asthma
Although the interleukin-7 receptor complex is distinct from the TSLP receptor complex, structural and functional studies of related cytokine receptor complexes provide insights into allergy and asthma mechanisms. TSLP and IL-7 share the common gamma chain-like architecture, and understanding their assembly can inform therapeutic design.
From interleukin-7 receptor complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of IL7R abolish IL-7 signalling? | IL7R knockout cell lines (e.g., Jurkat, primary T cells) |
| Does a specific IL7RA polymorphism alter receptor function? | Point-mutation knock-in of the variant in a T cell line |
| Can a tagged IL7R be used to track complex assembly? | Knock-in of an epitope tag at the endogenous IL7R locus |
| Does overexpression of IL7R enhance IL-7 sensitivity? | IL7R overexpression in cytokine-dependent cell lines |
| Which kinase subunits associate with the complex? | Proteomic analysis of tagged receptor complexes |
| Does IL-7 signalling drive autoimmune tissue damage? | Intestinal organoid models with IL-7 treatment |
How to Study the interleukin-7 receptor complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Affinity purification-mass spectrometry | Protein interactions and complex composition | Identifying kinase subunits associated with IL-7 receptor complex |
| RNA sequencing | Changes in gene expression | Profiling transcriptional responses to IL-7 |
| Flow cytometry | Surface expression of receptor subunits | Quantifying IL7R and IL2RG on T cell subsets |
| Immunoblotting | Phosphorylation of JAK/STAT proteins | Assessing downstream signalling activation |
| CRISPR knockout | Loss-of-function effects | Testing requirement for IL7R or IL2RG in IL-7 responses |
| CRISPR point mutation | Allele-specific effects | Modeling IL7RA polymorphisms associated with disease |
| CRISPR knock-in | Tagged or reporter alleles | Tracking receptor complex localization and assembly |
| Overexpression | Gain-of-function effects | Enhancing IL-7 sensitivity in cell lines |
Proteomic analysis of receptor complexes
Affinity purification coupled with mass spectrometry can identify proteins that associate with the interleukin-7 receptor complex, including kinase subunits and adaptor proteins. This approach has been used to characterize receptor-associated protein complexes in IL-2- and IL-15-activated T cell lines, providing a template for studying IL-7 receptor assembly.
Transcriptomic profiling
RNA sequencing can measure changes in gene expression downstream of IL-7 receptor activation, revealing target genes involved in survival, proliferation and differentiation. Such profiling helps link receptor complex activity to cellular phenotypes in health and disease.
Flow cytometry and imaging
Flow cytometry can quantify surface expression of IL7R and IL2RG on T cell subsets, while imaging approaches can visualize receptor localization and internalization. These methods are useful for assessing how receptor complex levels change during immune responses.
Functional assays with CRISPR models
CRISPR knockout, point-mutation and knock-in models enable precise interrogation of the interleukin-7 receptor complex. For example, knocking out IL7R or IL2RG abolishes IL-7 signalling, while knock-in of disease-associated variants can reveal allele-specific effects.
How CRISPR Can Be Used to Study GO:1905540 interleukin-7 receptor complex
Knockout
CRISPR knockout of IL7R or IL2RG can completely abolish interleukin-7 receptor complex function, providing a clean background to test the requirement for IL-7 signalling in T cell survival and proliferation. Such models are valuable for validating receptor components identified by proteomics.
Point Mutation
Point mutations in IL7RA, such as those associated with type 1 diabetes, can be introduced using CRISPR to study allele-specific effects on receptor function and downstream signalling. These models help link genetic variants to molecular phenotypes.
Knock-in
Knock-in of epitope tags or fluorescent reporters at the endogenous IL7R or IL2RG loci allows real-time tracking of receptor complex assembly and trafficking without overexpression artifacts. This approach is useful for imaging and proteomic studies.
Overexpression
Overexpression of IL7R or IL2RG in cytokine-dependent cell lines can enhance IL-7 sensitivity and amplify downstream signals, facilitating biochemical analysis of the receptor complex. Overexpression models are also used to study the role of the receptor complex in tumour cells.
How EDITGENE Supports interleukin-7 receptor complex Research
Researchers studying interleukin-7 receptor complex-related genes often need to determine whether a candidate gene is causally involved in receptor assembly, signalling or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to generate precisely engineered cell models for such functional studies.
Contact EDITGENE today to design your custom CRISPR model for interleukin-7 receptor complex research.
Frequently Asked Questions About interleukin-7 receptor complex
What is the interleukin-7 receptor complex?
The interleukin-7 receptor complex (GO:1905540) is a protein complex that binds interleukin-7 (IL-7) and consists of at minimum an interleukin, an alpha chain and a gamma chain, with optional additional kinase subunits.
What genes are involved in the interleukin-7 receptor complex?
Key genes include IL7 (ligand), IL7R (alpha chain), IL2RG (common gamma chain), and associated kinases such as JAK1 and JAK3.
What is the function of GO:1905540?
GO:1905540 describes the cellular component that binds IL-7 and initiates signalling through the alpha and gamma chains, leading to downstream kinase activation.
How is the interleukin-7 receptor complex assembled?
The alpha chain (IL7R) binds IL-7 with high affinity and then recruits the common gamma chain (IL2RG), forming a heterodimer that can associate with kinase subunits.
What diseases are associated with the interleukin-7 receptor complex?
It is implicated in autoimmune diseases such as type 1 diabetes and coeliac disease, as well as in solid tumours.
How can CRISPR be used to study the interleukin-7 receptor complex?
CRISPR knockout, point mutation, knock-in and overexpression models allow precise manipulation of IL7R, IL2RG and associated genes to study receptor function.
What is the role of IL7RA polymorphisms in disease?
IL7RA polymorphisms can affect soluble IL-7 receptor levels and are associated with type 1 diabetes risk and clinical features.
Is the interleukin-7 receptor complex a therapeutic target?
Yes, modulating IL-7 signalling is being explored for autoimmune diseases and cancer, making the receptor complex a target of interest.
What methods are used to study the interleukin-7 receptor complex?
Common methods include affinity purification-mass spectrometry, RNA sequencing, flow cytometry, immunoblotting and CRISPR-based functional assays.
What is the difference between IL-7 receptor complex and TSLP receptor complex?
Both are cytokine receptor complexes, but they bind different ligands; the IL-7 receptor complex binds IL-7, while the TSLP receptor complex binds TSLP and is studied in allergy and asthma.
Conclusion
The interleukin-7 receptor complex (GO:1905540) is a critical cellular component that mediates IL-7 signalling through the alpha chain (IL7R) and common gamma chain (IL2RG), with optional kinase subunits. Its roles in T cell biology, autoimmunity and cancer make it a high-priority research target. Understanding its assembly, regulation and downstream effects requires integrated experimental approaches, including CRISPR-based models and proteomic profiling. Continued investigation of this complex will inform therapeutic strategies for immune-related diseases.
References
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- 3. Santos AJM et al.. 2024. A human autoimmune organoid model reveals IL-7 function in coeliac disease.. Nature 632(8024):401-410 PMID: 39048815
- 4. Al-Rawi MA et al.. 2003. Interleukin-7 (IL-7) and IL-7 receptor (IL-7R) signalling complex in human solid tumours.. Histol Histopathol 18(3):911-23 PMID: 12792903
- 5. Smolinska S et al.. 2023. Thymic Stromal Lymphopoietin (TSLP), Its Isoforms and the Interplay with the Epithelium in Allergy and Asthma.. Int J Mol Sci 24(16) PMID: 37628907
- 6. Long SA et al.. 2017. Remodeling T cell compartments during anti-CD3 immunotherapy of type 1 diabetes.. Cell Immunol 319:3-9 PMID: 28844471
- 7. Hoffmann M et al.. 2022. Interleukin-7 and soluble Interleukin-7 receptor levels in type 1 diabetes - Impact of IL7RA polymorphisms, HLA risk genotypes and clinical features.. Clin Immunol 235:108928 PMID: 35063672
- 8. Osinalde N et al.. 2017. Characterization of Receptor-Associated Protein Complex Assembly in Interleukin (IL)-2- and IL-15-Activated T-Cell Lines.. J Proteome Res 16(1):106-121 PMID: 27463037
