GO:0032002 interleukin-28 receptor complex: Components, Assembly and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032002 (interleukin-28 receptor complex) is a heteromeric cell-surface receptor complex that binds the type III interferons interleukin-28 (IFNL2, IFNL3) and interleukin-29 (IFNL1).
• The complex is composed of an alpha subunit (IFNLR1/IL28Ralpha) and a beta subunit (IL10RB), which together form the functional receptor for type III interferon signaling.
• Type III interferon signaling through this receptor triggers JAK-STAT activation and induces interferon-stimulated genes, contributing to antiviral defense.
• In the central nervous system, Toll-like receptor 3 activation induces interferon-lambda expression in human neuronal cells, highlighting a role for this receptor complex in neuroimmune responses.
• The interleukin-28 receptor complex is implicated in neuropsychiatric conditions such as interferon-induced depression, where glucocorticoid receptor, BDNF, serotonin and dopamine neurotransmission are affected.
• Astrocyte-mediated inhibition of herpes simplex virus type 1 involves interferon-gamma induction downstream of TLR3, providing context for interferon-related antiviral mechanisms in the CNS.
Description
The interleukin-28 receptor complex (GO:0032002) is a cell-surface protein complex that specifically binds interleukin-28 (IFNL2 or IFNL3) and interleukin-29 (IFNL1), also known as type III interferons. This receptor complex is a key mediator of innate antiviral immunity and is expressed in various tissues, including neuronal cells and astrocytes. Understanding its composition and signaling is essential for researchers studying interferon biology, neuroinflammation, and viral pathogenesis. The complex is formed by two subunits: an alpha receptor subunit (IFNLR1/IL28Ralpha) and a beta receptor subunit (IL10RB). Upon ligand binding, the receptor complex activates downstream signaling cascades, notably the JAK-STAT pathway, leading to the induction of interferon-stimulated genes. This signaling is critical for host defense against viral infections and for modulating immune responses in the central nervous system. In human neuronal cells, Toll-like receptor 3 activation induces interferon-lambda expression, which can then act through the interleukin-28 receptor complex in an autocrine or paracrine manner. This highlights the receptor's role in neuroimmune crosstalk. Furthermore, interferon-induced depression has been associated with alterations in glucocorticoid receptors, BDNF, serotonin and dopamine neurotransmission, suggesting that type III interferon signaling may influence neuropsychiatric states. Astrocytes also participate in antiviral responses, where TLR3-mediated interferon-gamma induction inhibits herpes simplex virus type 1, providing a broader context for interferon actions in the brain. Thus, the interleukin-28 receptor complex is a focal point for understanding how type III interferons orchestrate antiviral and immunomodulatory effects.
interleukin-28 receptor complex At A Glance
| GO ID | GO:0032002 |
|---|---|
| GO term | interleukin-28 receptor complex |
| Ontology | cellular_component |
| Synonym | IL-28 receptor complex |
| Major function | Binds interleukin-28 (IFNL2, IFNL3) and interleukin-29 (IFNL1) to initiate type III interferon signaling |
| Subunits | Alpha subunit (IFNLR1/IL28Ralpha) and beta subunit (IL10RB) |
| Ligands | Interleukin-28 (IFNL2 or IFNL3) and interleukin-29 (IFNL1) |
| Signaling pathway | JAK-STAT pathway leading to interferon-stimulated gene expression |
| Tissue expression | Neuronal cells, astrocytes, and other cell types |
What Is GO:0032002?
The interleukin-28 receptor complex (GO:0032002) is defined as a protein complex that binds interleukin-28 and interleukin-29. It is composed of an alpha and a beta receptor subunit (in human IFNLR1/IL28Ralpha and IL10RB) and either interleukin-28 (IFNL2 or IFNL3) or interleukin-29 (IFNL1). This definition captures the heteromeric nature of the receptor and its ligand specificity for type III interferons.
Why Is interleukin-28 receptor complex Important in Cell Biology?
The interleukin-28 receptor complex is important because it mediates the biological effects of type III interferons, which are critical for antiviral defense, immune modulation, and neuroimmune interactions. Dysregulation of this receptor complex has been linked to neuropsychiatric conditions such as interferon-induced depression, where changes in glucocorticoid receptor signaling, BDNF, serotonin and dopamine neurotransmission are observed. Understanding this receptor complex can inform therapeutic strategies for viral infections and interferon-related mood disorders.
• Mediates antiviral responses through type III interferon signaling.
• Expressed in neuronal cells and astrocytes, contributing to neuroimmune responses.
• Involved in Toll-like receptor 3-mediated interferon-lambda induction in human neuronal cells.
• Linked to interferon-induced depression and neuropsychiatric symptoms.
• Provides a target for understanding JAK-STAT signaling in the central nervous system.
• Relevant for studying host-pathogen interactions, particularly herpes simplex virus type 1 inhibition in astrocytes.
• Potential biomarker or therapeutic target for interferon-related disorders.
• Key to elucidating type III interferon-specific effects distinct from type I interferons.
What Happens During interleukin-28 receptor complex?
Ligand Binding and Receptor Activation
In simple terms: The receptor complex grabs onto specific interferon molecules, which turns it on.
The interleukin-28 receptor complex binds interleukin-28 (IFNL2 or IFNL3) or interleukin-29 (IFNL1) with high specificity. This binding induces conformational changes in the receptor subunits, IFNLR1 and IL10RB, leading to activation of associated JAK kinases.
JAK-STAT Signaling Cascade
In simple terms: Activation of the receptor triggers a chain of signals inside the cell that turns on antiviral genes.
Upon ligand binding, JAK kinases phosphorylate STAT transcription factors, which then translocate to the nucleus and induce interferon-stimulated genes. This signaling cascade is central to the antiviral and immunomodulatory effects of type III interferons.
Induction of Interferon-Stimulated Genes
In simple terms: The signal causes the cell to produce proteins that fight viruses.
Activation of the interleukin-28 receptor complex leads to the expression of interferon-stimulated genes, which establish an antiviral state in the cell. In human neuronal cells, this pathway can be triggered by Toll-like receptor 3 activation, resulting in interferon-lambda expression.
Neuroimmune Modulation
In simple terms: In the brain, this receptor helps control immune responses and can affect mood.
The interleukin-28 receptor complex is expressed in neuronal cells and astrocytes, where it modulates neuroimmune responses. Interferon-induced depression has been associated with alterations in glucocorticoid receptors, BDNF, serotonin and dopamine neurotransmission, suggesting that type III interferon signaling through this receptor may influence neuropsychiatric states.
Key Genes Involved in GO:0032002 interleukin-28 receptor complex
The following genes encode the subunits and ligands of the interleukin-28 receptor complex, as well as related signaling molecules.
| Gene | Major Role | Research Relevance |
|---|---|---|
| IFNLR1 | Alpha subunit of the interleukin-28 receptor complex (IL28Ralpha) | Essential for ligand binding and receptor assembly; target for knockout studies |
| IL10RB | Beta subunit of the interleukin-28 receptor complex | Required for signaling; mutations affect receptor function |
| IFNL1 | Interleukin-29 ligand | Binds and activates the receptor complex |
| IFNL2 | Interleukin-28A ligand | Binds and activates the receptor complex |
| IFNL3 | Interleukin-28B ligand | Binds and activates the receptor complex |
| JAK1 | Janus kinase 1 | Mediates downstream phosphorylation of STATs |
| JAK2 | Janus kinase 2 | May contribute to signaling |
| TYK2 | Tyrosine kinase 2 | Associated with JAK-STAT pathway |
| STAT1 | Signal transducer and activator of transcription 1 | Transcription factor activated by receptor signaling |
| STAT2 | Signal transducer and activator of transcription 2 | Forms heterodimer with STAT1 |
| IRF9 | Interferon regulatory factor 9 | Part of ISGF3 complex |
| TLR3 | Toll-like receptor 3 | Induces interferon-lambda expression in neuronal cells |
| BDNF | Brain-derived neurotrophic factor | Linked to interferon-induced depression |
| HTR1A | Serotonin receptor 1A | Neurotransmission affected in interferon-induced depression |
| DRD2 | Dopamine receptor D2 | Neurotransmission affected in interferon-induced depression |
| NR3C1 | Glucocorticoid receptor | Associated with interferon-induced depression |
| IFNG | Interferon gamma | Induced by TLR3 in astrocytes, inhibits HSV-1 |
How Is interleukin-28 receptor complex Regulated?
The interleukin-28 receptor complex is regulated at multiple levels. Ligand availability is controlled by the expression of IFNL1, IFNL2, and IFNL3, which can be induced by Toll-like receptor 3 activation in human neuronal cells. Receptor expression levels of IFNLR1 and IL10RB may also be modulated by cellular context. Downstream signaling is regulated by JAK-STAT pathway components, including suppressors of cytokine signaling (SOCS) proteins, although specific studies on this receptor complex are limited. Additionally, glucocorticoid receptor signaling and neurotransmitter systems such as serotonin and dopamine have been implicated in modulating the effects of interferon-induced depression, suggesting complex regulatory interactions.
interleukin-28 receptor complex and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| IFNLR1 | Antiviral defense, neuroimmune modulation | Knockout cell lines to study receptor function |
| IL10RB | Inflammatory bowel disease, antiviral responses | Point mutation models to assess signaling |
| IFNL3 | Hepatitis C virus clearance, interferon therapy response | Knock-in of risk variants |
| NR3C1 | Interferon-induced depression | Overexpression or knockout in neuronal cells |
| BDNF | Depression, neuroplasticity | Knockdown or overexpression models |
Interferon-Induced Depression
Interferon-induced depression is a significant neuropsychiatric side effect of interferon therapy. Studies have associated this condition with alterations in glucocorticoid receptors, brain-derived neurotrophic factor, serotonin and dopamine neurotransmission. The interleukin-28 receptor complex, by mediating type III interferon signaling, may contribute to these neuropsychiatric effects, although direct evidence is still emerging.
Viral Infections and Neuroimmunity
The interleukin-28 receptor complex plays a role in antiviral defense in the central nervous system. In human neuronal cells, Toll-like receptor 3 activation induces interferon-lambda expression, which can act through this receptor to establish an antiviral state. In astrocytes, TLR3-mediated interferon-gamma induction inhibits herpes simplex virus type 1, highlighting the importance of interferon signaling in controlling neurotropic viral infections.
From interleukin-28 receptor complex-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does IFNLR1 knockout abolish type III interferon signaling? | IFNLR1 knockout cell line |
| How do point mutations in IL10RB affect receptor assembly? | IL10RB point mutation knock-in |
| Can tagged IFNLR1 be used to track receptor localization? | Tagged knock-in of IFNLR1 |
| What is the effect of IFNL3 overexpression on antiviral gene expression? | IFNL3 overexpression cell line |
| Does CRISPR activation of IFNLR1 enhance antiviral responses? | CRISPR activation (CRISPRa) model |
| How does IL10RB knockout affect neuroimmune signaling? | IL10RB knockout in neuronal cells |
How to Study the interleukin-28 receptor complex Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Gene expression changes | Identifying interferon-stimulated genes |
| Proteomics | Protein interactions and abundance | Mapping receptor complex components |
| Immunoprecipitation | Protein-protein interactions | Detecting subunit association |
| Fluorescence microscopy | Subcellular localization | Tracking receptor trafficking |
| CRISPR knockout | Loss-of-function effects | Determining receptor necessity |
| CRISPR knock-in | Tagged or mutant receptor expression | Studying receptor dynamics |
| Antiviral assay | Viral replication inhibition | Assessing functional antiviral activity |
Transcriptomic Analysis (RNA-seq)
RNA sequencing can measure the expression of interferon-stimulated genes following activation of the interleukin-28 receptor complex. This method is useful for identifying downstream targets and comparing responses between wild-type and knockout cells.
Proteomic Profiling
Mass spectrometry-based proteomics can identify proteins associated with the interleukin-28 receptor complex, including subunits and signaling intermediates. This approach helps elucidate the composition and dynamics of the receptor complex.
Imaging and Localization Studies
Fluorescence microscopy with tagged receptor subunits can visualize the localization and trafficking of the interleukin-28 receptor complex in live cells. This is particularly useful in neuronal cells where the receptor may have specialized functions.
Functional Assays for Antiviral Activity
Antiviral assays using viral infection models can assess the functional consequences of receptor activation or knockout. For example, herpes simplex virus type 1 inhibition in astrocytes can be measured to evaluate interferon-mediated antiviral effects.
How CRISPR Can Be Used to Study GO:0032002 interleukin-28 receptor complex
Knockout
CRISPR knockout of IFNLR1 or IL10RB can abolish interleukin-28 receptor complex function, allowing researchers to study the specific contributions of this receptor to antiviral and neuroimmune responses. Knockout cell lines are valuable for identifying downstream signaling pathways and interferon-stimulated genes.
Point Mutation
Introducing point mutations in IFNLR1 or IL10RB via CRISPR can model naturally occurring variants or disrupt specific interaction domains. This helps dissect the molecular determinants of ligand binding and receptor activation.
Knock-in
CRISPR knock-in can be used to add epitope tags or fluorescent proteins to IFNLR1 or IL10RB, enabling real-time tracking of the receptor complex. This approach is useful for studying receptor trafficking and localization in neuronal cells.
Overexpression
CRISPR activation (CRISPRa) or traditional overexpression can increase the levels of IFNLR1, IL10RB, or their ligands, enhancing signaling through the interleukin-28 receptor complex. This is useful for studying gain-of-function effects and for amplifying antiviral responses.
How EDITGENE Supports interleukin-28 receptor complex Research
Researchers studying interleukin-28 receptor complex-related genes often need to determine whether a candidate gene is causally involved in receptor function, signaling, or disease. EDITGENE provides a comprehensive suite of CRISPR-based services to enable precise genetic modifications in relevant cell models.
Contact EDITGENE today to design your custom CRISPR model for interleukin-28 receptor complex research.
Frequently Asked Questions About interleukin-28 receptor complex
What is the interleukin-28 receptor complex?
The interleukin-28 receptor complex (GO:0032002) is a protein complex that binds interleukin-28 and interleukin-29, composed of IFNLR1 and IL10RB subunits.
What genes are involved in the interleukin-28 receptor complex?
Key genes include IFNLR1 (alpha subunit), IL10RB (beta subunit), and the ligands IFNL1, IFNL2, and IFNL3.
What is the function of GO:0032002?
GO:0032002 mediates signaling by type III interferons, leading to antiviral and immunomodulatory responses.
Which diseases are associated with the interleukin-28 receptor complex?
It has been linked to interferon-induced depression and antiviral defense in the central nervous system.
How is the interleukin-28 receptor complex activated?
It is activated by binding of interleukin-28 or interleukin-29, which triggers JAK-STAT signaling.
What cell types express the interleukin-28 receptor complex?
It is expressed in neuronal cells, astrocytes, and other cell types.
What is the role of IFNLR1 in the receptor complex?
IFNLR1 is the alpha subunit that binds ligands and is essential for receptor assembly and signaling.
How can CRISPR be used to study the interleukin-28 receptor complex?
CRISPR knockout, knock-in, point mutation, and overexpression can be used to dissect receptor function and signaling.
What is interferon-induced depression?
It is a neuropsychiatric side effect of interferon therapy associated with changes in glucocorticoid receptors, BDNF, serotonin and dopamine neurotransmission.
How does Toll-like receptor 3 relate to the interleukin-28 receptor complex?
TLR3 activation induces interferon-lambda expression in human neuronal cells, which can then signal through the interleukin-28 receptor complex.
Conclusion
The interleukin-28 receptor complex (GO:0032002) is a critical mediator of type III interferon signaling, with important roles in antiviral defense and neuroimmune modulation. Its involvement in interferon-induced depression highlights its clinical relevance. Continued research using CRISPR-based models will further elucidate its mechanisms and therapeutic potential.
References
- 1. Zhou L et al.. 2009. Activation of toll-like receptor-3 induces interferon-lambda expression in human neuronal cells.. Neuroscience 159(2):629-37 PMID: 19166911
- 2. Udina M et al.. 2016. Glucocorticoid Receptors, Brain-Derived Neurotrophic Factor, Serotonin and Dopamine Neurotransmission are Associated with Interferon-Induced Depression.. Int J Neuropsychopharmacol 19(4) PMID: 26721949
- 3. Li J et al.. 2012. Induction of interferon-γ contributes to Toll-like receptor 3-mediated herpes simplex virus type 1 inhibition in astrocytes.. J Neurosci Res 90(2):399-406 PMID: 22057682
