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Basic information
| Entry | Database: PDB / ID: 8ent | |||||||||
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| Title | Interleukin-21 signaling complex with IL-21R and IL-2Rg | |||||||||
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Keywords | CYTOKINE/CYTOKINE RECEPTOR / IL-21 / receptor / complex / signaling / CYTOKINE / CYTOKINE-CYTOKINE RECEPTOR complex | |||||||||
| Function / homology | Function and homology informationinterleukin-21 receptor activity / mature B cell differentiation / interleukin-15 receptor activity / interleukin-2 binding / positive regulation of natural killer cell differentiation / CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation / positive regulation of natural killer cell cytokine production / interleukin-2 receptor binding / tyrosine phosphorylation of STAT protein / germinal center B cell differentiation ...interleukin-21 receptor activity / mature B cell differentiation / interleukin-15 receptor activity / interleukin-2 binding / positive regulation of natural killer cell differentiation / CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation / positive regulation of natural killer cell cytokine production / interleukin-2 receptor binding / tyrosine phosphorylation of STAT protein / germinal center B cell differentiation / positive regulation of tissue remodeling / positive regulation of T cell differentiation in thymus / lymphocyte differentiation / natural killer cell differentiation / Interleukin-9 signaling / Interleukin-21 signaling / interleukin-7-mediated signaling pathway / interleukin-9-mediated signaling pathway / interleukin-4-mediated signaling pathway / positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation / interleukin-2-mediated signaling pathway / positive regulation of natural killer cell mediated cytotoxicity / cytokine receptor binding / T follicular helper cell differentiation / interleukin-15-mediated signaling pathway / cellular homeostasis / STAT3 nuclear events downstream of ALK signaling / Interleukin-15 signaling / cytokine receptor activity / Interleukin-2 signaling / natural killer cell activation / positive regulation of tyrosine phosphorylation of STAT protein / positive regulation of B cell differentiation / positive regulation of immunoglobulin production / natural killer cell mediated cytotoxicity / cytokine binding / positive regulation of interleukin-17 production / positive regulation of interleukin-10 production / Interleukin receptor SHC signaling / coreceptor activity / cell maturation / positive regulation of B cell proliferation / positive regulation of T cell proliferation / Interleukin-7 signaling / positive regulation of phagocytosis / positive regulation of cytokine production / cytokine activity / cellular response to virus / positive regulation of type II interferon production / cytokine-mediated signaling pathway / positive regulation of inflammatory response / transmembrane signaling receptor activity / T cell differentiation in thymus / RAF/MAP kinase cascade / Interleukin-4 and Interleukin-13 signaling / defense response to virus / gene expression / receptor complex / endosome / immune response / external side of plasma membrane / positive regulation of cell population proliferation / cell surface / signal transduction / extracellular space / extracellular region / nucleoplasm / membrane / plasma membrane / cytosol Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.83 Å | |||||||||
Authors | Abhiraman, G.C. / Jude, K.M. / Garcia, K.C. | |||||||||
| Funding support | United States, 2items
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Citation | Journal: Cell Rep / Year: 2023Title: A structural blueprint for interleukin-21 signal modulation. Authors: Gita C Abhiraman / Theodora U J Bruun / Nathanael A Caveney / Leon L Su / Robert A Saxton / Qian Yin / Shaogeng Tang / Mark M Davis / Kevin M Jude / K Christopher Garcia / ![]() Abstract: Interleukin-21 (IL-21) plays a critical role in generating immunological memory by promoting the germinal center reaction, yet clinical use of IL-21 remains challenging because of its pleiotropy and ...Interleukin-21 (IL-21) plays a critical role in generating immunological memory by promoting the germinal center reaction, yet clinical use of IL-21 remains challenging because of its pleiotropy and association with autoimmune disease. To better understand the structural basis of IL-21 signaling, we determine the structure of the IL-21-IL-21R-γc ternary signaling complex by X-ray crystallography and a structure of a dimer of trimeric complexes using cryo-electron microscopy. Guided by the structure, we design analogs of IL-21 by introducing substitutions to the IL-21-γc interface. These IL-21 analogs act as partial agonists that modulate downstream activation of pS6, pSTAT3, and pSTAT1. These analogs exhibit differential activity on T and B cell subsets and modulate antibody production in human tonsil organoids. These results clarify the structural basis of IL-21 signaling and offer a potential strategy for tunable manipulation of humoral immunity. | |||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8ent.cif.gz | 499.4 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb8ent.ent.gz | 328.3 KB | Display | PDB format |
| PDBx/mmJSON format | 8ent.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 8ent_validation.pdf.gz | 1.7 MB | Display | wwPDB validaton report |
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| Full document | 8ent_full_validation.pdf.gz | 1.7 MB | Display | |
| Data in XML | 8ent_validation.xml.gz | 66.9 KB | Display | |
| Data in CIF | 8ent_validation.cif.gz | 89.6 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/en/8ent ftp://data.pdbj.org/pub/pdb/validation_reports/en/8ent | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 2b5iS ![]() 3tgxS C: citing same article ( S: Starting model for refinement |
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| Similar structure data | Similarity search - Function & homology F&H Search |
| Experimental dataset #1 | Data reference: 10.15785/SBGRID/974 / Data set type: diffraction image data / Metadata reference: 10.15785/SBGRID/974 |
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Assembly
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| Noncrystallographic symmetry (NCS) | NCS domain:
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About Yorodumi




Homo sapiens (human)
X-RAY DIFFRACTION
United States, 2items
Citation


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