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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sommer, Jan Garbers, Christoph Waetzig, Georg H. Hölscher, Christoph Aparicio-siegmund, Samadhi Lorenzen, Inken Scheller, Jürgen Rose-john, Stefan Spudy, Björn Grötzinger, Joachim |
| Description | Author Affiliation: Garbers C ( Institute of Biochemistry and Molecular Biology II, Medical Faculty, Heinrich-Heine University, 40225 Düsseldorf, Germany.) |
| Abstract | IL-27 consists of the cytokine subunit p28 and the non-signaling -receptor EBI3. p28 was shown to additionally act via the non-signaling membrane-bound IL-6 -receptor (IL-6R) as an agonistic cytokine but also as a gp130 ß-receptor antagonist, leading to inhibition of IL-6 signaling. Here, we developed a strategy for bacterial expression, purification, and refolding of murine p28. We show that p28 did not interfere with IL-6- or IL-27-induced signaling, indicating that p28 has no antagonistic properties. Moreover, we demonstrate that murine p28 acts as an agonistic cytokine via the murine and human IL-6R, indicating that p28 exhibits no species specificity. p28 was able to induce p28-trans-signaling via the soluble IL-6R (sIL-6R), a characteristic property that was initially described for trans-signaling of IL-6 via the sIL-6R. Of notice, p28/sIL-6R trans-signaling was inhibited by the IL-6 trans-signaling antagonist, soluble gp130. At higher concentrations, p28 but not IL-6 was able to induce signaling even in the absence of IL-6R or EBI3. Although IL-27 signals via a heterodimer of the ß-receptor chains gp130 and Wsx-1, p28/IL-6R specifically recruits two gp130 ß-receptor chains for signal transduction. The binding of p28 to a gp130/Wsx-1 heterodimer or a gp130 homodimer is highly selective and controlled by a novel molecular switch induced by EBI3 or IL-6R, respectively. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 6 |
| Volume Number | 288 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2013-02-08 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cytokine Receptor Gp130 Metabolism Interleukins Protein Multimerization Physiology Signal Transduction Animals COS Cells Cercopithecus Aethiops Genetics Mice NIH 3T3 Cells Receptors, Cytokine Receptors, Interleukin Research Support, Non-U.S. Gov't Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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