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Cleavage of roquin and regnase-1 by the paracaspase MALT1 releases their cooperatively repressed targets to promote TH17 differentiation.
Nat. Immunol. 15, 1079-1089 (2014)
Humoral autoimmunity paralleled by the accumulation of follicular helper T cells (TFH cells) is linked to mutation of the gene encoding the RNA-binding protein roquin-1. Here we found that T cells lacking roquin caused pathology in the lung and accumulated as cells of the TH17 subset of helper T cells in the lungs. Roquin inhibited TH17 cell differentiation and acted together with the endoribonuclease regnase-1 to repress target mRNA encoding the TH17 cell-promoting factors IL-6, ICOS, c-Rel, IRF4, IκBNS and IκBζ. This cooperation required binding of RNA by roquin and the nuclease activity of regnase-1. Upon recognition of antigen by the T cell antigen receptor (TCR), roquin and regnase-1 proteins were cleaved by the paracaspase MALT1. Thus, this pathway acts as a 'rheostat' by translating TCR signal strength via graded inactivation of post-transcriptional repressors and differential derepression of targets to enhance TH17 differentiation.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Nf-kappa-b; Messenger-rna Decay; Helper T-cells; Transcription Factor; Pharmacological Inhibition; Protease Activity; Protects Mice; T-h-17 Cells; Activation; Autoimmunity
ISSN (print) / ISBN
1529-2908
e-ISSN
1529-2916
Journal
Nature Immunology
Quellenangaben
Volume: 15,
Issue: 11,
Pages: 1079-1089
Publisher
Nature Publishing Group
Publishing Place
New York
Reviewing status
Peer reviewed
Institute(s)
Institute of Molecular Immunology (IMI)
Institute of Virology (VIRO)
Research Unit Signaling and Translation (SAT)
Institute of Molecular Toxicology and Pharmacology (TOX)
Institute of Structural Biology (STB)
Institute of Virology (VIRO)
Research Unit Signaling and Translation (SAT)
Institute of Molecular Toxicology and Pharmacology (TOX)
Institute of Structural Biology (STB)