Spatial proteomics identifies a novel CRTC-dependent viral sensing pathway that stimulates production of Interleukin-11
Ravenhill, B. J.; Oliveira, M.; Wood, G.; Di, Y.; Davies, C.; Lu, Y.; Antrobus, R.; Elliott, G.; Irigoyen, N.; Hughes, D. J.; Lyons, P.; Chung, B. Y.; Borner, G.; Weekes, M. P.
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Appropriate cellular recognition of viruses is essential for the generation of effective innate and adaptive antiviral immunity. Viral sensors and their signalling components thus provide a crucial first line of host defence. Many exhibit subcellular relocalisation upon activation, triggering expression of interferon and antiviral genes. To identify novel signalling factors we analysed protein relocalisation on a global scale during viral infection. CREB Regulated Transcription Coactivators-2 and 3 (CRTC2/3) exhibited early cytoplasmic-to-nuclear translocation upon a diversity of viral stimuli, in diverse cell types. This movement was depended on Mitochondrial Antiviral Signalling Protein (MAVS), cyclo-oxygenase proteins and protein kinase A. We identify a key effect of transcription stimulated by CRTC2/3 translocation as production of the pro-fibrogenic cytokine interleukin-11. This may be important clinically in viral infections associated with fibrosis, including SARS-CoV-2.
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