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CSK promotes innate immune response to DNA virus by phosphorylating MITA.

Peng Gao, Ming-Ming Hu, Hong-Bing Shu

Biochemical and biophysical research communications 2020 May 21


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    Upon detection of viral DNA, the cytoplasmic DNA sensor cyclic GMP-AMP (cGAMP) synthase (cGAS) utilizes GTP and ATP as substrates to synthesize the second messenger molecule 2'3'cyclic GMP-AMP (cGAMP), which binds to the ER-associated adaptor protein MITA/STING to signal innate antiviral response to DNA virus. How the cGAS-MITA pathways are post-translationally regulated is not fully understood. In this study, we identified the tyrosine kinase CSK as a positive regulator of cGAS-MITA mediated innate antiviral response. CSK-deficiency inhibits DNA virus-triggered induction of downstream antiviral effector genes. Following DNA virus infection, CSK phosphorylates MITA at Y240 and Y245, which is important for its activation. These results suggest that CSK plays a role in modulating innate immune response to DNA virus. Copyright © 2020 Elsevier Inc. All rights reserved.

    Citation

    Peng Gao, Ming-Ming Hu, Hong-Bing Shu. CSK promotes innate immune response to DNA virus by phosphorylating MITA. Biochemical and biophysical research communications. 2020 May 21;526(1):199-205

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    PMID: 32201077

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    • Copyright © 2021 Illumina Inc. All rights reserved.