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When STING Meets Viruses: Sensing, Trafficking and Response.

Zhaohe Li1, Siqi Cai1, Yutong Sun1

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|November 2, 2020
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Host cells use DNA sensing to trigger innate immune responses against pathogens. The cGAS-STING pathway, crucial for detecting DNA, activates antiviral defenses and interferon production.

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DNA virusesSTINGcellular traffickingimmune responsespost translational modifications

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cellular Biology

Background:

  • Host cells possess innate immune responses to combat microbial pathogens, involving interferons (IFNs) and IFN-stimulated genes (ISGs).
  • The DNA sensor cyclic GMP-AMP synthase (cGAS) detects cytoplasmic DNA and synthesizes 2',3'-cGAMP, which activates Stimulator of Interferon Genes (STING).
  • STING is essential for sensing DNA during pathogen invasion, initiating cellular defense mechanisms.

Purpose of the Study:

  • To review recent advancements in the regulation of STING activation.
  • To explore the dynamic aspects of STING's intracellular trafficking.
  • To summarize the post-translational modifications (PTMs) of STING by host and microbial proteins.

Main Methods:

  • Literature review of recent studies on STING pathway.
  • Analysis of research on STING activation dynamics.
  • Examination of studies on STING trafficking and PTMs.

Main Results:

  • STING activation involves conformational changes and cellular trafficking.
  • STING's function is modulated by various host and microbial proteins.
  • Post-translational modifications significantly impact STING activity and localization.

Conclusions:

  • STING is a central regulator of the innate immune response to DNA.
  • Dynamic regulation of STING, including its trafficking and PTMs, is critical for effective antiviral defense.
  • Understanding these regulatory mechanisms offers insights into host-pathogen interactions.