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Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
08:32

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Published on: March 2, 2014

The human cytomegalovirus glycoprotein UL16 traffics through the plasma membrane and the nuclear envelope

Mar Valés-Gómez1, Adam Winterhalter, Pedro Roda-Navarro

  • 1Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK. mv231@mole.bio.cam.ac.uk

Cellular Microbiology
|March 22, 2006
PubMed

Insights

Human cytomegalovirus (HCMV) UL16 protein impacts immune evasion by retaining MICB in the trans-Golgi network. This study reveals UL16

Area of Science:

  • Virology
  • Immunology
  • Cell Biology

Background:

  • Human cytomegalovirus (HCMV) employs immune evasion strategies.
  • The UL16 glycoprotein is known to interfere with host immune responses.
  • UL16 interacts with MICB and ULBPs, ligands for the NKG2D receptor on immune cells.

Purpose of the Study:

  • To investigate the intracellular localization and maturation of HCMV UL16 and MICB.
  • To elucidate the mechanism of UL16-mediated MICB downmodulation.

Main Methods:

  • Studied intracellular localization of UL16 and MICB in HCMV-infected cells.
  • Utilized transfectant systems to analyze protein trafficking.
  • Examined protein maturation and localization through the secretory pathway.

Main Results:

  • UL16 protein was observed to traffic through the ER, TGN, and plasma membrane, followed by internalization.
  • UL16 was uniquely detected within the inner nuclear membrane.
  • MICB was localized in the TGN in HCMV-infected cells, suggesting altered trafficking post-ER transit.

Conclusions:

  • HCMV UL16 protein exhibits complex intracellular trafficking, including localization to the inner nuclear membrane.
  • UL16 influences MICB localization within the TGN, potentially impacting NKG2D-mediated immune surveillance.
  • These findings provide insights into HCMV immune evasion mechanisms at the cellular level.

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