Scientific article
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English

Vaccinia virus subverts xenophagy through phosphorylation and nuclear targeting of p62

Published inThe Journal of cell biology, vol. 223, no. 6, e202104129
Publication date2024-06-03
First online date2024-05-06
Abstract

Autophagy is an essential degradation program required for cell homeostasis. Among its functions is the engulfment and destruction of cytosolic pathogens, termed xenophagy. Not surprisingly, many pathogens use various strategies to circumvent or co-opt autophagic degradation. For poxviruses, it is known that infection activates autophagy, which however is not required for successful replication. Even though these complex viruses replicate exclusively in the cytoplasm, autophagy-mediated control of poxvirus infection has not been extensively explored. Using the prototypic poxvirus, vaccinia virus (VACV), we show that overexpression of the xenophagy receptors p62, NDP52, and Tax1Bp1 restricts poxvirus infection. While NDP52 and Tax1Bp1 were degraded, p62 initially targeted cytoplasmic virions before being shunted to the nucleus. Nuclear translocation of p62 was dependent upon p62 NLS2 and correlated with VACV kinase mediated phosphorylation of p62 T269/S272. This suggests that VACV targets p62 during the early stages of infection to avoid destruction and further implies that poxviruses exhibit multi-layered control of autophagy to facilitate cytoplasmic replication.

Keywords
  • Active Transport, Cell Nucleus
  • Autophagy
  • Cell Nucleus / metabolism
  • Cell Nucleus / virology
  • HEK293 Cells
  • HeLa Cells
  • Humans
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism
  • Phosphorylation
  • Sequestosome-1 Protein / genetics
  • Sequestosome-1 Protein / metabolism
  • Vaccinia / genetics
  • Vaccinia / metabolism
  • Vaccinia / virology
  • Vaccinia virus / genetics
  • Vaccinia virus / metabolism
  • Virus Replication
UNIGE affiliation entities Not a UNIGE publication
Funding
  • University College London [MC_UU_00012/7]
  • European Research Council [649101-UbiProPox]
  • Wellcome Trust [217202/Z/19/Z]
  • Parkinson's UK [K-2201]
Citation (ISO format)
KRAUSE, Melanie et al. Vaccinia virus subverts xenophagy through phosphorylation and nuclear targeting of p62. In: The Journal of cell biology, 2024, vol. 223, n° 6, p. e202104129. doi: 10.1083/jcb.202104129
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Article (Published version)
Identifiers
Journal ISSN0021-9525
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