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Viral Membrane Channels: Role and Function in the Virus Life Cycle

Ching Wooen Sze1, Yee-Joo Tan2,3

  • 1Department of Microbiology, Yong Loo Lin School of Medicine, National University Health System (NUHS), National University of Singapore, MD4, Level 3, 5 Science Drive 2, Singapore 117597, Singapore. micscw@nus.edu.sg.

Viruses
|June 26, 2015
PubMed

Insights

Viroporins are viral proteins forming pores in host cells, crucial for viral replication and pathogenicity. Their ion channel activity disrupts cell homeostasis, aiding viral spread.

Area of Science:

  • Molecular and Cellular Biology
  • Virology
  • Biophysics

Background:

  • Viroporins are small, hydrophobic, trans-membrane viral proteins.
  • They oligomerize to form hydrophilic pores in host cell membranes.
  • These pores are vital for various stages of the viral life cycle.

Purpose of the Study:

  • To review recent functional investigations of viroporins.
  • To summarize the contributions of viroporins to viral replication and virulence.
  • To highlight the role of viroporin ion channel activity in cellular processes.

Main Methods:

  • Review of existing literature on viroporin function.
  • Analysis of studies investigating viroporin-mediated pore formation.
  • Examination of research on viroporin effects on host cell ion homeostasis.

Main Results:

  • Viroporins facilitate viral genome uncoating and release.
  • Their ion channel activity disrupts cellular ion homeostasis, particularly calcium levels.
  • Disrupted calcium homeostasis activates host defense pathways (e.g., programmed cell death, inflammasome) which are subverted by viruses.

Conclusions:

  • Viroporins are key determinants of viral pathogenicity and replication.
  • Understanding viroporin function offers insights into viral strategies for host manipulation.
  • Targeting viroporin activity presents a potential avenue for antiviral therapies.
Keywords:
cytopathic effectviral channelviroporin

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