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During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
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Update on enteroviral protease 2A: Structure, function, and host factor interaction.

Ying Liu1, Jichen Li1, Yong Zhang1

  • 1National Laboratory for Poliomyelitis, WHO WPRO Regional Polio Reference Laboratory, National Health Commission Key Laboratory for Biosafety, National Health Commission Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China.

Biosafety and Health
|March 13, 2025
PubMed
Summary
This summary is machine-generated.

Enteroviruses (EVs) use the 2A protease (2Apro) to disrupt host immunity and replicate. Studying 2Apro reveals new disease mechanisms and potential therapeutic targets for severe EV infections.

Keywords:
EnterovirusFunctionHost factor interactionProtease 2AStructure

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Area of Science:

  • Virology
  • Molecular Biology
  • Immunology

Background:

  • Enteroviruses (EVs) are common human pathogens causing mild to severe diseases.
  • The molecular basis of EV pathogenesis is not fully understood.
  • Enterovirus proteases, 2Apro and 3Cpro, are implicated in disease development.

Purpose of the Study:

  • To review the genetic and structural properties of enterovirus 2A protease (2Apro).
  • To discuss how 2Apro antagonizes host innate immune responses.
  • To explore novel 2Apro substrates and mechanisms in enterovirus-associated diseases.

Main Methods:

  • Review of existing literature on 2Apro.
  • Analysis of genetic and structural data of 2Apro.
  • Summary of methods for identifying 2Apro substrates.

Main Results:

  • 2Apro plays a critical role in viral polyprotein processing and host immune evasion.
  • 2Apro-mediated cleavage of host factors, like dystrophin, contributes to severe pathologies.
  • Novel substrates and mechanisms of 2Apro action are being uncovered.

Conclusions:

  • Understanding 2Apro's function is crucial for elucidating enterovirus pathogenesis.
  • Identifying 2Apro substrates can reveal new disease mechanisms.
  • Further research into 2Apro offers potential for therapeutic strategies against enterovirus infections.