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Target intelligence / Profile preview
Polymerase Basic Protein 2 Subunit (PB2)
- Target
- PB2
- Molecular classification
- Viral protein, RNA-dependent RNA polymerase subunit
01
Overview
PB2 is a subunit of the RNA-dependent RNA polymerase complex of influenza A virus. It is critical for transcription initiation by binding to the 5' cap structures of host pre-mRNAs, a process called "cap-snatching." PB2 also influences host adaptation, pathogenicity, and evasion of the innate immune response.
02
Mechanism of action
PB2 is a subunit of the RNA-dependent RNA polymerase, which is essential for viral transcription and replication. Inhibiting its cap-binding or polymerase activity would disrupt the viral lifecycle.
03
Biological functions
Transcription initiationCap-snatchingGenome replicationModulation of innate immunity
04
Disease associations
InfectionInfluenza A virus infectionViral pathogenesis
05
Safety considerations
Potential for drug resistance due to viral mutationOff-target effects on host cell RNA processing
06
Biomarkers
PB2 mutations (e.g., E627K, D701N) as indicators of mammalian adaptation and virulence
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