Influenza A virus nucleoprotein (NP)

The **Influenza A virus nucleoprotein (NP)** is a highly conserved structural and functional protein essential for the influenza A virus life cycle[2][3]. NP binds viral RNA (vRNA) to form ribonucleoprotein complexes (vRNPs) together with the viral polymerase (PA, PB1, PB2)[3][5]. It participates in viral genome encapsidation, mediates correct assembly and nuclear trafficking of vRNPs, and plays a central role in transcription and replication of the viral RNA genome[1][2][5]. NP is indispensable for viral RNA synthesis, interacting both with RNA directly and with itself via oligomerization, thus forming the core framework of the viral RNP structure[1][3][7]. Because NP is highly conserved and unique to the virus, it is considered a high-profile therapeutic target; inhibitors of NP can disrupt viral RNA replication, providing a promising avenue for antiviral drug development[2][7]. Key structural features include RNA binding grooves, oligomerization domains, and nuclear localization signals that promote import into the host cell nucleus[3][4]. NP does not have a cellular counterpart in the host, making it a selective target for antiviral approaches[2].

Other names

Influenza nucleoproteinIAV NPviral nucleoproteinNP (Influenza A)

Prevention of NP oligomerization; Disruption of NP-RNA binding; Interference with ribonucleoprotein complex assembly and function