Recombinant Influenza A Hemagglutinin protein (His tag) Strain Perth/16/09

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Biological function summary

The HA protein functions in a critical step of the viral life cycle called fusion. During the infection process hemagglutinin undergoes a structural change that facilitates the fusion of the viral envelope with the host cell membrane. This fusion process is essential to release the viral genome into the host cell. Hemagglutinin generally operates as part of a trimeric complex which enhances its ability to interact with host cell receptors. This interaction is vital for the virus to efficiently invade the host cells and propagate the infection throughout the host.

Pathways

Hemagglutinin plays an important role in the viral fusion pathway and the innate immune response pathway. It interacts with proteins like neuraminidase another surface protein of the influenza virus which assists in the release of progeny viruses from infected cells. During the fusion pathway HA's structural changes allow the viral and cellular membranes to merge a step necessary for the virus to establish infection. Its involvement in the immune response pathway also prompts the host immune system to recognize and respond to viral threats.