Target intelligence / Profile preview

Hemagglutinin Protein (Influenza A Virus) (HA)

Target
HA
Molecular classification
Glycoprotein, Viral fusion protein, Class I viral fusion protein
01

Overview

Hemagglutinin (HA) is a homotrimeric glycoprotein and the most abundant surface protein on the influenza A virus. It mediates both attachment to host cells and fusion of viral and cellular membranes. HA is essential for influenza virus entry, making it a primary target for neutralizing antibodies and antiviral strategies.

Other names
HemagglutininHA proteinInfluenza hemagglutinin
02

Mechanism of action

Inhibition of receptor binding or membrane fusion

03

Biological functions

Receptor binding (sialic acid)Membrane fusionViral entryAgglutination
04

Disease associations

InfectionInfluenzaPandemic potential
05

Safety considerations

Antigenic drift and shift leading to resistancePotential for off-target effects of inhibitors
06

Interacting drugs

NA inhibitors (indirectly, by preventing virus release)

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