AVM

Protein name	Hemagglutinin
Uniprot protein ID	C3W627
Protein length	566 amino acids
Protein description	The HA protein is translated as an uncleaved HA0 precursor protein, folded as a trimer, and glycosylated and acylated. The HA protein binds to sialic acid-containing receptors on the cell surface, bringing about the attachment of the virus particle to the cell. This attachment induces virion internalization either through clathrin-dependent endocytosis or through clathrin- and caveolin-independent pathway. Plays a major role in the determination of host range restriction and virulence. Class I viral fusion protein. Responsible for penetration of the virus into the cell cytoplasm by mediating the fusion of the membrane of the endocytosed virus particle with the endosomal membrane. Low pH in endosomes induces an irreversible conformational change in HA2, releasing the fusion hydrophobic peptide. Several trimers are required to form a competent fusion pore.

Pubmed ID	22790606
Clinical information	No
Disease	-
Published year	2012
Journal	Euro Surveill
Title	Frequency of oseltamivir resistance in Sydney, during the Newcastle outbreak of community transmitted oseltamivir-resistant influenza A(H1N1)pdm09 virus, Australia, June to August 2020
Author	B Wang,J Taylor,M Ratnamohan,K McPhie,A Kesson
Evidence	the 2011 sequences showed five additional mutations (N44S, V62I, V241I, N369K and N386S) in NA and six additional amino acid substitutions (E130K, S160G, S202T, A214T, E391K and S468N) in HA (Figure 1). These were commonly present in most of the 2019 sequences and independent of their resistance profile.