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	33154243
Clinical information	No
Disease	-
Published year	2020
Journal	Indian J Med Microbiol
Title	Genetic sequencing of influenza A (H1N1) pdm09 isolates from South India, collected between 2011 and 2017 to detect mutations affecting virulence and resistance to oseltamivir
Author	P Nandhini,Sujatha Sistla
Evidence	Two samples collected from expired patients had D239N (D222G or D225G) mutation in HA.