Mutation detail:
| Mutation site | Q223R |
| Virus | Influenzavirus A H1N1 |
Mutation level  |
Amino acid Level |
| Gene/protein/region type | HA |
| Gene ID | 23308115 |
| Country | - |
| Mutation type |
nonsynonymous mutation |
| Genotype/subtype/clade | - |
| Sample |
cell line |
| Variants | - |
| Viral reference sequence | FJ966082.1 |
| Drug/antibody/vaccine | - |
| Transmissibility |
promote |
| Transmission mechanism | - |
| Pathogenicity |
- |
| Pathogenicity mechanism | - |
| Immune escape mutation | - |
| Immune escape mechanism | - |
| RT-PCR primers probes | - |
Protein detail:
| 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. |
Literature information:
| Pubmed ID | 20869738 |
| Clinical information | No |
| Disease | - |
| Published year | 2010 |
| Journal | Virology |
| Title | A mutation in the receptor binding site enhances infectivity of 2009 H1N1 influenza hemagglutinin pseudotypes without changing antigenicity |
| Author | Wei Wang,Juan A Castelan-Vega,Alicia Jimenez-Alberto,Russell Vassell,Zhiping Ye |
| Evidence | We found that the Q223R mutation greatly enhanced infectivity of HA-pseudotypes in human cells, which was further augmented by inclusion of the viral neuraminidase (NA) and M2 proteins. |