Mutation detail:
| Mutation site | I38T |
| Virus | Influenzavirus A H1N1 |
Mutation level  |
Amino acid Level |
| Gene/protein/region type | PA |
| Gene ID | 23308128 |
| Country | USA |
| Mutation type |
nonsynonymous mutation |
| Genotype/subtype/clade | - |
| Sample |
cell line |
| Variants | - |
| Viral reference sequence | FJ966081.1 |
| Drug/antibody/vaccine | baloxavir resistant |
| Transmissibility |
- |
| Transmission mechanism | - |
| Pathogenicity |
- |
| Pathogenicity mechanism | - |
| Immune escape mutation | - |
| Immune escape mechanism | - |
| RT-PCR primers probes | - |
Protein detail:
| Protein name | Polymerase PA |
| Uniprot protein ID | C3W5X6 |
| Protein length | 716 amino acids |
| Protein description | PA Plays an essential role in viral RNA transcription and replication by forming the heterotrimeric polymerase complex together with PB1 and PB2 subunits. The complex transcribes viral mRNAs by using a unique mechanism called cap-snatching. It consists in the hijacking and cleavage of host capped pre-mRNAs. These short capped RNAs are then used as primers for viral mRNAs. The PB2 subunit is responsible for the binding of the 5' cap of cellular pre-mRNAs which are subsequently cleaved after 10-13 nucleotides by the PA subunit that carries the endonuclease activity. |
Literature information:
| Pubmed ID | 33469660 |
| Clinical information | No |
| Disease | - |
| Published year | 2021 |
| Journal | Nucleic acids research |
| Title | Structural insights into the substrate specificity of the endonuclease activity of the influenza virus cap-snatching mechanism |
| Author | Gyanendra Kumar,Maxime Cuypers,Richard R Webby,Thomas R Webb,Stephen W White |
| Evidence | To support this, we have failed to obtain RNA or DNA complex structures with PAN-I38T. While a number of mutations have been identified that have impacted the susceptibility of influenza viruses to baloxavir-like inhibitors, changes at position 38 are the most commonly observed clinically and the I38T mutation |