A complex epistatic network limits the mutational reversibility in the influenza hemagglutinin receptor-binding site.
Wu, N.C., Thompson, A.J., Xie, J., Lin, C.W., Nycholat, C.M., Zhu, X., Lerner, R.A., Paulson, J.C., Wilson, I.A.(2018) Nat Commun 9: 1264-1264
- PubMed: 29593268 
- DOI: 10.1038/s41467-018-03663-5
- Primary Citation of Related Structures:  
6BKM, 6BKN, 6BKO, 6BKP, 6BKQ, 6BKR, 6BKS, 6BKT - PubMed Abstract: 
The hemagglutinin (HA) receptor-binding site (RBS) in human influenza A viruses is critical for attachment to host cells, which imposes a functional constraint on its natural evolution. On the other hand, being part of the major antigenic sites, the HA RBS of human H3N2 viruses needs to constantly mutate to evade the immune system ...