High-resolution structures of the M2 channel from influenza A virus reveal dynamic pathways for proton stabilization and transduction.
Thomaston, J.L., Alfonso-Prieto, M., Woldeyes, R.A., Fraser, J.S., Klein, M.L., Fiorin, G., DeGrado, W.F.(2015) Proc Natl Acad Sci U S A 112: 14260-14265
- PubMed: 26578770 
- DOI: 10.1073/pnas.1518493112
- Primary Citation of Related Structures:  
4QK7, 4QKC, 4QKL, 4QKM - PubMed Abstract: 
The matrix 2 (M2) protein from influenza A virus is a proton channel that uses His37 as a selectivity filter. Here we report high-resolution (1.10 Å) cryogenic crystallographic structures of the transmembrane domain of M2 at low and high pH. These structures reveal that waters within the pore form hydrogen-bonded networks or "water wires" spanning 17 Å from the channel entrance to His37 ...