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- Title
Interfacial water molecules at biological membranes: Structural features and role for lateral proton diffusion.
- Authors
Nguyen, Trung Hai; Zhang, Chao; Weichselbaum, Ewald; Knyazev, Denis G.; Pohl, Peter; Carloni, Paolo
- Abstract
Proton transport at water/membrane interfaces plays a fundamental role for a myriad of bioenergetic processes. Here we have performed ab initio molecular dynamics simulations of proton transfer along two phosphatidylcholine bilayers. As found in previous theoretical studies, the excess proton is preferably located at the water/membrane interface. Further, our simulations indicate that it interacts not only with phosphate head groups, but also with water molecules at the interfaces. Interfacial water molecules turn out to be oriented relative to the lipid bilayers, consistently with experimental evidence. Hence, the specific water-proton interaction may help explain the proton mobility experimentally observed at the membrane interface.
- Subjects
PROTON mobility; LECITHIN; BILAYER lipid membranes; MOLECULAR dynamics; BIOENERGETICS
- Publication
PLoS ONE, 2018, Vol 13, Issue 2, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0193454