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- W2891687141 endingPage "18988" @default.
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- W2891687141 abstract "Vacuolar ATPases are multisubunit protein complexes that are indispensable for acidification and pH homeostasis in a variety of physiological processes in all eukaryotic cells. An arginine residue (Arg735) in transmembrane helix 7 (TM7) of subunit a of the yeast ATPase is known to be essential for proton translocation. However, the specific mechanism of its involvement in proton transport remains to be determined. Arginine residues are usually assumed to “snorkel” toward the protein surface when exposed to a hydrophobic environment. Here, using solution NMR spectroscopy, molecular dynamics simulations, and in vivo yeast assays, we obtained evidence for the formation of a transient, membrane-embedded cation–π interaction in TM7 between Arg735 and two highly conserved nearby aromatic residues, Tyr733 and Trp737. We propose a mechanism by which the transient, membrane-embedded cation–π complex provides the necessary energy to keep the charged side chain of Arg735 within the hydrophobic membrane. Such cation–π interactions may define a general mechanism to retain charged amino acids in a hydrophobic membrane environment." @default.
- W2891687141 created "2018-09-27" @default.
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- W2891687141 creator A5087943093 @default.
- W2891687141 date "2018-12-01" @default.
- W2891687141 modified "2023-09-28" @default.
- W2891687141 title "A cation–π interaction in a transmembrane helix of vacuolar ATPase retains the proton-transporting arginine in a hydrophobic environment" @default.
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- W2891687141 doi "https://doi.org/10.1074/jbc.ra118.005276" @default.
- W2891687141 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6295739" @default.
- W2891687141 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30209131" @default.