Results 11 to 20 of about 230,876 (232)

Pseudo-Jahn-Teller origin of the low barrier hydrogen bond in N2H7+ [PDF]

open access: greenThe Journal of Chemical Physics, 2008
The microscopic origin and quantum effects of the low barrier hydrogen bond (LBHB) in the proton-bound ammonia dimer cation N(2)H(7) (+) were studied by means of ab initio and density-functional theory (DFT) methods.
Pablo García‐Fernández   +5 more
semanticscholar   +7 more sources

Low-barrier hydrogen bond in photoactive yellow protein [PDF]

open access: greenProceedings of the National Academy of Sciences, 2009
Low-barrier hydrogen bonds (LBHBs) have been proposed to play roles in protein functions, including enzymatic catalysis and proton transfer. Transient formation of LBHBs is expected to stabilize specific reaction intermediates. However, based on experimental results and theoretical considerations, arguments against the importance of LBHB in proteins ...
Shigeo Yamaguchi   +7 more
semanticscholar   +6 more sources

Breaking the low barrier hydrogen bond in a serine protease [PDF]

open access: bronzeProtein Science, 1999
AbstractThe serine protease subtilisin BPN' is a useful catalyst for peptide synthesis when dissolved in high concentrations of a water‐miscible organic co‐solvent such as N, N‐dimethylformamide (DMF). However, in 50% DMF, the kcat for amide hydrolysis is two orders of magnitude lower than in aqueous solution.
Richard Kidd   +5 more
semanticscholar   +5 more sources

Absorption wavelength along chromophore low-barrier hydrogen bonds

open access: yesiScience, 2022
Summary: In low-barrier hydrogen bonds (H-bonds), the pKa values for the H-bond donor and acceptor moieties are nearly equal, whereas the redox potential values depend on the H+ position. Spectroscopic details of low-barrier H-bonds remain unclear. Here,
Masaki Tsujimura   +3 more
doaj   +3 more sources

Low Barrier Hydrogen Bond Is Absent in the Catalytic Triads in the Ground State but Is Present in a Transition-state Complex in the Prolyl Oligopeptidase Family of Serine Proteases [PDF]

open access: hybridJournal of Biological Chemistry, 1997
High frequency proton NMR spectra for two members of the prolyl oligopeptidase class of serine proteases, prolyl oligopeptidase and oligopeptidase B, showed that resonances corresponding to the active center histidine Nδ1H and Nε2H generally observed in ...
Ara Kahyaoglu   +6 more
openalex   +2 more sources

Synthesis of Monothiacalix[4]arene Using the Fragment Condensation Approach [PDF]

open access: yesMolecules
The article describes a simple and scalable preparation of 2-monothiacalix[4]arene 7, the simplest representative of the mixed-bridged (CH2 and S) calix[4]arenes.
Daniel Kortus   +7 more
doaj   +2 more sources

The Low Barrier Hydrogen Bond in the Photoactive Yellow Protein: A Vacuum Artifact Absent in the Crystal and Solution

open access: bronzeJournal of the American Chemical Society, 2016
Timo Graen   +4 more
openalex   +2 more sources

NMR evidence for the participation of a low-barrier hydrogen bond in the mechanism of delta 5-3-ketosteroid isomerase.

open access: bronzeProceedings of the National Academy of Sciences of the United States of America, 1996
Qian Zhao   +3 more
openalex   +2 more sources

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