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Title: Probing the remarkable thermal kinetics of visual rhodopsin with E181Q and S186A mutants

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4984818· OSTI ID:1474078

We recently reported a very unusual temperature dependence of the rate of thermal reaction of wild type bovine rhodopsin: the Arrhenius plot exhibits a sharp “elbow” at 47 °C and, in the upper temperature range, an unexpectedly large activation energy (114 ± 8 kcal/mol) and an enormous prefactor (1072±5 s-1). In this report, we present new measurements and a theoretical model that establish convincingly that this behavior results from a collective, entropy-driven breakup of the rigid hydrogen bonding networks (HBNs) that hinder the reaction at lower temperatures. For E181Q and S186A, two rhodopsin mutants that disrupt the HBNs near the binding pocket of the 11-cis retinyl chromophore, we observe significant decreases in the activation energy (~90 kcal/mol) and prefactor (~1060 s-1), consistent with the conclusion that the reaction rate is enhanced by breakup of the HBN. Finally, the results provide insights into the molecular mechanism of dim-light vision and eye diseases caused by inherited mutations in the rhodopsin gene that perturb the HBNs.

Research Organization:
Yale Univ., New Haven, CT (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
FG02-05ER15677; MCB-0955407; CHE 1465108
OSTI ID:
1474078
Alternate ID(s):
OSTI ID: 1365428
Journal Information:
Journal of Chemical Physics, Vol. 146, Issue 21; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (50)

Molecular Mechanisms of Disease for Mutations at Gly-90 in Rhodopsin journal September 2011
Ratio of entropy to enthalpy in thermal transitions in biological tissues journal January 2006
Comparison of Stability Predictions and Simulated Unfolding of Rhodopsin Structures†: Photochemistry and Photobiology, 2007, 83 journal March 2007
Spectral Tuning of Ultraviolet Cone Pigments: An Interhelical Lock Mechanism journal December 2013
Molecular Mechanisms of Rhodopsin Retinitis Pigmentosa and the Efficacy of Pharmacological Rescue journal February 2010
Relative Stability of Hydrogen and Deuterium Bonds journal January 1996
Thermal Properties of Rhodopsin: INSIGHT INTO THE MOLECULAR MECHANISM OF DIM-LIGHT VISION journal June 2011
On the molecular origin of photoreceptor noise journal November 1993
Hybrid Models for Combined Quantum Mechanical and Molecular Mechanical Approaches journal January 1996
Stability of Dark State Rhodopsin Is Mediated by a Conserved Ion Pair in Intradiscal Loop E-2 journal January 2003
Entropy–enthalpy compensation of biomolecular systems in aqueous phase: a dry perspective journal October 2012
Influence of surface phase transitions on desorption kinetics: the compensation effect journal August 1986
A new ONIOM implementation in Gaussian98. Part I. The calculation of energies, gradients, vibrational frequencies and electric field derivatives journal April 1999
Spectral Tuning in Halorhodopsin: The Chloride Pump Photoreceptor journal June 2013
The Retinal Conformation and its Environment in Rhodopsin in Light of a New 2.2Å Crystal Structure journal September 2004
The Thermal Stability of Rhodopsin and Opsin journal November 1958
Origin of the low thermal isomerization rate of rhodopsin chromophore journal June 2015
On the amine-catalyzed isomerization of vitamin A aldehydes journal January 1984
Salt Effects on the Conformational Stability of the Visual G-Protein-Coupled Receptor Rhodopsin journal December 2011
Thermal Stability of Rhodopsin and Progression of Retinitis Pigmentosa: COMPARISON OF S186W AND D190N RHODOPSIN MUTANTS journal April 2013
Assessing structural elements that influence Schiff base stability: mutants E113Q and D190N destabilize rhodopsin through different mechanisms journal December 2003
Brownian motion in a field of force and the diffusion model of chemical reactions journal April 1940
Comparison of the isomerization mechanisms of human melanopsin and invertebrate and vertebrate rhodopsins journal January 2014
QM/MM Study of Energy Storage and Molecular Rearrangements Due to the Primary Event in Vision journal November 2004
A point mutation of the rhodopsin gene in one form of retinitis pigmentosa journal January 1990
Why 11- cis -Retinal? Why Not 7- cis -, 9- cis -, or 13- cis- Retinal in the Eye? journal November 2011
Two-state models of protein folding kinetics journal January 1997
Thermal Decay of Rhodopsin: Role of Hydrogen Bonds in Thermal Isomerization of 11- cis Retinal in the Binding Site and Hydrolysis of Protonated Schiff Base journal July 2009
Unusual kinetics of thermal decay of dim-light photoreceptors in vertebrate vision journal July 2014
IMOMM: A new integratedab initio + molecular mechanics geometry optimization scheme of equilibrium structures and transition states journal September 1995
Reaction-rate theory: fifty years after Kramers journal April 1990
The photocurrent, noise and spectral sensitivity of rods of the monkey Macaca fascicularis. journal December 1984
The Active Site of Melanopsin: The Biological Clock Photoreceptor journal November 2012
The Molecular Mechanism of Thermal Noise in Rod Photoreceptors journal September 2012
Curvature and Hydrophobic Forces Drive Oligomerization and Modulate Activity of Rhodopsin in Membranes journal December 2006
Quantum Monte Carlo Treatment of the Charge Transfer and Diradical Electronic Character in a Retinal Chromophore Minimal Model journal February 2015
Analysis of Disease-Linked Rhodopsin Mutations Based on Structure, Function, and Protein Stability Calculations journal January 2011
Combining Quantum Mechanics Methods with Molecular Mechanics Methods in ONIOM journal May 2006
Chemical Kinetic Analysis of Thermal Decay of Rhodopsin Reveals Unusual Energetics of Thermal Isomerization and Hydrolysis of Schiff Base journal September 2011
Role of the Retinal Hydrogen Bond Network in Rhodopsin Schiff Base Stability and Hydrolysis journal October 2004
Effects of the Terminal Aromatic Residues on Polyproline Conformation: Thermodynamic and Kinetic Studies journal December 2015
Color Vision: “OH-Site” Rule for Seeing Red and Green journal June 2012
SORCI for photochemical and thermal reaction paths: A benchmark study journal July 2014
Thermodynamic characterization of the palm tree Roystonea regia peroxidase stability journal November 2008
QM/MM Study of Dehydro and Dihydro β-Ionone Retinal Analogues in Squid and Bovine Rhodopsins: Implications for Vision in Salamander Rhodopsin journal November 2010
QM/MM Study of the Structure, Energy Storage, and Origin of the Bathochromic Shift in Vertebrate and Invertebrate Bathorhodopsins journal April 2011
Structure of Bovine Rhodopsin in a Trigonal Crystal Form journal November 2004
Irreversible Denaturation of Maltodextrin Glucosidase Studied by Differential Scanning Calorimetry, Circular Dichroism, and Turbidity Measurements journal December 2014
Structural waters define a functional channel mediating activation of the GPCR, rhodopsin journal August 2009
Functional role of internal water molecules in rhodopsin revealed by x-ray crystallography journal April 2002

Cited By (3)

The counterion–retinylidene Schiff base interaction of an invertebrate rhodopsin rearranges upon light activation journal May 2019
The counterion–retinylidene Schiff base interaction of an invertebrate rhodopsin rearranges upon light activation text January 2019
Controlling the dynamics of the Nek2 leucine zipper by engineering of "kinetic" disulphide bonds text January 2019

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