Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Membrane Proteins Have Distinct Fast Internal Motion and Residual Conformational Entropy

Journal Article · · Angewandte Chemie
 [1];  [2];  [3];  [1];  [1];  [1];  [1];  [3];  [4]
  1. Department of Biochemistry &, Biophysics University of Pennsylvania Perelman School of Medicine Philadelphia PA 19104 USA
  2. Department of Biochemistry &, Biophysics University of Pennsylvania Perelman School of Medicine Philadelphia PA 19104 USA, Present address: Department of Chemistry Virginia Commonwealth University Richmond VA 23284 USA
  3. Department of Biophysics Johns Hopkins University Baltimore MD 21218 USA
  4. Department of Biochemistry &, Biophysics Texas A&,M University College Station TX 77843 USA, Department of Biochemistry &, Biophysics University of Pennsylvania Perelman School of Medicine Philadelphia PA 19104 USA
Abstract

The internal motions of integral membrane proteins have largely eluded comprehensive experimental characterization. Here the fast side‐chain dynamics of the α‐helical sensory rhodopsin II and the β‐barrel outer membrane protein W have been investigated in lipid bilayers and detergent micelles by solution NMR relaxation techniques. Despite their differing topologies, both proteins have a similar distribution of methyl‐bearing side‐chain motion that is largely independent of membrane mimetic. The methyl‐bearing side chains of both proteins are, on average, more dynamic in the ps–ns timescale than any soluble protein characterized to date. Accordingly, both proteins retain an extraordinary residual conformational entropy in the folded state, which provides a counterbalance to the absence of the hydrophobic effect. Furthermore, the high conformational entropy could greatly influence the thermodynamics underlying membrane‐protein functions, including ligand binding, allostery, and signaling.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0012704
OSTI ID:
1632011
Alternate ID(s):
OSTI ID: 1616626
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 27 Vol. 132; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (51)

The outer membrane porin OmpW of Acinetobacter baumannii is involved in iron uptake and colistin binding journal January 2016
Solution-State NMR Spectroscopy of a Seven-Helix Transmembrane Protein Receptor: Backbone Assignment, Secondary Structure, and Dynamics journal September 2008
Mizellen, Bizellen und Nanoscheiben: Einfluss von membranimitierenden Umgebungen auf die Membranproteindynamik journal November 2016
Solution-State NMR Spectroscopy of a Seven-Helix Transmembrane Protein Receptor: Backbone Assignment, Secondary Structure, and Dynamics journal September 2008
Micelles, Bicelles, and Nanodiscs: Comparing the Impact of Membrane Mimetics on Membrane Protein Backbone Dynamics journal November 2016
Optimal Bicelle Size q for Solution NMR Studies of the Protein Transmembrane Partition journal December 2016
Banding 2of NMR-derived methyl order parameters: Implications for protein dynamics: Banding of Methyl-Bearing Side Chain Motion journal April 2014
Improving yields of deuterated, methyl labeled protein by growing in H2O journal August 2018
Probing the Sensory Rhodopsin II Binding Domain of its Cognate Transducer by Calorimetry and Electrophysiology journal July 2003
NMR studies of water bound to biological molecules journal September 1997
Characterization of Internal Protein Dynamics and Conformational Entropy by NMR Relaxation book January 2019
The Dynamic Process of β2-Adrenergic Receptor Activation journal January 2013
Functional characterization of sensory rhodopsin II from Halobacterium salinarum expressed in Escherichia coli journal May 2005
Characterization of Denatured States and Reversible Unfolding of Sensory Rhodopsin II journal October 2018
NMR Polypeptide Backbone Conformation of the E. coli Outer Membrane Protein W journal August 2014
Low- q Bicelles Are Mixed Micelles journal July 2018
Dominant forces in protein folding journal August 1990
Local and Global Dynamics of the G Protein-Coupled Receptor CXCR1 journal March 2011
Fast Time Scale Dynamics of Protein Backbones:  NMR Relaxation Methods, Applications, and Functional Consequences journal May 2006
Characterization of the Fast Dynamics of Protein Amino Acid Side Chains Using NMR Relaxation in Solution journal May 2006
Model-free approach to the interpretation of nuclear magnetic resonance relaxation in macromolecules. 1. Theory and range of validity journal August 1982
Model-free approach to the interpretation of nuclear magnetic resonance relaxation in macromolecules. 2. Analysis of experimental results journal August 1982
An Effective Method for the Discrimination of Motional Anisotropy and Chemical Exchange journal March 2002
Solution NMR Spectroscopy of the Human Vasopressin V2 Receptor, A G Protein-Coupled Receptor journal June 2005
Coupled Motion in Proteins Revealed by Pressure Perturbation journal April 2012
Optimized Phospholipid Bilayer Nanodiscs Facilitate High-Resolution Structure Determination of Membrane Proteins journal January 2013
Microscopic Insights into the NMR Relaxation-Based Protein Conformational Entropy Meter journal September 2013
Impact of Bilayer Lipid Composition on the Structure and Topology of the Transmembrane Amyloid Precursor C99 Protein journal March 2014
An Optimized Relaxation-Based Coherence Transfer NMR Experiment for the Measurement of Side-Chain Order in Methyl-Protonated, Highly Deuterated Proteins journal December 2011
A Novel Negative Regulation Mechanism of Bacterial Outer Membrane Proteins in Response to Antibiotic Resistance journal November 2010
Microscopic origins of entropy, heat capacity and the glass transition in proteins journal May 2001
Redistribution and loss of side chain entropy upon formation of a calmodulin–peptide complex journal January 2000
Conformational entropy in molecular recognition by proteins journal July 2007
Activation of G-protein-coupled receptors correlates with the formation of a continuous internal water pathway journal September 2014
Structure determination of the seven-helix transmembrane receptor sensory rhodopsin II by solution NMR spectroscopy journal May 2010
New Insights on Signal Propagation by Sensory Rhodopsin II/Transducer Complex journal February 2017
Theory of NMR relaxation in macromolecules: Restricted diffusion and jump models for multiple internal rotations in amino acid side chains journal August 1978
Membrane protein thermodynamic stability may serve as the energy sink for sorting in the periplasm journal February 2013
Entropy in molecular recognition by proteins journal June 2017
X-ray structure of sensory rhodopsin II at 2.1-A resolution journal August 2001
Detergent- and phospholipid-based reconstitution systems have differential effects on constitutive activity of G-protein–coupled receptors journal July 2019
The Outer Membrane Protein OmpW Forms an Eight-stranded β-Barrel with a Hydrophobic Channel journal January 2006
A guide to quantifying membrane protein dynamics in lipids and other native‐like environments by solution‐state NMR spectroscopy journal September 2018
The energy landscapes and motions of proteins journal December 1991
Protein hydration in aqueous solution journal November 1991
Retinal isomerization in bacteriorhodopsin captured by a femtosecond x-ray laser journal June 2018
Energetics of Membrane Protein Folding journal May 2014
Measuring Entropy in Molecular Recognition by Proteins journal May 2018
MEMBRANE PROTEIN FOLDING AND STABILITY: Physical Principles journal June 1999
Temperature Dependence of Fast Dynamics in Proteins journal March 2007
Ligand modulation of sidechain dynamics in a wild-type human GPCR journal October 2017

Similar Records

Membrane Proteins Have Distinct Fast Internal Motion and Residual Conformational Entropy
Journal Article · Wed Apr 29 20:00:00 EDT 2020 · Angewandte Chemie (International Edition) · OSTI ID:1630950

Related Subjects