Related ArticlesIntegrating solid-state NMR and computational modeling to investigate the structure and dynamics of membrane-associated ghrelin.
PLoS One. 2015;10(3):e0122444
Authors: Vortmeier G, DeLuca SH, Els-Heindl S, Chollet C, Scheidt HA, Beck-Sickinger AG, Meiler J, Huster D
Abstract
The peptide hormone ghrelin activates the growth hormone secretagogue receptor 1a, also known as the ghrelin receptor. This 28-residue peptide is acylated at Ser3 and is the only peptide hormone in the human body that is lipid-modified by an octanoyl group. Little is known about the structure and dynamics of membrane-associated ghrelin. We carried out solid-state NMR studies of ghrelin in lipid vesicles, followed by computational modeling of the peptide using Rosetta. Isotropic chemical shift data of isotopically labeled ghrelin provide information about the peptide's secondary structure. Spin diffusion experiments indicate that ghrelin binds to membranes via its lipidated Ser3. Further, Phe4, as well as electrostatics involving the peptide's positively charged residues and lipid polar headgroups, contribute to the binding energy. Other than the lipid anchor, ghrelin is highly flexible and mobile at the membrane surface. This observation is supported by our predicted model ensemble, which is in good agreement with experimentally determined chemical shifts. In the final ensemble of models, residues 8-17 form an ?-helix, while residues 21-23 and 26-27 often adopt a polyproline II helical conformation. These helices appear to assist the peptide in forming an amphipathic conformation so that it can bind to the membrane.
[NMR paper] Advanced solid-state NMR techniques for characterization of membrane protein structure and dynamics: Application to Anabaena Sensory Rhodopsin.
Advanced solid-state NMR techniques for characterization of membrane protein structure and dynamics: Application to Anabaena Sensory Rhodopsin.
Related Articles Advanced solid-state NMR techniques for characterization of membrane protein structure and dynamics: Application to Anabaena Sensory Rhodopsin.
J Magn Reson. 2014 Dec 26;
Authors: Ward ME, Brown LS, Ladizhansky V
Abstract
Studies of the structure, dynamics, and function of membrane proteins (MPs) have long been considered one of the main applications of solid-state...
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[NMR paper] Advanced Solid-State NMR Techniques for Characterization of Membrane Protein Structure and Dynamics: Application to Anabaena Sensory Rhodopsin
Advanced Solid-State NMR Techniques for Characterization of Membrane Protein Structure and Dynamics: Application to Anabaena Sensory Rhodopsin
Publication date: Available online 26 December 2014
Source:Journal of Magnetic Resonance</br>
Author(s): Meaghan E. Ward , Leonid S. Brown , Vladimir Ladizhansky</br>
Studies of the structure, dynamics, and function of membrane proteins (MPs) have long been considered one of the main applications of solid-state NMR (SSNMR). Advances in instrumentation, and the plethora of new SSNMR methodologies developed over the past...
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12-27-2014 03:04 AM
Cu-SOD structure and dynamics by solid-state NMR [Biophysics and Computational Biology]
Cu-SOD structure and dynamics by solid-state NMR
Knight, M. J., Pell, A. J., Bertini, I., Felli, I. C., Gonnelli, L., Pierattelli, R., Herrmann, T., Emsley, L., Pintacuda, G....
Date: 2012-07-10
We introduce a new approach to improve structural and dynamical determination of large metalloproteins using solid-state nuclear magnetic resonance (NMR) with 1H detection under ultrafast magic angle spinning (MAS). The approach is based on the rapid and sensitive acquisition of an extensive set of 15N and 13C nuclear relaxation rates. The system on which we demonstrate these methods is the...
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07-10-2012 06:01 PM
Molecular simulations and solid-state NMR investigate dynamical structure in rhodopsin activation.
Molecular simulations and solid-state NMR investigate dynamical structure in rhodopsin activation.
Molecular simulations and solid-state NMR investigate dynamical structure in rhodopsin activation.
Biochim Biophys Acta. 2011 Aug 8;
Authors: Mertz B, Struts AV, Feller SE, Brown MF
Abstract
Rhodopsin has served as the primary model for studying G protein-coupled receptors (GPCRs)-the largest group in the human genome, and consequently a primary target for pharmaceutical development. Understanding the functions and activation mechanisms of...
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08-20-2011 03:31 PM
Solid-state 2H NMR relaxation illuminates functional dynamics of retinal cofactor in membrane activation of rhodopsin [Biophysics and Computational Biology]
Solid-state 2H NMR relaxation illuminates functional dynamics of retinal cofactor in membrane activation of rhodopsin
Struts, A. V., Salgado, G. F. J., Brown, M. F....
Date: 2011-05-17
Rhodopsin is a canonical member of the family of G protein-coupled receptors, which transmit signals across cellular membranes and are linked to many drug interventions in humans. Here we show that solid-state 2H NMR relaxation allows investigation of light-induced changes in local ps–ns time scale motions of retinal bound to rhodopsin. Site-specific 2H labels were introduced into methyl groups of the...
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05-17-2011 08:40 PM
Structure and dynamics of cationic membrane peptides and proteins: Insights from solid-state NMR.
Structure and dynamics of cationic membrane peptides and proteins: Insights from solid-state NMR.
Structure and dynamics of cationic membrane peptides and proteins: Insights from solid-state NMR.
Protein Sci. 2011 Feb 22;
Authors: Hong M, Su Y
Many membrane peptides and protein domains contain functionally important cationic Arg and Lys residues, whose insertion into the hydrophobic interior of the lipid bilayer encounters significant energy barriers. To understand how these cationic molecules overcome the free energy barrier to insert into the...
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02-24-2011 11:04 AM
[NMR paper] Determination of membrane protein structure and dynamics by magic-angle-spinning solid-state NMR spectroscopy.
Determination of membrane protein structure and dynamics by magic-angle-spinning solid-state NMR spectroscopy.
Related Articles Determination of membrane protein structure and dynamics by magic-angle-spinning solid-state NMR spectroscopy.
J Am Chem Soc. 2005 Sep 21;127(37):12965-74
Authors: Andronesi OC, Becker S, Seidel K, Heise H, Young HS, Baldus M
It is shown that molecular structure and dynamics of a uniformly labeled membrane protein can be studied under magic-angle-spinning conditions. For this purpose, dipolar recoupling experiments...
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12-01-2010 06:56 PM
[NMR paper] Membrane structure and dynamics as viewed by solid-state NMR spectroscopy.
Membrane structure and dynamics as viewed by solid-state NMR spectroscopy.
Related Articles Membrane structure and dynamics as viewed by solid-state NMR spectroscopy.
Biophys Chem. 1997 Oct;68(1-3):233-41
Authors: Auger M
The purpose of the present study is the investigation of the structure and dynamics of biological membranes using solid-state nuclear magnetic resonance (NMR) spectroscopy. Two approaches are used in our laboratory. The first involves the measurement of high-resolution 13C and 1H spectra obtained by the magic angle spinning...
Integrating solid-state NMR and computational modeling to investigate the structure and dynamics of membrane-associated ghrelin.
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