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Title: Fast Photochemical Oxidation of Proteins Maps the Topology of Intrinsic Membrane Proteins: Light-Harvesting Complex 2 in a Nanodisc

Journal Article · · Analytical Chemistry
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  1. Washington Univ., St. Louis, MO (United States). Photosynthetic Antenna Research Center

Although membrane proteins are crucial participants in photosynthesis and other biological processes, many lack high-resolution structures. Prior to achieving a high-resolution structure, we are investigating whether MS-based footprinting can provide coarse-grained protein structure by following structural changes that occur upon ligand binding, pH change, and membrane binding. Our platform probes topology and conformation of membrane proteins by combining MS-based footprinting, specifically fast photochemical oxidation of proteins (FPOP), and lipid Nanodiscs, which are more similar to the native membrane environment than are the widely used detergent micelles. We describe here results that show a protein’s outer membrane regions are more heavily footprinted by OH radicals whereas the regions spanning the lipid bilayer remain inert to the labeling. Nanodiscs generally exhibit more protection of membrane proteins compared to detergent micelles and less shielding to those protein residues that exist outside the membrane. The combination of immobilizing the protein in Nanodiscs and footprinting with FPOP is a feasible approach to map extra-membrane protein surfaces, even at the amino-acid level, and to illuminate intrinsic membrane protein topology.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Photosynthetic Antenna Research Center (PARC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001035
OSTI ID:
1388787
Journal Information:
Analytical Chemistry, Vol. 88, Issue 17; Related Information: PARC partners with Washington University in St. Louis (lead); University of California, Riverside; University of Glasgow, UK; Los Alamos National Laboratory; University of New Mexico; New Mexico Corsortium; North Carolina State University; Northwestern University; Oak Ridge National Laboratory; University of Pennsylvania; Sandia National Laboratories; University of Sheffield, UK; ISSN 0003-2700
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 49 works
Citation information provided by
Web of Science

References (60)

Molecular Mechanisms of Photosynthesis book December 2002
Detection and analysis of protein–protein interactions in organellar and prokaryotic proteomes by native gel electrophoresis: (Membrane) protein complexes and supercomplexes journal July 2006
Protein Transport and Signal Transduction During Fertilization in Chlamydomonas: Signaling and Transport in Chlamydomonas Fertilization journal June 2003
Genome-wide analysis of integral membrane proteins from eubacterial, archaean, and eukaryotic organisms journal April 1998
Diagnostic and Therapeutic Use of Membrane Proteins in Cancer Cells journal January 2011
Overcoming the challenges of membrane protein crystallography journal October 2008
Membrane proteins, lipids and detergents: not just a soap opera journal November 2004
Effects of lipid environment on the conformational changes of an ABC importer journal May 2014
Directed Self-Assembly of Monodisperse Phospholipid Bilayer Nanodiscs with Controlled Size journal March 2004
Reconstitution of Membrane Proteins into Model Membranes: Seeking Better Ways to Retain Protein Activities journal January 2013
Membrane-protein topology journal December 2006
The beginning of a beautiful friendship: Cross-linking/mass spectrometry and modelling of proteins and multi-protein complexes journal March 2011
Elucidation of substrate binding interactions in a membrane transport protein by mass spectrometry journal April 2003
Mass spectrometric methods to analyze the structural organization of macromolecular complexes journal November 2015
Protein Analysis by Hydrogen Exchange Mass Spectrometry journal June 2003
On the determinants of amide backbone exchange in proteins: a neutron crystallographic comparative study journal June 2008
Dynamics of the β 2 -Adrenergic G-Protein Coupled Receptor Revealed by Hydrogen−Deuterium Exchange journal January 2010
Mapping protein dynamics in catalytic intermediates of the redox-driven proton pump cytochrome c oxidase journal October 2006
Hydroxyl Radical-Mediated Modification of Proteins as Probes for Structural Proteomics journal August 2007
Dosimetry Determines the Initial OH Radical Concentration in Fast Photochemical Oxidation of Proteins (FPOP) journal February 2015
Elucidating in Vivo Structural Dynamics in Integral Membrane Protein by Hydroxyl Radical Footprinting journal May 2009
Structural Characterization of an Integral Membrane Protein in Its Natural Lipid Environment by Oxidative Methionine Labeling and Mass Spectrometry journal December 2008
Mapping the Structure of an Integral Membrane Protein under Semi-Denaturing Conditions by Laser-Induced Oxidative Labeling and Mass Spectrometry journal December 2009
Oxidative footprinting in the study of structure and function of membrane proteins: current state and perspectives journal October 2015
Visualizing Water Molecules in Transmembrane Proteins Using Radiolytic Labeling Methods journal February 2010
Structural waters define a functional channel mediating activation of the GPCR, rhodopsin journal August 2009
Nanodiscs separate chemoreceptor oligomeric states and reveal their signaling properties journal July 2006
Cooperativity in Cytochrome P450 3A4: LINKAGES IN SUBSTRATE BINDING, SPIN STATE, UNCOUPLING, AND PRODUCT FORMATION journal January 2007
Conformational Transitions in the Membrane Scaffold Protein of Phospholipid Bilayer Nanodiscs journal September 2011
A Conformational Investigation of Propeptide Binding to the Integral Membrane Protein γ-Glutamyl Carboxylase Using Nanodisc Hydrogen Exchange Mass Spectrometry journal February 2014
Membrane Interactions, Ligand-Dependent Dynamics, and Stability of Cytochrome P4503A4 in Lipid Nanodiscs journal February 2016
The purple bacterial photosynthetic unit journal May 1996
B850 pigment-protein complex of Rhodopseudomonas sphaeroides: Extinction coefficients, circular dichroism, and the reversible binding of bacteriochlorophyll journal September 1981
Fast Photochemical Oxidation of Protein Footprints Faster than Protein Unfolding journal August 2009
UniProt: a hub for protein information journal October 2014
The TOPCONS web server for consensus prediction of membrane protein topology and signal peptides journal May 2015
Top-Down Mass Spectrometry Analysis of Membrane-Bound Light-Harvesting Complex 2 from Rhodobacter sphaeroides journal November 2015
Protein Structural Deformation Induced Lifetime Shortening of Photosynthetic Bacteria Light-Harvesting Complex LH2 Excited State journal June 2005
Optimized Phospholipid Bilayer Nanodiscs Facilitate High-Resolution Structure Determination of Membrane Proteins journal January 2013
Biophysical characterization of membrane proteins in nanodiscs journal March 2013
Modulation of the Interaction between Neurotensin Receptor NTS1 and Gq Protein by Lipid journal March 2012
Reaction of ferritin with hydrogen peroxide induces lipid peroxidation journal March 2010
The Structure and Thermal Motion of the B800–850 LH2 Complex from Rps.acidophila at 2.0Å Resolution and 100K: New Structural Features and Functionally Relevant Motions journal March 2003
Structure and Dynamics of Phospholipid Nanodiscs from All-Atom and Coarse-Grained Simulations journal June 2015
Molecular Dynamics Simulations of Octyl Glucoside Micelles:  Structural Properties journal June 2000
Simulation studies of the interactions between membrane proteins and detergents journal October 2005
Membrane Protein Dynamics versus Environment: Simulations of OmpA in a Micelle and in a Bilayer journal June 2003
Steric Control of Bacteriochlorophyll Ligation journal January 2006
The crystal structure of the light-harvesting complex II (B800–850) from Rhodospirillum molischianum journal May 1996
The Fluid Mosaic Model of the Structure of Cell Membranes journal February 1972
Lipid–protein interactions in biological membranes: a structural perspective journal May 2003
Molecular Models of Nanodiscs journal September 2015
The Organization of LH2 Complexes in Membranes from Rhodobacter sphaeroides journal August 2008
Rapid membrane protein topology prediction journal April 2011
Carotenoid stoichiometry in the LH2 crystal: No spectral evidence for the presence of the second molecule in the α/β-apoprotein dimer journal June 2006
Coarse Grained Protein−Lipid Model with Application to Lipoprotein Particles journal March 2006
A Second and Unusual pucBA Operon of Rhodobacter sphaeroides 2.4.1: Genetics and Function of the Encoded Polypeptides journal October 2003
Expression characterization and actual function of the second pucBA in Rhodobacter sphaeroides journal March 2009
Differential assembly of polypeptides of the light-harvesting 2 complex encoded by distinct operons during acclimation of Rhodobacter sphaeroides to low light intensity journal August 2011
In Cell Footprinting Coupled with Mass Spectrometry for the Structural Analysis of Proteins in Live Cells journal July 2015

Cited By (3)

Integral membrane proteins: bottom-up, top-down and structural proteomics journal May 2017
Analyzing the structure of macromolecules in their native cellular environment using hydroxyl radical footprinting journal January 2018
Impact of the lipid bilayer on energy transfer kinetics in the photosynthetic protein LH2 journal April 2019