DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Native top-down mass spectrometry for the structural characterization of human hemoglobin

Journal Article · · European Journal of Mass Spectrometry
DOI: https://doi.org/10.1255/ejms.1340 · OSTI ID:1345518
 [1];  [2];  [2];  [2]
  1. Univ. of California, Los Angeles, CA (United States); DOE Office of Scientific and Technical Information (OSTI)
  2. Univ. of California, Los Angeles, CA (United States)

Native mass spectrometry (MS) has become an invaluable tool for the characterization of proteins and non-covalent protein complexes under near physiological solution conditions. Here we report the structural characterization of human hemoglobin (Hb), a 64 kDa oxygen-transporting protein complex, by high resolution native top-down mass spectrometry using electrospray ionization (ESI) and a 15-Tesla Fourier transform ion cyclotron resonance (FTICR) mass spectrometer. Native MS preserves the non-covalent interactions between the globin subunits, and electron capture dissociation (ECD) produces fragments directly from the intact Hb complex without dissociating the subunits. Using activated ion ECD, we observe the gradual unfolding process of the Hb complex in the gas phase. Without protein ion activation, the native Hb shows very limited ECD fragmentation from the N-termini, suggesting a tightly packed structure of the native complex and therefore low fragmentation efficiency. Precursor ion activation allows steady increase of N-terminal fragment ions, while the C-terminal fragments remain limited (38 c ions and 4 z ions on the α chain; 36 c ions and 2 z ions on the β chain). This ECD fragmentation pattern suggests that upon activation, the Hb complex starts to unfold from the N-termini of both subunits, whereas the C-terminal regions and therefore the potential regions involved in the subunit binding interactions remain intact. ECD-MS of the Hb dimer show similar fragmentation patterns as the Hb tetramer, providing further evidence for the hypothesized unfolding process of the Hb complex in the gas phase. Native top-down ECD-MS allows efficient probing of the Hb complex structure and the subunit binding interactions in the gas phase. Finally, it may provide a fast and effective means to probe the structure of novel protein complexes that are intractable to traditional structural characterization tools.

Research Organization:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FC03-02ER63421
OSTI ID:
1345518
Journal Information:
European Journal of Mass Spectrometry, Journal Name: European Journal of Mass Spectrometry Journal Issue: 3 Vol. 21; ISSN 1469-0667
Publisher:
IM PublicationsCopyright Statement
Country of Publication:
United States
Language:
English

References (56)

Studying noncovalent protein complexes by electrospray ionization mass spectrometry journal January 1997
Electrostatic Stabilization of a Native Protein Structure in the Gas Phase journal November 2010
Electrostatic Stabilization of a Native Protein Structure in the Gas Phase journal November 2010
Studying 18 MDa Virus Assemblies with Native Mass Spectrometry journal February 2013
Bioinformatics book January 2008
Protein Structure Determination by X-Ray Crystallography book January 2008
Protein–Protein Binding Affinities in Solution Determined by Electrospray Mass Spectrometry journal February 2011
Mapping a Noncovalent Protein–Peptide Interface by Top-Down FTICR Mass Spectrometry Using Electron Capture Dissociation journal May 2011
Revealing Ligand Binding Sites and Quantifying Subunit Variants of Noncovalent Protein Complexes in a Single Native Top-Down FTICR MS Experiment journal June 2014
Atomic resolution cryo electron microscopy of macromolecular complexes book April 2011
Protein structure determination in solution by NMR spectroscopy. journal December 1990
Unfolding of proteins monitored by electrospray ionization mass spectrometry: a comparison of positive and negative ion modes journal December 1998
Systematic Interactome Mapping and Genetic Perturbation Analysis of a C. elegans TGF-β Signaling Network journal February 2004
Electrospray ionization mass spectrometry: a technology for studying noncovalent macromolecular complexes journal December 2000
Gas-phase dissociation of hemoglobin journal September 2001
A Human Protein-Protein Interaction Network: A Resource for Annotating the Proteome journal September 2005
A Protein–Protein Interaction Network for Human Inherited Ataxias and Disorders of Purkinje Cell Degeneration journal May 2006
Top-down mass spectrometry of supercharged native protein–ligand complexes journal March 2011
Native electrospray ionization and electron-capture dissociation for comparison of protein structure in solution and the gas phase journal November 2013
Folding and assembly of hemoglobin monitored by electrospray mass spectrometry using an on-line dialysis system journal January 2007
Analysis of protein mixtures by electrospray mass spectrometry: Effects of conformation and desolvation behavior on the signal intensities of hemoglobin subunits journal July 2007
Collisional activation of protein complexes: Picking up the pieces journal March 2009
Elucidating the site of protein-ATP binding by top-down mass spectrometry journal June 2010
Deciphering modifications in swine cardiac troponin I by top-down high-resolution tandem mass spectrometry journal June 2010
Native Electrospray and Electron-Capture Dissociation in FTICR Mass Spectrometry Provide Top-Down Sequencing of a Protein Component in an Intact Protein Assembly journal December 2010
Molecular dynamics of protein complexes from four-dimensional cryo-electron microscopy journal September 2004
A Protein Interaction Network Links GIT1, an Enhancer of Huntingtin Aggregation, to Huntington's Disease journal September 2004
A Protein Interaction Network Links GIT1, an Enhancer of Huntingtin Aggregation, to Huntington’s Disease journal July 2005
Protein–protein interactions in human disease journal August 2005
The Nitty-Gritty of Protein Interactions journal December 2005
Huntingtin–protein interactions and the pathogenesis of Huntington's disease journal March 2004
Activated Ion Electron Capture Dissociation for Mass Spectral Sequencing of Larger (42 kDa) Proteins journal October 2000
Combined Electron Capture and Infrared Multiphoton Dissociation for Multistage MS/MS in a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer journal July 2003
Native Electrospray and Electron-Capture Dissociation FTICR Mass Spectrometry for Top-Down Studies of Protein Assemblies journal July 2011
Native Top-Down Electrospray Ionization-Mass Spectrometry of 158 kDa Protein Complex by High-Resolution Fourier Transform Ion Cyclotron Resonance Mass Spectrometry journal December 2013
Highly Asymmetric Interactions between Globin Chains during Hemoglobin Assembly Revealed by Electrospray Ionization Mass Spectrometry journal August 2003
Observation of the heme-globin complex in native myoglobin by electrospray-ionization mass spectrometry journal October 1991
Top-Down ESI-ECD-FT-ICR Mass Spectrometry Localizes Noncovalent Protein-Ligand Binding Sites journal November 2006
Top-Down Quantitative Proteomics Identified Phosphorylation of Cardiac Troponin I as a Candidate Biomarker for Chronic Heart Failure journal September 2011
Structure of Hæmoglobin: A Three-Dimensional Fourier Synthesis at 5.5-Å. Resolution, Obtained by X-Ray Analysis journal February 1960
Stereochemistry of Cooperative Effects in Haemoglobin: Haem–Haem Interaction and the Problem of Allostery journal November 1970
Systematic identification of protein complexes in Saccharomyces cerevisiae by mass spectrometry journal January 2002
Towards a proteome-scale map of the human protein–protein interaction network journal September 2005
Proteome survey reveals modularity of the yeast cell machinery journal January 2006
Global landscape of protein complexes in the yeast Saccharomyces cerevisiae journal March 2006
Analysis of the human protein interactome and comparison with yeast, worm and fly interaction datasets journal February 2006
The way to NMR structures of proteins journal November 2001
Interaction between amyloid precursor protein and presenilins in mammalian cells: Implications for the pathogenesis of Alzheimer disease journal July 1997
Staphylococcus aureus Uses a Novel Multidomain Receptor to Break Apart Human Hemoglobin and Steal Its Heme journal November 2012
Aberrant Interactions of Transcriptional Repressor Proteins with the Huntington's Disease Gene Product, Huntingtin journal September 1999
Protein interaction mapping: A Drosophila case study journal February 2005
A Protein Interaction Map of Drosophila melanogaster journal December 2003
A Map of the Interactome Network of the Metazoan C. elegans journal January 2004
High-Quality Binary Protein Interaction Map of the Yeast Interactome Network journal October 2008
The Role of Mass Spectrometry in Structure Elucidation of Dynamic Protein Complexes journal June 2007
Mass Spectrometry in the Study of Hemoglobin: from Covalent Structure to Higher Order Assembly journal March 2006

Cited By (6)

Distinct Stabilities of the Structurally Homologous Heptameric Co-Chaperonins GroES and gp31 journal May 2018
Proteomics Is Analytical Chemistry: Fitness-for-Purpose in the Application of Top-Down and Bottom-Up Analyses journal December 2015
Radical solutions: Principles and application of electron-based dissociation in mass spectrometry-based analysis of protein structure journal February 2018
Structural mass spectrometry comes of age: new insight into protein structure, function and interactions journal January 2019
Diagnosis of Hemoglobinopathy and β-Thalassemia by 21 Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometry and Tandem Mass Spectrometry of Hemoglobin from Blood journal August 2019
Proteomics Is Analytical Chemistry: Fitness-for-Purpose in the Application of Top-Down and Bottom-Up Analyses journal December 2015