1
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Liang SY, Cua Estayan MI, Hsieh LW, Pan MC, Li KX, Chang HC, Peng WP. Real-Time Monitoring of the Evaporation and Fission of Electrospray-Ionized Polystyrene Beads and Bacterial Pellets at Elevated Temperatures. Anal Chem 2024; 96:7179-7186. [PMID: 38661266 DOI: 10.1021/acs.analchem.4c00763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
This study uses real-time monitoring, at microsecond time scales, with a charge-sensing particle detector to investigate the evaporation and fission processes of methanol/micrometer-sized polystyrene beads (PS beads) droplets and bacterial particles droplets generated via electrospray ionization (ESI) under elevated temperatures. By incrementally raising capillary temperatures, the solvent, such as methanol on 0.75 μm PS beads, experiences partial evaporation. Further temperature increase induces fission, and methanol molecules continue to evaporate until PS ions are detected after this range. Similar partial evaporation is observed on 3 μm PS beads. However, the shorter period of the fission temperature range is necessary compared to 0.75 μm PS beads. For the spherical-shaped bacterium, Staphylococcus aureus, the desolvation process shows a similar fission period as compared to 0.75 μm PS beads. Comparably, the rod-shaped bacteria, Escherichia coli EC11303, and E. coli strain W have shorter fission periods than S. aureus. This research provides insights into the evaporation and fission mechanisms of ESI droplets containing different sizes and shapes of micrometer-sized particles, contributing to a better understanding of gaseous macroion formation.
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Affiliation(s)
- Shao-Yu Liang
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien, Taiwan 97401
| | - Mhar Ian Cua Estayan
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien, Taiwan 97401
- Department of Mathematics and Physics, University of Santo Tomas, Manila 1008, Philippines
| | - Li-Wei Hsieh
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien, Taiwan 97401
| | - Meng-Cheng Pan
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien, Taiwan 97401
| | - Kai-Xiang Li
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien, Taiwan 97401
| | - Huan-Cheng Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan 10617
| | - Wen-Ping Peng
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien, Taiwan 97401
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2
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Sahin C, Leppert A, Landreh M. Advances in mass spectrometry to unravel the structure and function of protein condensates. Nat Protoc 2023; 18:3653-3661. [PMID: 37907762 DOI: 10.1038/s41596-023-00900-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/09/2023] [Indexed: 11/02/2023]
Abstract
Membrane-less organelles assemble through liquid-liquid phase separation (LLPS) of partially disordered proteins into highly specialized microenvironments. Currently, it is challenging to obtain a clear understanding of the relationship between the structure and function of phase-separated protein assemblies, owing to their size, dynamics and heterogeneity. In this Perspective, we discuss recent advances in mass spectrometry (MS) that offer several promising approaches for the study of protein LLPS. We survey MS tools that have provided valuable insights into other insoluble protein systems, such as amyloids, and describe how they can also be applied to study proteins that undergo LLPS. On the basis of these recent advances, we propose to integrate MS into the experimental workflow for LLPS studies. We identify specific challenges and future opportunities for the analysis of protein condensate structure and function by MS.
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Affiliation(s)
- Cagla Sahin
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet-Biomedicum, Solna, Sweden.
- Structural Biology and NMR laboratory and the Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen, Copenhagen, Denmark.
| | - Axel Leppert
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet-Biomedicum, Solna, Sweden
| | - Michael Landreh
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet-Biomedicum, Solna, Sweden.
- Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.
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3
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Depraz Depland A, Stroganova I, Wootton CA, Rijs AM. Developments in Trapped Ion Mobility Mass Spectrometry to Probe the Early Stages of Peptide Aggregation. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023; 34:193-204. [PMID: 36633834 PMCID: PMC9896548 DOI: 10.1021/jasms.2c00253] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/15/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
Ion mobility mass spectrometry (IM-MS) has proven to be an excellent method to characterize the structure of amyloidogenic protein and peptide aggregates, which are formed in coincidence with the development of neurodegenerative diseases. However, it remains a challenge to obtain detailed structural information on all conformational intermediates, originating from the early onset of those pathologies, due to their complex and heterogeneous environment. One way to enhance the insights and the identification of these early stage oligomers is by employing high resolution ion mobility mass spectrometry experiments. This would allow us to enhance the mobility separation and MS characterization. Trapped ion mobility spectrometry (TIMS) is an ion mobility technique known for its inherently high resolution and has successfully been applied to the analysis of protein conformations among others. To obtain conformational information on fragile peptide aggregates, the instrumental parameters of the TIMS-Quadrupole-Time-of-Flight mass spectrometer (TIMS-qToF-MS) have to be optimized to allow the study of intact aggregates and ensure their transmission toward the detector. Here, we investigate the suitability and application of TIMS to probe the aggregation process, targeting the well-characterized M307-N319 peptide segment of the TDP-43 protein, which is involved in the development of amyotrophic lateral sclerosis. By studying the influence of key parameters over the full mass spectrometer, such as source temperature, applied voltages or RFs among others, we demonstrate that by using an optimized instrumental method TIMS can be used to probe peptide aggregation.
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Affiliation(s)
- Agathe Depraz Depland
- Division
of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life
Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
| | - Iuliia Stroganova
- Division
of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life
Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
| | | | - Anouk M. Rijs
- Division
of Bioanalytical Chemistry, Amsterdam Institute of Molecular and Life
Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1105, 1081 HV Amsterdam, The Netherlands
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4
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Mass spectrometric insights into protein aggregation. Essays Biochem 2023; 67:243-253. [PMID: 36636963 PMCID: PMC10070474 DOI: 10.1042/ebc20220103] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/11/2022] [Accepted: 12/14/2022] [Indexed: 01/14/2023]
Abstract
Protein aggregation is now recognized as a generic and significant component of the protein energy landscape. Occurring through a complex and dynamic pathway of structural interconversion, the assembly of misfolded proteins to form soluble oligomers and insoluble aggregates remains a challenging topic of study, both in vitro and in vivo. Since the etiology of numerous human diseases has been associated with protein aggregation, and it has become a field of increasing importance in the biopharmaceutical industry, the biophysical characterization of protein misfolded states and their aggregation mechanisms continues to receive increased attention. Mass spectrometry (MS) has firmly established itself as a powerful analytical tool capable of both detection and characterization of proteins at all levels of structure. Given inherent advantages of biological MS, including high sensitivity, rapid timescales of analysis, and the ability to distinguish individual components from complex mixtures with unrivalled specificity, it has found widespread use in the study of protein aggregation, importantly, where traditional structural biology approaches are often not amenable. The present review aims to provide a brief overview of selected MS-based approaches that can provide a range of biophysical descriptors associated with protein conformation and the aggregation pathway. Recent examples highlight where this technology has provided unique structural and mechanistic understanding of protein aggregation.
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5
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Tsirkou A, Kaczorowski F, Verdurand M, Raffoul R, Pansieri J, Quadrio I, Chauveau F, Antoine R. Charge detection mass spectrometry on human-amplified fibrils from different synucleinopathies. Chem Commun (Camb) 2022; 58:7192-7195. [PMID: 35670578 DOI: 10.1039/d2cc00200k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amyloid fibrils are self-assembled mesoscopic protein aggregates, which can accumulate to form deposits or plaques in the brain. In vitro amplification of fibrils can be achieved with real-time quaking-induced conversion (RT-QuIC). However, this emerging technique would benefit from a complementary method to assess structural properties of the amplification products. This work demonstrates the feasibility of nanospray-charge-detection-mass-spectrometry (CDMS) performed on α-synuclein (αSyn) fibrils amplified from human brains with Parkinson's disease (PD) or Dementia with Lewy bodies (DLB) and its synergistic combination with RT-QuIC.
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Affiliation(s)
- Aikaterini Tsirkou
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Lyon, France.
| | - Flora Kaczorowski
- Laboratory of Neurobiology and Neurogenetics, Department of Biochemistry and Molecular Biology, Lyon University Hospital, 69677 BRON Cedex, France.,Center for Memory Resources and Research, Lyon University Hospital, Lyon 1 University, Villeurbanne, France.,Univ Lyon, Centre de Recherche en Neurosciences de Lyon, Equipe BIORAN, Inserm U1028 - CNRS UMR5292, Université Claude Bernard Lyon 1, Groupement Hospitalier Est - CERMEP, 69677 BRON Cedex, France.
| | - Mathieu Verdurand
- Laboratory of Neurobiology and Neurogenetics, Department of Biochemistry and Molecular Biology, Lyon University Hospital, 69677 BRON Cedex, France.,Center for Memory Resources and Research, Lyon University Hospital, Lyon 1 University, Villeurbanne, France.,Univ Lyon, Centre de Recherche en Neurosciences de Lyon, Equipe BIORAN, Inserm U1028 - CNRS UMR5292, Université Claude Bernard Lyon 1, Groupement Hospitalier Est - CERMEP, 69677 BRON Cedex, France.
| | - Rana Raffoul
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Lyon, France.
| | - Jonathan Pansieri
- Oxford University, Nuffield Department of Clinical Neurosciences, Oxford University, UK
| | - Isabelle Quadrio
- Laboratory of Neurobiology and Neurogenetics, Department of Biochemistry and Molecular Biology, Lyon University Hospital, 69677 BRON Cedex, France.,Center for Memory Resources and Research, Lyon University Hospital, Lyon 1 University, Villeurbanne, France.,Univ Lyon, Centre de Recherche en Neurosciences de Lyon, Equipe BIORAN, Inserm U1028 - CNRS UMR5292, Université Claude Bernard Lyon 1, Groupement Hospitalier Est - CERMEP, 69677 BRON Cedex, France.
| | - Fabien Chauveau
- Univ Lyon, Centre de Recherche en Neurosciences de Lyon, Equipe BIORAN, Inserm U1028 - CNRS UMR5292, Université Claude Bernard Lyon 1, Groupement Hospitalier Est - CERMEP, 69677 BRON Cedex, France.
| | - Rodolphe Antoine
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Lyon, France.
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6
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Abstract
Native mass spectrometry (MS) is aimed at preserving and determining the native structure, composition, and stoichiometry of biomolecules and their complexes from solution after they are transferred into the gas phase. Major improvements in native MS instrumentation and experimental methods over the past few decades have led to a concomitant increase in the complexity and heterogeneity of samples that can be analyzed, including protein-ligand complexes, protein complexes with multiple coexisting stoichiometries, and membrane protein-lipid assemblies. Heterogeneous features of these biomolecular samples can be important for understanding structure and function. However, sample heterogeneity can make assignment of ion mass, charge, composition, and structure very challenging due to the overlap of tens or even hundreds of peaks in the mass spectrum. In this review, we cover data analysis, experimental, and instrumental advances and strategies aimed at solving this problem, with an in-depth discussion of theoretical and practical aspects of the use of available deconvolution algorithms and tools. We also reflect upon current challenges and provide a view of the future of this exciting field.
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Affiliation(s)
- Amber D Rolland
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403-1253, United States
| | - James S Prell
- Department of Chemistry and Biochemistry, University of Oregon, Eugene, Oregon 97403-1253, United States.,Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1252, United States
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7
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Kharkov BB, Podkorytov IS, Bondarev SA, Belousov MV, Salikov VA, Zhouravleva GA, Skrynnikov NR. The Role of Rotational Motion in Diffusion NMR Experiments on Supramolecular Assemblies: Application to Sup35NM Fibrils. Angew Chem Int Ed Engl 2021; 60:15445-15451. [PMID: 33891789 DOI: 10.1002/anie.202102408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/19/2021] [Indexed: 11/08/2022]
Abstract
Pulsed-field gradient (PFG) NMR is an important tool for characterization of biomolecules and supramolecular assemblies. However, for micrometer-sized objects, such as amyloid fibrils, these experiments become difficult to interpret because in addition to translational diffusion they are also sensitive to rotational diffusion. We have constructed a mathematical theory describing the outcome of PFG NMR experiments on rod-like fibrils. To test its validity, we have studied the fibrils formed by Sup35NM segment of the prion protein Sup35. The interpretation of the PFG NMR data in this system is fully consistent with the evidence from electron microscopy. Contrary to some previously expressed views, the signals originating from disordered regions in the fibrils can be readily differentiated from the similar signals representing small soluble species (e.g. proteolytic fragments). This paves the way for diffusion-sorted NMR experiments on complex amyloidogenic samples.
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Affiliation(s)
- Boris B Kharkov
- Laboratory of Biomolecular NMR, St. Petersburg State University, 199034, St. Petersburg, Russia
| | - Ivan S Podkorytov
- Laboratory of Biomolecular NMR, St. Petersburg State University, 199034, St. Petersburg, Russia
| | - Stanislav A Bondarev
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034, St. Petersburg, Russia
| | - Mikhail V Belousov
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034, St. Petersburg, Russia.,Laboratory for Proteomics of Supra-Organismal Systems, All-Russia Research Institute for Agricultural Microbiology (ARRIAM), 196608, St. Petersburg, Russia
| | - Vladislav A Salikov
- Laboratory of Biomolecular NMR, St. Petersburg State University, 199034, St. Petersburg, Russia
| | - Galina A Zhouravleva
- Department of Genetics and Biotechnology, St. Petersburg State University, 199034, St. Petersburg, Russia
| | - Nikolai R Skrynnikov
- Laboratory of Biomolecular NMR, St. Petersburg State University, 199034, St. Petersburg, Russia.,Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA
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8
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Kharkov BB, Podkorytov IS, Bondarev SA, Belousov MV, Salikov VA, Zhouravleva GA, Skrynnikov NR. The Role of Rotational Motion in Diffusion NMR Experiments on Supramolecular Assemblies: Application to Sup35NM Fibrils. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Boris B. Kharkov
- Laboratory of Biomolecular NMR St. Petersburg State University 199034 St. Petersburg Russia
| | - Ivan S. Podkorytov
- Laboratory of Biomolecular NMR St. Petersburg State University 199034 St. Petersburg Russia
| | - Stanislav A. Bondarev
- Department of Genetics and Biotechnology St. Petersburg State University 199034 St. Petersburg Russia
| | - Mikhail V. Belousov
- Department of Genetics and Biotechnology St. Petersburg State University 199034 St. Petersburg Russia
- Laboratory for Proteomics of Supra-Organismal Systems All-Russia Research Institute for Agricultural Microbiology (ARRIAM) 196608 St. Petersburg Russia
| | - Vladislav A. Salikov
- Laboratory of Biomolecular NMR St. Petersburg State University 199034 St. Petersburg Russia
| | - Galina A. Zhouravleva
- Department of Genetics and Biotechnology St. Petersburg State University 199034 St. Petersburg Russia
| | - Nikolai R. Skrynnikov
- Laboratory of Biomolecular NMR St. Petersburg State University 199034 St. Petersburg Russia
- Department of Chemistry Purdue University West Lafayette IN 47907 USA
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9
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Bai Y, Wan W, Huang Y, Jin W, Lyu H, Xia Q, Dong X, Gao Z, Liu Y. Quantitative interrogation of protein co-aggregation using multi-color fluorogenic protein aggregation sensors. Chem Sci 2021; 12:8468-8476. [PMID: 34221329 PMCID: PMC8221170 DOI: 10.1039/d1sc01122g] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/19/2021] [Indexed: 12/27/2022] Open
Abstract
Co-aggregation of multiple pathogenic proteins is common in neurodegenerative diseases but deconvolution of such biochemical process is challenging. Herein, we developed a dual-color fluorogenic thermal shift assay to simultaneously report on the aggregation of two different proteins and quantitatively study their thermodynamic stability during co-aggregation. Expansion of spectral coverage was first achieved by developing multi-color fluorogenic protein aggregation sensors. Orthogonal detection was enabled by conjugating sensors of minimal fluorescence crosstalk to two different proteins via sortase-tag technology. Using this assay, we quantified shifts in melting temperatures in a heterozygous model protein system, revealing that the thermodynamic stability of wild-type proteins was significantly compromised by the mutant ones but not vice versa. We also examined how small molecule ligands selectively and differentially interfere with such interplay. Finally, we demonstrated these sensors are suited to visualize how different proteins exert influence on each other upon their co-aggregation in live cells.
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Affiliation(s)
- Yulong Bai
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wang Wan
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Yanan Huang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Wenhan Jin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Haochen Lyu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
| | - Qiuxuan Xia
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Xuepeng Dong
- The Second Hospital of Dalian Medical University 467 Zhongshan Road Dalian 116044 China
| | - Zhenming Gao
- The Second Hospital of Dalian Medical University 467 Zhongshan Road Dalian 116044 China
| | - Yu Liu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China
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10
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Gustafson EL, Murray HV, Caldwell T, Austin DE. Accurately Mapping Image Charge and Calibrating Ion Velocity in Charge Detection Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:2161-2170. [PMID: 32856905 DOI: 10.1021/jasms.0c00263] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Image charge detection is the foundation of charge detection mass spectrometry (CDMS). The mass-to-charge ratio, m/z, of a highly charged ion or particle is determined by measuring the particle's charge and velocity. Charge is typically determined from a calibrated image charge signal, and the particle velocity is calculated using the peaks from the shaped signal as they relate to the particle position and time-of-flight through a detector of known length. Although much has been done to improve the charge accuracy in CDMS, little has been done to address the inconsistencies in the particle velocity measurements and the interpretation of peak position and effective electrode length. In this work, we combine SIMION ion trajectory software and the Shockley-Ramo theorem to accurately determine the effective electrode length, peak position, and shape of the signal peaks. Six model charge detector geometries were examined with this method and evaluated in laboratory experiments. Experimental results in all cases agreed with the simulations. Using a charge detector with multiple, 12.7 mm-long cylindrical electrodes, experimental velocities across and between electrodes agreed within 0.25% relative standard deviation (RSD) when this method was used to correct for effective electrode lengths, corresponding to an uncertainty in the effective electrode length of only 40 μm. For a detector with multiple electrodes and varied electrode spacing, experiments showed that the peak amplitude and shape vary with the geometry and with the particle path through the detector, whereas all peak areas agreed to within 2.3% RSD. For a charge detector made of two printed circuit boards, the velocities agreed within 0.44% RSD using the calculated effective electrode length.
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Affiliation(s)
- Elaura L Gustafson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Halle V Murray
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Tabitha Caldwell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Daniel E Austin
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
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11
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Todd AR, Barnes LF, Young K, Zlotnick A, Jarrold MF. Higher Resolution Charge Detection Mass Spectrometry. Anal Chem 2020; 92:11357-11364. [PMID: 32806905 PMCID: PMC8587657 DOI: 10.1021/acs.analchem.0c02133] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Charge detection mass spectrometry is a single particle technique where the masses of individual ions are determined from simultaneous measurements of each ion's m/z ratio and charge. The ions pass through a conducting cylinder, and the charge induced on the cylinder is detected. The cylinder is usually placed inside an electrostatic linear ion trap so that the ions oscillate back and forth through the cylinder. The resulting time domain signal is analyzed by fast Fourier transformation; the oscillation frequency yields the m/z, and the charge is determined from the magnitudes. The mass resolving power depends on the uncertainties in both quantities. In previous work, the mass resolving power was modest, around 30-40. In this work we report around an order of magnitude improvement. The improvement was achieved by coupling high-accuracy charge measurements (obtained with dynamic calibration) with higher resolution m/z measurements. The performance was benchmarked by monitoring the assembly of the hepatitis B virus (HBV) capsid. The HBV capsid assembly reaction can result in a heterogeneous mixture of intermediates extending from the capsid protein dimer to the icosahedral T = 4 capsid with 120 dimers. Intermediates of all possible sizes were resolved, as well as some overgrown species. Despite the improved mass resolving power, the measured peak widths are still dominated by instrumental resolution. Heterogeneity makes only a small contribution. Resonances were observed in some of the m/z spectra. They result from ions with different masses and charges having similar m/z values. Analogous resonances are expected whenever the sample is a heterogeneous mixture assembled from a common building block.
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12
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Antoine R. Weighing synthetic polymers of ultra-high molar mass and polymeric nanomaterials: What can we learn from charge detection mass spectrometry? RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34 Suppl 2:e8539. [PMID: 31353622 DOI: 10.1002/rcm.8539] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
Advances in soft ionization techniques for mass spectrometry (MS) of polymeric materials make it possible to determine the masses of intact molecular ions exceeding megadaltons. Interfacing MS with separation and fragmentation methods has additionally led to impressive advances in the ability to structurally characterize polymers. Even if the gap to the megadalton range has been bridged by MS for polymers standards, the MS-based analysis for more complex polymeric materials is still challenging. Charge detection mass spectrometry (CDMS) is a single-molecule method where the mass and the charge of each ion are directly determined from individual measurements. The entire molecular mass distribution of a polymer sample can be thus accurately measured. Described in this perspective paper is how molecular weight distribution as well as charge distribution can provide new insights into the structural and compositional studies of synthetic polymers and polymeric nanomaterials in the megadalton to gigadalton range of molecular weight. The recent multidimensional CDMS studies involving couplings with separation and dissociation techniques will be presented. And, finally, an outlook for the future avenues of the CDMS technique in the field of synthetic polymers of ultra-high molar mass and polymeric nanomaterials will be provided.
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Affiliation(s)
- Rodolphe Antoine
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR 5306, F-69622, Lyon, France
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13
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Sansa M, Defoort M, Brenac A, Hermouet M, Banniard L, Fafin A, Gely M, Masselon C, Favero I, Jourdan G, Hentz S. Optomechanical mass spectrometry. Nat Commun 2020; 11:3781. [PMID: 32728047 PMCID: PMC7391691 DOI: 10.1038/s41467-020-17592-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 07/01/2020] [Indexed: 12/20/2022] Open
Abstract
Nanomechanical mass spectrometry has proven to be well suited for the analysis of high mass species such as viruses. Still, the use of one-dimensional devices such as vibrating beams forces a trade-off between analysis time and mass resolution. Complex readout schemes are also required to simultaneously monitor multiple resonance modes, which degrades resolution. These issues restrict nanomechanical MS to specific species. We demonstrate here single-particle mass spectrometry with nano-optomechanical resonators fabricated with a Very Large Scale Integration process. The unique motion sensitivity of optomechanics allows designs that are impervious to particle position, stiffness or shape, opening the way to the analysis of large aspect ratio biological objects of great significance such as viruses with a tail or fibrils. Compared to top-down beam resonators with electrical read-out and state-of-the-art mass resolution, we show a three-fold improvement in capture area with no resolution degradation, despite the use of a single resonance mode. The use of one dimensional devices in nanomechanical mass spectrometry leads to a trade-off between analysis time and resolution. Here, the authors report single-particle mass spectrometry using integrated optomechanical resonators, impervious to particle position, stiffness or shape.
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Affiliation(s)
- Marc Sansa
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Martial Defoort
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France.,Université Grenoble Alpes, CNRS, Grenoble INP, TIMA, 38000, Grenoble, France
| | - Ariel Brenac
- Université Grenoble Alpes, CEA, CNRS, Grenoble INP, IRIG-Spintec, 38000, Grenoble, France
| | - Maxime Hermouet
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Louise Banniard
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Alexandre Fafin
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Marc Gely
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Christophe Masselon
- CEA, IRIG, Biologie à Grande Echelle, F-38054, Grenoble, France.,Inserm, Unité 1038, F-38054, Grenoble, France
| | - Ivan Favero
- Matériaux et Phénomènes Quantiques, CNRS UMR 7162, Université de Paris, 75013, Paris, France
| | | | - Sébastien Hentz
- Université Grenoble Alpes, CEA, LETI, 38000, Grenoble, France.
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14
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Pansieri J, Iashchishyn IA, Fakhouri H, Ostojić L, Malisauskas M, Musteikyte G, Smirnovas V, Schneider MM, Scheidt T, Xu CK, Meisl G, Knowles TPJ, Gazit E, Antoine R, Morozova-Roche LA. Templating S100A9 amyloids on Aβ fibrillar surfaces revealed by charge detection mass spectrometry, microscopy, kinetic and microfluidic analyses. Chem Sci 2020; 11:7031-7039. [PMID: 34122996 PMCID: PMC8159403 DOI: 10.1039/c9sc05905a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 06/16/2020] [Indexed: 12/16/2022] Open
Abstract
The mechanism of amyloid co-aggregation and its nucleation process are not fully understood in spite of extensive studies. Deciphering the interactions between proinflammatory S100A9 protein and Aβ42 peptide in Alzheimer's disease is fundamental since inflammation plays a central role in the disease onset. Here we use innovative charge detection mass spectrometry (CDMS) together with biophysical techniques to provide mechanistic insight into the co-aggregation process and differentiate amyloid complexes at a single particle level. Combination of mass and charge distributions of amyloids together with reconstruction of the differences between them and detailed microscopy reveals that co-aggregation involves templating of S100A9 fibrils on the surface of Aβ42 amyloids. Kinetic analysis further corroborates that the surfaces available for the Aβ42 secondary nucleation are diminished due to the coating by S100A9 amyloids, while the binding of S100A9 to Aβ42 fibrils is validated by a microfluidic assay. We demonstrate that synergy between CDMS, microscopy, kinetic and microfluidic analyses opens new directions in interdisciplinary research.
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Affiliation(s)
- Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Hussein Fakhouri
- Institut Lumière Matière, UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon F-69100 Villeurbanne France
| | - Lucija Ostojić
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Mantas Malisauskas
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
| | - Greta Musteikyte
- Institute of Biotechnology, Life Sciences Center, Vilnius University Vilnius Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University Vilnius Lithuania
| | - Matthias M Schneider
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Tom Scheidt
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Catherine K Xu
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Georg Meisl
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
| | - Tuomas P J Knowles
- Centre for Misfolding Diseases, Department of Chemistry, University of Cambridge Lensfield Road Cambridge CB2 1EW UK
- Cavendish Laboratory, Department of Physics, University of Cambridge JJ Thompson Ave CB3 0HE Cambridge UK
| | - Ehud Gazit
- Department of Medical Biochemistry and Biophysics, Umeå University SE-90187 Umeå Sweden
- School of Molecular Cell Biology and Biotechnology, Tel Aviv University Tel Aviv 69978 Israel
| | - Rodolphe Antoine
- Institut Lumière Matière, UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon F-69100 Villeurbanne France
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15
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Todd AR, Jarrold MF. Dynamic Calibration Enables High-Accuracy Charge Measurements on Individual Ions for Charge Detection Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:1241-1248. [PMID: 32353231 DOI: 10.1021/jasms.0c00081] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Charge detection mass spectrometry (CDMS) depends on the measurement of the charge induced on a cylinder by individual ions by means of a charge-sensitive amplifier. For high-accuracy charge measurements, the detection cylinder is embedded in an electrostatic linear ion trap (ELIT), and the ions oscillate back and forth through the cylinder so that multiple measurements are made. To assign the charge state with a low error rate, the charge of each ion must be determined with an uncertainty (root-mean-square deviation) of around 0.2 elementary charges. We show here that high-accuracy charge measurements can be achieved for large ions by dynamic calibration of the charge measurement using an internal standard. The internal standard is generated by irradiating the detection cylinder, by means of a small antenna, with a radiofrequency signal. Using this approach, we have obtained a relative charge uncertainty of around 5 × 10-4, allowing charge-state resolution to be achieved for single ions with up to 500 charges. In another application of this approach, the detection cylinder is irradiated with a signal that counteracts the transients generated when the potentials on the ELIT end-caps are switched to trapping mode. Using this approach, the dead time after switching (during which the signal cannot be analyzed) has been reduced by more than an order of magnitude. With charge-state resolution for ions with up to 500 charges, we were able to calibrate the charges precisely. The results show that the response of the charge-sensitive amplifier with dynamic calibration is linear to within a small fraction of an elementary charge.
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Affiliation(s)
- Aaron R Todd
- Chemistry Department, Indiana University, Bloomington, Indiana 47405 United States
| | - Martin F Jarrold
- Chemistry Department, Indiana University, Bloomington, Indiana 47405 United States
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16
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Exploring the structure and dynamics of macromolecular complexes by native mass spectrometry. J Proteomics 2020; 222:103799. [DOI: 10.1016/j.jprot.2020.103799] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 03/23/2020] [Accepted: 04/25/2020] [Indexed: 12/15/2022]
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17
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Russier-Antoine I, Fakhouri H, Basu S, Bertorelle F, Dugourd P, Brevet PF, Velayudhan P, Thomas S, Kalarikkal N, Antoine R. Second harmonic scattering from mass characterized 2D graphene oxide sheets. Chem Commun (Camb) 2020; 56:3859-3862. [PMID: 32134076 DOI: 10.1039/d0cc00111b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In this communication, we report the second harmonic scattering from mass characterized 2D graphene oxide sheets dispersed in an aqueous suspension, in the femtosecond regime at 800 nm laser excitation. Charge-detection mass-spectrometry, performing at the single sheet level, allows for an exhaustive molar mass distribution and thus concentration for these 2D nanomaterials samples. The orientation-averaged hyperpolarizability value is (1.36 ± 0.15) × 10-25 esu as determined by the concentration-dependent harmonic scattering signal. In addition, the multi-photon excited fluorescence spectrum is characterized by a broad band in the visible range between 350 and 700 nm centered at about 500 nm.
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Affiliation(s)
- Isabelle Russier-Antoine
- Institut Lumière Matière UMR 5306, Université Claude Bernard Lyon 1, CNRS, Univ Lyon, F-69100 Villeurbanne, France.
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18
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Resolving heterogeneous macromolecular assemblies by Orbitrap-based single-particle charge detection mass spectrometry. Nat Methods 2020; 17:395-398. [DOI: 10.1038/s41592-020-0770-7] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 02/05/2020] [Indexed: 12/28/2022]
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19
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Bond KM, Lyktey NA, Tsvetkova IB, Dragnea B, Jarrold MF. Disassembly Intermediates of the Brome Mosaic Virus Identified by Charge Detection Mass Spectrometry. J Phys Chem B 2020; 124:2124-2131. [PMID: 32141748 DOI: 10.1021/acs.jpcb.0c00008] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Capsid disassembly and genome release are critical steps in the lifecycle of a virus. However, their mechanisms are poorly understood, both in vivo and in vitro. Here, we have identified two in vitro disassembly pathways of the brome mosaic virus (BMV) by charge detection mass spectrometry and transmission electron microscopy. When subjected to a pH jump to a basic environment at low ionic strength, protein-RNA interactions are disrupted. Under these conditions, BMV appears to disassemble mainly through a global cleavage event into two main fragments: a near complete capsid that has released the RNA and the released RNA complexed to a small number of the capsid proteins. Upon slow buffer exchange to remove divalent cations at neutral pH, capsid protein interactions are disrupted. The BMV virions swell but there is no measurable loss of the RNA. Some of the virions break into small fragments, leading to an increase in the abundance of species with masses less than 1 MDa. The peak attributed to the BMV virion shifts to a higher mass with time. The mass increase is attributed to additional capsid proteins associating with the disrupted capsid protein-RNA complex, where the RNA is presumably partially exposed. It is likely that this pathway is more closely related to how the capsid disassembles in vivo, as it offers the advantage of protecting the RNA with the capsid protein until translation begins.
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Affiliation(s)
- Kevin M Bond
- Chemistry Department, Indiana University, 800 E Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Nicholas A Lyktey
- Chemistry Department, Indiana University, 800 E Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Irina B Tsvetkova
- Chemistry Department, Indiana University, 800 E Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Bogdan Dragnea
- Chemistry Department, Indiana University, 800 E Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Martin F Jarrold
- Chemistry Department, Indiana University, 800 E Kirkwood Avenue, Bloomington, Indiana 47405, United States
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20
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Brown BA, Zeng X, Todd AR, Barnes LF, Winstone JMA, Trinidad JC, Novotny MV, Jarrold MF, Clemmer DE. Charge Detection Mass Spectrometry Measurements of Exosomes and other Extracellular Particles Enriched from Bovine Milk. Anal Chem 2020; 92:3285-3292. [PMID: 31989813 PMCID: PMC7236431 DOI: 10.1021/acs.analchem.9b05173] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The masses of particles in a bovine milk extracellular vesicle (EV) preparation enriched for exosomes were directly determined for the first time by charge detection mass spectrometry (CDMS). In CDMS, both the mass-to-charge ratio (m/z) and z are determined simultaneously for individual particles, enabling mass determinations for particles that are far beyond the mass limit (∼1.0 MDa) of conventional mass spectrometry (MS). Particle masses and charges span a wide range from m ∼ 2 to ∼90 MDa and z ∼ 50 to ∼1300 e (elementary charges) and are highly dependent upon the conditions used to extract and isolate the EVs. EV particles span a continuum of masses, reflecting the highly heterogeneous nature of these samples. However, evidence for unique populations of particles is obtained from correlation of the charges and masses. An analysis that uses a two-dimensional Gaussian model, provides evidence for six families of particles, four of which having masses in the range expected for exosomes. Complementary proteomics measurements and electron microscopy (EM) imaging are used to further characterize the EVs and confirm that these samples have been enriched in exosomes. The ability to characterize such extremely heterogeneous mixtures of large particles with rapid, sensitive, and high-resolution MS techniques is critical to ongoing analytical efforts to separate and purify exosomes and exosome subpopulations. Direct measurement of each particle's mass and charge is a new means of characterizing the physical and chemical properties of exosomes and other EVs.
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Affiliation(s)
- Brooke A Brown
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Xuyao Zeng
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Aaron R Todd
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Lauren F Barnes
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Jonathan M A Winstone
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Jonathan C Trinidad
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Milos V Novotny
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - Martin F Jarrold
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
| | - David E Clemmer
- Department of Chemistry , Indiana University , Bloomington , Indiana 47505 , United States
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21
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Todd AR, Alexander AW, Jarrold MF. Implementation of a Charge-Sensitive Amplifier without a Feedback Resistor for Charge Detection Mass Spectrometry Reduces Noise and Enables Detection of Individual Ions Carrying a Single Charge. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2020; 31:146-154. [PMID: 32881508 DOI: 10.1021/jasms.9b00010] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Charge detection mass spectrometry (CDMS) depends on the measurement of the charge induced on a cylinder by individual ions by means of a charge-sensitive amplifier. Electrical noise limits the accuracy of the charge measurement and the smallest charge that can be detected. Thermal noise in the feedback resistor is a major source of electrical noise. We describe the implementation of a charge-sensitive amplifier without a feedback resistor. The design has significantly reduced 1/f noise facilitating the detection of high m/z ions and substantially reducing the measurement time required to achieve almost perfect charge accuracy. With the new design we have been able to detect individual ions carrying a single charge. This is an important milestone in the development of CDMS.
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Affiliation(s)
- Aaron R Todd
- Chemistry Department, Indiana University, Bloomington, Indiana 47405, United States
| | - Andrew W Alexander
- Chemistry Department, Indiana University, Bloomington, Indiana 47405, United States
| | - Martin F Jarrold
- Chemistry Department, Indiana University, Bloomington, Indiana 47405, United States
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22
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Botamanenko DY, Jarrold MF. Ion-Ion Interactions in Charge Detection Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:2741-2749. [PMID: 31677069 PMCID: PMC7487123 DOI: 10.1007/s13361-019-02343-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/16/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
Charge detection mass spectrometry (CDMS) is a single-particle technique where the masses of individual ions are determined by simultaneously measuring their mass-to-charge ratio (m/z) and charge. Ions are usually trapped inside an electrostatic linear ion trap (ELIT) where they oscillate back and forth through a detection cylinder, generating a periodic signal that is analyzed by fast Fourier transforms. The oscillation frequency is related to the ion's m/z, and the magnitude is related to the ion's charge. In early work, multiple ion trapping events were discarded because there was a question about whether ion-ion interactions affected the results. Here, we report trajectory calculations performed to assess the influence of ion-ion interactions when multiple highly charged ions are simultaneously trapped in an ELIT. Ion-ion interactions cause trajectory and energy fluctuations that lead to variations in the oscillation frequencies that in turn degrade the precision and accuracy of the m/z measurements. The peak shapes acquire substantial high and low m/z tails, and the average m/z shifts to a higher value as the number of trapped ions increases. The effects of the ion-ion interactions are proportional to the product of the charges and the square root of the number of trapped ions and depend on the ions' m/z distribution. For the ELIT design examined here, ion-ion interactions limit the m/z resolving power to several hundred for a typical homogeneous ion population.
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Affiliation(s)
- Daniel Y Botamanenko
- Chemistry Department, Indiana University, 800 E Kirkwood Ave, Bloomington, IN, 47405, USA
| | - Martin F Jarrold
- Chemistry Department, Indiana University, 800 E Kirkwood Ave, Bloomington, IN, 47405, USA.
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23
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Todd AR, Jarrold MF. Dramatic Improvement in Sensitivity with Pulsed Mode Charge Detection Mass Spectrometry. Anal Chem 2019; 91:14002-14008. [PMID: 31589418 PMCID: PMC6834878 DOI: 10.1021/acs.analchem.9b03586] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Charge detection mass spectrometry (CDMS) is emerging as a valuable tool to determine mass distributions for heterogeneous and high-mass samples. It is a single-particle technique where masses are determined for individual ions from simultaneous measurements of their mass-to-charge ratio (m/z) and charge. Ions are trapped in an electrostatic linear ion trap (ELIT) and oscillate back and forth through a detection cylinder. The trap is open and able to trap ions for a small fraction of the total measurement time so most of the ions (>99.8%) in a continuous ion beam are lost. Here, we implement an ion storage scheme where ions are accumulated and stored in a hexapole and then injected into the ELIT at the right time for them to be trapped. This pulsed mode of operation increases the sensitivity of CDMS by more than 2 orders of magnitude, which allows much lower titer samples to be analyzed. A limit of detection of 3.3 × 108 particles/mL was obtained for hepatitis B virus T = 4 capsids with a 1.3 μL sample. The hexapole where the ions are accumulated and stored is a significant distance from the ion trap so ions are dispersed in time by their m/z values as they travel between the hexapole and the ELIT. By varying the delay time between ion release and trapping, different windows of m/z values can be trapped.
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Affiliation(s)
- Aaron R. Todd
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Martin F. Jarrold
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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24
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Iadanza MG, Jackson MP, Hewitt EW, Ranson NA, Radford SE. A new era for understanding amyloid structures and disease. Nat Rev Mol Cell Biol 2019; 19:755-773. [PMID: 30237470 DOI: 10.1038/s41580-018-0060-8] [Citation(s) in RCA: 569] [Impact Index Per Article: 113.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The aggregation of proteins into amyloid fibrils and their deposition into plaques and intracellular inclusions is the hallmark of amyloid disease. The accumulation and deposition of amyloid fibrils, collectively known as amyloidosis, is associated with many pathological conditions that can be associated with ageing, such as Alzheimer disease, Parkinson disease, type II diabetes and dialysis-related amyloidosis. However, elucidation of the atomic structure of amyloid fibrils formed from their intact protein precursors and how fibril formation relates to disease has remained elusive. Recent advances in structural biology techniques, including cryo-electron microscopy and solid-state NMR spectroscopy, have finally broken this impasse. The first near-atomic-resolution structures of amyloid fibrils formed in vitro, seeded from plaque material and analysed directly ex vivo are now available. The results reveal cross-β structures that are far more intricate than anticipated. Here, we describe these structures, highlighting their similarities and differences, and the basis for their toxicity. We discuss how amyloid structure may affect the ability of fibrils to spread to different sites in the cell and between organisms in a prion-like manner, along with their roles in disease. These molecular insights will aid in understanding the development and spread of amyloid diseases and are inspiring new strategies for therapeutic intervention.
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Affiliation(s)
- Matthew G Iadanza
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Matthew P Jackson
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Eric W Hewitt
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Neil A Ranson
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK.
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25
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Dunbar CA, Rayaprolu V, Wang JCY, Brown CJ, Leishman E, Jones-Burrage S, Trinidad JC, Bradshaw HB, Clemmer DE, Mukhopadhyay S, Jarrold MF. Dissecting the Components of Sindbis Virus from Arthropod and Vertebrate Hosts: Implications for Infectivity Differences. ACS Infect Dis 2019; 5:892-902. [PMID: 30986033 DOI: 10.1021/acsinfecdis.8b00356] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Sindbis virus (SINV) is an enveloped, single-stranded RNA virus, which is transmitted via mosquitos to a wide range of vertebrate hosts. SINV produced by vertebrate, baby hamster kidney (BHK) cells is more than an order of magnitude less infectious than SINV produced from mosquito (C6/36) cells. The cause of this difference is poorly understood. In this study, charge detection mass spectrometry was used to determine the masses of intact SINV particles isolated from BHK and C6/36 cells. The measured masses are substantially different: 52.88 MDa for BHK derived SINV and 50.69 MDa for C6/36 derived. Further analysis using several mass spectrometry-based methods and biophysical approaches indicates that BHK derived SINV has a substantially higher mass than C6/36 derived because in the lipid bilayer, there is a higher portion of lipids containing long chain fatty acids. The difference in lipid composition could influence the organization of the lipid bilayer. As a result, multiple stages of the viral lifecycle may be affected including assembly and budding, particle stability during transmission, and fusion events, all of which could contribute to the differences in infectivity.
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Affiliation(s)
- Carmen A. Dunbar
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Vamseedhar Rayaprolu
- Department of Biology, Indiana University, Jordan Hall, 1001 East Third Street, Bloomington, Indiana 47405, United States
| | - Joseph C.-Y. Wang
- Department of Molecular and Cellular Biochemistry, Indiana University, Simon Hall, 212 South Hawthorne Drive, Bloomington, Indiana 47405, United States
| | - Christopher J. Brown
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Emma Leishman
- Department of Psychological and Brain Sciences, Indiana University, 1101 East Tenth Street, Bloomington, Indiana 47405, United States
| | - Sara Jones-Burrage
- Department of Biology, Indiana University, Jordan Hall, 1001 East Third Street, Bloomington, Indiana 47405, United States
| | - Jonathan C. Trinidad
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Heather B. Bradshaw
- Department of Psychological and Brain Sciences, Indiana University, 1101 East Tenth Street, Bloomington, Indiana 47405, United States
| | - David E. Clemmer
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Suchetana Mukhopadhyay
- Department of Biology, Indiana University, Jordan Hall, 1001 East Third Street, Bloomington, Indiana 47405, United States
| | - Martin F. Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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26
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Draper BE, Jarrold MF. Real-Time Analysis and Signal Optimization for Charge Detection Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:898-904. [PMID: 30993638 DOI: 10.1007/s13361-019-02172-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/23/2019] [Accepted: 02/23/2019] [Indexed: 06/09/2023]
Abstract
Charge detection mass spectrometry (CDMS) is an important tool for measuring mass distributions for high mass samples and heterogeneous mixtures. In CDMS, single ions are trapped and their m/z and charge are measured simultaneously. As a single particle technique, the average signal must be optimized to maximize the number of single ion trapping events. If the average signal is too small, most of the trapping events will be empty, and if the average signal is too large, most of the trapping events will contain multiple ions. In recent embodiments, the time domain signal from the trapped ion is analyzed by fast Fourier transforms. The analysis time is much longer that the data collection time which precludes real-time optimization of the experimental conditions. In this paper, we describe the implementation of CDMS with real-time analysis. Processing the data in real time allows the average signal intensities to be dynamically optimized to maximize the number of single ion trapping events. Real-time analysis also allows the experimental settings to be optimized in a timely manner to target specific mass regimes to maximize the useful information content of the measurements. Graphical Abstract .
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Affiliation(s)
- Benjamin E Draper
- Chemistry Department, Indiana University, 800 E Kirkwood Ave, Bloomington, IN, 47405, USA
| | - Martin F Jarrold
- Chemistry Department, Indiana University, 800 E Kirkwood Ave, Bloomington, IN, 47405, USA.
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27
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Elliott AG, Harper CC, Lin HW, Williams ER. Effects of Individual Ion Energies on Charge Measurements in Fourier Transform Charge Detection Mass Spectrometry (FT-CDMS). JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2019; 30:946-955. [PMID: 30430436 DOI: 10.1007/s13361-018-2094-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/15/2018] [Accepted: 10/15/2018] [Indexed: 06/09/2023]
Abstract
A method to correct for the effect of ion energy on charge measurements of individual ions trapped and weighed with charge detection mass spectrometry (CDMS) is demonstrated. Ions with different energies induce different signal patterns inside an electrostatic ion trap. The sum of the amplitudes of the fundamental and second harmonic frequencies in the Fourier transform of the induced signal, which has been used to obtain the ion charge, depends on both ion energy and charge. The amplitudes of the fundamental frequencies of ions increase over time as ions lose energy by collisions with background gas and solvent loss from larger ions. Model ion signals are simulated with the same time-domain amplitude at different energies and frequencies and the resulting fundamental frequency amplitudes are used to normalize real ion signals for energy and frequency effects. The fundamental frequency amplitude decreases dramatically below 20 kHz and increases by ~ 17% from the highest energy to lowest energy that is stable with a given trap potential at all frequencies. Normalizing the fundamental frequency amplitude with the modeled amplitudes removes the systematic changes in the charge measurement of polyethylene glycol (PEG) and other ions and makes it possible to signal average the amplitude over long times, which reduces the charge uncertainty to 0.04% for a PEG ion for a 500-ms measurement. This method improves charge measurement accuracy and uncertainty, which are important for high-accuracy mass measurement with CDMS. Graphical abstract ᅟ.
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Affiliation(s)
- Andrew G Elliott
- Department of Chemistry, University of California, Berkeley, CA, 94720-1460, USA
| | - Conner C Harper
- Department of Chemistry, University of California, Berkeley, CA, 94720-1460, USA
| | - Haw-Wei Lin
- Department of Chemistry, University of California, Berkeley, CA, 94720-1460, USA
| | - Evan R Williams
- Department of Chemistry, University of California, Berkeley, CA, 94720-1460, USA.
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28
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Harper CC, Elliott AG, Oltrogge LM, Savage DF, Williams ER. Multiplexed Charge Detection Mass Spectrometry for High-Throughput Single Ion Analysis of Large Molecules. Anal Chem 2019; 91:7458-7465. [PMID: 31082222 DOI: 10.1021/acs.analchem.9b01669] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Applications of charge detection mass spectrometry (CDMS) for measuring the masses of large molecules, macromolecular complexes, and synthetic polymers that are too large or heterogeneous for conventional mass spectrometry measurements are made possible by weighing individual ions in order to avoid interferences between ions. Here, a new multiplexing method that makes it possible to measure the masses of many ions simultaneously in CDMS is demonstrated. Ions with a broad range of kinetic energies are trapped. The energy of each ion is obtained from the ratio of the intensity of the fundamental to the second harmonic frequencies of the periodic trapping motion making it possible to measure both the m/ z and charge of each ion. Because ions with the exact same m/ z but with different energies appear at different frequencies, the probability of ion-ion interference is significantly reduced. We show that the measured mass of a protein complex consisting of 16 protomers, RuBisCO (517 kDa), is not affected by the number of trapped ions with up to 21 ions trapped simultaneously in these experiments. Ion-ion interactions do not affect the ion trapping lifetime up to 1 s, and there is no influence of the number of ions on the measured charge-state distribution of bovine serum albumin (66.5 kDa), indicating that ion-ion interactions do not adversely affect any of these measurements. Over an order of magnitude gain in measurement speed over single ion analysis is demonstrated, and significant additional gains are expected with this multi-ion measurement method.
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29
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Halim MA, Bertorelle F, Doussineau T, Antoine R. Direct determination of molecular weight distribution of calf-thymus DNAs and study of their fragmentation under ultrasonic and low-energy infrared irradiations. A charge detection mass spectrometry investigation. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2019; 33 Suppl 1:35-39. [PMID: 29885254 DOI: 10.1002/rcm.8204] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
RATIONALE Calf-thymus (CT-DNA) is widely used as a binding agent. The commercial samples are known to be "highly polymerized DNA" samples. CT-DNA is known to be fragile in particular upon ultrasonic wave irradiation. Degradation products could have dramatic consequences on its bio-sensing activity, and an accurate determination of the molecular weight distribution and stability of commercial samples is highly demanded. METHODS We investigated the sensitivity of charge detection mass spectrometry (CDMS), a single-molecule MS method, both with single-pass and ion trap CDMS ("Benner" trap) modes to the determination of the composition and stability (under multiphoton IR irradiation) of calf-thymus DNAs. We also investigated the changes in molecular weight distributions in the course of sonication by irradiating ultrasonic waves to CT-DNA. RESULTS We report, for the first time, the direct molecular weight (MW) distribution of DNA sodium salt from calf-thymus revealing two populations at high (~10 MDa) and low (~3 MDa) molecular weights. We evidence a transition between the high-MW to the low-MW distribution, confirming that the low-MW distribution results from degradation of CT-DNA. Finally, we report also IRMPD experiments carried out on trapped single-stranded linear DNAs from calf-thymus allowing extraction of their activation energy for unimolecular dissociation. CONCLUSIONS We show that single-pass CDMS is a direct, efficient and accurate MS-based approach to determine the composition of calf-thymus DNAs. Furthermore, ion trap CDMS allows us to evaluate the stability (both under multiphoton IR irradiation and in the course of sonication by irradiating ultrasonic wave) of calf-thymus DNAs.
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Affiliation(s)
- Mohammad A Halim
- Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR 5306, Univ Lyon, F-69622, Lyon, France
| | - Franck Bertorelle
- Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR 5306, Univ Lyon, F-69622, Lyon, France
| | - Tristan Doussineau
- Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR 5306, Univ Lyon, F-69622, Lyon, France
| | - Rodolphe Antoine
- Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR 5306, Univ Lyon, F-69622, Lyon, France
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30
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Dominguez-Medina S, Fostner S, Defoort M, Sansa M, Stark AK, Halim MA, Vernhes E, Gely M, Jourdan G, Alava T, Boulanger P, Masselon C, Hentz S. Neutral mass spectrometry of virus capsids above 100 megadaltons with nanomechanical resonators. Science 2019; 362:918-922. [PMID: 30467165 DOI: 10.1126/science.aat6457] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/20/2018] [Accepted: 10/11/2018] [Indexed: 12/26/2022]
Abstract
Measurement of the mass of particles in the mega- to gigadalton range is challenging with conventional mass spectrometry. Although this mass range appears optimal for nanomechanical resonators, nanomechanical mass spectrometers often suffer from prohibitive sample loss, extended analysis time, or inadequate resolution. We report on a system architecture combining nebulization of the analytes from solution, their efficient transfer and focusing without relying on electromagnetic fields, and the mass measurements of individual particles using nanomechanical resonator arrays. This system determined the mass distribution of ~30-megadalton polystyrene nanoparticles with high detection efficiency and effectively performed molecular mass measurements of empty or DNA-filled bacteriophage T5 capsids with masses up to 105 megadaltons using less than 1 picomole of sample and with an instrument resolution above 100.
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Affiliation(s)
- Sergio Dominguez-Medina
- Université Grenoble Alpes, F-38000 Grenoble, France.,CEA, BIG, Biologie à Grande Echelle, F-38054 Grenoble, France.,Inserm, Unité 1038, F-38054 Grenoble, France
| | - Shawn Fostner
- Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France
| | - Martial Defoort
- Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France
| | - Marc Sansa
- Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France
| | - Ann-Kathrin Stark
- Université Grenoble Alpes, F-38000 Grenoble, France.,CEA, BIG, Biologie à Grande Echelle, F-38054 Grenoble, France.,Inserm, Unité 1038, F-38054 Grenoble, France
| | - Mohammad Abdul Halim
- Université Grenoble Alpes, F-38000 Grenoble, France.,CEA, BIG, Biologie à Grande Echelle, F-38054 Grenoble, France.,Inserm, Unité 1038, F-38054 Grenoble, France
| | - Emeline Vernhes
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198, Gif sur Yvette cedex, France
| | - Marc Gely
- Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France
| | | | - Thomas Alava
- Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France
| | - Pascale Boulanger
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198, Gif sur Yvette cedex, France
| | - Christophe Masselon
- Université Grenoble Alpes, F-38000 Grenoble, France. .,CEA, BIG, Biologie à Grande Echelle, F-38054 Grenoble, France.,Inserm, Unité 1038, F-38054 Grenoble, France
| | - Sébastien Hentz
- Université Grenoble Alpes, CEA, LETI, 38000 Grenoble, France.
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31
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Fakhouri H, Perić M, Bertorelle F, Dugourd P, Dagany X, Russier-Antoine I, Brevet PF, Bonačić-Koutecký V, Antoine R. Sub-100 nanometer silver doped gold–cysteine supramolecular assemblies with enhanced nonlinear optical properties. Phys Chem Chem Phys 2019; 21:12091-12099. [DOI: 10.1039/c9cp00829b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The ability of gold(i) thiolates to self-assemble into supramolecular architectures opens the route for a new class of nanomaterials with a unique structure–optical property relationship.
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Affiliation(s)
- Hussein Fakhouri
- Univ Lyon
- Université Claude Bernard Lyon 1
- CNRS
- Institut Lumière Matière
- Lyon
| | - Martina Perić
- Center of Excellence for Science and Technology-Integration of Mediterranean Region (STIM) at Interdisciplinary Center for Advanced Sciences and Technology (ICAST)
- University of Split
- 21000 Split
- Croatia
| | - Franck Bertorelle
- Univ Lyon
- Université Claude Bernard Lyon 1
- CNRS
- Institut Lumière Matière
- Lyon
| | - Philippe Dugourd
- Univ Lyon
- Université Claude Bernard Lyon 1
- CNRS
- Institut Lumière Matière
- Lyon
| | - Xavier Dagany
- Univ Lyon
- Université Claude Bernard Lyon 1
- CNRS
- Institut Lumière Matière
- Lyon
| | | | | | - Vlasta Bonačić-Koutecký
- Center of Excellence for Science and Technology-Integration of Mediterranean Region (STIM) at Interdisciplinary Center for Advanced Sciences and Technology (ICAST)
- University of Split
- 21000 Split
- Croatia
- Chemistry Department
| | - Rodolphe Antoine
- Univ Lyon
- Université Claude Bernard Lyon 1
- CNRS
- Institut Lumière Matière
- Lyon
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32
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Dunbar CA, Callaway HM, Parrish CR, Jarrold MF. Probing Antibody Binding to Canine Parvovirus with Charge Detection Mass Spectrometry. J Am Chem Soc 2018; 140:15701-15711. [PMID: 30398860 DOI: 10.1021/jacs.8b08050] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
There are many techniques for monitoring and measuring the interactions between proteins and ligands. Most of these techniques are ensemble methods that can provide association constants and in some cases stoichiometry. Here we use charge detection mass spectrometry (CDMS), a single particle technique, to probe the interactions of antigen binding fragments (Fabs) from a series of antibodies with the canine parvovirus (CPV) capsid. In addition to providing the average number of bound Fabs as a function of Fab concentration (i.e., the binding curve), CDMS measurements provide information about the distribution of bound Fabs. We show that the distribution of bound ligands is much better at distinguishing between different binding models than the binding curve. The binding of Fab E to CPV is a textbook example. A maximum of 60 Fabs bind and the results are consistent with a model where all sites have the same binding affinity. However, for Fabs B, F, and 14, the distributions can only be fit by a model where there are distinct virus subpopulations with different binding affinities. This behavior can be distinguished from a situation where all CPV particles are identical, and each particle has the same distribution of sites with different binding affinities. The different responses to viral heterogeneity can be traced to the Fab binding sites. A comparison of Fab binding to new and aged CPV capsids reveals that a post-translational modification at the binding site for Fab E (M569) probably reduces the binding affinity.
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Affiliation(s)
- Carmen A Dunbar
- Department of Chemistry , Indiana University , 800 E. Kirkwood Ave. , Bloomington , Indiana 47405 , United States
| | - Heather M Callaway
- Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine , Cornell University , Ithaca , New York 14850 , United States
| | - Colin R Parrish
- Baker Institute for Animal Health, Department of Microbiology and Immunology, College of Veterinary Medicine , Cornell University , Ithaca , New York 14850 , United States
| | - Martin F Jarrold
- Department of Chemistry , Indiana University , 800 E. Kirkwood Ave. , Bloomington , Indiana 47405 , United States
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33
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Hogan JA, Jarrold MF. Optimized Electrostatic Linear Ion Trap for Charge Detection Mass Spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:2086-2095. [PMID: 29987663 DOI: 10.1007/s13361-018-2007-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 05/25/2018] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
In charge detection mass spectrometry (CDMS), ions are passed through a detection tube and the m/z ratio and charge are determined for each ion. The uncertainty in the charge and m/z determinations can be dramatically reduced by embedding the detection tube in an electrostatic linear ion trap (ELIT) so that ions oscillate back and forth through the detection tube. The resulting time domain signal can be analyzed by fast Fourier transforms (FFTs). The ion's m/z is proportional to the square of the oscillation frequency, and its charge is derived from the FFT magnitude. The ion oscillation frequency is dependent on the physical dimensions of the trap as well as the ion energy. A new ELIT has been designed for CDMS using the central particle method. In the new design, the kinetic energy dependence of the ion oscillation frequency is reduced by an order of magnitude. An order of magnitude reduction in energy dependence should have led to an order of magnitude reduction in the uncertainty of the m/z determination. In practice, a factor of four improvements was achieved. This discrepancy is probably mainly due to the trajectory dependence of the ion oscillation frequency. The new ELIT design uses a duty cycle of 50%. We show that a 50% duty cycle produces the lowest uncertainty in the charge determination. This is due to the absence of even-numbered harmonics in the FFT, which in turn leads to an increase in the magnitude of the peak at the fundamental frequency. Graphical Abstract ᅟ.
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Affiliation(s)
- Joanna A Hogan
- Chemistry Department, Indiana University, Bloomington, IN, 47405, USA
| | - Martin F Jarrold
- Chemistry Department, Indiana University, Bloomington, IN, 47405, USA.
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34
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Sage E, Sansa M, Fostner S, Defoort M, Gély M, Naik AK, Morel R, Duraffourg L, Roukes ML, Alava T, Jourdan G, Colinet E, Masselon C, Brenac A, Hentz S. Single-particle mass spectrometry with arrays of frequency-addressed nanomechanical resonators. Nat Commun 2018; 9:3283. [PMID: 30115919 PMCID: PMC6095856 DOI: 10.1038/s41467-018-05783-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 06/05/2018] [Indexed: 12/24/2022] Open
Abstract
One of the main challenges to overcome to perform nanomechanical mass spectrometry analysis in a practical time frame stems from the size mismatch between the analyte beam and the small nanomechanical detector area. We report here the demonstration of mass spectrometry with arrays of 20 multiplexed nanomechanical resonators; each resonator is designed with a distinct resonance frequency which becomes its individual address. Mass spectra of metallic aggregates in the MDa range are acquired with more than one order of magnitude improvement in analysis time compared to individual resonators. A 20 NEMS array is probed in 150 ms with the same mass limit of detection as a single resonator. Spectra acquired with a conventional time-of-flight mass spectrometer in the same system show excellent agreement. We also demonstrate how mass spectrometry imaging at the single-particle level becomes possible by mapping a 4-cm-particle beam in the MDa range and above.
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Affiliation(s)
- Eric Sage
- Univ. Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Marc Sansa
- Univ. Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Shawn Fostner
- Univ. Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | | | - Marc Gély
- Univ. Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | - Akshay K Naik
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore, 560012, India
| | - Robert Morel
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC-Spintec, 38000, Grenoble, France
| | | | - Michael L Roukes
- Kavli Nanoscience Institute and Departments of Physics, Applied Physics, and Bioengineering, California Institute of Technology, MC 149-33, Pasadena, CA, 91125, USA
| | - Thomas Alava
- Univ. Grenoble Alpes, CEA, LETI, 38000, Grenoble, France
| | | | - Eric Colinet
- Univ. Grenoble Alpes, CEA, LETI, 38000, Grenoble, France.,APIX Analytics, 7 parvis Louis Néel - CS20050, 38040, Grenoble, France
| | - Christophe Masselon
- Université Grenoble-Alpes, 38000, Grenoble, France.,CEA, BIG, Biologie à Grande Echelle, 38054, Grenoble, France.,Inserm, Unité 1038, 38054, Grenoble, France
| | - Ariel Brenac
- Univ. Grenoble Alpes, CEA, CNRS, Grenoble INP, INAC-Spintec, 38000, Grenoble, France
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35
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Halim MA, Clavier C, Dagany X, Kerleroux M, Dugourd P, Dunbar RC, Antoine R. Infrared laser dissociation of single megadalton polymer ions in a gated electrostatic ion trap: the added value of statistical analysis of individual events. Phys Chem Chem Phys 2018; 20:11959-11966. [PMID: 29670983 DOI: 10.1039/c8cp00404h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we report the unimolecular dissociation mechanism of megadalton SO3-containing poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPS) polymer cations and anions with the aid of infrared multiphoton dissociation coupled to charge detection ion trap mass spectrometry. A gated electrostatic ion trap ("Benner trap") is used to store and detect single gaseous polymer ions generated by positive and negative polarity in an electrospray ionization source. The trapped ions are then fragmented due to the sequential absorption of multiple infrared photons produced from a continuous-wave CO2 laser. Several fragmentation pathways having distinct signatures are observed. Highly charged parent ions characteristically adopt a distinctive "stair-case" pattern (assigned to the "fission" process) whereas low charge species take on a "funnel like" shape (assigned to the "evaporation" process). Also, the log-log plot of the dissociation rate constants as a function of laser intensity between PAMPS positive and negative ions is significantly different.
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Affiliation(s)
- Mohammad A Halim
- Institut Lumière Matière, UMR 5306, Université Claude Bernard Lyon 1, CNRS, F-69622 Lyon, France.
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36
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Daly S, MacAleese L, Dugourd P, Chirot F. Combining Structural Probes in the Gas Phase - Ion Mobility-Resolved Action-FRET. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:133-139. [PMID: 29038996 DOI: 10.1007/s13361-017-1824-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 09/15/2017] [Accepted: 09/27/2017] [Indexed: 06/07/2023]
Abstract
In the context of native mass spectrometry, the development of gas-phase structural probes sensitive to the different levels of structuration of biomolecular assemblies is necessary to push forward conformational studies. In this paper, we provide the first example of the combination of ion mobility (IM) and Förster resonance energy transfer (FRET) measurements within the same experimental setup. The possibility to obtain mass- and mobility-resolved FRET measurements is demonstrated on a model peptide and applied to monitor the collision-induced unfolding of ubiquitin. Graphical Abstract ᅟ.
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Affiliation(s)
- Steven Daly
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière UMR 5306, F-69100, Villeurbanne, France
- Université de Bordeaux, INSERM U1212, CNRS UMR 5320, ARNA Laboratory, IECB, F-33600, Pessac, France
| | - Luke MacAleese
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière UMR 5306, F-69100, Villeurbanne, France
| | - Philippe Dugourd
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière UMR 5306, F-69100, Villeurbanne, France
| | - Fabien Chirot
- Univ Lyon, Université Claude Bernard Lyon 1, Ens de Lyon, CNRS, Institut des Sciences Analytiques UMR 5280, 5 rue de la Doua, F-69100, Villeurbanne, France.
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37
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Tran VL, Thakare V, Rossetti F, Baudouin A, Ramniceanu G, Doan BT, Mignet N, Comby-Zerbino C, Antoine R, Dugourd P, Boschetti F, Denat F, Louis C, Roux S, Doussineau T, Tillement O, Lux F. One-pot direct synthesis for multifunctional ultrasmall hybrid silica nanoparticles. J Mater Chem B 2018; 6:4821-4834. [DOI: 10.1039/c8tb00195b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A novel and simple route to synthesize ultrasmall silica nanoparticles having hydrodynamic diameters under 10 nm for imaging and therapeutic applications.
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38
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Fallah MA, Gerding HR, Scheibe C, Drescher M, Karreman C, Schildknecht S, Leist M, Hauser K. Simultaneous IR-Spectroscopic Observation of α-Synuclein, Lipids, and Solvent Reveals an Alternative Membrane-Induced Oligomerization Pathway. Chembiochem 2017; 18:2312-2316. [PMID: 28980756 DOI: 10.1002/cbic.201700355] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Indexed: 12/15/2022]
Abstract
The intrinsically disordered protein α-synuclein (αS), a known pathogenic factor for Parkinson's disease, can adopt defined secondary structures when interacting with membranes or during fibrillation. The αS-lipid interaction and the implications of this process for aggregation and damage to membranes are still poorly understood. Therefore, we established a label-free infrared (IR) spectroscopic approach to allow simultaneous monitoring of αS conformation and membrane integrity. IR showed its unique sensitivity for identifying distinct β-structured aggregates. A comparative study of wild-type αS and the naturally occurring splicing variant αS Δexon3 yielded new insights into the membrane's capability for altering aggregation pathways.
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Affiliation(s)
- Mohammad A Fallah
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Hanne R Gerding
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Christian Scheibe
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Malte Drescher
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Christiaan Karreman
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Stefan Schildknecht
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Marcel Leist
- Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
| | - Karin Hauser
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
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39
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Ion mobility-mass spectrometry and orthogonal gas-phase techniques to study amyloid formation and inhibition. Curr Opin Struct Biol 2017; 46:7-15. [DOI: 10.1016/j.sbi.2017.03.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 02/28/2017] [Accepted: 03/03/2017] [Indexed: 11/24/2022]
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40
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Rengaraj S, Haddad R, Lojou E, Duraffourg N, Holzinger M, Le Goff A, Forge V. Interprotein Electron Transfer between FeS-Protein Nanowires and Oxygen-Tolerant NiFe Hydrogenase. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Saravanan Rengaraj
- Univ. Grenoble Alpes, CNRS, CEA, BIG/CBM/AFFOND; 38000 Grenoble France
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250; 38000 Grenoble France
| | - Raoudha Haddad
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250; 38000 Grenoble France
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP UMR 7281; 31 chemin Aiguier 13009 Marseille France
| | | | | | - Alan Le Goff
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250; 38000 Grenoble France
| | - Vincent Forge
- Univ. Grenoble Alpes, CNRS, CEA, BIG/CBM/AFFOND; 38000 Grenoble France
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41
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Rengaraj S, Haddad R, Lojou E, Duraffourg N, Holzinger M, Le Goff A, Forge V. Interprotein Electron Transfer between FeS-Protein Nanowires and Oxygen-Tolerant NiFe Hydrogenase. Angew Chem Int Ed Engl 2017; 56:7774-7778. [DOI: 10.1002/anie.201702042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Saravanan Rengaraj
- Univ. Grenoble Alpes, CNRS, CEA, BIG/CBM/AFFOND; 38000 Grenoble France
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250; 38000 Grenoble France
| | - Raoudha Haddad
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250; 38000 Grenoble France
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP UMR 7281; 31 chemin Aiguier 13009 Marseille France
| | | | | | - Alan Le Goff
- Univ. Grenoble Alpes, CNRS, DCM UMR 5250; 38000 Grenoble France
| | - Vincent Forge
- Univ. Grenoble Alpes, CNRS, CEA, BIG/CBM/AFFOND; 38000 Grenoble France
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42
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Wang H, Feng Z, Xu B. D-amino acid-containing supramolecular nanofibers for potential cancer therapeutics. Adv Drug Deliv Rev 2017; 110-111:102-111. [PMID: 27102943 PMCID: PMC5071117 DOI: 10.1016/j.addr.2016.04.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 03/19/2016] [Accepted: 04/06/2016] [Indexed: 12/30/2022]
Abstract
Nanostructures formed by peptides that self-assemble in water through non-covalent interactions have attracted considerable attention because peptides possess several unique advantages, such as modular design and easiness of synthesis, convenient modification with known functional motifs, good biocompatibility, low immunogenicity and toxicity, inherent biodegradability, and fast responses to a wide range of external stimuli. After about two decades of development, peptide-based supramolecular nanostructures have already shown great potentials in the fields of biomedicine. Among a range of biomedical applications, using such nanostructures for cancer therapy has attracted increased interests since cancer remains the major threat for human health. Comparing with L-peptides, nanostructures containing peptides made of D-amino acid (i.e., D-peptides) bear a unique advantage, biostability (i.e., resistance towards most of endogenous enzymes). The exploration of nanostructures containing D-amino acids, especially their biomedical applications, is still in its infancy. Herein we review the recent progress of D-amino acid-containing supramolecular nanofibers as an emerging class of biomaterials that exhibit unique features for the development of cancer therapeutics. In addition, we give a brief perspective about the challenges and promises in this research direction.
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Affiliation(s)
- Huaimin Wang
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Zhaoqianqi Feng
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA
| | - Bing Xu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453, USA.
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Bascetin R, Admane K, Agniel R, Boudou T, Doussineau T, Antoine R, Gallet O, Leroy-Dudal J, Vendrely C. Amyloid-like aggregates formation by blood plasma fibronectin. Int J Biol Macromol 2017; 97:733-743. [PMID: 28109813 DOI: 10.1016/j.ijbiomac.2017.01.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/06/2017] [Accepted: 01/12/2017] [Indexed: 10/20/2022]
Abstract
Fibronectin (FN) is a multifunctional glycoprotein of the extracellular matrix (ECM) playing critical roles in physiological and pathological cell processes like adhesion, migration, growth, and differentiation. These various functions of FN are modulated by its supramolecular state. Indeed, FN can polymerize into different types of assemblies like fibrils and aggregates. However, the mechanism of polymerization and the effects of such assemblies on cell behaviors still remain to be elucidated. Here we show that upon irreversible thermal denaturation, human blood plasma fibronectin forms high molecular weight aggregates. These compact and globular aggregates show amyloid features: they are stabilized by intermolecular b-sheets, they bind Thioflavin T and they are resistant to reducing and denaturing agents. Their characterization by electrospray ionization charge detection mass spectrometry shows that two populations can be distinguished according to the mass and charge density. Despite their amyloid features and the presence of hydrophobic patches on their surface, these aggregates are not toxic for cells. However, their binding abilities to gelatin and RGD are drastically decreased compare to native FN, suggesting possible effects on ECM-cell interactions.
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Affiliation(s)
- Rümeyza Bascetin
- ERRMECe, I-MAT FD4122, Université de Cergy-Pontoise, MIR, rue Descartes, 95031, Neuville sur Oise Cedex, France
| | - Khadija Admane
- ERRMECe, I-MAT FD4122, Université de Cergy-Pontoise, MIR, rue Descartes, 95031, Neuville sur Oise Cedex, France
| | - Rémy Agniel
- ERRMECe, I-MAT FD4122, Université de Cergy-Pontoise, MIR, rue Descartes, 95031, Neuville sur Oise Cedex, France
| | - Thomas Boudou
- Université Grenoble Alpes, Institut Technologique de Grenoble, CNRS, UMR 5628, LMGP, 3 Parvis Louis Néel, 38016, Grenoble, France
| | - Tristan Doussineau
- Université Lyon 1-CNRS, Université de Lyon, UMR5306, Institut Lumière Matière, 69622, Villeurbanne, France
| | - Rodolphe Antoine
- Université Lyon 1-CNRS, Université de Lyon, UMR5306, Institut Lumière Matière, 69622, Villeurbanne, France
| | - Olivier Gallet
- ERRMECe, I-MAT FD4122, Université de Cergy-Pontoise, MIR, rue Descartes, 95031, Neuville sur Oise Cedex, France
| | - Johanne Leroy-Dudal
- ERRMECe, I-MAT FD4122, Université de Cergy-Pontoise, MIR, rue Descartes, 95031, Neuville sur Oise Cedex, France
| | - Charlotte Vendrely
- ERRMECe, I-MAT FD4122, Université de Cergy-Pontoise, MIR, rue Descartes, 95031, Neuville sur Oise Cedex, France.
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A synthetic redox biofilm made from metalloprotein–prion domain chimera nanowires. Nat Chem 2016; 9:157-163. [DOI: 10.1038/nchem.2616] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 08/16/2016] [Indexed: 11/08/2022]
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Faucon A, Benhelli-Mokrani H, Fleury F, Dubreil L, Hulin P, Nedellec S, Doussineau T, Antoine R, Orlando T, Lascialfari A, Fresnais J, Lartigue L, Ishow E. Tuning the architectural integrity of high-performance magneto-fluorescent core-shell nanoassemblies in cancer cells. J Colloid Interface Sci 2016; 479:139-149. [PMID: 27388127 DOI: 10.1016/j.jcis.2016.06.064] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 06/24/2016] [Accepted: 06/27/2016] [Indexed: 01/21/2023]
Abstract
High-density nanoarchitectures, endowed with simultaneous fluorescence and contrast properties for MRI and TEM imaging, have been obtained using a simple self-assembling strategy based on supramolecular interactions between non-doped fluorescent organic nanoparticles (FON) and superparamagnetic nanoparticles. In this way, a high-payload core-shell structure FON@mag has been obtained, protecting the hydrophobic fluorophores from the surroundings as well as from emission quenching by the shell of magnetic nanoparticles. Compared to isolated nanoparticles, maghemite nanoparticles self-assembled as an external shell create large inhomogeneous magnetic field, which causes enhanced transverse relaxivity and exacerbated MRI contrast. The magnetic load of the resulting nanoassemblies is evaluated using magnetic sedimentation and more originally electrospray mass spectrometry. The role of the stabilizing agents (citrate versus polyacrylate anions) revealed to be crucial regarding the cohesion of the resulting high-performance magneto-fluorescent nanoassemblies, which questions their use after cell internalization as nanocarriers or imaging agents for reliable correlative light and electron microcopy.
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Affiliation(s)
- Adrien Faucon
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | | | - Fabrice Fleury
- UFIP-UMR CNRS 6204, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Laurence Dubreil
- Pan Ther-UMR 703, INRA-ONIRIS, Atlanpole-Chanterie, 44307 Nantes, France
| | - Philippe Hulin
- INSERM UMS 016-UMS CNRS 3556, 8 quai Moncousu, 44007 Nantes, France
| | - Steven Nedellec
- INSERM UMS 016-UMS CNRS 3556, 8 quai Moncousu, 44007 Nantes, France
| | - Tristan Doussineau
- Institut Lumière Matière-UMR CNRS 5306, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Rodolphe Antoine
- Institut Lumière Matière-UMR CNRS 5306, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Tomas Orlando
- Department of Physics, Università di Pavia, via Bassi, 27100 Pavia, Italy
| | - Alessandro Lascialfari
- Department of Physics, Università di Pavia, via Bassi, 27100 Pavia, Italy; Department of Physics, Università degli Studi di Milano and INSTM, via Celoria 16, 20133 Milano, Italy
| | - Jérôme Fresnais
- Sorbonne Universités, UPMC Univ. Paris 06, CNRS, Laboratoire PHENIX, 4 place Jussieu, 75005 Paris, France
| | - Lénaïc Lartigue
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Eléna Ishow
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France.
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Loumaigne M, Midelet C, Doussineau T, Dugourd P, Antoine R, Stamboul M, Débarre A, Werts MHV. Optical extinction and scattering cross sections of plasmonic nanoparticle dimers in aqueous suspension. NANOSCALE 2016; 8:6555-6570. [PMID: 26935710 DOI: 10.1039/c6nr00918b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Absolute extinction and scattering cross sections for gold nanoparticle dimers were determined experimentally using a chemometric approach involving singular-value decomposition of the extinction and scattering spectra of slowly aggregating gold nanospheres in aqueous suspension. Quantitative spectroscopic data on plasmonic nanoparticle assemblies in liquid suspension are rare, in particular for particles larger than 40 nm, and in this work we demonstrate how such data can be obtained directly from the aggregating suspension. Our method can analyse, non invasively, the evolution of several sub-populations of nanoparticle assemblies. It may be applied to other self-assembling nanoparticle systems with an evolving optical response. The colloidal systems studied here are based on 20, 50 and 80 nm gold nanospheres in aqueous solutions containing sodium lipoate. In these systems, the reversible dimerisation process can be controlled using pH and ionic strength, and this control is rationalised in terms of DLVO theory. The dimers were identified in suspension by their translational and rotational diffusion through scattering correlation spectroscopy. Moreover, their gigadalton molecular weight was measured using electrospray charge-detection mass spectrometry, demonstrating that mass spectrometry can be used to study nanoparticles assemblies of very high molecular mass. The extinction and scattering cross sections calculated in the discrete-dipole approximation (DDA) agree very well with those obtained experimentally using our approach.
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Affiliation(s)
- Matthieu Loumaigne
- École normale supérieure de Rennes, CNRS, SATIE (UMR 8029), Campus de Ker Lann, F-35170 Bruz, France.
| | - Clyde Midelet
- École normale supérieure de Rennes, CNRS, SATIE (UMR 8029), Campus de Ker Lann, F-35170 Bruz, France.
| | - Tristan Doussineau
- Institut Lumière Matière, UMR CNRS 5306 and Université Claude Bernard Lyon 1, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Philippe Dugourd
- Institut Lumière Matière, UMR CNRS 5306 and Université Claude Bernard Lyon 1, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Rodolphe Antoine
- Institut Lumière Matière, UMR CNRS 5306 and Université Claude Bernard Lyon 1, Université de Lyon, 69622 Villeurbanne cedex, France
| | - Meriem Stamboul
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Cachan, Université Paris-Saclay, 91405 Orsay Cedex, France
| | - Anne Débarre
- Laboratoire Aimé Cotton, CNRS, Univ. Paris-Sud, ENS Cachan, Université Paris-Saclay, 91405 Orsay Cedex, France and École normale supérieure de Cachan, CNRS, PPSM (UMR 8531), F-94235 Cachan, France
| | - Martinus H V Werts
- École normale supérieure de Rennes, CNRS, SATIE (UMR 8029), Campus de Ker Lann, F-35170 Bruz, France.
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