1
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Liu S, Ma B, Qi L, Ping J, Che Y, Zhang Y, Su M, Song Y, Qi L, Jiang Y, Fang X. Ultrasensitive Detection of Cancer Biomarkers Using Photonic-Crystal-Enhanced Single-Molecule Imaging. Anal Chem 2024; 96:13719-13726. [PMID: 39120618 DOI: 10.1021/acs.analchem.4c02863] [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: 08/10/2024]
Abstract
The rapid and sensitive quantification of low-abundance protein markers holds immense significance in early disease diagnosis and treatment. Single-molecule fluorescence imaging exhibits very high detection sensitivity and thus has great application potential in this area. The single-molecule signal, however, is often susceptible to interference from background noise due to its inherently weak intensity. A variety of signal amplification techniques based on cascading reactions have been developed to improve the signal-to-noise ratio of single-molecule imaging. Nevertheless, the operation of these methods is typically complicated and time-consuming, which limits the clinical application. Herein, we introduce an enzyme-free, photonic-crystal-based single-molecule (PC-SM) biochip for cost-effective, time-efficient, and ultrasensitive detection of disease markers. The PC-SM biochip can enhance the signal-to-noise ratio of single molecules by nearly 3-fold compared with unamplified samples, through coupling of the single-molecule photon energy with the optical band gap of the photonic crystal. We used the PC-SM biochip to detect the low-abundance leukemia inhibitory factor in the blood of pancreatic cancer patients and healthy people and achieved a detection limit of 2.0 pg/L and an AUC of 0.9067. The method exhibits exceptional sensitivity and specificity, showing great application potential in various clinical settings.
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Affiliation(s)
- Songlin Liu
- School of Chemistry and Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
| | - Bochen Ma
- Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
| | - LiQing Qi
- Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
| | - Jiantao Ping
- Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, P. R. China
| | - YuDong Che
- ZheJiang Cancer Hospital Hangzhou, Zhejiang 310022, P. R. China
| | - YiMin Zhang
- ZheJiang Cancer Hospital Hangzhou, Zhejiang 310022, P. R. China
| | - Meng Su
- Key Laboratory of Green Printing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - YanLin Song
- Key Laboratory of Green Printing, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - LuBin Qi
- Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
| | - Yifei Jiang
- Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
| | - Xiaohong Fang
- School of Chemistry and Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, P. R. China
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Science, Beijing 100190, P. R. China
- School of Molecular Medicine, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, P. R. China
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2
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Rudolf-Scholik J, Lilek D, Maier M, Reischenböck T, Maisl C, Allram J, Herbinger B, Rechthaler J. Increasing protein identifications in bottom-up proteomics of T. castaneum - Exploiting synergies of protein biochemistry and bioinformatics. J Chromatogr B Analyt Technol Biomed Life Sci 2024; 1240:124128. [PMID: 38759531 DOI: 10.1016/j.jchromb.2024.124128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/29/2024] [Accepted: 04/14/2024] [Indexed: 05/19/2024]
Abstract
Depending on the respective research question, LC-MS/MS based bottom-up proteomics poses challenges from the initial biological sample all the way to data evaluation. The focus of this study was to investigate the influence of sample preparation techniques and data analysis parameters on protein identification in Tribolium castaneum by applying free software proteomics platform Max Quant. Multidimensional protein extraction strategies in combination with electrophoretic or chromatographic off-line protein pre-fractionation were applied to enhance the spectrum of isolated proteins from T. castaneum and reduce the effect of co-elution and ion suppression effects during nano-LC-MS/MS measurements of peptides. For comprehensive data analysis, MaxQuant was used for protein identification and R for data evaluation. A wide range of parameters were evaluated to gain reproducible, reliable, and significant protein identifications. A simple phosphate buffer, pH 8, containing protease and phosphatase inhibitor cocktail and application of gentle extraction conditions were used as a first extraction step for T.castaneum proteins. Furthermore, a two-dimensional extraction procedure in combination with electrophoretic pre-fractionation of extracted proteins and subsequent in-gel digest resulted in almost 100% increase of identified proteins when compared to chromatographic fractionation as well as one-pot-analysis. The additionally identified proteins could be assigned to new molecular functions or cell compartments, emphasizing the positive effect of extended sample preparation in bottom-up proteomics. Besides the number of peptides during post-processing, MaxQuant's Match between Runs exhibited a crucial effect on the number of identified proteins. A maximum relative standard deviation of 2% must be considered for the data analysis. Our work with Tribolium castaneum larvae demonstrates that sometimes - depending on matrix and research question - more complex and time-consuming sample preparation can be advantageous for isolation and identification of additional proteins in bottom-up proteomics.
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Affiliation(s)
- J Rudolf-Scholik
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA.
| | - D Lilek
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
| | - M Maier
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
| | - T Reischenböck
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
| | - C Maisl
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
| | - J Allram
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
| | - B Herbinger
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
| | - J Rechthaler
- University of Applied Sciences Wiener Neustadt, Biotech Campus Tulln, AUSTRIA
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3
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Chen J, Zeng Q, Zhang Y, Xu Y, Yang Y, Yu H. Classification of Molecular Binding Traces for Dynamic Single-Molecule Sensing. Anal Chem 2024; 96:2327-2332. [PMID: 38308847 DOI: 10.1021/acs.analchem.3c03534] [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: 02/05/2024]
Abstract
Interference from nonspecific binding imposes a fundamental limit in the sensitivity of biosensors that is dependent on the affinity and specificity of the available sensing probes. The dynamic single-molecule sensing (DSMS) strategy allows ultrasensitive detection of biomarkers at the femtomolar level by identifying specific binding according to molecular binding traces. However, the accuracy in classifying binding traces is not sufficient from separate features, such as the bound lifetime. Here, we establish a DSMS workflow to improve the sensitivity and linearity by classifying molecular binding traces in surface plasmon resonance microscopy with multiple kinetic features. The improvement is achieved by correlation analysis to select key features of binding traces, followed by unsupervised k-clustering. The results show that this unsupervised classification approach improves the sensitivity and linearity in microRNA (hsa-miR155-5p, hsa-miR21-5p, and hsa-miR362-5p) detection to achieve a limit of detection at the subfemtomolar level.
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Affiliation(s)
- Juntao Chen
- College of Automation, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China
| | - Qiang Zeng
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Yiyang Zhang
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Ying Xu
- College of Automation, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China
| | - Yuting Yang
- School of Sensing Science and Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Hui Yu
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
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4
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Asicioglu M, Oztug M, Karaguler NG. Development of an ID-LC-MS/MS method using targeted proteomics for quantifying cardiac troponin I in human serum. Clin Proteomics 2023; 20:40. [PMID: 37759177 PMCID: PMC10536812 DOI: 10.1186/s12014-023-09430-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND Cardiac troponin is a complex protein consisting of the three subunits I, T and C located in heart muscle cells. When the heart muscle is damaged, it is released into the blood and can be detected. Cardiac troponin I (cTnI) is considered the most reliable and widely accepted test for detecting and confirming acute myocardial infarction. However, there is no current standardization between the commercial assays for cTnI quantification. Our work aims to create a measurement procedure that is traceable to the International System of Units for accurately measuring cardiac cTnI levels in serum samples from patients. METHODS The workflow begins with immobilizing anti-cTnI antibodies onto magnetic nanoparticles to form complexes. These complexes are used to isolate cTnI from serum. Next, trypsin is used to enzymatically digest the isolated cTnI. Finally, the measurement of multiple cTnI peptides is done simultaneously using isotope dilution liquid chromatography-tandem mass spectrometry (ID-LC-MS/MS). RESULTS The maximum antibody immobilization was achieved by combining 1 mg of nanoparticles with 100 μg of antibody, resulting in an average of 59.2 ± 5.7 μg/mg of immobilized antibody. Subsequently, the anti-cTnI-magnetic nanoparticle complex was utilized to develop and validate a method for quantifying cTnI in human serum using ID-LC-MS/MS and a protein calibration approach. The analytical method was assessed regarding linearity and recovery. The developed method enables the quantification of cTnI from 0.7 to 24 μg/L (R > 0.996). The limit of quantification was 1.8 μg/L and the limit of detection was 0.6 μg/L. Intermediate precision was ≤ 9.6% and repeatability was 2.0-8.7% for all quality control materials. The accuracy of the analyzed quality control materials was between 90 and 110%. Total measurement uncertainties for target value assignment (n = 6) were found to be ≤ 12.5% for all levels. CONCLUSIONS The analytical method demonstrated high analytical performance in accurately quantifying cardiac troponin I levels in human serum. The proposed analytical method has the potential to facilitate the harmonization of cTnI results between clinical laboratories, assign target values to secondary certified reference materials and support reliable measurement of cTnI.
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Affiliation(s)
- Meltem Asicioglu
- TUBITAK National Metrology Institute (TUBITAK UME), Gebze, 41400, Kocaeli, Turkey
- Department of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical University, Istanbul, Turkey
- Dr. Orhan Ocalgiray Molecular Biology-Biotechnology and Genetics Research Center, Istanbul Technical University, Istanbul, Turkey
| | - Merve Oztug
- TUBITAK National Metrology Institute (TUBITAK UME), Gebze, 41400, Kocaeli, Turkey.
| | - Nevin Gul Karaguler
- Department of Molecular Biology and Genetics, Faculty of Science and Letters, Istanbul Technical University, Istanbul, Turkey
- Dr. Orhan Ocalgiray Molecular Biology-Biotechnology and Genetics Research Center, Istanbul Technical University, Istanbul, Turkey
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5
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King CD, Kapp KL, Arul AB, Choi MJ, Robinson RAS. Advancements in automation for plasma proteomics sample preparation. Mol Omics 2022; 18:828-839. [PMID: 36048090 PMCID: PMC9879274 DOI: 10.1039/d2mo00122e] [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] [Indexed: 01/28/2023]
Abstract
Automation is necessary to increase sample processing throughput for large-scale clinical analyses. Replacement of manual pipettes with robotic liquid handler systems is especially helpful in processing blood-based samples, such as plasma and serum. These samples are very heterogenous, and protein expression can vary greatly from sample-to-sample, even for healthy controls. Detection of true biological changes requires that variation from sample preparation steps and downstream analytical detection methods, such as mass spectrometry, remains low. In this mini-review, we discuss plasma proteomics protocols and the benefits of automation towards enabling detection of low abundant proteins and providing low sample error and increased sample throughput. This discussion includes considerations for automation of major sample depletion and/or enrichment strategies for plasma toward mass spectrometry detection.
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Affiliation(s)
- Christina D King
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Kathryn L Kapp
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232, USA
| | - Albert B Arul
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Min Ji Choi
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Renã A S Robinson
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232, USA
- Department of Neurology, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA
- Vanderbilt Memory & Alzheimer's Center, Vanderbilt University Medical Center, Nashville, Tennessee 37212, USA
- Vanderbilt Brain Institute, Vanderbilt University, Nashville, Tennessee 37232, USA
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6
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Zhang Y, Wang G, Huang P, Sun E, Kweon J, Li Q, Zhe J, Ying LL, Zhang HF. Minimizing Molecular Misidentification in Imaging Low-Abundance Protein Interactions Using Spectroscopic Single-Molecule Localization Microscopy. Anal Chem 2022; 94:13834-13841. [PMID: 36165784 PMCID: PMC9859736 DOI: 10.1021/acs.analchem.2c02417] [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] [Indexed: 02/02/2023]
Abstract
Super-resolution microscopy can capture spatiotemporal organizations of protein interactions with resolution down to 10 nm; however, the analyses of more than two proteins involving low-abundance protein are challenging because spectral crosstalk and heterogeneities of individual fluorescent labels result in molecular misidentification. Here we developed a deep learning-based imaging analysis method for spectroscopic single-molecule localization microscopy to minimize molecular misidentification in three-color super-resolution imaging. We characterized the 3-fold reduction of molecular misidentification in the new imaging method using pure samples of different photoswitchable fluorophores and visualized three distinct subcellular proteins in U2-OS cell lines. We further validated the protein counts and interactions of TOMM20, DRP1, and SUMO1 in a well-studied biological process, Staurosporine-induced apoptosis, by comparing the imaging results with Western-blot analyses of different subcellular portions.
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Affiliation(s)
- Yang Zhang
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
| | - Gaoxiang Wang
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
- Department of Hematology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan Hubei, 430030, China
| | - Peizhou Huang
- Department of Biomedical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA
| | - Edison Sun
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
| | - Junghun Kweon
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
| | - Qianru Li
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
- Department of Pharmacology, Northwestern University, Chicago IL, 60611, USA
| | - Ji Zhe
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
- Department of Pharmacology, Northwestern University, Chicago IL, 60611, USA
| | - Leslie L. Ying
- Department of Biomedical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA
- Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260, USA
| | - Hao F. Zhang
- Department of Biomedical Engineering, Northwestern University, Evanston IL, 60208, USA
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7
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Zhong H, Li Y, Huang Y, Zhao R. Metal-organic frameworks as advanced materials for sample preparation of bioactive peptides. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:862-873. [PMID: 33543184 DOI: 10.1039/d0ay02193h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Development of novel affinity materials and separation techniques is crucial for the progress of modern proteomics and peptidomics. Detection of peptides and proteins from complex matrices still remains a challenging task due to the highly complicated biological composition, low abundance of target molecules, and large dynamic range of proteins. As an emerging area of analytical science, metal-organic framework (MOF)-based separation of proteins and peptides is attracting growing interest. This minireview summarizes the recent advances in MOF-based affinity materials for the sample preparation of proteins and peptides. Some newly emerging MOF nanoreactors for the degradation of peptides and proteins are introduced. An update of MOF-based affinity materials for the isolation of glycopeptides, phosphopeptides and low-abundance endogenous peptides in the last two years is focused on. The separation mechanism is discussed along with the chemical structures of MOFs. Finally, the remaining challenges and future development of MOFs in analyzing peptides and proteins in complicated biological samples are discussed.
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Affiliation(s)
- Huifei Zhong
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Analytical Chemistry for Living Biosystems, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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8
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Huang J, Mousavi MZ, Giovannini G, Zhao Y, Hubarevich A, Soler MA, Rocchia W, Garoli D, De Angelis F. Multiplexed Discrimination of Single Amino Acid Residues in Polypeptides in a Single SERS Hot Spot. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202000489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jian‐An Huang
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - Mansoureh Z. Mousavi
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - Giorgia Giovannini
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
- Present address: EMPA Federal Swiss research Institute 9014 St. Gallen Switzerland
| | - Yingqi Zhao
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - Aliaksandr Hubarevich
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
| | - Miguel A. Soler
- CONCEPT Lab Istituto Italiano di Tecnologia Via Melen 83 16152 Genova Italy
| | - Walter Rocchia
- CONCEPT Lab Istituto Italiano di Tecnologia Via Melen 83 16152 Genova Italy
| | - Denis Garoli
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
- AB ANALITICA s.r.l. Via Svizzera 16 35127 Padova Italy
| | - Francesco De Angelis
- Plasmon Nanotechology Unit Istituto Italiano di Tecnologia Via Morego 30 16163 Genova Italy
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9
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Huang JA, Mousavi MZ, Giovannini G, Zhao Y, Hubarevich A, Soler MA, Rocchia W, Garoli D, De Angelis F. Multiplexed Discrimination of Single Amino Acid Residues in Polypeptides in a Single SERS Hot Spot. Angew Chem Int Ed Engl 2020; 59:11423-11431. [PMID: 32250516 DOI: 10.1002/anie.202000489] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 04/03/2020] [Indexed: 01/19/2023]
Abstract
The SERS-based detection of protein sequences with single-residue sensitivity suffers from signal dominance of aromatic amino acid residues and backbones, impeding detection of non-aromatic amino acid residues. Herein, we trap a gold nanoparticle in a plasmonic nanohole to generate a single SERS hot spot for single-molecule detection of 2 similar polypeptides (vasopressin and oxytocin) and 10 distinct amino acids that constitute the 2 polypeptides. Significantly, both aromatic and non-aromatic amino acids are detected and discriminated at the single-molecule level either at individual amino acid molecules or within the polypeptide chains. Correlated with molecular dynamics simulations, our results suggest that the signal dominance due to large spatial occupancy of aromatic rings of the polypeptide sidechains on gold surfaces can be overcome by the high localization of the single hot spot. The superior spectral and spatial discriminative power of our approach can be applied to single-protein analysis, fingerprinting, and sequencing.
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Affiliation(s)
- Jian-An Huang
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Mansoureh Z Mousavi
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Giorgia Giovannini
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy.,Present address: EMPA Federal Swiss research Institute, 9014, St. Gallen, Switzerland
| | - Yingqi Zhao
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Aliaksandr Hubarevich
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Miguel A Soler
- CONCEPT Lab, Istituto Italiano di Tecnologia, Via Melen 83, 16152, Genova, Italy
| | - Walter Rocchia
- CONCEPT Lab, Istituto Italiano di Tecnologia, Via Melen 83, 16152, Genova, Italy
| | - Denis Garoli
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy.,AB ANALITICA s.r.l., Via Svizzera 16, 35127, Padova, Italy
| | - Francesco De Angelis
- Plasmon Nanotechology Unit, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
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10
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Caesar LK, Kellogg JJ, Kvalheim OM, Cech NB. Opportunities and Limitations for Untargeted Mass Spectrometry Metabolomics to Identify Biologically Active Constituents in Complex Natural Product Mixtures. JOURNAL OF NATURAL PRODUCTS 2019; 82:469-484. [PMID: 30844279 PMCID: PMC6837904 DOI: 10.1021/acs.jnatprod.9b00176] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Compounds derived from natural sources represent the majority of small-molecule drugs utilized today. Plants, owing to their complex biosynthetic pathways, are poised to synthesize diverse secondary metabolites that selectively target biological macromolecules. Despite the vast chemical landscape of botanicals, drug discovery programs from these sources have diminished due to the costly and time-consuming nature of standard practices and high rates of compound rediscovery. Untargeted metabolomics approaches that integrate biological and chemical data sets potentially enable the prediction of active constituents early in the fractionation process. However, data acquisition and data processing parameters may have major impacts on the success of models produced. Using an inactive botanical mixture spiked with known antimicrobial compounds, untargeted mass spectrometry-based metabolomics data were combined with bioactivity data to produce selectivity ratio models subjected to a variety of data acquisition and data processing parameters. Selectivity ratio models were used to identify active constituents that were intentionally added to the mixture, along with an additional antimicrobial compound, randainal (5), which was masked by the presence of antagonists in the mixture. These studies found that data-processing approaches, particularly data transformation and model simplification tools using a variance cutoff, had significant impacts on the models produced, either masking or enhancing the ability to detect active constituents in samples. The current study highlights the importance of the data processing step for obtaining reliable information from metabolomics models and demonstrates the strengths and limitations of selectivity ratio analysis to comprehensively assess complex botanical mixtures.
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Affiliation(s)
- Lindsay K. Caesar
- Department of Chemistry & Biochemistry, University of North Carolina Greensboro, Greensboro, NC 27402, United States
| | - Joshua J. Kellogg
- Department of Chemistry & Biochemistry, University of North Carolina Greensboro, Greensboro, NC 27402, United States
| | | | - Nadja B. Cech
- Department of Chemistry & Biochemistry, University of North Carolina Greensboro, Greensboro, NC 27402, United States
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11
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Chignell JF, Schlegel C, Ulber R, Reardon KF. Quantitative proteomic analysis of
Lactobacillus delbrueckii
ssp.
lactis
biofilms. AIChE J 2018. [DOI: 10.1002/aic.16449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jeremy F. Chignell
- Dept. of Chemical and Biological Engineering Colorado State University Fort Collins CO, 80523
| | - Christin Schlegel
- Institute of Bioprocess Engineering University of Kaiserslautern Kaiserslautern, D‐67663 Germany
| | - Roland Ulber
- Institute of Bioprocess Engineering University of Kaiserslautern Kaiserslautern, D‐67663 Germany
| | - Kenneth F. Reardon
- Dept. of Chemical and Biological Engineering Colorado State University Fort Collins CO, 80523
- Cell and Molecular Biology Graduate Program Colorado State University Fort Collins CO, 80523
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12
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Swaminathan J, Boulgakov AA, Hernandez ET, Bardo AM, Bachman JL, Marotta J, Johnson AM, Anslyn EV, Marcotte EM. Highly parallel single-molecule identification of proteins in zeptomole-scale mixtures. Nat Biotechnol 2018; 36:nbt.4278. [PMID: 30346938 PMCID: PMC6482110 DOI: 10.1038/nbt.4278] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 09/21/2018] [Indexed: 11/09/2022]
Abstract
The identification and quantification of proteins lags behind DNA-sequencing methods in scale, sensitivity, and dynamic range. Here, we show that sparse amino acid-sequence information can be obtained for individual protein molecules for thousands to millions of molecules in parallel. We demonstrate selective fluorescence labeling of cysteine and lysine residues in peptide samples, immobilization of labeled peptides on a glass surface, and imaging by total internal reflection microscopy to monitor decreases in each molecule's fluorescence after consecutive rounds of Edman degradation. The obtained sparse fluorescent sequence of each molecule was then assigned to its parent protein in a reference database. We tested the method on synthetic and naturally derived peptide molecules in zeptomole-scale quantities. We also fluorescently labeled phosphoserines and achieved single-molecule positional readout of the phosphorylated sites. We measured >93% efficiencies for dye labeling, survival, and cleavage; further improvements should enable studies of increasingly complex proteomic mixtures, with the high sensitivity and digital quantification offered by single-molecule sequencing.
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Affiliation(s)
- Jagannath Swaminathan
- Center for Systems and Synthetic Biology, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712
| | - Alexander A. Boulgakov
- Center for Systems and Synthetic Biology, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712
| | - Erik T. Hernandez
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712
| | - Angela M. Bardo
- Center for Systems and Synthetic Biology, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712
| | - James L. Bachman
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712
| | - Joseph Marotta
- Center for Systems and Synthetic Biology, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712
| | - Amber M. Johnson
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712
| | - Eric V. Anslyn
- Department of Chemistry, University of Texas at Austin, Austin, TX 78712
| | - Edward M. Marcotte
- Center for Systems and Synthetic Biology, Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712
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Metal–organic frameworks in proteomics/peptidomics-A review. Anal Chim Acta 2018; 1027:9-21. [DOI: 10.1016/j.aca.2018.04.069] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 04/25/2018] [Accepted: 04/26/2018] [Indexed: 11/17/2022]
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