1
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Liu F, Wang X, Duan J, Hou Z, Wu Z, Liu L, Lei H, Huang D, Ren Y, Wang Y, Li X, Zhuo J, Zhang Z, He B, Yan M, Yuan H, Zhang L, Yan J, Wen S, Wang Z, Liu Q. A Temporal PROTAC Cocktail-Mediated Sequential Degradation of AURKA Abrogates Acute Myeloid Leukemia Stem Cells. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2104823. [PMID: 35652200 PMCID: PMC9353462 DOI: 10.1002/advs.202104823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 04/18/2022] [Indexed: 06/15/2023]
Abstract
AURKA is a potential kinase target in various malignancies. The kinase-independent oncogenic functions partially disclose the inadequate efficacy of the kinase inhibitor in a Phase III clinical trial. Simultaneously targeting the catalytic and noncatalytic functions of AURKA may be a feasible approach. Here, a set of AURKA proteolysis targeting chimeras (PROTACs) are developed. The CRBN-based dAurA383 preferentially degrades the highly abundant mitotic AURKA, while cIAP-based dAurA450 degrades the lowly abundant interphase AURKA in acute myeloid leukemia (AML) cells. The proteomic and transcriptomic analyses indicate that dAurA383 triggers the "mitotic cell cycle" and "stem cell" processes, while dAurA450 inhibits the "MYC/E2F targets" and "stem cell" processes. dAurA383 and dAurA450 are combined as a PROTAC cocktail. The cocktail effectively degrades AURKA, relieves the hook effect, and synergistically inhibits AML stem cells. Furthermore, the PROTAC cocktail induces AML regression in a xenograft mouse model and primary patient blasts. These findings establish the PROTAC cocktail as a promising spatial-temporal drug administration strategy to sequentially eliminate the multifaceted functions of oncoproteins, relieve the hook effect, and prevent cancer stem cell-mediated drug resistance.
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Affiliation(s)
- Fang Liu
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Xuan Wang
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Jianli Duan
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Zhijie Hou
- Institute of Cancer Stem CellDalian Medical UniversityDalian116044China
| | - Zhouming Wu
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Lingling Liu
- Department of Hematologythe Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510630China
| | - Hanqi Lei
- Department of UrologyKidney and Urology CenterPelvic Floor Disorders CenterThe Seventh Affiliated HospitalSun Yat‐sen UniversityShenzhen518000China
| | - Dan Huang
- Department of Hematologythe Second Affiliated Hospital of Dalian Medical UniversityDalian116027China
| | - Yifei Ren
- Department of Hematologythe Second Affiliated Hospital of Dalian Medical UniversityDalian116027China
| | - Yue Wang
- Institute of Cancer Stem CellDalian Medical UniversityDalian116044China
| | - Xinyan Li
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Junxiao Zhuo
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Zijian Zhang
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Bin He
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Min Yan
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Huiming Yuan
- CAS Key Laboratory of Separation Sciences for Analytical ChemistryNational Chromatographic R&A CenterDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
| | - Lihua Zhang
- CAS Key Laboratory of Separation Sciences for Analytical ChemistryNational Chromatographic R&A CenterDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
| | - Jinsong Yan
- Department of Hematologythe Second Affiliated Hospital of Dalian Medical UniversityDalian116027China
| | - Shijun Wen
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Zifeng Wang
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
| | - Quentin Liu
- Sun Yat‐sen University Cancer CenterState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineGuangzhou510060China
- Institute of Cancer Stem CellDalian Medical UniversityDalian116044China
- Department of Hematologythe Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou510630China
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2
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Furet A, Sicello A, Guillemat B, Absalon C, Langleron E, Bassani DM. Revisiting the mechanism responsible for the light-struck flavor in white wines and Champagnes. Food Chem 2022; 372:131281. [PMID: 34655832 DOI: 10.1016/j.foodchem.2021.131281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/23/2021] [Accepted: 09/28/2021] [Indexed: 11/04/2022]
Abstract
The mechanism responsible for the appearance of the light-struck fault upon exposure of white wines and Champagnes to natural or artificial light is examined in light of new experiments involving methionine analogues. The latter show that the formation of volatile sulfur species upon irradiation of riboflavin in the presence of methionine in model wine solutions at pH 3 is not dependent on the existence of neighboring group stabilization of the sulfur-centered cation radical through a 5- or 6-membered cyclic intermediate. Instead, the formation of a dimer radical cation is proposed in agreement with the formation of oxidation products such as dimethyl disulfide at early reaction times and the observed steric effect upon product distribution. The limiting quantum yield for the release of sulfur atoms from a solution of methionine in model wine solutions at pH 3.5 containing riboflavin was found to be 0.26 (435 nm irradiation). No dependence of the quantum yield or product distribution on the irradiation wavelength was found over the range 365-90 nm.
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Affiliation(s)
- Amaury Furet
- Univ. Bordeaux, CNRS UMR 5255, Inst. des Sciences Moléculaires, 351, Cours de la Libération, 33405 Talence, France
| | - Audrey Sicello
- Univ. Bordeaux, CNRS UMR 5255, Inst. des Sciences Moléculaires, 351, Cours de la Libération, 33405 Talence, France
| | - Bruno Guillemat
- Pernod-Ricard S.A., 5, cours Paul Ricard, 75008 Paris, France
| | - Christelle Absalon
- Univ. Bordeaux, CNRS UMR 5255, Inst. des Sciences Moléculaires, 351, Cours de la Libération, 33405 Talence, France
| | - Emilie Langleron
- Mumm, Perrier-Jouët, 34, Rue du Champ de Mars, 51053 Reims, France
| | - Dario M Bassani
- Univ. Bordeaux, CNRS UMR 5255, Inst. des Sciences Moléculaires, 351, Cours de la Libération, 33405 Talence, France.
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3
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Zaikin VG, Borisov RS. Options of the Main Derivatization Approaches for Analytical ESI and MALDI Mass Spectrometry. Crit Rev Anal Chem 2021; 52:1287-1342. [PMID: 33557614 DOI: 10.1080/10408347.2021.1873100] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The inclusion of preliminary chemical labeling (derivatization) in the analysis process by such powerful and widespread methods as electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MS) is a popular and widely used methodological approach. This is due to the need to remove some fundamental limitations inherent in these powerful analytic methods. Although a number of special reviews has been published discussing the utilization of derivatization approaches, the purpose of the present critical review is to comprehensively summarize, characterize and evaluate most of the previously developed and practically applied, as well as recently proposed representative derivatization reagents for ESI-MS and MALDI-MS platforms in their mostly sensitive positive ion mode and frequently hyphenated with separation techniques. The review is focused on the use of preliminary chemical labeling to facilitate the detection, identification, structure elucidation, quantification, profiling or MS imaging of compounds within complex matrices. Two main derivatization approaches, namely the introduction of permanent charge-fixed or highly proton affinitive residues into analytes are critically evaluated. In situ charge-generation, charge-switch and charge-transfer derivatizations are considered separately. The potential of using reactive matrices in MALDI-MS and chemical labeling in MS-based omics sciences is given.
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Affiliation(s)
- Vladimir G Zaikin
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russian Federation
| | - Roman S Borisov
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russian Federation
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4
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Hofferek V, Su H, Reid GE. Chemical Derivatization-Aided High Resolution Mass Spectrometry for Shotgun Lipidome Analysis. Methods Mol Biol 2021; 2306:61-75. [PMID: 33954940 DOI: 10.1007/978-1-0716-1410-5_5] [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] [Indexed: 12/15/2022]
Abstract
Chemical derivatization coupled with nano-electrospray ionization (nESI) and ultra-high resolution accurate mass spectrometry (UHRAMS) is an established approach to overcome isobaric and isomeric mass interference limitations, and improve the analytical performance, of direct-infusion (i.e., "shotgun") lipidome analysis strategies for "sum composition" level identification and quantification of individual lipid species from within complex mixtures. Here, we describe a protocol for sequential functional group selective derivatization of aminophospholipids and O-alk-1'-enyl (i.e., plasmalogen) lipids, that when integrated into a shotgun lipidomics workflow involving deuterium-labeled internal lipid standard addition, monophasic lipid extraction, and nESI-UHRAMS analysis, enables the routine identification and quantification of >500 individual lipid species at the "sum composition" level, across four lipid categories and from >30 lipid classes and subclasses.
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Affiliation(s)
- Vinzenz Hofferek
- School of Chemistry, The University of Melbourne, Parkville, VIC, Australia
| | - Huaqi Su
- Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, VIC, Australia.,The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville, VIC, Australia
| | - Gavin E Reid
- School of Chemistry, The University of Melbourne, Parkville, VIC, Australia. .,Department of Biochemistry and Pharmacology, The University of Melbourne, Parkville, VIC, Australia. .,Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC, Australia.
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5
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Žilionis A. Nitrogen-containing cyclic compounds as iminium ion sources for selected reaction monitoring detection of derivatized analytes. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2020; 26:25-35. [PMID: 31426672 DOI: 10.1177/1469066719869817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Liquid chromatography-tandem mass spectrometry is one of the most sensitive tools for determination of trace amounts of analytes in metabolomics and proteomics. The highest sensitivity is achieved in selected reaction monitoring detection, which involves fragmentation of the molecular ion between two levels of mass selection. However, fragmentation of some compounds is complicated. Detection sensitivity of such analytes may be increased by derivatizing them with a specific moiety fragmentation of which results in product ion of high abundance. In this work, we reveal the influence of iminium ions' structures on their stability by comparing six nitrogen-containing cyclic compounds as derivatization reagents for tandem mass spectrometric analysis of amino group-containing analyte. Commercially available starting materials (piperidine, 2,6-dimethylpiperidine, 1-methylpiperazine, morpholine, pyrrolidine and 1-cyanomethyl-3-methylimidazolium ionic liquid) were used for the synthesis of corresponding carboxylic acids which were further used for derivatization of the model analyte tryptamine. Liquid chromatographic-mass spectrometric analysis of differently derivatized tryptamine was performed for the evaluation of release and stability of corresponding iminium ions under collision-induced dissociation conditions. As a result, morpholine moiety was shown being the most promising iminium ion source among tested compounds. Possible sub-fragmentation pathways of investigated iminium ions were discussed, and the structures of secondary product ions were proposed.
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Affiliation(s)
- Andrius Žilionis
- Faculty of Chemistry and Geosciences, Vilnius University, Vilnius, Lithuania
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6
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Sun D, Meng X, Ren T, Fawcett JP, Wang H, Gu J. Establishment of a Charge Reversal Derivatization Strategy to Improve the Ionization Efficiency of Limaprost and Investigation of the Fragmentation Patterns of Limaprost Derivatives Via Exclusive Neutral Loss and Survival Yield Method. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:1365-1375. [PMID: 29633222 DOI: 10.1007/s13361-018-1924-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/04/2018] [Accepted: 02/04/2018] [Indexed: 06/08/2023]
Abstract
Sensitivity is generally an issue in bioassays of prostaglandins and their synthetic analogs due to their extremely low concentration in vivo. To improve the ionization efficiency of limaprost, an oral prostaglandin E1 (PGE1) synthetic analog, we investigated a charge reversal derivatization strategy in electrospray ionization mass spectrometry (ESI-MS). We established that the cholamine derivative exhibits much greater signal intensity in the positive-ion mode compared with limaprost in the negative ion mode. Collision-induced dissociation (CID) involved exclusive neutral mass loss and positive charge migration to form stable cationic product ions with the positive charge on the limaprost residue rather than on the modifying group. This has the effect of maintaining the efficiency and specificity of multiple reaction monitoring (MRM) and avoiding cross talk. CID fragmentation patterns of other limaprost derivatives allowed us to relate the dissociation tendency of different neutral leaving groups to an internal energy distribution scale based on the survival yield method. Knowledge of the energy involved in the production of stabilized positive ions will potentially assist the selection of suitable derivatization reagents for the analysis of a wide variety of lipid acids. Graphical Abstract ᅟ.
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Affiliation(s)
- Dong Sun
- Research Center for Drug Metabolism, Jilin University, Changchun, 130012, People's Republic of China
- Beijing Xiuzheng Innovation Medicine Research Institute Co. Ltd., Beijing, 102209, People's Republic of China
| | - Xiangjun Meng
- School of Life Sciences, Jilin University, Changchun, 130012, People's Republic of China
| | - Tianming Ren
- School of Life Sciences, Jilin University, Changchun, 130012, People's Republic of China
| | - John Paul Fawcett
- School of Pharmacy, University of Otago, P.O. Box 56, Dunedin, New Zealand
| | - Hualu Wang
- Beijing Xiuzheng Innovation Medicine Research Institute Co. Ltd., Beijing, 102209, People's Republic of China
| | - Jingkai Gu
- Research Center for Drug Metabolism, Jilin University, Changchun, 130012, People's Republic of China.
- School of Life Sciences, Jilin University, Changchun, 130012, People's Republic of China.
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7
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Polasky DA, Lermyte F, Nshanian M, Sobott F, Andrews PC, Loo JA, Ruotolo BT. Fixed-Charge Trimethyl Pyrilium Modification for Enabling Enhanced Top-Down Mass Spectrometry Sequencing of Intact Protein Complexes. Anal Chem 2018; 90:2756-2764. [PMID: 29360341 PMCID: PMC6340295 DOI: 10.1021/acs.analchem.7b04806] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mass spectrometry of intact proteins and protein complexes has the potential to provide a transformative level of information on biological systems, ranging from sequence and post-translational modification analysis to the structures of whole protein assemblies. This ambitious goal requires the efficient fragmentation of both intact proteins and the macromolecular, multicomponent machines they collaborate to create through noncovalent interactions. Improving technologies in an effort to achieve such fragmentation remains perhaps the greatest challenge facing current efforts to comprehensively analyze cellular protein composition and is essential to realizing the full potential of proteomics. In this work, we describe the use of a trimethyl pyrylium (TMP) fixed-charge covalent labeling strategy aimed at enhancing fragmentation for challenging intact proteins and intact protein complexes. Combining analysis of TMP-modified and unmodified protein complexes results in a greater diversity of regions within the protein that give rise to fragments, and results in an up to 2.5-fold increase in sequence coverage when compared to unmodified protein alone, for protein complexes up to 148 kDa. TMP modification offers a simple and powerful platform to expand the capabilities of existing mass spectrometric instrumentation for the complete characterization of intact protein assemblies.
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Affiliation(s)
- Daniel A. Polasky
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI 48109
| | - Frederik Lermyte
- ♯ Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Michael Nshanian
- ‡ Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA 90095
| | - Frank Sobott
- ♯ Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
- ° The Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK
- + School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Phillip C. Andrews
- ‖ Department of Biological Chemistry, University of Michigan, 1150 W. Medical Center Dr., Ann Arbor MI, 48109
| | - Joseph A. Loo
- ‡ Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA 90095
- § Department of Biological Chemistry, David Geffen School of Medicine, and UCLA/DOE Institute for Genomics and Proteomics, University of California Los Angeles, Los Angeles, CA 90095
| | - Brandon T. Ruotolo
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, MI 48109
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8
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Vušurović J, Schneeberger E, Breuker K. Interactions of Protonated Guanidine and Guanidine Derivatives with Multiply Deprotonated RNA Probed by Electrospray Ionization and Collisionally Activated Dissociation. ChemistryOpen 2017; 6:739-750. [PMID: 29226062 PMCID: PMC5715244 DOI: 10.1002/open.201700143] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 10/06/2017] [Indexed: 11/25/2022] Open
Abstract
Interactions of ribonucleic acid (RNA) with guanidine and guanidine derivatives are important features in RNA-protein and RNA-drug binding. Here we have investigated noncovalently bound complexes of an 8-nucleotide RNA and six different ligands, all of which have a guanidinium moiety, by using electrospray ionization (ESI) and collisionally activated dissociation (CAD) mass spectrometry (MS). The order of complex stability correlated almost linearly with the number of ligand atoms that can potentially be involved in hydrogen-bond or salt-bridge interactions with the RNA, but not with the proton affinity of the ligands. However, ligand dissociation of the complex ions in CAD was generally accompanied by proton transfer from ligand to RNA, which indicated conversion of salt-bridge into hydrogen-bond interactions. The relative stabilities and dissociation pathways of [RNA+m L-n H] n- complexes with different stoichiometries (m=1-5) and net charge (n= 2-5) revealed both specific and unspecific ligand binding to the RNA.
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Affiliation(s)
- Jovana Vušurović
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI)University of InnsbruckInnrain 80–826020InnsbruckAustria
| | - Eva‐Maria Schneeberger
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI)University of InnsbruckInnrain 80–826020InnsbruckAustria
| | - Kathrin Breuker
- Institute of Organic Chemistry and Center for Molecular Biosciences Innsbruck (CMBI)University of InnsbruckInnrain 80–826020InnsbruckAustria
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9
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Madsen JA, Yin Y, Qiao J, Gill V, Renganathan K, Fu WY, Smith S, Anderson J. Covalent Labeling Denaturation Mass Spectrometry for Sensitive Localized Higher Order Structure Comparisons. Anal Chem 2016; 88:2478-88. [PMID: 26750983 DOI: 10.1021/acs.analchem.5b04736] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein higher order structure (HOS) describes the three-dimensional folding arrangement of a given protein and plays critical roles in structure/function relationships. As such, it is a key product quality attribute that is monitored during biopharmaceutical development. Covalent labeling of surface residues, combined with mass spectrometry analysis, has increasingly played an important role in characterizing localized protein HOS. Since the label can potentially induce conformation changes, protocols generally use a small amount of label to ensure that the integrity of the protein HOS is not disturbed. The present study, however, describes a method that purposely uses high amounts of isobaric label (levels that induce denaturation) to enhance the sensitivity and resolution for detecting localized structural differences between two or more biological products. The method proved to be highly discriminative, detecting differences in HOS affecting as little as 2.5-5% of the molecular population, levels at which circular dichroism and nuclear magnetic resonance spectroscopy fingerprinting, both gold standard HOS techniques, were unable to adequately differentiate. The methodology was shown to have comparable sensitivity to differential scanning calorimetry for detecting HOS differences. In addition, the workflow presented herein can also quantify other product attributes such as post-translational modifications and site-specific glycosylation, using a single liquid chromatography-tandem mass spectrometry (LC-MS/MS) run with automated data analysis. We applied this technique to characterize a large (>90 kDa), multiply glycosylated therapeutic protein under different heat stress conditions and aggregation states.
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Affiliation(s)
- James A Madsen
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
| | - Yan Yin
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
| | - Jing Qiao
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
| | - Vanessa Gill
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
| | | | - Wing-Yee Fu
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
| | - Stephen Smith
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
| | - James Anderson
- Momenta Pharmaceuticals, 675 West Kendall Street, Cambridge, Massachusetts 02142, United States
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10
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Zhou X, Mester C, Stemmer PM, Reid GE. Oxidation-induced conformational changes in calcineurin determined by covalent labeling and tandem mass spectrometry. Biochemistry 2014; 53:6754-65. [PMID: 25286016 PMCID: PMC4222536 DOI: 10.1021/bi5009744] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The Ca2+/calmodulin activated
phosphatase, calcineurin,
is inactivated by H2O2 or superoxide-induced
oxidation, both in vivo and in vitro. However, the potential for global and/or local conformation changes
occurring within calcineurin as a function of oxidative modification,
that may play a role in the inactivation process, has not been examined.
Here, the susceptibility of calcineurin methionine residues toward
H2O2-induced oxidation were determined using
a multienzyme digestion strategy coupled with capillary HPLC–electrospray
ionization mass spectrometry and tandem mass spectrometry analysis.
Then, regions within the protein complex that underwent significant
conformational perturbation upon oxidative modification were identified
by monitoring changes in the modification rates of accessible lysine
residues between native and oxidized forms of calcineurin, using an
amine-specific covalent labeling reagent, S,S′-dimethylthiobutanoylhydroxysuccinimide ester (DMBNHS),
and tandem mass spectrometry. Importantly, methionine residues found
to be highly susceptible toward oxidation, and the lysine residues
exhibiting large increases in accessibility upon oxidation, were all
located in calcineurin functional domains involved in Ca2+/CaM binding regulated calcineurin stimulation. These findings therefore
provide initial support for the novel mechanistic hypothesis that
oxidation-induced global and/or local conformational changes within
calcineurin contribute to inactivation via (i) impairing the interaction
between calcineurin A and calcineurin B, (ii) altering the low-affinity
Ca2+ binding site in calcineurin B, (iii) inhibiting calmodulin
binding to calcineurin A, and/or (iv) by altering the affinity between
the calcineurin A autoinhibitory domain and the catalytic center.
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Affiliation(s)
- Xiao Zhou
- Department of Chemistry, and §Department of Biochemistry and Molecular Biology, Michigan State University , East Lansing, Michigan 48824, United States
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11
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O'Brien JP, Mayberry LK, Murphy PA, Browning KS, Brodbelt JS. Evaluating the conformation and binding interface of cap-binding proteins and complexes via ultraviolet photodissociation mass spectrometry. J Proteome Res 2013; 12:5867-77. [PMID: 24200290 DOI: 10.1021/pr400869u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We report the structural analysis of cap-binding proteins using a chemical probe/ultraviolet photodissociation (UVPD) mass spectrometry strategy for evaluating solvent accessibility of proteins. Our methodology utilized a chromogenic probe (NN) to probe the exposed amine residues of wheat eukaryotic translation initiation factor 4E (eIF4E), eIF4E in complex with a fragment of eIF4G ("mini-eIF4F"), eIF4E in complex with full length eIF4G, and the plant specific cap-binding protein, eIFiso4E. Structural changes of eIF4E in the absence and presence of excess dithiothreitol and in complex with a fragment of eIF4G or full-length eIF4G are mapped. The results indicate that there are particular lysine residues whose environment changes in the presence of dithiothreitol or eIF4G, suggesting that changes in the structure of eIF4E are occurring. On the basis of the crystal structure of wheat eIF4E and a constructed homology model of the structure for eIFiso4E, the reactivities of lysines in each protein are rationalized. Our results suggest that chemical probe/UVPD mass spectrometry can successfully predict dynamic structural changes in solution that are consistent with known crystal structures. Our findings reveal that the binding of m(7)GTP to eIF4E and eIFiso4E appears to be dependent on the redox state of a pair of cysteines near the m(7)GTP binding site. In addition, tertiary structural changes of eIF4E initiated by the formation of a complex containing a fragment of eIF4G and eIF4E were observed.
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Affiliation(s)
- John P O'Brien
- Department of Chemistry and Biochemistry and ‡Institute for Cell and Molecular Biology, The University of Texas at Austin , 1 University Station A5300, Austin, Texas 78712, United States
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12
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O'Brien JP, Pruet JM, Brodbelt JS. Chromogenic chemical probe for protein structural characterization via ultraviolet photodissociation mass spectrometry. Anal Chem 2013; 85:7391-7. [PMID: 23855605 DOI: 10.1021/ac401305f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A chemical probe/ultraviolet photodissociation (UVPD) mass spectrometry strategy for evaluating structures of proteins and protein complexes is reported, as demonstrated for lysozyme and beta-lactoglobulin with and without bound ligands. The chemical probe, NN, incorporates a UV chromophore that endows peptides with high cross sections at 351 nm, a wavelength not absorbed by unmodified peptides. Thus, NN-modified peptides can readily be differentiated from nonmodified peptides in complex tryptic digests created upon proteolysis of proteins after their exposure to the NN chemical probe. The NN chemical probe also affords two diagnostic reporter ions detected upon UVPD of the NN-modified peptide that provides a facile method for the identification of NN peptides within complex mixtures. Quantitation of the modified and unmodified peptides allows estimation of the surface accessibilities of lysine residues based on their relative reactivities with the NN chemical probe.
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Affiliation(s)
- John P O'Brien
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, TX 78712, United States
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Fhaner CJ, Liu S, Zhou X, Reid GE. Functional group selective derivatization and gas-phase fragmentation reactions of plasmalogen glycerophospholipids. Mass Spectrom (Tokyo) 2013; 2:S0015. [PMID: 24349934 DOI: 10.5702/massspectrometry.s0015] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 11/15/2012] [Indexed: 01/06/2023] Open
Abstract
A reaction strategy involving functional group selective modification of the O-alkenyl-ether double bond within plasmenyl ether containing lipids using iodine and methanol, in conjunction with functional group selective derivatization of amine-containing lipids using a novel (13)C1-S,S'-dimethylthiobutanoylhydroxysuccinimide ester ((13)C1-DMBNHS) reagent, is shown to improve the capabilities of 'shotgun' high resolution/accurate mass spectrometry for comprehensive lipidome analysis. Importantly, the characteristic mass shifts introduced as a result of these derivatization reactions enables the resolution and unambiguous identification of isobaric mass plasmenyl- and plasmanyl-ether containing lipid species from within crude complex lipid extracts, without need for chromatographic fractionation or additional lipid extraction steps prior to analysis. Additionally, the positive ionization mode tandem mass spectrometry fragmentation behavior of the derivatized plasmenyl ether containing glycerophosphocholine and glycerophosphoethanolamine lipids are shown to yield abundant characteristic product ions that directly enable the assignment of their molecular lipid identities.
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Affiliation(s)
| | | | | | - Gavin E Reid
- Department of Chemistry ; Department of Biochemistry and Molecular Biology, Michigan State University
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14
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Deperalta G, Alvarez M, Bechtel C, Dong K, McDonald R, Ling V. Structural analysis of a therapeutic monoclonal antibody dimer by hydroxyl radical footprinting. MAbs 2012; 5:86-101. [PMID: 23247543 DOI: 10.4161/mabs.22964] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Hydroxyl radical footprinting is a covalent labeling strategy used to probe the conformational properties of proteins in solution. We describe the first application of this high resolution technique for characterizing the structure of a therapeutic monoclonal antibody (mAb) dimer. As monitored by size-exclusion chromatography (SEC), therapeutic mAbs typically contain small amounts of a dimer species relative to the primary monomeric form in its drug substance or drug product. To determine its structural orientation, a sample enriched in an IgG1 mAb dimer was oxidized by hydroxyl radicals generated by exposure of the aqueous solution to synchrotron X-rays in millisecond timescales. The antibody monomer that served as a control was oxidized in a similar fashion. The oxidized samples were digested with trypsin and analyzed by RP-UHPLC-MS. The footprinting data show that peptides displaying decreased rates of oxidation (i.e., regions of increased protection) in the dimer are localized in the light and heavy chains of the Fab domain. The interface region for the monomers comprising the dimer was thus inferred to be between their Fab arms, allowing us to model two possible theoretical dimer orientations: a head-to-head, single arm-bound Fab-to-Fab dimer, and a head-to-head, double arm-bound Fab (') 2-to-Fab (') 2 dimer. Lower resolution fragment-SEC analysis of the dimer and monomer samples treated with papain or FabRICATOR enzyme provided complimentary evidence to support the Fab/Fab orientation of the IgG1 dimer.
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Affiliation(s)
- Galahad Deperalta
- Protein Analytical Chemistry, Genentech, Inc., South San Francisco, CA, USA.
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15
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Fhaner CJ, Liu S, Ji H, Simpson RJ, Reid GE. Comprehensive lipidome profiling of isogenic primary and metastatic colon adenocarcinoma cell lines. Anal Chem 2012; 84:8917-26. [PMID: 23039336 DOI: 10.1021/ac302154g] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A "shotgun" lipidomics strategy consisting of sequential functional group selective chemical modification reactions coupled with high-resolution/accurate mass spectrometry and "targeted" tandem mass spectrometry (MS/MS) analysis has been developed and applied toward the comprehensive identification, characterization and quantitative analysis of changes in relative abundances of >600 individual glycerophospholipid, glycerolipid, sphingolipid and sterol lipids between a primary colorectal cancer (CRC) cell line, SW480, and its isogenic lymph node metastasized derivative, SW620. Selective chemical derivatization of glycerophosphoethanolamine and glycerophosphoserine lipids using a "fixed charge" sulfonium ion containing, d(6)-S,S'-dimethylthiobutanoylhydroxysuccinimide ester (d(6)-DMBNHS) reagent was used to eliminate the possibility of isobaric mass overlap of these species with the precursor ions of all other lipids in the crude extracts, thereby enabling their unambiguous assignment, while subsequent selective mild acid hydrolysis of plasmenyl (vinyl-ether) containing lipids using formic acid enabled these species to be readily differentiated from isobaric mass plasmanyl (alkyl-ether) containing lipids. Using this approach, statistically significant differences in the abundances of numerous lipid species previously identified as being associated with cancer progression or that play known roles as mediators in a range of physiological and pathological processes were observed between the SW480 and SW620 cells. Most notably, these included increased plasmanylcholine and triglyceride lipid levels, decreased plasmenylethanolamine lipids, decreased C-16 containing sphingomyelin and ceramide lipid levels, and a dramatic increase in the abundances of total cholesterol ester and triglyceride lipids in the SW620 cells compared to those in the SW480 cells.
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Affiliation(s)
- Cassie J Fhaner
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
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16
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Xu M, Yang L, Wang Q. A Way to Probe the Microenvironment of Free Sulfhydryls in Intact Proteins with a Series of Monofunctional Organic Mercurials. Chemistry 2012; 18:13989-93. [DOI: 10.1002/chem.201200901] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 08/08/2012] [Indexed: 11/10/2022]
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17
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Lu Y, Zhou X, Stemmer PM, Reid GE. Sulfonium ion derivatization, isobaric stable isotope labeling and data dependent CID- and ETD-MS/MS for enhanced phosphopeptide quantitation, identification and phosphorylation site characterization. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2012; 23:577-93. [PMID: 21952753 PMCID: PMC4228788 DOI: 10.1007/s13361-011-0190-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 06/03/2011] [Accepted: 06/03/2011] [Indexed: 05/12/2023]
Abstract
An amine specific peptide derivatization strategy involving the use of novel isobaric stable isotope encoded 'fixed charge' sulfonium ion reagents, coupled with an analysis strategy employing capillary HPLC, ESI-MS, and automated data dependent ion trap CID-MS/MS, -MS(3), and/or ETD-MS/MS, has been developed for the improved quantitative analysis of protein phosphorylation, and for identification and characterization of their site(s) of modification. Derivatization of 50 synthetic phosphopeptides with S,S'-dimethylthiobutanoylhydroxysuccinimide ester iodide (DMBNHS), followed by analysis using capillary HPLC-ESI-MS, yielded an average 2.5-fold increase in ionization efficiencies and a significant increase in the presence and/or abundance of higher charge state precursor ions compared to the non-derivatized phosphopeptides. Notably, 44% of the phosphopeptides (22 of 50) in their underivatized states yielded precursor ions whose maximum charge states corresponded to +2, while only 8% (4 of 50) remained at this maximum charge state following DMBNHS derivatization. Quantitative analysis was achieved by measuring the abundances of the diagnostic product ions corresponding to the neutral losses of 'light' (S(CH(3))(2)) and 'heavy' (S(CD(3))(2)) dimethylsulfide exclusively formed upon CID-MS/MS of isobaric stable isotope labeled forms of the DMBNHS derivatized phosphopeptides. Under these conditions, the phosphate group stayed intact. Access for a greater number of peptides to provide enhanced phosphopeptide sequence identification and phosphorylation site characterization was achieved via automated data-dependent CID-MS(3) or ETD-MS/MS analysis due to the formation of the higher charge state precursor ions. Importantly, improved sequence coverage was observed using ETD-MS/MS following introduction of the sulfonium ion fixed charge, but with no detrimental effects on ETD fragmentation efficiency.
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Affiliation(s)
- Yali Lu
- Department of Chemistry, Michigan State University, 229 Chemistry Building, Michigan State University, East Lansing, MI, 48824, USA
| | - Xiao Zhou
- Department of Chemistry, Michigan State University, 229 Chemistry Building, Michigan State University, East Lansing, MI, 48824, USA
| | - Paul M. Stemmer
- Institute of Environmental Health Sciences, Wayne State University, Detroit, MI, USA
| | - Gavin E. Reid
- Department of Chemistry, Michigan State University, 229 Chemistry Building, Michigan State University, East Lansing, MI, 48824, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA
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18
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Vasicek L, O'Brien JP, Browning KS, Tao Z, Liu HW, Brodbelt JS. Mapping protein surface accessibility via an electron transfer dissociation selectively cleavable hydrazone probe. Mol Cell Proteomics 2012; 11:O111.015826. [PMID: 22393264 DOI: 10.1074/mcp.o111.015826] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A protein's surface influences its role in protein-protein interactions and protein-ligand binding. Mass spectrometry can be used to give low resolution structural information about protein surfaces and conformations when used in combination with derivatization methods that target surface accessible amino acid residues. However, pinpointing the resulting modified peptides upon enzymatic digestion of the surface-modified protein is challenging because of the complexity of the peptide mixture and low abundance of modified peptides. Here a novel hydrazone reagent (NN) is presented that allows facile identification of all modified surface residues through a preferential cleavage upon activation by electron transfer dissociation coupled with a collision activation scan to pinpoint the modified residue in the peptide sequence. Using this approach, the correlation between percent reactivity and surface accessibility is demonstrated for two biologically active proteins, wheat eIF4E and PARP-1 Domain C.
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Affiliation(s)
- Lisa Vasicek
- Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA
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19
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Wang J, Zhang J, Arbogast B, Maier CS. Tandem mass spectrometric characterization of thiol peptides modified by the chemoselective cationic sulfhydryl reagent (4-iodobutyl)triphenylphosphonium--effects of a cationic thiol derivatization on peptide fragmentation. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2011; 22:1771-83. [PMID: 21952891 PMCID: PMC3187551 DOI: 10.1007/s13361-011-0192-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 05/18/2011] [Accepted: 06/08/2011] [Indexed: 05/24/2023]
Abstract
Fixed charge chemical modifications on peptides and proteins can impact fragmentation behaviors in tandem mass spectrometry (MS/MS). In this study, we employed a thiol-specific cationic alkylation reagent, (4-iodobutyl)triphenylphosphonium (IBTP), to selectively modify cysteine thiol groups in mitochondrial proteome samples. Tandem mass spectrometric characteristics of butyltriphenylphosphonium (BTP)-modified peptides were evaluated by comparison to their carbamidomethylated (CAM) analogues using a quadrupole time-of-flight (Q-TOF) instrument under low energy collision-induced dissociation (CID) conditions. Introduction of the fixed charge modification resulted in the observation of peptide and fragment (b(n) and y(n)) ions with higher charge states than those observed for CAM-modified analogues. The charged BTP moiety had a significant effect on the neighboring amide bond fragmentation products. A decrease in relative abundances of the product ions at the corresponding cleavage sites was observed compared with those from the CAM-modified derivatives. This effect was particularly noticeable when an Xxx-Pro bond was in the vicinity of a BTP group. We hypothesized that the presence of a phosphonium moiety will reduce the tendency for protonation of the proximal amide bonds in the peptide backbone. Indeed, calculations indicated that proton affinities of backbone amide bonds close to the modified cysteine residues were generally 20-50 kcal/mol lower for BTP-modified peptides than for the unmodified or CAM-modified analogues with the sequence motif -Ala-Cys-Ala(n)-Ala(2)-, -Ala-Cys-Ala(n)-Pro-Ala-, and -Ala-Pro-Ala(n)-Cys-Ala-, n=0-3.
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Affiliation(s)
- Jing Wang
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Jie Zhang
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | | | - Claudia S. Maier
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
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20
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Pan Y, Brown L, Konermann L. Site-directed mutagenesis combined with oxidative methionine labeling for probing structural transitions of a membrane protein by mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2010; 21:1947-1956. [PMID: 20829064 DOI: 10.1016/j.jasms.2010.08.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 08/06/2010] [Accepted: 08/09/2010] [Indexed: 05/29/2023]
Abstract
Exposure of the membrane protein bacteriorhodopsin (BR) to SDS induces partial breakdown of the native conformation. The exact structural properties of this SDS state remain a matter of debate, despite its widespread use in BR folding experiments. The current work employs hydroxyl radical (·OH) labeling in conjunction with mass spectrometry (MS)-based peptide mapping for probing the solvent accessibility of individual BR segments in the presence of SDS. Previous work revealed methionine sulfoxide formation to be the dominant oxidative pathway. Those data suggested extensive unfolding of helices A and D in SDS. Unfortunately, the lack of Met residues in helices C and F implies that no direct information on the behavior of the latter two elements could be obtained. Here, we address this problem by employing two variants with additional Met residues, L93M (helix C) and V179M (helix F). The oxidation behavior of the resulting 11 methionines can be grouped into three categories: (1) extensively labeled both in native BR and in SDS (loop residues M32, M68, and M163); (2) protected in the native state but not in SDS (M20, M118); (3) always protected (M56, M60, M93, M145, M179, M209). These data show that a solvent-inaccessible core is retained in SDS. This core consists of partially intact helices B, C, E, F, and G. The termini of these helices are highly dynamic and/or unraveled, particularly on the cytoplasmic side. Overall, this work demonstrates how the use of engineered ·OH labeling sites can provide insights into structural properties of membrane proteins.
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Affiliation(s)
- Yan Pan
- Department of Chemistry, University of Western Ontario, London, Ontario, Canada
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