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Wang H, Chung-Davidson YW, Li W. Identification and quantification of sea lamprey gonadotropin-releasing hormones by electrospray ionization tandem mass spectrometry. J Chromatogr A 2014; 1345:98-106. [PMID: 24768126 DOI: 10.1016/j.chroma.2014.04.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/08/2014] [Accepted: 04/08/2014] [Indexed: 10/25/2022]
Abstract
Gonadotropin-releasing hormones (GnRH) are neuropeptide hormones that regulate reproduction in vertebrates. Twenty-five unique chordate GnRH isoforms have been identified, all with very similar molecular architecture. Identification and quantification of endogenous GnRH in biological samples is extremely challenging due to the high levels of sequence similarity among these GnRH peptides and complexity of the biological matrices laden with large numbers of other peptides and protein degradation fragments, and due to low levels of GnRH abundance. In this study, three lamprey GnRH (lGnRH-I, -II, and -III) were extracted from sea lamprey brain tissue and plasma samples by solid-phase extraction (SPE) and identified by a high resolution Q-TOF mass spectrometry (MS). A rapid quantitation method was developed and validated to determine the concentrations of these three lGnRHs by using a UPLC coupled tandem MS in positive ESI multiple reaction monitoring (MRM) mode. Luteinizing hormone-release hormone (LHRH, one of the mammalian GnRHs) was used as the internal standard. The developed quantitation method was fully validated for its recovery, matrix effect, linearity, repeatability, precision and accuracy, and storage stability. This method exhibited excellent linearity in a broad concentration range for all three lGnRHs (R(2)>0.99) and limits of detection (LOD; as low as 0.007 ng/mL). Brain and plasma samples from a total of 280 sea lampreys were analyzed with the developed method to investigate the biological relevance of the lGnRH levels. The concentrations of these three lGnRHs were detected at levels of pictogram per microgram brain tissue and milliliter of plasma. The obtained analytical performance parameters and collected data from real biological samples have proven that this is a robust, sensitive, and fully validated LC-MS/MS method to simultaneously quantify three neuropeptide hormones in complex biological matrices.
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Affiliation(s)
- Huiyong Wang
- Department of Fisheries and Wildlife, Michigan State University, Room 13 Natural Resources Building, 480 Wilson Road, East Lansing, MI 48824, USA
| | - Yu-Wen Chung-Davidson
- Department of Fisheries and Wildlife, Michigan State University, Room 13 Natural Resources Building, 480 Wilson Road, East Lansing, MI 48824, USA
| | - Weiming Li
- Department of Fisheries and Wildlife, Michigan State University, Room 13 Natural Resources Building, 480 Wilson Road, East Lansing, MI 48824, USA.
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Thannhauser TW, Shen M, Sherwood R, Howe K, Fish T, Yang Y, Chen W, Zhang S. A workflow for large-scale empirical identification of cell wall N-linked glycoproteins of tomato (Solanum lycopersicum) fruit by tandem mass spectrometry. Electrophoresis 2013; 34:2417-31. [PMID: 23580464 PMCID: PMC4545257 DOI: 10.1002/elps.201200656] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 01/11/2013] [Accepted: 01/24/2013] [Indexed: 11/09/2022]
Abstract
Glycosylation is a common PTM of plant proteins that impacts a large number of important biological processes. Nevertheless, the impacts of differential site occupancy and the nature of specific glycoforms are obscure. Historically, characterization of glycoproteins has been difficult due to the distinct physicochemical properties of the peptidyl and glycan moieties, the variable and dynamic nature of the glycosylation process, their heterogeneous nature, and the low relative abundance of each glycoform. In this study, we explore a new pipeline developed for large-scale empirical identification of N-linked glycoproteins of tomato fruit as part of our ongoing efforts to characterize the tomato secretome. The workflow presented involves a combination of lectin affinity, tryptic digestion, ion-pairing HILIC, and precursor ion-driven data-dependent MS/MS analysis with a script to facilitate the identification and characterization of occupied N-linked glycosylation sites. A total of 212 glycoproteins were identified in this study, in which 26 glycopeptides from 24 glycoproteins were successfully characterized in just one HILIC fraction. Further precursor ion discovery-based MS/MS and deglycosylation followed by high accuracy and resolution MS analysis were used to confirm the glycosylation sites and determine site occupancy rates. The workflow reported is robust and capable of producing large amounts of empirical data involving N-linked glycosylation sites and their associated glycoforms.
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Affiliation(s)
- Theodore W. Thannhauser
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY
| | - Miaoqing Shen
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY
| | - Robert Sherwood
- Institute for Biotechnology and Life Science Technologies, Cornell University, Ithaca, NY
| | - Kevin Howe
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY
| | - Tara Fish
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY
| | - Yong Yang
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Cornell University, Ithaca, NY
| | - Wei Chen
- Institute for Biotechnology and Life Science Technologies, Cornell University, Ithaca, NY
| | - Sheng Zhang
- Institute for Biotechnology and Life Science Technologies, Cornell University, Ithaca, NY
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Russo R, Severino V, Mendez A, Lliberia J, Parente A, Chambery A. Detection of buffalo mozzarella adulteration by an ultra-high performance liquid chromatography tandem mass spectrometry methodology. JOURNAL OF MASS SPECTROMETRY : JMS 2012; 47:1407-1414. [PMID: 23147815 DOI: 10.1002/jms.3064] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Over the past years, LC-MS-based approaches have gained a growing interest in food analysis by using different platforms and methodologies. In particular, enhanced selectivity and sensitivity of multiple reaction monitoring (MRM) scan function offer powerful capabilities in detecting and quantifying specific analytes within complex mixtures such as food matrices. The MRM approach, traditionally applied in biomedical research, is particularly suitable for the detection of food adulteration and for the verification of authenticity to assure food safety and quality, both recognized as top priorities by the European Union Commission. Increasingly stringent legislation ensure products safety along every step 'from farm to fork', especially for traditional foods designed with the Protected Designation of Origin certification. Therefore, there is a growing demand of new methodologies for defining food authenticity in order to preserve their unique traits against frauds. In this work, an ultra performance liquid chromatopgraphy-electrospray ionization-tandem mass spectrometry (MS/MS) methodology based on MRM has been developed for the sensitive and selective detection of buffalo mozzarella adulteration. The targeted quantitative analysis was performed by monitoring specific transitions of the phosphorylated β-casein f33-48 peptide, identified as a novel species-specific proteotypic marker. The high sensitivity of MRM-based MS and the wide dynamic range of triple quadrupole spectrometers have proved to be a valuable tool for the analysis of food matrices such as dairy products, thus offering new opportunities for monitoring food quality and adulterations.
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Affiliation(s)
- Rosita Russo
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Caserta, Italy
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Rocco M, Malorni L, Cozzolino R, Palmieri G, Rozzo C, Manca A, Parente A, Chambery A. Proteomic Profiling of Human Melanoma Metastatic Cell Line Secretomes. J Proteome Res 2011; 10:4703-14. [DOI: 10.1021/pr200511f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Micaela Rocco
- Department of Life Sciences, Via Vivaldi 43, Second University of Naples, I-81100 Caserta, Italy
| | - Livia Malorni
- Proteomic and Biomolecular Mass Spectrometry Center, Institute of Food Science and Technology, National Research Council (CNR), Via Roma 64, I-83100 Avellino, Italy
| | - Rosaria Cozzolino
- Proteomic and Biomolecular Mass Spectrometry Center, Institute of Food Science and Technology, National Research Council (CNR), Via Roma 64, I-83100 Avellino, Italy
| | - Giuseppe Palmieri
- Unit of Cancer Genetics, Institute of Biomolecular Chemistry, National Research Council (CNR), Traversa La Crucca 3, Baldinca Li Punti, I-07100 Sassari, Italy
| | - Carla Rozzo
- Unit of Cancer Genetics, Institute of Biomolecular Chemistry, National Research Council (CNR), Traversa La Crucca 3, Baldinca Li Punti, I-07100 Sassari, Italy
| | - Antonella Manca
- Unit of Cancer Genetics, Institute of Biomolecular Chemistry, National Research Council (CNR), Traversa La Crucca 3, Baldinca Li Punti, I-07100 Sassari, Italy
| | - Augusto Parente
- Department of Life Sciences, Via Vivaldi 43, Second University of Naples, I-81100 Caserta, Italy
| | - Angela Chambery
- Department of Life Sciences, Via Vivaldi 43, Second University of Naples, I-81100 Caserta, Italy
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Chambery A, Di Maro A, Sanges C, Severino V, Tarantino M, Lamberti A, Parente A, Arcari P. Improved procedure for protein binder analysis in mural painting by LC-ESI/Q-q-TOF mass spectrometry: detection of different milk species by casein proteotypic peptides. Anal Bioanal Chem 2009; 395:2281-91. [DOI: 10.1007/s00216-009-3183-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Revised: 09/11/2009] [Accepted: 09/21/2009] [Indexed: 11/30/2022]
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Quantification of thyrotropin-releasing hormone by liquid chromatography–electrospray mass spectrometry. Amino Acids 2009; 38:1031-41. [DOI: 10.1007/s00726-009-0311-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Accepted: 05/27/2009] [Indexed: 12/20/2022]
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Di Maro A, Chambery A, Carafa V, Costantini S, Colonna G, Parente A. Structural characterization and comparative modeling of PD-Ls 1–3, type 1 ribosome-inactivating proteins from summer leaves of Phytolacca dioica L. Biochimie 2009; 91:352-63. [DOI: 10.1016/j.biochi.2008.10.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2008] [Accepted: 10/16/2008] [Indexed: 11/29/2022]
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Chambery A, Parente A, Topo E, Garcia-Fernàndez J, D'Aniello S. Characterization and putative role of a type I gonadotropin-releasing hormone in the cephalochordate amphioxus. Endocrinology 2009; 150:812-20. [PMID: 18927217 DOI: 10.1210/en.2008-1066] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
GnRH, originally isolated from mammalian hypothalamus, is a key player in the control of vertebrate reproduction. Employing reverse-phase chromatography, we purified a peptide of relative molecular mass of 1182.60 Da from the cephalochordate amphioxus Branchiostoma lanceolatum. We found that its amino acid sequence (pGlu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH(2)) was identical to that of mammalian GnRH. The highest concentrations (4.04 +/- 0.3 microg/g tissue), localized in the anterior part of the body, occurred in November, a time when amphioxus gonads prepare for the seasonal spawning. Furthermore, the biological activity of amphioxus GnRH was investigated by examining its capability to elicit LH release from the rodent pituitary gland. The origins of GnRH can be traced back to the origins of chordates. The seasonal variations of amphioxus GnRH also suggest an ancient role of this peptide in the control of reproduction in chordates, even before the evolution of a proper pituitary gland.
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Affiliation(s)
- Angela Chambery
- Dipartimento di Scienze della Vita, Seconda Università di Napoli, Caserta, Italy.
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Chambery A, Di Maro A, Parente A. Primary structure and glycan moiety characterization of PD-Ss, type 1 ribosome-inactivating proteins from Phytolacca dioica L. seeds, by precursor ion discovery on a Q-TOF mass spectrometer. PHYTOCHEMISTRY 2008; 69:1973-1982. [PMID: 18514239 DOI: 10.1016/j.phytochem.2008.04.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 04/01/2008] [Accepted: 04/08/2008] [Indexed: 05/26/2023]
Abstract
Seeds from Phytolacca dioica L. contain at least three N-glycosylated PD-Ss, type 1 ribosome-inactivating proteins (RIPs), which were separated and purified to homogeneity by conventional chromatographic techniques. ESI-Q-TOF mass spectrometry provided the accurate M(r) of native PD-S1 and PD-S3 (30957.1 and 29785.1, respectively) and the major form PD-S2 (30753.8). As the amino acid sequence of PD-S2 was already known, its disulfide pairing was determined and found to be Cys34-Cys262 and Cys88-Cys110. Further structural characterization of PD-S1 and PD-S3 (N-terminal sequence determination up to residue 30, amino acid analysis and tryptic peptide mapping) showed that the three PD-Ss shared the entire protein sequence. To explain the different chromatographic behaviour, their glycosylation patterns were characterized by a fast and sensitive mass spectrometry-based approach, applying a precursor ion discovery mode on a Q-TOF mass spectrometer. A standard plant paucidomannosidic N-glycosylation pattern [Hex(3), HexNAc(2), deoxyhexose(1), pentose(1)] was found for PD-S1 and PD-S2 on Asn120. Furthermore, a glycosylation site carrying only a HexNAc residue was identified on Asn112 in PD-S1 and PD-S3. Finally, considering the two disulfide bridges and the glycan moieties, the experimental M(r) values were in agreement with the mass values calculated from the primary structure. The complete characterization of PD-Ss shows the high potential of mass spectrometry to rapidly characterize proteins, widespread in eukaryotes, differing only in their glycosylation motifs.
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Affiliation(s)
- Angela Chambery
- Dipartimento di Scienze della Vita, Seconda Università di Napoli, Caserta, Italy
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