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Gasser C, Garault P, Chervaux C, Monnet V, Faurie JM, Rul F. Co-utilization of saccharides in mixtures: Moving toward a new understanding of carbon metabolism in Streptococcus thermophilus. Food Microbiol 2022; 107:104080. [DOI: 10.1016/j.fm.2022.104080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/23/2022] [Accepted: 06/08/2022] [Indexed: 12/01/2022]
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Salzano AM, Novi G, Arioli S, Corona S, Mora D, Scaloni A. Mono-dimensional blue native-PAGE and bi-dimensional blue native/urea-PAGE or/SDS-PAGE combined with nLC–ESI-LIT-MS/MS unveil membrane protein heteromeric and homomeric complexes in Streptococcus thermophilus. J Proteomics 2013; 94:240-61. [DOI: 10.1016/j.jprot.2013.09.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 09/04/2013] [Accepted: 09/14/2013] [Indexed: 02/06/2023]
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Alduina R, Gallo G, Renzone G, Weber T, Scaloni A, Puglia AM. Novel Amycolatopsis balhimycina biochemical abilities unveiled by proteomics. FEMS Microbiol Lett 2013; 351:209-15. [PMID: 24246022 DOI: 10.1111/1574-6968.12324] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 10/22/2013] [Accepted: 10/28/2013] [Indexed: 12/14/2022] Open
Abstract
Amycolatopsis balhimycina DSM5908 is an actinomycete producer of balhimycin, an analogue of vancomycin, the antibiotic of 'last resort' against multidrug-resistant Gram-positive pathogens. Most knowledge on glycopeptide biosynthetic pathways comes from studies on A. balhimycina as this strain, among glycopeptide producers, is genetically more amenable. The recent availability of its genome sequence allowed to perform differential proteomic analyses elucidating key metabolic pathways leading to antibiotic production in different growth conditions. To implement proteomic data on A. balhimycina derived from 2-DE approaches and to identify novel components, a combined approach based on protein extraction with different detergents, SDS-PAGE resolution of intact proteins and nanoLC-ESI-LIT-MS/MS analysis of their tryptic digests was carried out. With this procedure, 206 additional new proteins such as very basic, hydrophobic or large species were identified. This analysis revealed either components whose expression was previously only inferred by growth conditions, that is, those involved in glutamate metabolism or in resistance, or proteins that allow the strain to metabolize alkanes. These findings will give additional insight into metabolic pathways that could really contribute to A. balhimycina growth and antibiotic production and metabolic enzymes that could be manipulated to generate a model producing strain to use for synthetic biology.
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Affiliation(s)
- Rosa Alduina
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, University of Palermo, Palermo, Italy
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SDS–PAGE patterns of whole cell proteins of Streptococcus thermophilus: impact of strain, growth phase and adaptation and relationship with stress response. World J Microbiol Biotechnol 2011. [DOI: 10.1007/s11274-011-0722-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Arena S, Renzone G, Novi G, Scaloni A. Redox proteomics of fat globules unveils broad protein lactosylation and compositional changes in milk samples subjected to various technological procedures. J Proteomics 2011; 74:2453-75. [PMID: 21256992 DOI: 10.1016/j.jprot.2011.01.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 12/30/2010] [Accepted: 01/10/2011] [Indexed: 12/25/2022]
Abstract
The Maillard reaction between lactose and proteins occurs during thermal treatment of milk and lactosylated β-lactoglobulin, α-lactalbumin and caseins have widely been used to monitor the quality of dairy products. We recently demonstrated that a number of other whey milk proteins essential for nutrient delivery, defense against bacteria/virus and cellular proliferation become lactosylated during milk processing. The extent of their modification is associated with the harshness of product manufacturing. Since fat globule proteins are also highly important for the health-beneficial properties of milk, an evaluation of their lactosylation is crucial for a complete understanding of aliment nutritional characteristics. This is more important when milk is the unique dietary source, as in the infant diet. To this purpose, a sequential proteomic procedure involving an optimized milk fat globule (MFG) preparation/electrophoretic resolution, shot-gun analysis of gel portions for protein identification, selective trapping of lactosylated peptides by phenylboronate chromatography and their analysis by nanoLC-ESI-electron transfer dissociation (ETD) tandem MS was used for systematic characterization of fat globule proteins in milk samples subjected to various manufacturing procedures. Significant MFG protein compositional changes were observed between samples, highlighting the progressive adsorption of caseins and whey proteins on the fat globule surface as result of the technological process used. A significant lactosylation of MFG proteins was observed in ultra-high temperature sterilized and powdered for infant nutrition milk preparations, which well paralleled with the harshness of thermal treatment. Globally, this study allowed the identification of novel 157 non-redundant modification sites and 35 MFG proteins never reported so far as being lactosylated, in addition to the 153 ones ascertained here as present on other 21 MFG-adsorbed proteins whose nature was already characterized. Novel MFG proteins include components involved in nutrient delivery, defense response against pathogens and cellular proliferation/differentiation. Nutritional, biological and toxicological consequences of these findings are here discussed, highlighting their possible impact on children's diet.
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Affiliation(s)
- Simona Arena
- Proteomics & Mass Spectrometry Laboratory, ISPAAM, National Research Council, 80147 Naples, Italy
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Jabbour RE, Deshpande SV, Stanford MF, Wick CH, Zulich AW, Snyder AP. A protein processing filter method for bacterial identification by mass spectrometry-based proteomics. J Proteome Res 2010; 10:907-12. [PMID: 21126090 DOI: 10.1021/pr101086a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A "one-pot" alternative method for processing proteins and isolating peptide mixtures from bacterial samples is presented for liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis and data reduction. The conventional in-solution digestion of the protein contents of bacteria is compared to a small disposable filter unit placed inside a centrifuge vial for processing and digestion of bacterial proteins. Each processing stage allows filtration of excess reactants and unwanted byproduct while retaining the proteins. Upon addition of trypsin, the peptide mixture solution is passed through the filter while retaining the trypsin enzyme. The peptide mixture is then analyzed by LC-MS/MS with an in-house BACid algorithm for a comparison of the experimental unique peptides to a constructed proteome database of bacterial genus, specie, and strain entries. The concentration of bacteria was varied from 10 × 10(7) to 3.3 × 10(3) cfu/mL for analysis of the effect of concentration on the ability of the sample processing, LC-MS/MS, and data analysis methods to identify bacteria. The protein processing method and dilution procedure result in reliable identification of pure suspensions and mixtures at high and low bacterial concentrations.
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Arena S, Renzone G, Novi G, Paffetti A, Bernardini G, Santucci A, Scaloni A. Modern proteomic methodologies for the characterization of lactosylation protein targets in milk. Proteomics 2010; 10:3414-34. [DOI: 10.1002/pmic.201000321] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Dumpala PR, Gülsoy N, Lawrence ML, Karsi A. Proteomic analysis of the fish pathogen Flavobacterium columnare. Proteome Sci 2010; 8:26. [PMID: 20525376 PMCID: PMC2890538 DOI: 10.1186/1477-5956-8-26] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Accepted: 06/04/2010] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Flavobacterium columnare causes columnaris disease in cultured and wild fish populations worldwide. Columnaris is the second most prevalent bacterial disease of commercial channel catfish industry in the United States. Despite its economic importance, little is known about the expressed proteins and virulence mechanisms of F. columnare. Here, we report the first high throughput proteomic analysis of F. columnare using 2-D LC ESI MS/MS and 2-DE MALDI TOF/TOF MS. RESULTS Proteins identified in this study and predicted from the draft F. columnare genome were clustered into functional groups using clusters of orthologous groups (COGs), and their subcellular locations were predicted. Possible functional relations among the identified proteins were determined using pathway analysis. The total number of unique F. columnare proteins identified using both 2-D LC and 2-DE approaches was 621, of which 10.95% (68) were identified by both methods, while 77.29% (480) and 11.76% (73) were unique in 2-D LC and 2-DE, respectively. COG groupings and subcellular localizations were similar between our data set and proteins predicted from the whole genome. Twenty eight pathways were significantly represented in our dataset (P < 0.05). CONCLUSION Results from this study provide experimental evidence for many proteins that were predicted from the F. columnare genome annotation, and they should accelerate functional and comparative studies aimed at understanding virulence mechanisms of this important pathogen.
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Affiliation(s)
- Pradeep R Dumpala
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762-6100, USA
| | - Nagihan Gülsoy
- Department of Biology, Faculty of Art and Science, Marmara University, Göztepe, İstanbul 34722, Turkey
| | - Mark L Lawrence
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762-6100, USA
| | - Attila Karsi
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS 39762-6100, USA
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Beganović J, Guillot A, van de Guchte M, Jouan A, Gitton C, Loux V, Roy K, Huet S, Monod H, Monnet V. Characterization of the Insoluble Proteome of Lactococcus lactis by SDS-PAGE LC-MS/MS Leads to the Identification of New Markers of Adaptation of the Bacteria to the Mouse Digestive Tract. J Proteome Res 2010; 9:677-88. [DOI: 10.1021/pr9000866] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jasna Beganović
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Alain Guillot
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Maarten van de Guchte
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Anne Jouan
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Christophe Gitton
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Valentin Loux
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Karine Roy
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Sylvie Huet
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Hervé Monod
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
| | - Véronique Monnet
- INRA, PAPPSO (Plate-Forme d’Analyse Protéomique de Paris Sud-Ouest), UR895 Génétique Microbienne, UR341 Mathématique et Informatique Appliquées, UR477 Biochimie Bactérienne, UR1077 Mathématique, Informatique, Génome, Domaine de Vilvert, F-78352 Jouy en Josas, France
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Bogaerts A, Baggerman G, Vierstraete E, Schoofs L, Verleyen P. The hemolymph proteome of the honeybee: Gel-based or gel-free? Proteomics 2009; 9:3201-8. [DOI: 10.1002/pmic.200800604] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Arioli S, Roncada P, Salzano AM, Deriu F, Corona S, Guglielmetti S, Bonizzi L, Scaloni A, Mora D. The relevance of carbon dioxide metabolism in Streptococcus thermophilus. MICROBIOLOGY-SGM 2009; 155:1953-1965. [PMID: 19372152 DOI: 10.1099/mic.0.024737-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Streptococcus thermophilus is a major component of dairy starter cultures used for the manufacture of yoghurt and cheese. In this study, the CO(2) metabolism of S. thermophilus DSM 20617(T), grown in either a N(2) atmosphere or an enriched CO(2) atmosphere, was analysed using both genetic and proteomic approaches. Growth experiments performed in a chemically defined medium revealed that CO(2) depletion resulted in bacterial arginine, aspartate and uracil auxotrophy. Moreover, CO(2) depletion governed a significant change in cell morphology, and a high reduction in biomass production. A comparative proteomic analysis revealed that cells of S. thermophilus showed a different degree of energy status depending on the CO(2) availability. In agreement with proteomic data, cells grown under N(2) showed a significantly higher milk acidification rate compared with those grown in an enriched CO(2) atmosphere. Experiments carried out on S. thermophilus wild-type and its derivative mutant, which was inactivated in the phosphoenolpyruvate carboxylase and carbamoyl-phosphate synthase activities responsible for fixing CO(2) to organic molecules, suggested that the anaplerotic reactions governed by these enzymes have a central role in bacterial metabolism. Our results reveal the capnophilic nature of this micro-organism, underlining the essential role of CO(2) in S. thermophilus physiology, and suggesting potential applications in dairy fermentation processes.
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Affiliation(s)
| | - Paola Roncada
- Istituto Sperimentale Italiano Lazzaro Spallanzani, sezione di Proteomica, Facoltà di Medicina Veterinaria, Milan, Italy
| | - Anna Maria Salzano
- Proteomics and Mass Spectrometry Laboratory, ISPAAM, National Research Council, Naples, Italy
| | - Francesca Deriu
- Department of Veterinary Pathology, Hygiene and Public Health, University of Milan, Milan, Italy
| | | | | | - Luigi Bonizzi
- Department of Veterinary Pathology, Hygiene and Public Health, University of Milan, Milan, Italy
| | - Andrea Scaloni
- Proteomics and Mass Spectrometry Laboratory, ISPAAM, National Research Council, Naples, Italy
| | - Diego Mora
- Department of Food Science and Microbiology, Milan, Italy
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Zotta T, Asterinou K, Rossano R, Ricciardi A, Varcamonti M, Parente E. Effect of inactivation of stress response regulators on the growth and survival of Streptococcus thermophilus Sfi39. Int J Food Microbiol 2009; 129:211-20. [DOI: 10.1016/j.ijfoodmicro.2008.11.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Revised: 11/18/2008] [Accepted: 11/19/2008] [Indexed: 01/17/2023]
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Abstract
About one quarter to one third of all bacterial genes encode proteins of the inner or outer bacterial membrane. These proteins perform essential physiological functions, such as the import or export of metabolites, the homeostasis of metal ions, the extrusion of toxic substances or antibiotics, and the generation or conversion of energy. The last years have witnessed completion of a plethora of whole-genome sequences of bacteria important for biotechnology or medicine, which is the foundation for proteome and other functional genome analyses. In this review, we discuss the challenges in membrane proteome analysis, starting from sample preparation and leading to MS-data analysis and quantification. The current state of available proteomics technologies as well as their advantages and disadvantages will be described with a focus on shotgun proteomics. Then, we will briefly introduce the most abundant proteins and protein families present in bacterial membranes before bacterial membrane proteomics studies of the last years will be presented. It will be shown how these works enlarged our knowledge about the physiological adaptations that take place in bacteria during fine chemical production, bioremediation, protein overexpression, and during infections. Furthermore, several examples from literature demonstrate the suitability of membrane proteomics for the identification of antigens and different pathogenic strains, as well as the elucidation of membrane protein structure and function.
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Affiliation(s)
- Ansgar Poetsch
- Lehrstuhl für Biochemie der Pflanzen, Ruhr Universität Bochum, Bochum, Germany.
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15
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Herve-Jimenez L, Guillouard I, Guedon E, Gautier C, Boudebbouze S, Hols P, Monnet V, Rul F, Maguin E. Physiology ofStreptococcus thermophilusduring the late stage of milk fermentation with special regard to sulfur amino-acid metabolism. Proteomics 2008; 8:4273-86. [DOI: 10.1002/pmic.200700489] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Hilvo M, Baranauskiene L, Salzano AM, Scaloni A, Matulis D, Innocenti A, Scozzafava A, Monti SM, Di Fiore A, De Simone G, Lindfors M, Jänis J, Valjakka J, Pastoreková S, Pastorek J, Kulomaa MS, Nordlund HR, Supuran CT, Parkkila S. Biochemical characterization of CA IX, one of the most active carbonic anhydrase isozymes. J Biol Chem 2008; 283:27799-27809. [PMID: 18703501 DOI: 10.1074/jbc.m800938200] [Citation(s) in RCA: 226] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Carbonic anhydrase IX (CA IX) is an exceptional member of the CA protein family; in addition to its classical role in pH regulation, it has also been proposed to participate in cell proliferation, cell adhesion, and tumorigenic processes. To characterize the biochemical properties of this membrane protein, two soluble recombinant forms were produced using the baculovirus-insect cell expression system. The recombinant proteins consisted of either the CA IX catalytic domain only (CA form) or the extracellular domain, which included both the proteoglycan and catalytic domains (PG + CA form). The produced proteins lacked the small transmembrane and intracytoplasmic regions of CA IX. Stopped-flow spectrophotometry experiments on both proteins demonstrated that in the excess of certain metal ions the PG + CA form exhibited the highest catalytic activity ever measured for any CA isozyme. Investigations on the oligomerization and stability of the enzymes revealed that both recombinant proteins form dimers that are stabilized by intermolecular disulfide bond(s). Mass spectrometry experiments showed that CA IX contains an intramolecular disulfide bridge (Cys(119)-Cys(299)) and a unique N-linked glycosylation site (Asn(309)) that bears high mannose-type glycan structures. Parallel experiments on a recombinant protein obtained by a mammalian cell expression system demonstrated the occurrence of an additional O-linked glycosylation site (Thr(78)) and characterized the nature of the oligosaccharide structures. This study provides novel information on the biochemical properties of CA IX and may help characterize the various cellular and pathophysiological processes in which this unique enzyme is involved.
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Affiliation(s)
- Mika Hilvo
- Institute of Medical Technology, FI-33014 Tampere, Finland.
| | - Lina Baranauskiene
- Laboratory of Biothermodynamics and Drug Design, Institute of Biotechnology, LT-02241 Vilnius, Lithuania
| | - Anna Maria Salzano
- Proteomics and Mass Spectrometry Laboratory, ISPAAM, National Research Council, 80147 Naples, Italy
| | - Andrea Scaloni
- Proteomics and Mass Spectrometry Laboratory, ISPAAM, National Research Council, 80147 Naples, Italy
| | - Daumantas Matulis
- Laboratory of Biothermodynamics and Drug Design, Institute of Biotechnology, LT-02241 Vilnius, Lithuania
| | - Alessio Innocenti
- Bioinorganic Chemistry Laboratory, University of Florence, 50019 Sesto Fiorentino (Florence), Italy
| | - Andrea Scozzafava
- Bioinorganic Chemistry Laboratory, University of Florence, 50019 Sesto Fiorentino (Florence), Italy
| | - Simona Maria Monti
- Institute of Biostructures and Bioimages, National Research Council, 80134 Naples, Italy
| | - Anna Di Fiore
- Institute of Biostructures and Bioimages, National Research Council, 80134 Naples, Italy
| | - Giuseppina De Simone
- Institute of Biostructures and Bioimages, National Research Council, 80134 Naples, Italy
| | | | - Janne Jänis
- Department of Chemistry, University of Joensuu, FI-80101 Joensuu, Finland
| | | | - Silvia Pastoreková
- Centre of Molecular Medicine, Institute of Virology, Slovak Academy of Sciences, 84505 Bratislava, Slovak Republic
| | - Jaromir Pastorek
- Centre of Molecular Medicine, Institute of Virology, Slovak Academy of Sciences, 84505 Bratislava, Slovak Republic
| | | | | | - Claudiu T Supuran
- Bioinorganic Chemistry Laboratory, University of Florence, 50019 Sesto Fiorentino (Florence), Italy
| | - Seppo Parkkila
- Institute of Medical Technology, FI-33014 Tampere, Finland; School of Medicine, University of Tampere and Tampere University Hospital, FI-33014 Tampere, Finland
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Salzano AM, D'Ambrosio C, Scaloni A. Mass Spectrometric Characterization of Proteins Modified by Nitric Oxide‐Derived Species. Methods Enzymol 2008; 440:3-15. [DOI: 10.1016/s0076-6879(07)00801-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Braun RJ, Kinkl N, Beer M, Ueffing M. Two-dimensional electrophoresis of membrane proteins. Anal Bioanal Chem 2007; 389:1033-45. [PMID: 17680235 DOI: 10.1007/s00216-007-1514-6] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2007] [Revised: 07/10/2007] [Accepted: 07/13/2007] [Indexed: 01/26/2023]
Abstract
One third of all genes of various organisms encode membrane proteins, emphasizing their crucial cellular role. However, due to their high hydrophobicity, membrane proteins demonstrate low solubility and a high tendency for aggregation. Indeed, conventional two-dimensional gel electrophoresis (2-DE), a powerful electrophoretic method for the separation of complex protein samples that applies isoelectric focusing (IEF) in the first dimension and sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) in the second dimension, has a strong bias against membrane proteins. This review describes two-dimensional electrophoretic techniques that can be used to separate membrane proteins. Alternative methods for performing conventional 2-DE are highlighted; these involve replacing the IEF with electrophoresis using cationic detergents, namely 16-benzyldimethyl-n-hexadecylammonium chloride (16-BAC) and cetyl trimethyl ammonium bromide (CTAB), or the anionic detergent SDS. Finally, the separation of native membrane protein complexes through the application of blue and clear native gel electrophoresis (BN/CN-PAGE) is reviewed, as well as the free-flow electrophoresis (FFE) of membranes.
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Affiliation(s)
- Ralf J Braun
- GSF-National Research Center for Environment and Health, Institute of Human Genetics, Ingolstaedter Landstrasse 1, 85764, Munich-Neuherberg, Germany
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