Abstract:
:Despite the high sensitivity and relatively high tolerance for contaminants of matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) there is often a need to purify and concentrate the sample solution, especially after in-gel digestion of proteins separated by two-dimensional gel electrophoresis (2-DE). A silicon microextraction chip (SMEC) for sample clean-up and trace enrichment of peptides was manufactured and investigated. The microchip structure was used to trap reversed-phase chromatography media (POROS R2 beads) that facilitates sample purification/enrichment of contaminated and dilute samples prior to the MALDI-TOF MS analysis. The validity of the SMEC sample preparation technique was successfully investigated by performing analysis on a 10 nM peptide mixture containing 2 m urea in 0.1 m phosphate-buffered saline with MALDI-TOF MS. It is demonstrated that the microchip sample clean-up and enrichment of peptides can facilitate identification of proteins from 2-DE separations. The microchip structure was also used to trap beads immobilized with trypsin, thereby effectively becoming a microreactor for enzymatic digestion of proteins. This microreactor was used to generate a peptide map from a 100 nM bovine serum albumin sample.
journal_name
Proteomicsjournal_title
Proteomicsauthors
Ekström S,Malmström J,Wallman L,Löfgren M,Nilsson J,Laurell T,Marko-Varga Gdoi
10.1002/1615-9861(200204)2:4<413::AID-PROT413>3.0.subject
Has Abstractpub_date
2002-04-01 00:00:00pages
413-21issue
4eissn
1615-9853issn
1615-9861journal_volume
2pub_type
杂志文章相关文献
PROTEOMICS文献大全abstract::The proteomic profile of hypothalamus, a key organ of CNS, is explored here by employing two widely used MS techniques, i.e. HPLC/ESI-ion trap and HPLC/ESI-quadrupole-TOF MS. Strong cation exchange is used for the fractionation of peptides and protein search engine MASCOT is employed for data query. One hundred and th...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201300073
更新日期:2013-08-01 00:00:00
abstract::In spite of the high sensitivity of silver staining and the wide dynamic range of various fluorescent detection methods, Coomassie Brilliant Blue staining is still the most widely used protein detection technique for proteins separated by polyacrylamide gel electrophoresis. There are several reasons: Low price, Visibl...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200690121
更新日期:2006-09-01 00:00:00
abstract::Liquid Chromatography coupled to tandem mass spectrometry (nanoLC-MS/MS) is a powerful analytical technique for the identification and mass analysis of complex protein mixtures. Here, we present a combination of methods developed for the extensive/deep proteomic analysis of purified ribosome/mRNA particles assembled i...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201400628
更新日期:2015-07-01 00:00:00
abstract::In an effort to identify tumor-associated proteins from plasma of tumor-bearing mice that may be used as diagnostic biomarkers, we developed a strategy that combines a tumor xenotransplantation model in nude mice with comparative proteomic technology. Five human cancer cell lines (SC-M1, HONE-1, CC-M1, OECM1, GBM 8401...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200400785
更新日期:2004-09-01 00:00:00
abstract::Transcription factors (TFs) are a family of DNA-binding proteins whose gene regulatory capabilities are of vital importance in defining the molecular state of a cell. Despite their biological significance, our understanding of TF behavior and function is still limited. This is because we have so far mostly relied on g...
journal_title:Proteomics
pub_type: 杂志文章,评审
doi:10.1002/pmic.201600317
更新日期:2017-02-01 00:00:00
abstract::Sandwich ELISA microarrays have great potential for validating disease biomarkers. Each ELISA relies on robust-affinity reagents that retain activity when immobilized on a solid surface or when labeled for detection. Single-chain antibodies (scFv) are affinity reagents that have greater potential for high-throughput p...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200701036
更新日期:2008-06-01 00:00:00
abstract::Following transmission to the vertebrate host, the protozoan parasite Leishmania donovani differentiates into the pathogenic amastigote stage that is adapted for intracellular survival. This developmental transition is induced by environmental factors including elevated temperature and acidic pH and is likely transduc...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200700697
更新日期:2008-01-01 00:00:00
abstract::In this study, various proteomics-based methods were utilized to examine the 14-3-3 protein family in Arabidopsis thaliana. A protein extract was prepared from an Arabidopsis hypocotyl suspension culture and analyzed by two-dimensional gel electrophoresis and immunoblotting with a 14-3-3 monoclonal antibody that recog...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200500729
更新日期:2006-05-01 00:00:00
abstract::Microglia, as the resident brain immune cells, can exhibit a broad range of activation phenotypes, which have been implicated in a multitude of central nervous system disorders. Current widely studied microglial cell lines are mainly derived from neonatal rodent brain that can limit their relevance to homeostatic func...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201800469
更新日期:2019-06-01 00:00:00
abstract::Helicobacter pylori is one of the most common bacterial pathogens and causes a variety of diseases, such as peptic ulcer or gastric cancer. Despite intensive study of this human pathogen in the last decades, knowledge about its membrane proteins and, in particular, those which are putative components of the type IV se...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200401019
更新日期:2005-04-01 00:00:00
abstract::A novel strain of influenza A H1N1 emerged in the spring of 2009 and has spread rapidly throughout the world. Although vaccines have recently been developed that are expected to be protective, their availability was delayed until well into the influenza season. Although anti-influenza drugs such as neuraminidase inhib...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200900775
更新日期:2010-06-01 00:00:00
abstract::Microparticles (MPs) are small membranous particles (100-1000 nm) released under normal steady-state conditions and are thought to provide a communication network between host cells. Previous studies demonstrated that Mycobacterium tuberculosis (M. tb) infection of macrophages increased the release of MPs, and these M...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201400610
更新日期:2015-09-01 00:00:00
abstract::O-GlcNAcylation is a dynamic PTM of nuclear and cytoplasmic proteins, regulated by O-GlcNAc transferase (OGT) and O-GlcNAcase, which catalyze the addition and removal of O-GlcNAc, respectively. This modification is associated with glucose metabolism, which plays important roles in many diseases including cancer. Altho...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201200126
更新日期:2013-07-01 00:00:00
abstract::Transmissible spongiform encephalopathies (TSEs) are neurodegenerative disorders characterized by the accumulation in the CNS of a pathological conformer (PrP(TSE)) of the host-encoded cellular prion protein (PrP(C)). PrP(TSE) has a central role in the pathogenesis of the disease but other factors are likely involved ...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200900085
更新日期:2009-08-01 00:00:00
abstract::In this study, we performed the first high-throughput and comprehensive proteomic profiling of the rat hippocampal proteome. Using a combination of 2-D LC-MS and data analysis with the Rosetta Elucidator(®) system, we identified 1340 unique proteins. Functional classification showed that most of these were associated ...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201000525
更新日期:2011-02-01 00:00:00
abstract::Advances in gel-based nonradioactive protein expression and PTM detection using fluorophores has served as the impetus for developing analytical instrumentation with improved imaging capabilities. We describe a CCD camera-based imaging instrument, equipped with both a high-pressure Xenon arc lamp and a UV transillumin...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200500062
更新日期:2005-11-01 00:00:00
abstract::Glycan-binding proteins (GBPs) play an important role in cell adhesion, bacterial/viral infection, and cellular signaling pathways. However, little is known about the precision alteration of GBPs referred to pathological changes in hepatic stellate cells (HSCs) during liver fibrosis. Here, the carbohydrate microarrays...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201500030
更新日期:2015-10-01 00:00:00
abstract::This is the first broad proteomic description of Gluconacetobacter diazotrophicus, an endophytic bacterium, responsible for the major fraction of the atmospheric nitrogen fixed in sugarcane in tropical regions. Proteomic coverage of G. diazotrophicus PAL5 was obtained by two independent approaches: 2-DE followed by MA...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200700912
更新日期:2008-04-01 00:00:00
abstract::Glycosylation is a widespread PTM of proteins; the carbohydrate moieties provide various functional, immunological and structural aspects of both eukaryotic and prokaryotic glycoproteins. Traditional strategies used to analyse glycoprotein O-glycans involve glycoprotein isolation, followed by glycan release using solu...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200500331
更新日期:2006-05-01 00:00:00
abstract::The ascomycete Botrytis cinerea is a phytopathogenic fungus infecting and causing significant yield losses in a number of crops. Moreover, in the last few years, B. cinerea has been adopted as an important model system in molecular phytopathology. In spite of these contributions, the molecular basis of the infection c...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200800540
更新日期:2009-05-01 00:00:00
abstract::We describe the first phosphoproteome of the model filamentous fungus Aspergillus nidulans. Phosphopeptides were enriched using titanium dioxide, separated using a convenient ultra-long reverse phase gradient, and identified using a "high-high" strategy (high mass accuracy on the parent and fragment ions) with higher-...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201400063
更新日期:2014-11-01 00:00:00
abstract::Porcine epidemic diarrhea virus (PEDV) causes an acute, highly contagious, and devastating viral enteric disease with a high mortality rate in suckling pigs. A large-scale outbreak of PED occurred in China in 2010, with PEDV emerging in the United States in 2013 and spreading rapidly, posing significant economic and p...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201400458
更新日期:2015-06-01 00:00:00
abstract::The severe pulmonary form of leptospirosis (SPFL) is an especially serious and rapid disease process characterized by alveolar hemorrhage and acute respiratory failure. The outer membrane of Leptospira facilitates direct interactions with the environs and likely contains important constituents involved during infectio...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200400880
更新日期:2005-01-01 00:00:00
abstract::Caulobacter crescentus, a Gram negative alpha-purple bacterium that displays an invariant asymmetric cell division pattern, has become a key model system for the study of bacterial development. Membrane proteins play key roles in cell cycle events, both as components of landmark morphological structures and as critica...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/1615-9861(200104)1:5<705::AID-PROT705>3.0.
更新日期:2001-05-01 00:00:00
abstract::The Human Kidney and Urine Proteome Project (HKUPP) was initiated in 2005 to promote proteomics research in the nephrology field, to better understand kidney functions as well as pathogenic mechanisms of kidney diseases, and to define novel biomarkers and therapeutic targets. This project was first approved in 2005 by...
journal_title:Proteomics
pub_type:
doi:10.1002/pmic.200800138
更新日期:2008-06-01 00:00:00
abstract::An aim of proteome research is to identify the entire complement of proteins expressed in defined cell types of humans, animals, plants, and microorganisms. The approach requires searching for low abundant or even rarely expressed proteins in many cell types, as well as the determination of the protein expression leve...
journal_title:Proteomics
pub_type: 杂志文章,评审
doi:10.1002/pmic.201300253
更新日期:2014-03-01 00:00:00
abstract::This review provides a brief overview of the development of data-independent acquisition (DIA) mass spectrometry-based proteomics and selected DIA data analysis tools. Various DIA acquisition schemes for proteomics are summarized first including Shotgun-CID, DIA, MSE , PAcIFIC, AIF, SWATH, MSX, SONAR, WiSIM, BoxCar, S...
journal_title:Proteomics
pub_type: 杂志文章,评审
doi:10.1002/pmic.201900276
更新日期:2020-09-01 00:00:00
abstract::Protein arrays permit the parallel analysis of many different markers in a small sample volume. However, the problem of cross-reactivity limits the degree of multiplexing in parallel sandwich immunoassays (using monoclonal antibodies (mAbs)), meaning antibodies must be prescreened in order to reduce false positives. I...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.200300736
更新日期:2004-05-01 00:00:00
abstract::The function of a protein is modulated by its abundance and its degree of specific post-translational modifications such as phosphorylation, glycosylation or truncation. Consequently, changes of protein concentration and the extent of their post-translational modifications has a great influence on the activity of intr...
journal_title:Proteomics
pub_type: 杂志文章,评审
doi:10.1002/pmic.200300581
更新日期:2003-11-01 00:00:00
abstract::Plant tissues contain large amounts of secondary compounds that significantly interfere with protein extraction and 2DE analysis. Thus, sample preparation is a crucial step prior to 2DE in plant proteomics. This tutorial highlights the guidelines that need to be followed to perform an adequate total protein extraction...
journal_title:Proteomics
pub_type: 杂志文章
doi:10.1002/pmic.201300239
更新日期:2014-03-01 00:00:00