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Home > Mathematics and Science books > Chemistry > Development of Fully Automatable Multidimensional Liquid Chromatography (MDLC) with Online Tandem Mass Spectrometry for Shotgun Proteomics
Development of Fully Automatable Multidimensional Liquid Chromatography (MDLC) with Online Tandem Mass Spectrometry for Shotgun Proteomics

Development of Fully Automatable Multidimensional Liquid Chromatography (MDLC) with Online Tandem Mass Spectrometry for Shotgun Proteomics


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About the Book

This dissertation, "Development of Fully Automatable Multidimensional Liquid Chromatography (MDLC) With Online Tandem Mass Spectrometry for Shotgun Proteomics" by Pak-wing, Kong, 江柏榮, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract:  Proteomics is the systematic study of the proteome: the total protein expression of a cell or tissue under specified conditions. The multiplicity and complexity of proteins in cells requires sensitive, selective, and comprehensive methodologies for their distinction and characterization. Multidimensional liquid chromatography (MDLC) coupled with biological tandem mass spectrometry (MS/MS) is uniquely suited to fulfill those requirements and has become an indispensable tool in MS-based proteomics. Our laboratory has developed an online high-/low-pH reversed-phase/reversed-phase (RP-RP) LC system exhibiting fully automatable and reproducible performance. It is a promising alternative to the strong cation exchange/reversed-phase (SCX-RP) system commonly used in high-throughput comprehensive proteomics analyses. The first part of this Thesis (Chapter 2) describes the development of a variant of the high-/low-pH RP-RP platform-RP-SCX-RP-that integrates an additional SCX trap column between the two RP columns to enhance sample recovery. This new system allows the detection of larger numbers of hydrophilic peptides. Indeed, in the analyses of a lysate of Arabidopsis chloroplast proteins, it identified approximately 25% more non-redundant proteins than those identified using the previous version of the RP-RP system. The modified platform has been extended for the online removal of sodium dodecyl sulfate and other excess interference chemicals used in Isobaric Tags for Relative and Absolute Quantification (iTRAQ) reactions, thereby avoiding the need for time-consuming offline SCX clean-up prior to RP-RP separation in the quantitative proteomics analyses of crude biological samples at low-microgram levels. A novel online three-dimensional liquid chromatography (3DLC) system was derived from the RP-SCX-RP design, exhibiting remarkably enhanced orthogonality, resolution, and peak capacity. Peptides were separated in the first-dimension high-pH RP column based on their hydrophobicity, followed by sub-fractionation in the second-dimension SCX column, primarily based on charge; the third dimension was a typical low-pH RP separation, prior to MS analysis. The overall performance of the system was evaluated through analysis of a cell lysate of mouse embryonic fibroblasts. Relative to the two-dimensional high-/low-pH RP-RP system, the new 3D system yielded significant increases in the number of unique peptides and proteins identified, making it a good alternative to SCX-RP and high-/low-pH RP-RP as an efficient automated MDLC platform for high-throughput shotgun proteomics. An optimized and miniaturized variant of the three-dimensional LC platform was also developed. Its simplified setup and operation, by decreasing the number of six-port switching valves (from three to two) and the number of SCX fractionation steps, minimized both the potential sample loss and the total analysis time (by ca. 30%). Thus, a variety of novel, automatable, and robust RP-SCX-RP-based MDLC platforms have been developed for high-throughput qualitative and quantitative analysis. The performance of these systems complements conventional MDLC systems, with enhanced quality, quantity, reproducibility, and throughput of protein identification and quantification. DOI: 10.5353/th_b4819927 Subjects: Liquid chromatography Mass spectrometry


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Product Details
  • ISBN-13: 9781361278925
  • Publisher: Open Dissertation Press
  • Publisher Imprint: Open Dissertation Press
  • Height: 279 mm
  • No of Pages: 162
  • Weight: 390 gr
  • ISBN-10: 1361278927
  • Publisher Date: 26 Jan 2017
  • Binding: Paperback
  • Language: English
  • Spine Width: 9 mm
  • Width: 216 mm


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Development of Fully Automatable Multidimensional Liquid Chromatography (MDLC) with Online Tandem Mass Spectrometry for Shotgun Proteomics
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