Proteomics and Protein Microarrays
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1 Introduction to BioMEMS & Medical Microdevices Proteomics and Protein Microarrays Companion lecture to the textbook: Fundamentals of BioMEMS and Medical Microdevices, by Prof.,
2 Proteomics The study of all proteins, including their relative abundance, distribution, posttranslational modifications, functions, and interactions with other macromolecules, in a given cell or organism within a given environment and at a specific stage in the cell cycle. Pardanani, A. et al., Mayo Clinic Proceedings 77(11), 2002
3 Areas of Interest 1) Abundance proteomics: Relative abundance of specific proteins in a given tissue under different conditions of health and disease. 2) Cell-mapping: Intracellular signaling pathways and regulatory networks 3) Structural proteomics: Study of active sites and functional domains.
4 Eukaryotic Gene Regulation Evolution-textbook.org; Modified from Seet, BT et al. Nat. Rev. Mol. Cell. Biol. 7: , 2006
5 Proteome The entire collection of proteins, estimated to be more than 100,000. More proteins comprise a proteome than genes a genome. Alternative gene splicing of mrna, Posttranslational modification (PTM). There is neither a one to one correlation of gene to protein, nor mrna levels to proteins levels. PTM and signal transduction play a major role in cell transformation, such as tumor cells.
6 Post-translational Modification Post-translational modification (PTM): Phosphorylation, glycosylation, acetylation, ubiquitination, methylation etc. PTM of proteins, not detected through RNA analysis, may occur at different stages of tumor development indicative of early or late events of transformation. High throughput techniques may useful for screening and surveillance.
7 Amino Acids to Proteins Vander, AJ, et al., Human Physiology: The Mechanism of Body Function, 8 th Ed., 2001
8 Tertiary Structure Vander, AJ, et al., Human Physiology: The Mechanism of Body Function, 8 th Ed., 2001
9 Identification of Proteins Western Blot ELISA Bead-based Method Abel, L. et al. Autoimmune profiling with protein microarrays in clinic applications. Biochimica et Biophysica Acta 1844 (2014)
10 Using Mass Spectrometry Graves, PR and TAJ Haystead, Handbook of Proteomic Methods (2003)
11 Mass Spectrometers Left: University of Maryland Right: NASA Martian Rover
12 Principle Carey, FA, Advanced Organic Chemistry 5 th Ed., 2002
13 Protein Microarrays Useful for study of studying protein expression, interaction, function and post-translational modifications. High-throughput, high sensitivity, low sample volumes, and efficient sample-to-result time. Forward-phase microarrays: Proteins and peptides are immobilized for capturing antibodies. Antibodies, sugars or aptamers are immobilized and labeled proteins are captured. Sandwich mode a labeled secondary antibody is used for detection. Reverse phase microarrays: Complex samples such as serum, plasma, or even tissues are immobilized in an array format and probed with antibodies to determine the differential amount of protein molecules in the screened samples.
14 Additional Classification Differential profiling and screening protein arrays. Functional protein arrays. Arrays from biological samples. Cell-based protein arrays. Cell-free protein arrays. Antibody arrays.
15 Microarray Analysis Concept Abel, L. et al. Autoimmune profiling with protein microarrays in clinic applications. Biochimica et Biophysica Acta 1844 (2014)
16 Array Formats Cretich, M. et al. Protein microarray technology: how far off is routine diagnostics? Analyst, 2014, 139, 528.
17 Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
18 Experimental Workflow Casado-Vela, J. Screening of protein-protein and protein-dna interactions using microarrays: applications in biomedicine. Advances in Protein Chemistry and Structural Biology, Volume 95, 2014
19 Protein, Peptide and Small Molecule Array Sun, Hongyan, et al. Recent advances in microarray technologies for proteomics. Chemistry & Biology 20, May 23, 2013
20 Capture Molecules Abel, L. et al. Autoimmune profiling with protein microarrays in clinic applications. Biochimica et Biophysica Acta 1844 (2014)
21 Fabrication Technologies Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
22 Pin Printing Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
23 Microstamping Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
24 Photolithographic Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
25 E-Beam Lithography Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
26 Dip Pen Nanolithography Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
27 Single Droplet Noncontact Printing Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
28 A Microfluidic-Interfaced Printer Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
29 Nucleic Acid Programmable Protein Array Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
30 In-Situ Puromycin Capture Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
31 Protein In-Situ Array Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
32 Technology Comparison Romanov, V. et al. A critical comparison of protein microarray fabrication technologies. Analyst, 2014, 139, ,
33 Microarray Immobilization Sun, Hongyan, et al. Recent advances in microarray technologies for proteomics. Chemistry & Biology 20, May 23, 2013
34 Selected Immobilization Strategies Selected Examples of Immobilization Strategy in Microarray Fabrication Sun, Hongyan, et al. Recent advances in microarray technologies for proteomics. Chemistry & Biology 20, May 23, 2013
35 Immobilization Strategy Continued Sun, Hongyan, et al. Recent advances in microarray technologies for proteomics. Chemistry & Biology 20, May 23, 2013
36 Protein Microarray Uses Protein expression profiling. Studying posttranslational modifications, Protein-protein binding, Drug interaction, Protein folding, Substrate specificity, Enzymatic activity and Interaction between proteins and nucleic acids.
37 Recent Application Examples Sun, Hongyan, et al. Recent advances in microarray technologies for proteomics. Chemistry & Biology 20, May 23, 2013
38 Applications Continued Sun, Hongyan, et al. Recent advances in microarray technologies for proteomics. Chemistry & Biology 20, May 23, 2013
39 Antigen Array To Study Autoimmune disease Yestes, A. and F. Quitana. Antigen microarray for the study of autoimmune diseases. Clinical Chemistry 59:7, (2013)
40 Factors Affecting Performance Appropriate surface for the immobilization of either protein or antibody samples. Microarray patterning technique. Protein conformational changes with expression, purification or immobilization may alter their function or render them inactive. Charged surfaces, temperature, ph and solvents may denature some proteins, and therefore surfaces must be biocompatible to minimize denaturation. Protein instability may lessen shelf-life.
41 Summary Proteomics - The study of all proteins, including their relative abundance, distribution, post-translational modifications, functions, and interactions with other macromolecules, in a given cell or organism within a given environment and at a specific stage in the cell cycle. Proteome - The entire collection of proteins, estimated to be more than 100,000, Gene Expression and Regulation. Identification of Proteins Western Blot, ELISA, and Bead Methods. Mass Spectrometry
42 Protein Microarrays Array Formats Capture Molecules Fabrication Technologies Immobilization Methods Applications Factors Affecting Performance
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