1 <& /page/page_title.mas, title => 'The Tomato Fruit Glycoproteome' &>
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6 <img src="/documents/img/secretom/SDS_PAGE_x400.png" />
9 SDS PAGE gel image showing tomato fruit proteins isolated by
10 lectin affinity, stained with Coomassie Blue (black) or
11 glycoprotein stain (pink).
18 As with all eukaryotes, N-glycosylation in plant cells is a common
19 post-translational modification for proteins traveling through the
20 secretory pathway, many of which are destined for the cell wall. The
21 large-scale isolation and analysis of glycoproteins by lectin
22 affinity chromatography, coupled with mass spectrometry (MS), has
23 become a powerful tool to evaluate the glycoproteome of mammalian
24 cells; however, is has rarely been used with plants glycoproteins.
29 We are using affinity selection of glycoproteins using the lectin
30 Concanavalin A, coupled with two-dimensional liquid chromatography
31 (2-D LC) and matrix-assisted laser desorption/ionization mass
32 spectrometry (2DLC-MALDI MS/MS) and electrospray ionization MS
33 (ESI-MS) analysis, to identify extracellular and secretory pathway
34 proteins, focusing on those expressed in ripe tomato fruit.
38 Tomato has long served as model system for fleshy fruit development
39 and ripening is an excellent system to study cell wall proteins as it
40 is associated with dramatic changes in wall biology, including
41 dramatic enzyme-mediated cell wall polysaccharide degradation,
42 apoplastic sugar metabolism and extracellular defenses against
43 microbial pathogens. In spite of this, there are few published
44 proteomic analyses of ripening tomato fruit and most of those are
45 based on extraction of total proteins followed by 2-DE separation,
46 since the wall proteome was not the major target. Consequently, the
47 protein extraction step was not optimized for secreted proteins.
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53 Develop lectin affinity chromatography protocols to optimize
54 extraction of plant glycoproteins.
56 Evaluate various MS strategies for effective identification of
57 glycoproteins, including MALDI and ESI associated strategies.
59 Generate a catalog of annotated tomato glycoproteins, focusing on
60 fruit development, including identification of glycosylation sites.
62 Confirm localization using transient expression as fluorescent
63 fusion proteins in onion epidermal cells.
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72 Computational prediction of the subcellular location of the
73 N-glycoproteins isolated from green mature tomato fruit with
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79 <img src="/documents/img/secretom/location_prediction_400.png" />
85 This enrichment strategy has been highly effective, with a high
86 proportion the identified proteins showing predicted localization
87 either in the secretory pathway. We are currently investigating the
88 targeting of proteins from the secretory pathway to other
89 intracellular organelles.
94 <&| /secretom/section_templates/data_items.mas, default_ref_base => '/download/data/secretom/Tomato_fruit_glycoproteome' &>
95 - text: "Tomato (cv. Ailsa Craig) ripe fruit: annotated glycoproteins, MALDI"
96 ref: Tomato_fruit_glycoproteins_MALDI.docx
97 - text: "Tomato (cv. Ailsa Craig) ripe fruit: glycoproteins MALDI, peptides"
98 ref: Tomato_fruit_glycoproteins_MALDI_peptides.xlsx
99 - text: "Tomato (cv. Ailsa Craig) mature green fruit: glycoproteins, ESI"
100 ref: Tomato_fruit_glycoproteins_ESI.xlsx
101 - text: "Glycoprotein fractions from mature green tomato fruit identified using Concanavalin A"
103 - text: "Glycoprotein fractions from mature green tomato fruit identified using Snowdrop lectin"
105 - text: "Glycoprotein fractions from mature green tomato fruit identified using Lentil lectin"
107 - text: "More files in FTP"
108 ref: ftp://ftp.solgenomics.net/secretom/Tomato_fruit_glycoproteome
111 <&| /secretom/section_templates/publications.mas &>
112 Ruiz-May, E., Thannhauser, T.W., Zhang, S. and Rose, J.K.C. (2012) Analytical technologies for identification and characterization of the plant N-glycoproteome. In press, Frontiers in Plant Physiology.
114 Zhang, S., Sherwood, R.W., Yang, Y., Tara Fish, T., Chen, W., McCardle, J. A., Jones, R.M., Yusibov, V., Ruiz-May, E., Rose, J.K.C. and Thannhauser, T.W. (2012) Comparative characterization of the glycosylation profiles of an influenza hemagglutinin produced in plant and insect hosts. Proteomics 12: 1269-88.
116 Ruiz-May, E., Kim, S.J., Brandizzi, F. and Rose, J.K.C. (2012) The secreted plant N-glycoproteome and associated secretory pathways. Frontiers in Plant Physiology 3: 117.
118 Catala, C., Howe, K.J., Hucko, S., Rose, J.K.C. and Thannhauser, T.W. (2011) Towards characterization of the glycoproteome of tomato (Solanum lycopersicum) fruit using Concanavalin A lectin affinity chromatography and LC-MALDI-MS/MS analysis. Proteomics 11: 1530-1544.