Proteomic survey of metabolic pathways in rice

Antonius Koller, Michael P. Washburn, B. Markus Lange, Nancy L. Andon, Cosmin Deciu, Paul A. Haynes, Lara Hays, David Schieltz, Ryan Ulaszek, Jing Wei, Dirk Wolters, John R. Yates*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

338 Citations (Scopus)


A systematic proteomic analysis of rice (Oryza sativa) leaf, root, and seed tissue using two independent technologies, two-dimensional gel electrophoresis followed by tandem mass spectrometry and multidimensional protein identification technology, allowed the detection and identification of 2,528 unique proteins, which represents the most comprehensive proteome exploration to date. A comparative display of the expression patterns indicated that enzymes involved in central metabolic pathways are present in all tissues, whereas metabolic specialization is reflected in the occurrence of a tissue-specific enzyme complement. For example, tissue-specific and subcellular compartment-specific isoforms of ADP-glucose pyrophosphorylase were detected, thus providing proteomic confirmation of the presence of distinct regulatory mechanisms involved in the biosynthesis and breakdown of separate starch pools in different tissues. In addition, several previously characterized allergenic proteins were identified in the seed sample, indicating the potential of proteomic approaches to survey food samples with regard to the occurrence of allergens.

Original languageEnglish
Pages (from-to)11969-11974
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number18
Publication statusPublished - 3 Sep 2002
Externally publishedYes


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