Proteomic survey of metabolic pathways in rice.
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.
Koller
Antonius
A
Protein and Metabolite Dynamics Department, Torrey Mesa Research Institute, 3115 Merryfield Row, San Diego, CA 92121, USA. antonius.koller@syngenta.com
Washburn
Michael P
MP
Lange
B Markus
BM
Andon
Nancy L
NL
Deciu
Cosmin
C
Haynes
Paul A
PA
Hays
Lara
L
Schieltz
David
D
Ulaszek
Ryan
R
Wei
Jing
J
Wolters
Dirk
D
Yates
John R
JR
D000595:Amino Acid Sequence; D002851:Chromatography, High Pressure Liquid; D015180:Electrophoresis, Gel, Two-Dimensional; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D012275:Oryza / Q000378:metabolism*; D010940:Plant Proteins / Q000737:chemistry / Q000378:metabolism; D020543:Proteome; D017386:Sequence Homology, Amino Acid
D010940:Plant Proteins; D020543:Proteome