Construction of a chloroplast protein interaction network and functional mining of photosynthetic proteins in Arabidopsis thaliana.

Yu QB, Li G, Wang G, Sun JC, Wang PC, Wang C, Mi HL, Ma WM, Cui J, Cui YL, Chong K, Li YX, Li YH, Zhao Z, Shi TL, Yang ZN
Cell Res. 2008 18 (10): 1007-19

PMID: 18813226 · DOI:10.1038/cr.2008.286

Chloroplast is a typical plant cell organelle where photosynthesis takes place. In this study, a total of 1,808 chloroplast core proteins in Arabidopsis thaliana were reliably identified by combining the results of previously published studies and our own predictions. We then constructed a chloroplast protein interaction network primarily based on these core protein interactions. The network had 22,925 protein interaction pairs which involved 2,214 proteins. A total of 160 previously uncharacterized proteins were annotated in this network. The subunits of the photosynthetic complexes were modularized, and the functional relationships among photosystem I (PSI), photosystem II (PSII), light harvesting complex of photosystem I (LHC I) and light harvesting complex of photosystem I (LHC II) could be deduced from the predicted protein interactions in this network. We further confirmed an interaction between an unknown protein AT1G52220 and a photosynthetic subunit PSI-D2 by yeast two-hybrid analysis. Our chloroplast protein interaction network should be useful for functional mining of photosynthetic proteins and investigation of chloroplast-related functions at the systems biology level in Arabidopsis.

MeSH Terms (9)

Arabidopsis Arabidopsis Proteins Chloroplasts Green Fluorescent Proteins Photosynthesis Photosynthetic Reaction Center Complex Proteins Photosystem II Protein Complex Photosystem I Protein Complex Two-Hybrid System Techniques

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