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• W2023552725 endingPage "1192" @default.
• W2023552725 startingPage "1172" @default.
• W2023552725 abstract "Abstract Plastoglobules (PGs) in chloroplasts are thylakoid-associated monolayer lipoprotein particles containing prenyl and neutral lipids and several dozen proteins mostly with unknown functions. An integrated view of the role of the PG is lacking. Here, we better define the PG proteome and provide a conceptual framework for further studies. The PG proteome from Arabidopsis (Arabidopsis thaliana) leaf chloroplasts was determined by mass spectrometry of isolated PGs and quantitative comparison with the proteomes of unfractionated leaves, thylakoids, and stroma. Scanning electron microscopy showed the purity and size distribution of the isolated PGs. Compared with previous PG proteome analyses, we excluded several proteins and identified six new PG proteins, including an M48 metallopeptidase and two Absence of bc1 complex (ABC1) atypical kinases, confirmed by immunoblotting. This refined PG proteome consisted of 30 proteins, including six ABC1 kinases and seven fibrillins together comprising more than 70% of the PG protein mass. Other fibrillins were located predominantly in the stroma or thylakoid and not in PGs; we discovered that this partitioning can be predicted by their isoelectric point and hydrophobicity. A genome-wide coexpression network for the PG genes was then constructed from mRNA expression data. This revealed a modular network with four distinct modules that each contained at least one ABC1K and/or fibrillin gene. Each module showed clear enrichment in specific functions, including chlorophyll degradation/senescence, isoprenoid biosynthesis, plastid proteolysis, and redox regulators and phosphoregulators of electron flow. We propose a new testable model for the PGs, in which sets of genes are associated with specific PG functions." @default.
• W2023552725 created "2016-06-24" @default.
• W2023552725 creator A5007969049 @default.
• W2023552725 creator A5045823772 @default.
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• W2023552725 creator A5049348072 @default.
• W2023552725 creator A5072741116 @default.
• W2023552725 creator A5076961138 @default.
• W2023552725 date "2012-01-24" @default.
• W2023552725 modified "2023-10-13" @default.
• W2023552725 title "The Functional Network of the Arabidopsis Plastoglobule Proteome Based on Quantitative Proteomics and Genome-Wide Coexpression Analysis " @default.
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• W2023552725 doi "https://doi.org/10.1104/pp.111.193144" @default.
• W2023552725 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3291262" @default.
• W2023552725 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22274653" @default.
• W2023552725 hasPublicationYear "2012" @default.
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