ArticlePlant physiology2006
Protein profiling of plastoglobules in chloroplasts and chromoplasts. A surprising site for differential accumulation of metabolic enzymes.
Article in Plant physiology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 204 papers.
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Who cites it
204 citing papers in PubMed, 442 citations in OpenAlex.
- Metabolic cues are the main drivers for the differentiation of chloroplasts into chromoplasts and other plastid types.Journal of experimental botany · 2026Review
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- A plastoglobuli-localized enzyme links phenylalanine biosynthesis to translational homeostasis in maize.Nature communications · 2026Article
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- Regulation of chloroplast biogenesis and differentiation.Journal of experimental botany · 2026Review
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- Identification of 1,6-hexadecanediol and its wax diesters in chloroplasts of Nicotiana benthamiana.Planta · 2025Article
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- Arabidopsis phytyl ester synthases PES1 and PES2 moonlighted as xanthophyll acyltransferases in plants.Planta · 2025Article
- Multi-omics analyses unveil dual genetic loci governing four distinct watermelon flesh color phenotypes.Molecular horticulture · 2025Article
- Powdery mildew induces chloroplast storage lipid formation at the expense of host thylakoids to promote spore production.The Plant cell · 2025Article
- Multiscale physiological responses to nitrogen supplementation of maize hybrids.Plant physiology · 2024Article
- The conserved active site aspartate residue is required for the function of the chloroplast atypical kinase ABC1K1.Frontiers in plant science · 2024Article
- Diversification of Plastid Structure and Function in Land Plants.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Carotenoid composition and sequestration in cassava (Manihot esculentum Crantz) roots.PloS one · 2024Article
- Fibrillin gene family and its role in plant growth, development, and abiotic stress.Frontiers in plant science · 2024Review
144 more citing papers are in PubMed but not listed here.
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Plastoglobules (PGs) are oval or tubular lipid-rich structures present in all plastid types, but their specific functions are unclear. PGs contain quinones, alpha-tocopherol, and lipids and, in chromoplasts, carotenoids as well. It is not known whether PGs contain any enzymes or regulatory proteins. Here, we determined the proteome of PGs from chloroplasts of stressed and unstressed leaves of Arabidopsis (Arabidopsis thaliana) as well as from pepper (Capsicum annuum) fruit chromoplasts using mass spectrometry. Together, this showed that the proteome of chloroplast PGs consists of seven fibrillins, providing a protein coat and preventing coalescence of the PGs, and an additional 25 proteins likely involved in metabolism of isoprenoid-derived molecules (quinines and tocochromanols), lipids, and carotenoid cleavage. Four unknown ABC1 kinases were identified, possibly involved in regulation of quinone monooxygenases. Most proteins have not been observed earlier but have predicted N-terminal chloroplast transit peptides and lack transmembrane domains, consistent with localization in the PG lipid monolayer particles. Quantitative differences in PG composition in response to high light stress and degreening were determined by differential stable-isotope labeling using formaldehyde. More than 20 proteins were identified in the PG proteome of pepper chromoplasts, including four enzymes of carotenoid biosynthesis and several homologs of proteins observed in the chloroplast PGs. Our data strongly suggest that PGs in chloroplasts form a functional metabolic link between the inner envelope and thylakoid membranes and play a role in breakdown of carotenoids and oxidative stress defense, whereas PGs in chromoplasts are also an active site for carotenoid conversions.
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