ArticleThe Plant cell2003
Chloroplast unusual positioning1 is essential for proper chloroplast positioning.
Article in The Plant cell, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 117 papers.
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Who cites it
117 citing papers in PubMed, 259 citations in OpenAlex.
- Fingers for signaling? A possible role of stromules in intracellular communication.Plant physiology · 2026Article
- Size of chloroplasts in Arabidopsis mesophyll cells affects jasmonate biosynthesis.Plant biology (Stuttgart, Germany) · 2026Article
- PERSPECTIVE: organelle positioning as a principle of metabolic regulation and stress tolerance.The Plant journal : for cell and molecular biology · 2026Review
- Starch synthesis in Brachypodium distachyon endosperm occurs in dynamic, connected amyloplast compartments.The New phytologist · 2026Article
- Integrative QTL mapping and RNA-seq unravel the genetic architecture and candidate genes for ear shank length in a large maize-teosinte population.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2025Article
- Plant plastids: from evolutionary origins to functional specialization and organelle interactions.Journal of experimental botany · 2025Review
- Membrane contact sites between chloroplasts and the pathogen interface underpin plant focal immune responses.The Plant cell · 2025Article
- Recovery of the cortical chloroplast layer in the green algaFrontiers in plant science · 2025Article
- CHUP1 restricts chloroplast movement and effector-triggered immunity in epidermal cells.The New phytologist · 2024Article
- Strategies for adaptation to high light in plants.aBIOTECH · 2024Review
- Clinal Variation in Short Tandem Repeats Linked to Gene Expression in Sunflower (Biomolecules · 2024Article
- Chloroplast-actin filaments decide the direction of chloroplast avoidance movement under strong light in Arabidopsis thaliana.Journal of plant research · 2024Article
- Mapping parental DMRs predictive of local and distal methylome remodeling in epigenetic F1 hybrids.Life science alliance · 2024Article
- CHLOROPLAST UNUSUAL POSITIONING 1 is a plant-specific actin polymerization factor regulating chloroplast movement.The Plant cell · 2024Article
- UMAMIT44 is a key player in glutamate export from Arabidopsis chloroplasts.The Plant cell · 2024Article
- Probing the physiological role of the plastid outer-envelope membrane using the oemiR plasmid collection.G3 (Bethesda, Md.) · 2023Article
- Woronin body hitchhiking on early endosomes is dispensable for septal localization inMolecular biology of the cell · 2023Article
- FKF1 Interacts with CHUP1 and Regulates Chloroplast Movement in Arabidopsis.Plants (Basel, Switzerland) · 2023Article
- Woronin bodies move dynamically and bidirectionally by hitchhiking on early endosomes inbioRxiv : the preprint server for biology · 2023Article
- Chloroplasts in plant cells show active glassy behavior under low-light conditions.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
57 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The intracellular distribution of organelles is a crucial aspect of effective cell function. Chloroplasts change their intracellular positions to optimize photosynthetic activity in response to ambient light conditions. Through screening of mutants of Arabidopsis defective in chloroplast photorelocation movement, we isolated six mutant clones in which chloroplasts gathered at the bottom of the cells and did not distribute throughout cells. These mutants, termed chloroplast unusual positioning (chup), were shown to belong to a single genetic locus by complementation tests. Observation of the positioning of other organelles, such as mitochondria, peroxisomes, and nuclei, revealed that chloroplast positioning and movement are impaired specifically in this mutant, although peroxisomes are distributed along with chloroplasts. The CHUP1 gene encodes a novel protein containing multiple domains, including a coiled-coil domain, an actin binding domain, a Pro-rich region, and two Leu zipper domains. The N-terminal hydrophobic segment of CHUP1 was expressed transiently in leaf cells of Arabidopsis as a fusion protein with the green fluorescent protein. The fusion protein was targeted to envelope membranes of chloroplasts in mesophyll cells, suggesting that CHUP1 may localize in chloroplasts. A glutathione S-transferase fusion protein containing the actin binding domain of CHUP1 was found to bind F-actin in vitro. CHUP1 is a unique gene identified that encodes a protein required for organellar positioning and movement in plant cells.
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