ArticleThe Plant cell2010
Stromal Hsp70 is important for protein translocation into pea and Arabidopsis chloroplasts.
Article in The Plant cell, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 115 papers.
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Who cites it
115 citing papers in PubMed, 188 citations in OpenAlex.
- Biogenic retrograde signaling via GUN1 ensures thermotolerant chloroplast biogenesis during seedling establishment in Arabidopsis thaliana.Journal of integrative plant biology · 2026Article
- Functional Interaction Between Toc75 POTRA1 Domain and Tic22-III in the Intermembrane Space During Chloroplast Protein Import.Plant direct · 2026Article
- Molecular mechanisms and breeding strategies for heat tolerance in vegetable crops under global warming.Horticulture research · 2026Article
- Chloroplast heat shock protein cpHsc70-1 interacts with thylakoid membrane remodeling protein VIPP1 C-terminal tail and controls VIPP1 oligomer assembly.PNAS nexus · 2026Article
- Proteostasis and protein quality control in chloroplasts: mechanisms and novel insights related to protein mislocalization.Journal of experimental botany · 2025Review
- High-efficiency leucoplast transit peptides for manipulating plastid protein production.Nature plants · 2025Article
- Regulatory and retrograde signaling networks in the chlorophyll biosynthetic pathway.Journal of integrative plant biology · 2025Review
- Expression analysis of the apple HSP70 gene family in abiotic stress and phytohormones and expression validation of candidate MdHSP70 genes.Scientific reports · 2024Article
- Silicon Modifies Photosynthesis Efficiency andGenes · 2024Article
- The MdHSC70-MdWRKY75 module mediates basal apple thermotolerance by regulating the expression of heat shock factor genes.The Plant cell · 2024Article
- Methyl viologen-induced changes in the Arabidopsis proteome implicate PATELLIN 4 in oxidative stress responses.Journal of experimental botany · 2024Article
- Genome-wide identification and expression analysis of3 Biotech · 2023Article
- Chloroplast import motor subunits FtsHi1 and FtsHi2 are located on opposite sides of the inner envelope membrane.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Chloroplast proteostasis: A story of birth, life, and death.Plant communications · 2023Review
- The journey of preproteins across the chloroplast membrane systems.Frontiers in physiology · 2023Review
- Understanding protein import in diverse non-green plastids.Frontiers in genetics · 2023Review
- Chloroplast protein import machinery and quality control.The FEBS journal · 2022Review
- GREEN FLUORESCENT PROTEIN variants with enhanced folding are more efficiently imported into chloroplasts.Plant physiology · 2022Article
- A proteostasis network safeguards the chloroplast proteome.Essays in biochemistry · 2022Review
- Regulation of heat shock proteins 70 and their role in plant immunity.Journal of experimental botany · 2022Review
55 more citing papers are in PubMed but not listed here.
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hsp70 family proteins function as motors driving protein translocation into mitochondria and the endoplasmic reticulum. Whether Hsp70 is involved in protein import into chloroplasts has not been resolved. We show here Arabidopsis thaliana knockout mutants of either of the two stromal cpHsc70s, cpHsc70-1 and cpHsc70-2, are defective in protein import into chloroplasts during early developmental stages. Protein import was found to be affected at the step of precursor translocation across the envelope membranes. From solubilized envelope membranes, stromal cpHsc70 was specifically coimmunoprecipitated with importing precursors and stoichiometric amounts of Tic110 and Hsp93. Moreover, in contrast with receptors at the outer envelope membrane, cpHsp70 is important for the import of both photosynthetic and nonphotosynthetic proteins. These data indicate that cpHsc70 is part of the chloroplast translocon for general import and is important for driving translocation into the stroma. We further analyzed the relationship of cpHsc70 with the other suggested motor system, Hsp93/Tic40. Chloroplasts from the cphsc70-1 hsp93-V double mutant had a more severe import defect than did the single mutants, suggesting that the two proteins function in parallel. The cphsc70-1 tic40 double knockout was lethal, further indicating that cpHsc70-1 and Tic40 have an overlapping essential function. In conclusion, our data indicate that chloroplasts have two chaperone systems facilitating protein translocation into the stroma: the cpHsc70 system and the Hsp93/Tic40 system.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.