ArticlePlant, cell & environment2022
The co-chaperone HOP participates in TIR1 stabilisation and in auxin response in plants.
Article in Plant, cell & environment, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 18 citations in OpenAlex.
- Salicylic acid modulates its catabolic enzymes via proteasomal degradation linked to SCF-associated proximity networks.Nature communications · 2026Article
- De-repression of protein phosphatase 5 by the chaperone organizer HOP1 activates plant NLR immunity.Nature plants · 2026Article
- Molecular Mechanisms of the Phytohormone-Heat Shock Protein Pathway in Regulating Plant Thermotolerance.Plants (Basel, Switzerland) · 2025Review
- Proximity proteomics reveals the molecular architecture of phytochrome B photobodies inbioRxiv : the preprint server for biology · 2025Article
- Research Progress on Responses and Regulatory Mechanisms of Plants Under High Temperature.Current issues in molecular biology · 2025Review
- Mitogen-Activated Protein Kinases 3/6 Reduce Auxin Signaling via Stabilizing Indoleacetic Acid-Induced Proteins 8/9 in Plant Abiotic Stress Adaptation.International journal of molecular sciences · 2025Article
- Hsp90: Bringing it all together.Cell stress & chaperones · 2025Review
- The role of the co-chaperone HOP in plant homeostasis during development and stress.Journal of experimental botany · 2024Review
- Time-Course Transcriptomic Analysis Reveals Molecular Insights into the Inflorescence and Flower Development ofPlants (Basel, Switzerland) · 2024Article
- HOP co-chaperones contribute to GA signaling by promoting the accumulation of the F-box protein SNE in Arabidopsis.Plant communications · 2023Article
- Transcriptome profiles of rice roots under simulated microgravity conditions and following gravistimulation.Frontiers in plant science · 2023Article
- The co-chaperone HOP participates in TIR1 stabilisation and in auxin response in plants.Plant, cell & environment · 2022Article
- TIR1/AFB proteins: Active players in abiotic and biotic stress signaling.Frontiers in plant science · 2022Review
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
HOP (HSP70-HSP90 organising protein) is a conserved family of co-chaperones well known in mammals for its role in the folding of signalling proteins associated with development. In plants, HOP proteins have been involved in the response to multiple stresses, but their role in plant development remains elusive. Herein, we describe that the members of the HOP family participate in different aspects of plant development as well as in the response to warm temperatures through the regulation of auxin signalling. Arabidopsis hop1 hop2 hop3 triple mutant shows different auxin-related phenotypes and a reduced auxin sensitivity. HOP interacts with TIR1 auxin coreceptor in vivo. Furthermore, TIR1 accumulation and auxin transcriptional response are reduced in the hop1 hop2 hop3 triple mutant, suggesting that HOP's function in auxin signalling is related, at least, to TIR1 interaction and stabilisation. Interestingly, HOP proteins form part of the same complexes as SGT1b (a different HSP90 co-chaperone) and these co-chaperones synergistically cooperate in auxin signalling. This study provides relevant data about the role of HOP in auxin regulation in plants and uncovers that both co-chaperones, SGT1b and HOP, cooperate in the stabilisation of common targets involved in plant development.
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