ArticleInternational journal of molecular sciences2020
Biochemical Convergence of Mitochondrial Hsp70 System Specialized in Iron-Sulfur Cluster Biogenesis.
Article in International journal of molecular sciences, 2020. 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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Who cites it
13 citing papers in PubMed, 18 citations in OpenAlex.
- Roles ofInsects · 2026Article
- High-Throughput Platform for Discovery of Chemical Inhibitors of Heat Shock Protein 70 (Hsp70): Adaptation for the Specialized Bacterial HscA-HscB-IscU Complex.Chemical biology & drug design · 2026Article
- The cytochrome oxidase defect in ISC-depleted yeast is caused by impaired iron-sulfur cluster maturation of the mitoribosome assembly factor Rsm22.FEBS letters · 2025Article
- Pseudophosphorylation of single residues of the J-domain of DNAJA2 regulates the holding/folding balance of the Hsc70 system.Protein science : a publication of the Protein Society · 2024Article
- Mitochondria function in cytoplasmic FeS protein biogenesis.Biochimica et biophysica acta. Molecular cell research · 2024Review
- J-domain proteins: From molecular mechanisms to diseases.Cell stress & chaperones · 2024Article
- Analysis of Reconstituted Tripartite Complex Supports Avidity-based Recruitment of Hsp70 by Substrate Bound J-domain Protein.Journal of molecular biology · 2023Article
- The roles of molecular chaperones in regulating cell metabolism.FEBS letters · 2023Review
- J-domain protein chaperone circuits in proteostasis and disease.Trends in cell biology · 2023Review
- Iron Insertion at the Assembly Site of the ISCU Scaffold Protein Is a Conserved Process Initiating Fe-S Cluster Biosynthesis.Journal of the American Chemical Society · 2022Article
- Interaction of client-the scaffold on which FeS clusters are build-with J-domain protein Hsc20 and its evolving Hsp70 partners.Frontiers in molecular biosciences · 2022Review
- The Hsp70-Chaperone Machines in Bacteria.Frontiers in molecular biosciences · 2021Review
- Mitochondrial Protein Network: From Biogenesis to Bioenergetics in Health and Disease.International journal of molecular sciences · 2020Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 2 countries.
Funding
Abstract
Mitochondria play a central role in the biogenesis of iron-sulfur cluster(s) (FeS), protein cofactors needed for many cellular activities. After assembly on scaffold protein Isu, the cluster is transferred onto a recipient apo-protein. Transfer requires Isu interaction with an Hsp70 chaperone system that includes a dedicated J-domain protein co-chaperone (Hsc20). Hsc20 stimulates Hsp70's ATPase activity, thus stabilizing the critical Isu-Hsp70 interaction. While most eukaryotes utilize a multifunctional mitochondrial (mt)Hsp70, yeast employ another Hsp70 (Ssq1), a product of mtHsp70 gene duplication. Ssq1 became specialized in FeS biogenesis, recapitulating the process in bacteria, where specialized Hsp70 HscA cooperates exclusively with an ortholog of Hsc20. While it is well established that Ssq1 and HscA converged functionally for FeS transfer, whether these two Hsp70s possess similar biochemical properties was not known. Here, we show that overall HscA and Ssq1 biochemical properties are very similar, despite subtle differences being apparent - the ATPase activity of HscA is stimulated to a somewhat higher levels by Isu and Hsc20, while Ssq1 has a higher affinity for Isu and for Hsc20. HscA/Ssq1 are a unique example of biochemical convergence of distantly related Hsp70s, with practical implications, crossover experimental results can be combined, facilitating understanding of the FeS transfer process.
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Registered trials
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