1
|
Omkar S, Shrader C, Hoskins JR, Kline JT, Mitchem MM, Nitika, Fornelli L, Wickner S, Truman AW. Acetylation of the yeast Hsp40 chaperone protein Ydj1 fine-tunes proteostasis and translational fidelity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.13.598777. [PMID: 38915721 PMCID: PMC11195281 DOI: 10.1101/2024.06.13.598777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Proteostasis, the maintenance of cellular protein balance, is essential for cell viability and is highly conserved across all organisms. Newly synthesized proteins, or "clients," undergo sequential processing by Hsp40, Hsp70, and Hsp90 chaperones to achieve proper folding and functionality. Despite extensive characterization of post-translational modifications (PTMs) on Hsp70 and Hsp90, the modifications on Hsp40 remain less understood. This study aims to elucidate the role of lysine acetylation on the yeast Hsp40, Ydj1. By mutating acetylation sites on Ydj1's J-domain to either abolish or mimic constitutive acetylation, we observed that preventing acetylation had no noticeable phenotypic impact, whereas acetyl-mimic mutants exhibited various defects indicative of impaired Ydj1 function. Proteomic analysis revealed several Ydj1 interactions affected by J-domain acetylation, notably with proteins involved in translation. Further investigation uncovered a novel role for Ydj1 acetylation in stabilizing ribosomal subunits and ensuring translational fidelity. Our data suggest that acetylation may facilitate the transfer of Ydj1 between Ssa1 and Hsp82. Collectively, this work highlights the critical role of Ydj1 acetylation in proteostasis and translational fidelity.
Collapse
Affiliation(s)
- Siddhi Omkar
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223 USA
| | - Courtney Shrader
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223 USA
| | - Joel R. Hoskins
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jake T. Kline
- School of Biological Sciences, University of Oklahoma, Norman, OK 73019 USA
| | - Megan M. Mitchem
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223 USA
| | - Nitika
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223 USA
| | - Luca Fornelli
- School of Biological Sciences, University of Oklahoma, Norman, OK 73019 USA
| | - Sue Wickner
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Andrew W. Truman
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223 USA
| |
Collapse
|
2
|
Kulagin KA, Starodubova ES, Osipova PJ, Lipatova AV, Cherdantsev IA, Poddubko SV, Karpov VL, Karpov DS. Synergistic Effect of a Combination of Proteasome and Ribonucleotide Reductase Inhibitors in a Biochemical Model of the Yeast Saccharomyces cerevisiae and a Glioblastoma Cell Line. Int J Mol Sci 2024; 25:3977. [PMID: 38612788 PMCID: PMC11011839 DOI: 10.3390/ijms25073977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 03/31/2024] [Accepted: 04/02/2024] [Indexed: 04/14/2024] Open
Abstract
Proteasome inhibitors are used in the therapy of several cancers, and clinical trials are underway for their use in the treatment of glioblastoma (GBM). However, GBM becomes resistant to chemotherapy relatively rapidly. Recently, the overexpression of ribonucleotide reductase (RNR) genes was found to mediate therapy resistance in GBM. The use of combinations of chemotherapeutic agents is considered a promising direction in cancer therapy. The present work aimed to evaluate the efficacy of the combination of proteasome and RNR inhibitors in yeast and GBM cell models. We have shown that impaired proteasome function results in increased levels of RNR subunits and increased enzyme activity in yeast. Co-administration of the proteasome inhibitor bortezomib and the RNR inhibitor hydroxyurea was found to significantly reduce the growth rate of S. cerevisiae yeast. Accordingly, the combination of bortezomib and another RNR inhibitor gemcitabine reduced the survival of DBTRG-05MG compared to the HEK293 cell line. Thus, yeast can be used as a simple model to evaluate the efficacy of combinations of proteasome and RNR inhibitors.
Collapse
Affiliation(s)
- Kirill A. Kulagin
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (K.A.K.); (E.S.S.); (P.J.O.); (A.V.L.); (I.A.C.)
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Elizaveta S. Starodubova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (K.A.K.); (E.S.S.); (P.J.O.); (A.V.L.); (I.A.C.)
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Pamila J. Osipova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (K.A.K.); (E.S.S.); (P.J.O.); (A.V.L.); (I.A.C.)
- Institute of Biomedical Problems of Russian Academy of Sciences, 123007 Moscow, Russia;
| | - Anastasia V. Lipatova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (K.A.K.); (E.S.S.); (P.J.O.); (A.V.L.); (I.A.C.)
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Igor A. Cherdantsev
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (K.A.K.); (E.S.S.); (P.J.O.); (A.V.L.); (I.A.C.)
| | - Svetlana V. Poddubko
- Institute of Biomedical Problems of Russian Academy of Sciences, 123007 Moscow, Russia;
| | - Vadim L. Karpov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| | - Dmitry S. Karpov
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (K.A.K.); (E.S.S.); (P.J.O.); (A.V.L.); (I.A.C.)
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia;
| |
Collapse
|
3
|
Mitchem MM, Shrader C, Abedi E, Truman AW. Novel insights into the post-translational modifications of Ydj1/DNAJA1 co-chaperones. Cell Stress Chaperones 2024; 29:1-9. [PMID: 38309209 PMCID: PMC10939075 DOI: 10.1016/j.cstres.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/18/2023] [Accepted: 11/04/2023] [Indexed: 02/05/2024] Open
Abstract
The activity of the Hsp70 molecular chaperone is regulated by a suite of helper co-chaperones that include J-proteins. Studies on J-proteins have historically focused on their expression, localization, and activation of Hsp70. There is growing evidence that the post-translational modifications (PTMs) of chaperones (the chaperone code) fine-tune chaperone function. This mini-review summarizes the current understanding of the role and regulation of PTMs on the major J-proteins Ydj1 and DNAJA1. Understanding these PTMs may provide novel therapeutic avenues for targeting chaperone activity in cancer and neurodegenerative diseases.
Collapse
Affiliation(s)
- Megan M Mitchem
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223, USA
| | - Courtney Shrader
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223, USA
| | - Elizabeth Abedi
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223, USA
| | - Andrew W Truman
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, NC 28223, USA.
| |
Collapse
|
4
|
Huang Y, Lu C, Wang H, Gu L, Fu YX, Li GM. DNAJA2 deficiency activates cGAS-STING pathway via the induction of aberrant mitosis and chromosome instability. Nat Commun 2023; 14:5246. [PMID: 37640708 PMCID: PMC10462666 DOI: 10.1038/s41467-023-40952-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 08/17/2023] [Indexed: 08/31/2023] Open
Abstract
Molecular chaperone HSP70s are attractive targets for cancer therapy, but their substrate broadness and functional non-specificity have limited their role in therapeutical success. Functioning as HSP70's cochaperones, HSP40s determine the client specificity of HSP70s, and could be better targets for cancer therapy. Here we show that tumors defective in HSP40 member DNAJA2 are benefitted from immune-checkpoint blockade (ICB) therapy. Mechanistically, DNAJA2 maintains centrosome homeostasis by timely degrading key centriolar satellite proteins PCM1 and CEP290 via HSC70 chaperone-mediated autophagy (CMA). Tumor cells depleted of DNAJA2 or CMA factor LAMP2A exhibit elevated levels of centriolar satellite proteins, which causes aberrant mitosis characterized by abnormal spindles, chromosome missegregation and micronuclei formation. This activates the cGAS-STING pathway to enhance ICB therapy response in tumors derived from DNAJA2-deficient cells. Our study reveals a role for DNAJA2 to regulate mitotic division and chromosome stability and suggests DNAJA2 as a potential target to enhance cancer immunotherapy, thereby providing strategies to advance HSPs-based cancer therapy.
Collapse
Affiliation(s)
- Yaping Huang
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Changzheng Lu
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Institute of Cancer Research, Shenzhen Bay Laboratory, Shenzhen, China
| | - Hanzhi Wang
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Liya Gu
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Yang-Xin Fu
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
- Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing, China.
| | - Guo-Min Li
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX, USA.
- Chinese Institutes for Medical Research, Beijing, China.
| |
Collapse
|
5
|
Kinger S, Dubey AR, Kumar P, Jagtap YA, Choudhary A, Kumar A, Prajapati VK, Dhiman R, Mishra A. Molecular Chaperones' Potential against Defective Proteostasis of Amyotrophic Lateral Sclerosis. Cells 2023; 12:cells12091302. [PMID: 37174703 PMCID: PMC10177248 DOI: 10.3390/cells12091302] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a neuronal degenerative condition identified via a build-up of mutant aberrantly folded proteins. The native folding of polypeptides is mediated by molecular chaperones, preventing their pathogenic aggregation. The mutant protein expression in ALS is linked with the entrapment and depletion of chaperone capacity. The lack of a thorough understanding of chaperones' involvement in ALS pathogenesis presents a significant challenge in its treatment. Here, we review how the accumulation of the ALS-linked mutant FUS, TDP-43, SOD1, and C9orf72 proteins damage cellular homeostasis mechanisms leading to neuronal loss. Further, we discuss how the HSP70 and DNAJ family co-chaperones can act as potential targets for reducing misfolded protein accumulation in ALS. Moreover, small HSPB1 and HSPB8 chaperones can facilitate neuroprotection and prevent stress-associated misfolded protein apoptosis. Designing therapeutic strategies by pharmacologically enhancing cellular chaperone capacity to reduce mutant protein proteotoxic effects on ALS pathomechanisms can be a considerable advancement. Chaperones, apart from directly interacting with misfolded proteins for protein quality control, can also filter their toxicity by initiating strong stress-response pathways, modulating transcriptional expression profiles, and promoting anti-apoptotic functions. Overall, these properties of chaperones make them an attractive target for gaining fundamental insights into misfolded protein disorders and designing more effective therapies against ALS.
Collapse
Affiliation(s)
- Sumit Kinger
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| | - Ankur Rakesh Dubey
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| | - Prashant Kumar
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| | - Yuvraj Anandrao Jagtap
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| | - Akash Choudhary
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| | - Amit Kumar
- Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, Indore 453552, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Ajmer 305817, India
| | - Rohan Dhiman
- Laboratory of Mycobacterial Immunology, Department of Life Science, National Institute of Technology, Rourkela 769008, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342037, India
| |
Collapse
|
6
|
Yeast Ribonucleotide Reductase Is a Direct Target of the Proteasome and Provides Hyper Resistance to the Carcinogen 4-NQO. J Fungi (Basel) 2023; 9:jof9030351. [PMID: 36983519 PMCID: PMC10057556 DOI: 10.3390/jof9030351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 03/05/2023] [Accepted: 03/10/2023] [Indexed: 03/15/2023] Open
Abstract
Various external and internal factors damaging DNA constantly disrupt the stability of the genome. Cells use numerous dedicated DNA repair systems to detect damage and restore genomic integrity in a timely manner. Ribonucleotide reductase (RNR) is a key enzyme providing dNTPs for DNA repair. Molecular mechanisms of indirect regulation of yeast RNR activity are well understood, whereas little is known about its direct regulation. The study was aimed at elucidation of the proteasome-dependent mechanism of direct regulation of RNR subunits in Saccharomyces cerevisiae. Proteome analysis followed by Western blot, RT-PCR, and yeast plating analysis showed that upregulation of RNR by proteasome deregulation is associated with yeast hyper resistance to 4-nitroquinoline-1-oxide (4-NQO), a UV-mimetic DNA-damaging drug used in animal models to study oncogenesis. Inhibition of RNR or deletion of RNR regulatory proteins reverses the phenotype of yeast hyper resistance to 4-NQO. We have shown for the first time that the yeast Rnr1 subunit is a substrate of the proteasome, which suggests a common mechanism of RNR regulation in yeast and mammals.
Collapse
|
7
|
Nitika, Zheng B, Ruan L, Kline JT, Omkar S, Sikora J, Texeira Torres M, Wang Y, Takakuwa JE, Huguet R, Klemm C, Segarra VA, Winters MJ, Pryciak PM, Thorpe PH, Tatebayashi K, Li R, Fornelli L, Truman AW. Comprehensive characterization of the Hsp70 interactome reveals novel client proteins and interactions mediated by posttranslational modifications. PLoS Biol 2022; 20:e3001839. [PMID: 36269765 PMCID: PMC9629621 DOI: 10.1371/journal.pbio.3001839] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 11/02/2022] [Accepted: 09/21/2022] [Indexed: 01/06/2023] Open
Abstract
Hsp70 interactions are critical for cellular viability and the response to stress. Previous attempts to characterize Hsp70 interactions have been limited by their transient nature and the inability of current technologies to distinguish direct versus bridged interactions. We report the novel use of cross-linking mass spectrometry (XL-MS) to comprehensively characterize the Saccharomyces cerevisiae (budding yeast) Hsp70 protein interactome. Using this approach, we have gained fundamental new insights into Hsp70 function, including definitive evidence of Hsp70 self-association as well as multipoint interaction with its client proteins. In addition to identifying a novel set of direct Hsp70 interactors that can be used to probe chaperone function in cells, we have also identified a suite of posttranslational modification (PTM)-associated Hsp70 interactions. The majority of these PTMs have not been previously reported and appear to be critical in the regulation of client protein function. These data indicate that one of the mechanisms by which PTMs contribute to protein function is by facilitating interaction with chaperones. Taken together, we propose that XL-MS analysis of chaperone complexes may be used as a unique way to identify biologically important PTMs on client proteins.
Collapse
Affiliation(s)
- Nitika
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, North Carolina, United States America
| | - Bo Zheng
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, North Carolina, United States America
| | - Linhao Ruan
- Center for Cell Dynamics and Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States America
- Biochemistry, Cellular and Molecular Biology (BCMB) Graduate Program, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States America
| | - Jake T. Kline
- Department of Biology, University of Oklahoma, Norman, Oklahoma, United States America
| | - Siddhi Omkar
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, North Carolina, United States America
| | - Jacek Sikora
- Department of Molecular Biosciences, Department of Chemistry, and the Feinberg School of Medicine, Northwestern University, Evanston, Illinois, United States America
| | - Mara Texeira Torres
- School of Biological and Chemical Sciences, Queen Mary University, London, United Kingdom
| | - Yuhao Wang
- Center for Cell Dynamics and Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States America
- Biochemistry, Cellular and Molecular Biology (BCMB) Graduate Program, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States America
| | - Jade E. Takakuwa
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, North Carolina, United States America
| | - Romain Huguet
- Thermo Scientific, San Jose, California, United States America
| | - Cinzia Klemm
- School of Biological and Chemical Sciences, Queen Mary University, London, United Kingdom
| | - Verónica A. Segarra
- Departments of Biological Sciences and Chemistry, Goucher College, Baltimore, Maryland, United States America
| | - Matthew J. Winters
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts, United States America
| | - Peter M. Pryciak
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts, United States America
| | - Peter H. Thorpe
- School of Biological and Chemical Sciences, Queen Mary University, London, United Kingdom
| | - Kazuo Tatebayashi
- Laboratory of Molecular Genetics, Frontier Research Unit, Institute of Medical Science, The University of Tokyo, Tokyo, Japan
- Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Rong Li
- Center for Cell Dynamics and Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States America
- Biochemistry, Cellular and Molecular Biology (BCMB) Graduate Program, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States America
- Mechanobiology Institute and Department of Biological Sciences, National University of Singapore, Singapore
- Department of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, Maryland, United States America
| | - Luca Fornelli
- Department of Biology, University of Oklahoma, Norman, Oklahoma, United States America
| | - Andrew W. Truman
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, North Carolina, United States America
| |
Collapse
|
8
|
Omkar S, Wani TH, Zheng B, Mitchem MM, Truman AW. The APE2 Exonuclease Is a Client of the Hsp70–Hsp90 Axis in Yeast and Mammalian Cells. Biomolecules 2022; 12:biom12070864. [PMID: 35883419 PMCID: PMC9312491 DOI: 10.3390/biom12070864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/18/2022] [Accepted: 06/18/2022] [Indexed: 12/10/2022] Open
Abstract
Molecular chaperones such as Hsp70 and Hsp90 help fold and activate proteins in important signal transduction pathways that include DNA damage response (DDR). Previous studies have suggested that the levels of the mammalian APE2 exonuclease, a protein critical for DNA repair, may be dependent on chaperone activity. In this study, we demonstrate that the budding yeast Apn2 exonuclease interacts with molecular chaperones Ssa1 and Hsp82 and the co-chaperone Ydj1. Although Apn2 does not display a binding preference for any specific cytosolic Hsp70 or Hsp90 paralog, Ssa1 is unable to support Apn2 stability when present as the sole Ssa in the cell. Demonstrating conservation of this mechanism, the exonuclease APE2 also binds to Hsp70 and Hsp90 in mammalian cells. Inhibition of chaperone function via specific small molecule inhibitors results in a rapid loss of APE2 in a range of cancer cell lines. Taken together, these data identify APE2 and Apn2 as clients of the chaperone system in yeast and mammalian cells and suggest that chaperone inhibition may form the basis of novel anticancer therapies that target APE2-mediated processes.
Collapse
|
9
|
Ring J, Tadic J, Ristic S, Poglitsch M, Bergmann M, Radic N, Mossmann D, Liang Y, Maglione M, Jerkovic A, Hajiraissi R, Hanke M, Küttner V, Wolinski H, Zimmermann A, Domuz Trifunović L, Mikolasch L, Moretti DN, Broeskamp F, Westermayer J, Abraham C, Schauer S, Dammbrueck C, Hofer SJ, Abdellatif M, Grundmeier G, Kroemer G, Braun RJ, Hansen N, Sommer C, Ninkovic M, Seba S, Rockenfeller P, Vögtle F, Dengjel J, Meisinger C, Keller A, Sigrist SJ, Eisenberg T, Madeo F. The HSP40 chaperone Ydj1 drives amyloid beta 42 toxicity. EMBO Mol Med 2022; 14:e13952. [PMID: 35373908 PMCID: PMC9081910 DOI: 10.15252/emmm.202113952] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 01/22/2023] Open
Abstract
Amyloid beta 42 (Abeta42) is the principal trigger of neurodegeneration during Alzheimer's disease (AD). However, the etiology of its noxious cellular effects remains elusive. In a combinatory genetic and proteomic approach using a yeast model to study aspects of intracellular Abeta42 toxicity, we here identify the HSP40 family member Ydj1, the yeast orthologue of human DnaJA1, as a crucial factor in Abeta42-mediated cell death. We demonstrate that Ydj1/DnaJA1 physically interacts with Abeta42 (in yeast and mouse), stabilizes Abeta42 oligomers, and mediates their translocation to mitochondria. Consequently, deletion of YDJ1 strongly reduces co-purification of Abeta42 with mitochondria and prevents Abeta42-induced mitochondria-dependent cell death. Consistently, purified DnaJ chaperone delays Abeta42 fibrillization in vitro, and heterologous expression of human DnaJA1 induces formation of Abeta42 oligomers and their deleterious translocation to mitochondria in vivo. Finally, downregulation of the Ydj1 fly homologue, Droj2, improves stress resistance, mitochondrial morphology, and memory performance in a Drosophila melanogaster AD model. These data reveal an unexpected and detrimental role for specific HSP40s in promoting hallmarks of Abeta42 toxicity.
Collapse
|
10
|
The C-terminal domain of Hsp70 is responsible for paralog-specific regulation of ribonucleotide reductase. PLoS Genet 2022; 18:e1010079. [PMID: 35417483 PMCID: PMC9037926 DOI: 10.1371/journal.pgen.1010079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 04/25/2022] [Accepted: 03/21/2022] [Indexed: 11/23/2022] Open
Abstract
The Hsp70 family of molecular chaperones is well-conserved and expressed in all organisms. In budding yeast, cells express four highly similar cytosolic Hsp70s Ssa1, 2, 3 and 4 which arose from gene duplication. Ssa1 and 2 are constitutively expressed while Ssa3 and 4 are induced upon heat shock. Recent evidence suggests that despite their amino acid similarity, these Ssas have unique roles in the cell. Here we examine the relative importance of Ssa1-4 in the regulation of the enzyme ribonucleotide reductase (RNR). We demonstrate that cells expressing either Ssa3 or Ssa4 as their sole Ssa are compromised for their resistance to DNA damaging agents and activation of DNA damage response (DDR)-regulated transcription. In addition, we show that the steady state levels and stability of RNR small subunits Rnr2 and Rnr4 are reduced in Ssa3 or Ssa4-expressing cells, a result of decreased Ssa-RNR interaction. Interaction between the Hsp70 co-chaperone Ydj1 and RNR is correspondingly decreased in cells only expressing Ssa3 and 4. Through studies of Ssa2/4 domain swap chimeras, we determined that the C-terminal domain of Ssas are the source of this functional specificity. Taking together, our work suggests a distinct role for Ssa paralogs in regulating DNA replication mediated by C-terminus sequence variation. Cells require molecular chaperones to fold proteins into their active conformation. A major mystery however is why cells express so many highly-related and apparently redundant Hsp70 paralogs. We examined the role of four Hsp70 paralogs in budding yeast (Ssa1, 2, 3 and 4) on the activity of the ribonucleotide reductase (RNR complex). Importantly, we demonstrate there is selectivity of RNR subunits for Ssa1 and Ssa2 subunits, which is dictated by the co-chaperone Ydj1. Taken together, our work provides new insight into the functional specificity of Hsp70 paralogs using a native client protein.
Collapse
|
11
|
Role of Biomarkers in FLT3 AML. Cancers (Basel) 2022; 14:cancers14051164. [PMID: 35267471 PMCID: PMC8909069 DOI: 10.3390/cancers14051164] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 12/19/2022] Open
Abstract
Simple Summary Genetically heterogeneous disorder acute myeloid leukemia (AML) is marked by recurring mutations in FLT3. Current FLT3 inhibitors and other emerging inhibitors have helped in the improvement of the quality of standard of care therapies; however, the overall survival of the patients remains static. This is due to numerous mutations in FLT3, which causes resistance against these FLT3 inhibitors. For effective treatment of AML patients, alternative approaches are required to overcome this resistance. Here, we will summarize the biomarkers for FLT3 inhibitors in AML, as well as the alternative measures to overcome resistance to the current therapies. Abstract Acute myeloid leukemia is a disease characterized by uncontrolled proliferation of clonal myeloid blast cells that are incapable of maturation to leukocytes. AML is the most common leukemia in adults and remains a highly fatal disease with a five-year survival rate of 24%. More than 50% of AML patients have mutations in the FLT3 gene, rendering FLT3 an attractive target for small-molecule inhibition. Currently, there are several FLT3 inhibitors in the clinic, and others remain in clinical trials. However, these inhibitors face challenges due to lack of efficacy against several FLT3 mutants. Therefore, the identification of biomarkers is vital to stratify AML patients and target AML patient population with a particular FLT3 mutation. Additionally, there is an unmet need to identify alternative approaches to combat the resistance to FLT3 inhibitors. Here, we summarize the current knowledge on the utilization of diagnostic, prognostic, predictive, and pharmacodynamic biomarkers for FLT3-mutated AML. The resistance mechanisms to various FLT3 inhibitors and alternative approaches to combat this resistance are also discussed and presented.
Collapse
|
12
|
Knighton LE, Nitika, Wani TH, Truman AW. Chemogenomic and bioinformatic profiling of ERdj paralogs underpins their unique roles in cancer. Cell Stress Chaperones 2021; 27:135-147. [PMID: 35129801 PMCID: PMC8943095 DOI: 10.1007/s12192-022-01256-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 01/17/2022] [Accepted: 01/22/2022] [Indexed: 12/22/2022] Open
Abstract
The ER-resident Hsp70 paralog BiP is important in cellular homeostasis as well as in cancer cell progression. Although several BiP inhibitors have been developed, they have not succeeded in clinical trials due to toxicity issues. ER-resident co-chaperones (ERdjs) tailor the activity and specificity of BiP. Here, we report multiple-cancer analyses of BiP and ERdj genomic alterations including mRNA expression from cancer patients using available data from The Cancer Genome Atlas (TCGA). We examine the individual roles of BiP co-chaperones ERdj1-8 in mediating anticancer drug resistance through chemogenomic screening of ERdj1-8 CRISPR KO cells. In keeping with the idea that ERdjs regulate distinct facets of proteostasis, we find that each ERdj KO displays a unique signature of drug resistance. Taken together, our results demonstrate a novel way to understand functional specificity of ERdjs, suggesting a future personalized medicine approach, whereby ERdj mutation status is assessed to design an effective anticancer treatment plan.
Collapse
Affiliation(s)
- Laura E Knighton
- Department of Biological Sciences, University of North Carolina Charlotte, Charlotte, NC, 28223, USA
| | - Nitika
- Department of Biological Sciences, University of North Carolina Charlotte, Charlotte, NC, 28223, USA
| | - Tasaduq H Wani
- Department of Biological Sciences, University of North Carolina Charlotte, Charlotte, NC, 28223, USA
| | - Andrew W Truman
- Department of Biological Sciences, University of North Carolina Charlotte, Charlotte, NC, 28223, USA.
| |
Collapse
|
13
|
Abstract
The importance of molecular chaperones in cancer is well established, yet several chaperone inhibitors have failed in clinical trials due to toxicity. Recent efforts have focused on targeting chaperone function in cancer by either manipulating the “chaperone code” or inhibiting helper cochaperones, such as DNAJA1. Tong et al. identify a novel inhibitor that specifically disrupts DNAJA1's interaction with p53, promoting p53 degradation. This finding highlights specific DNAJA1 interactions with the potential for less toxicity compared to traditional chaperone inhibitors.
Collapse
|
14
|
Gao S, Pu N, Yin H, Li J, Chen Q, Yang M, Lou W, Chen Y, Zhou G, Li C, Li G, Yan Z, Liu L, Yu J, Wang X. Radiofrequency ablation in combination with an mTOR inhibitor restrains pancreatic cancer growth induced by intrinsic HSP70. Ther Adv Med Oncol 2020; 12:1758835920953728. [PMID: 32973929 PMCID: PMC7491221 DOI: 10.1177/1758835920953728] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/06/2020] [Indexed: 02/06/2023] Open
Abstract
Background Radiofrequency ablation (RFA) is widely used in palliative therapy of malignant cancers. Several studies have shown its applicability and safety for locally advanced pancreatic cancer (LAPC). The objective of this study was to modify the current regimen to improve its therapeutic effect. Methods Immune cell subtypes and related cytokines were quantified to uncover the immune pattern changes post-RFA treatment. Then, high-throughput proteome analysis was performed to identify differentially expressed proteins associated with RFA, which were further validated in in vitro and in vivo experiments. Finally, a combined therapy was tested in a murine model to observe its therapeutic effect. Results In preclinical murine models of RFA treatment, no significant therapeutic benefit was observed following RFA treatment. However, the proportion of tumor-infiltrating CD8+ T cells was significantly increased, whereas that of regulatory T cells (Tregs) was decreased post-RFA treatment, which indicated a beneficial anti-tumor environment. To identify the mechanism, high-throughput mass spectrum was obtained that identified heat shock protein 70 (HSP70) as the top differentially expressed protein. HSP70 expression in residual cancer cells was significantly increased post-RFA treatment, which notably promoted pancreatic cancer growth. Elevated HSP70 promoted cell proliferation by activating AKT-mTOR signaling. Finally, RFA treatment combined with an mTOR inhibitor exerted a synergetic repressive effect on tumor growth in the preclinical murine cancer model. Conclusions RFA treatment in combination with mTOR signaling blockade can not only promote tumor immune response, but also restrain residual cancer cell proliferation. Such a combination may be a promising and effective therapeutic strategy for LAPC patients.
Collapse
Affiliation(s)
- Shanshan Gao
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ning Pu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hanlin Yin
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Junhao Li
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qiangda Chen
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Minjie Yang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Wenhui Lou
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yi Chen
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Guofeng Zhou
- Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Changyu Li
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Guoping Li
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhiping Yan
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lingxiao Liu
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, China
| | - Jun Yu
- Department of Surgery, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287, USA
| | - Xiaolin Wang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, China
| |
Collapse
|
15
|
Chemogenomic screening identifies the Hsp70 co-chaperone DNAJA1 as a hub for anticancer drug resistance. Sci Rep 2020; 10:13831. [PMID: 32796891 PMCID: PMC7429498 DOI: 10.1038/s41598-020-70764-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 07/29/2020] [Indexed: 02/06/2023] Open
Abstract
Heat shock protein 70 (Hsp70) is an important molecular chaperone that regulates oncoprotein stability and tumorigenesis. However, attempts to develop anti-chaperone drugs targeting molecules such as Hsp70 have been hampered by toxicity issues. Hsp70 is regulated by a suite of co-chaperone molecules that bring “clients” to the primary chaperone for efficient folding. Rather than targeting Hsp70 itself, here we have examined the feasibility of inhibiting the Hsp70 co-chaperone DNAJA1 as a novel anticancer strategy. We found DNAJA1 to be upregulated in a variety of cancers, suggesting a role in malignancy. To confirm this role, we screened the NIH Approved Oncology collection for chemical-genetic interactions with loss of DNAJA1 in cancer. 41 compounds showed strong synergy with DNAJA1 loss, whereas 18 dramatically lost potency. Several hits were validated using a DNAJA1 inhibitor (116-9e) in castration-resistant prostate cancer cell (CRPC) and spheroid models. Taken together, these results confirm that DNAJA1 is a hub for anticancer drug resistance and that DNAJA1 inhibition is a potent strategy to sensitize cancer cells to current and future therapeutics. The large change in drug efficacy linked to DNAJA1 suggests a personalized medicine approach where tumor DNAJA1 status may be used to optimize therapeutic strategy.
Collapse
|
16
|
Greene BL, Kang G, Cui C, Bennati M, Nocera DG, Drennan CL, Stubbe J. Ribonucleotide Reductases: Structure, Chemistry, and Metabolism Suggest New Therapeutic Targets. Annu Rev Biochem 2020; 89:45-75. [PMID: 32569524 PMCID: PMC7316142 DOI: 10.1146/annurev-biochem-013118-111843] [Citation(s) in RCA: 109] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ribonucleotide reductases (RNRs) catalyze the de novo conversion of nucleotides to deoxynucleotides in all organisms, controlling their relative ratios and abundance. In doing so, they play an important role in fidelity of DNA replication and repair. RNRs' central role in nucleic acid metabolism has resulted in five therapeutics that inhibit human RNRs. In this review, we discuss the structural, dynamic, and mechanistic aspects of RNR activity and regulation, primarily for the human and Escherichia coli class Ia enzymes. The unusual radical-based organic chemistry of nucleotide reduction, the inorganic chemistry of the essential metallo-cofactor biosynthesis/maintenance, the transport of a radical over a long distance, and the dynamics of subunit interactions all present distinct entry points toward RNR inhibition that are relevant for drug discovery. We describe the current mechanistic understanding of small molecules that target different elements of RNR function, including downstream pathways that lead to cell cytotoxicity. We conclude by summarizing novel and emergent RNR targeting motifs for cancer and antibiotic therapeutics.
Collapse
Affiliation(s)
- Brandon L Greene
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, USA
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Gyunghoon Kang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
| | - Chang Cui
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Marina Bennati
- Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
- Department of Chemistry, University of Göttingen, 37073 Göttingen, Germany
| | - Daniel G Nocera
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Catherine L Drennan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - JoAnne Stubbe
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
- Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| |
Collapse
|
17
|
Zong T, Yin J, Jin T, Wang L, Luo M, Li K, Zhi H. A DnaJ protein that interacts with soybean mosaic virus coat protein serves as a key susceptibility factor for viral infection. Virus Res 2020; 281:197870. [PMID: 31962064 DOI: 10.1016/j.virusres.2020.197870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/15/2020] [Accepted: 01/18/2020] [Indexed: 12/11/2022]
Abstract
Soybean mosaic virus (SMV)-disease is one of the most serious and widespread diseases in soybean (Glycine max). In the present study, a DnaJ protein in soybean designated GmCPIP (SMV coat protein-interacting protein) was screened by the QIS-Seq (quantitative interactor screening with next-generation sequencing) method, and the interaction between SMV CP and GmCPIP was confirmed by the yeast two-hybrid (Y2H) system and bimolecular fluorescence complementation (BiFC) assay. Subcellular localization analysis indicated that both proteins are localized in the cytoplasm, cytomembrane and nucleus. Quantitative real-time polymerase chain reaction (qRT-PCR) analysis showed that infection with SMV-SC4 temporarily increased the transcription of GmCPIP. Virus-induced gene silencing (VIGS) down-regulated the GmCPIP gene by 82%, and the accumulation of SMV was decreased by 88.6% in GmCPIP-silenced plants inoculated with SMV-SC4. The interaction of GmCPIP with SMV CP seems to contribute to SMV infection in soybean.
Collapse
Affiliation(s)
- Tingxuan Zong
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - Jinlong Yin
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - Tongtong Jin
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - Liqun Wang
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - Minxuan Luo
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - Kai Li
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China.
| | - Haijian Zhi
- National Center for Soybean Improvement, National Key Laboratory for Crop Genetics and Germplasm Enhancement, Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture, Nanjing Agricultural University, Weigang 1, Nanjing, China.
| |
Collapse
|
18
|
The Yeast Hsp70 Cochaperone Ydj1 Regulates Functional Distinction of Ssa Hsp70s in the Hsp90 Chaperoning Pathway. Genetics 2020; 215:683-698. [PMID: 32299842 DOI: 10.1534/genetics.120.303190] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 04/13/2020] [Indexed: 01/23/2023] Open
Abstract
Heat-shock protein (Hsp) 90 assists in the folding of diverse sets of client proteins including kinases and growth hormone receptors. Hsp70 plays a major role in many Hsp90 functions by interacting and modulating conformation of its substrates before being transferred to Hsp90s for final maturation. Each eukaryote contains multiple members of the Hsp70 family. However, the role of different Hsp70 isoforms in Hsp90 chaperoning actions remains unknown. Using v-Src as an Hsp90 substrate, we examined the role of each of the four yeast cytosolic Ssa Hsp70s in regulating Hsp90 functions. We show that the strain expressing stress-inducible Ssa3 or Ssa4, and the not constitutively expressed Ssa1 or Ssa2, as the sole Ssa Hsp70 isoform reduces v-Src-mediated growth defects. The study shows that although different Hsp70 isoforms interact similarly with Hsp90s, v-Src maturation is less efficient in strains expressing Ssa4 as the sole Hsp70. We further show that the functional distinction between Ssa2 and Ssa4 is regulated by its C-terminal domain. Further studies reveal that Ydj1, which is known to assist substrate transfer to Hsp70s, interacts relatively weakly with Ssa4 compared with Ssa2, which could be the basis for poor maturation of the Hsp90 client in cells expressing stress-inducible Ssa4 as the sole Ssa Hsp70. The study thus reveals a novel role of Ydj1 in determining the functional distinction among Hsp70 isoforms with respect to the Hsp90 chaperoning action.
Collapse
|
19
|
Gracia L, Lora G, Blair LJ, Jinwal UK. Therapeutic Potential of the Hsp90/Cdc37 Interaction in Neurodegenerative Diseases. Front Neurosci 2019; 13:1263. [PMID: 31824256 PMCID: PMC6882380 DOI: 10.3389/fnins.2019.01263] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 11/06/2019] [Indexed: 12/15/2022] Open
Abstract
Alzheimer's, Huntington's, and Parkinson's are devastating neurodegenerative diseases that are prevalent in the aging population. Patient care costs continue to rise each year, because there is currently no cure or disease modifying treatments for these diseases. Numerous efforts have been made to understand the molecular interactions governing the disease development. These efforts have revealed that the phosphorylation of proteins by kinases may play a critical role in the aggregation of disease-associated proteins, which is thought to contribute to neurodegeneration. Interestingly, a molecular chaperone complex consisting of the 90 kDa heat shock protein (Hsp90) and Cell Division Cycle 37 (Cdc37) has been shown to regulate the maturation of many of these kinases as well as regulate some disease-associated proteins directly. Thus, the Hsp90/Cdc37 complex may represent a potential drug target for regulating proteins linked to neurodegenerative diseases, through both direct and indirect interactions. Herein, we discuss the broad understanding of many Hsp90/Cdc37 pathways and how this protein complex may be a useful target to regulate the progression of neurodegenerative disease.
Collapse
Affiliation(s)
- Liam Gracia
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida-Health, Tampa, FL, United States
| | - Gabriella Lora
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida-Health, Tampa, FL, United States
| | - Laura J. Blair
- Department of Molecular Medicine, Byrd Alzheimer’s Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Umesh K. Jinwal
- Department of Pharmaceutical Sciences, Taneja College of Pharmacy, University of South Florida-Health, Tampa, FL, United States
| |
Collapse
|
20
|
Knighton LE, Nitika, Waller SJ, Strom O, Wolfgeher D, Reitzel AM, Truman AW. Dynamic remodeling of the interactomes of Nematostella vectensis Hsp70 isoforms under heat shock. J Proteomics 2019; 206:103416. [PMID: 31233900 DOI: 10.1016/j.jprot.2019.103416] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/24/2019] [Accepted: 06/10/2019] [Indexed: 02/07/2023]
Abstract
Heat shock protein 70s (Hsp70s) are a highly conserved class of molecular chaperones that fold a large proportion of the proteome. Nematostella vectensis (Nv) is an estuarine sea anemone that has emerged as a model species to characterize molecular responses to physiological stressors due to its exposure to diverse, extreme abiotic conditions. Previous transcriptional data has shown dramatic differences among expression profiles of three NvHsp70 isoforms (NvHsp70A, B and D) under stress but it is unknown if, and to what extent, the client proteins for these chaperones differ. In order to determine client specificity, NvHsp70A, B and D were expressed in Saccharomyces cerevisiae budding yeast lacking native Hsp70 and interacting proteins for each Hsp70 were determined with mass spectrometry in yeast ambient and heat shock conditions. Our analyses showed <50% of identified interacting proteins were common to all three anemone Hsp70s and 3-18% were unique to an individual Hsp70. Mapping of temperature induced interactions suggest that under stress a proportion of clients are transferred from NvHsp70A and NvHsp70D to NvHsp70B. Together, these data suggest a diverse set of interacting proteins for Hsp70 isoforms that likely determines the precise functions for Hsp70s in organismal acclimation and potentially adaptation. BIOLOGICAL SIGNIFICANCE: Although the Hsp70 family of molecular chaperones has been studied for >50 years, it is still not fully understood why organisms encode and express many highly-similar Hsp70 isoforms. The prevailing theory is that these isoforms have identical function, but are expressed under unique cellular conditions that include heat shock to cope with increased number of unfolded/misfolded proteins. The sea anemone Nematostella vectensis encodes three Hsp70 isoforms A, B and D that when expressed in yeast demonstrate unique functionalities. This study provides the interactome of NvHsp70s A, B and D and demonstrates that Hsp70 isoforms, while highly similar in sequence, have unique co-chaperone and client interactors.
Collapse
Affiliation(s)
- Laura E Knighton
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, USA
| | - Nitika
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, USA
| | - Shawn J Waller
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, USA
| | - Owen Strom
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, USA
| | - Donald Wolfgeher
- Department of Molecular Genetics and Cell Biology, The University of Chicago, Chicago, USA
| | - Adam M Reitzel
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, USA.
| | - Andrew W Truman
- Department of Biological Sciences, The University of North Carolina at Charlotte, Charlotte, USA.
| |
Collapse
|
21
|
Lotz SK, Knighton LE, Jones GW, Truman AW. Not quite the SSAme: unique roles for the yeast cytosolic Hsp70s. Curr Genet 2019; 65:1127-1134. [PMID: 31020385 DOI: 10.1007/s00294-019-00978-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/15/2019] [Accepted: 04/16/2019] [Indexed: 12/27/2022]
Abstract
The Heat Shock Protein 70s (Hsp70s) are an essential family of proteins involved in folding of new proteins and triaging of damaged proteins for proteasomal-mediated degradation. They are highly conserved in all organisms, with each organism possessing multiple highly similar Hsp70 variants (isoforms). These isoforms have been previously thought to be identical in function differing only in their spatio-temporal expression pattern. The model organism Saccharomyces cerevisiae (baker's yeast) expresses four Hsp70 isoforms Ssa1, 2, 3 and 4. Here, we review recent findings that suggest that despite their similarity, Ssa isoforms may have unique cellular functions.
Collapse
Affiliation(s)
- Sarah K Lotz
- Department of Biological Sciences, The University of North Carolina At Charlotte, Charlotte, NC, 28223, USA
| | - Laura E Knighton
- Department of Biological Sciences, The University of North Carolina At Charlotte, Charlotte, NC, 28223, USA
| | - Gary W Jones
- Centre for Biomedical Science Research, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds, UK
| | - Andrew W Truman
- Department of Biological Sciences, The University of North Carolina At Charlotte, Charlotte, NC, 28223, USA.
| |
Collapse
|
22
|
Novel insights into molecular chaperone regulation of ribonucleotide reductase. Curr Genet 2018; 65:477-482. [PMID: 30519713 DOI: 10.1007/s00294-018-0916-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 11/30/2018] [Accepted: 12/01/2018] [Indexed: 12/17/2022]
Abstract
The molecular chaperones Hsp70 and Hsp90 bind and fold a significant proportion of the proteome. They are responsible for the activity and stability of many disease-related proteins including those in cancer. Substantial effort has been devoted to developing a range of chaperone inhibitors for clinical use. Recent studies have identified the oncogenic ribonucleotide reductase (RNR) complex as an interactor of chaperones. While several generations of RNR inhibitor have been developed for use in cancer patients, many of these produce severe side effects such as nausea, vomiting and hair loss. Development of more potent, less patient-toxic anti-RNR strategies would be highly desirable. Inhibition of chaperones and associated co-chaperone molecules in both cancer and model organisms such as budding yeast result in the destabilization of RNR subunits and a corresponding sensitization to RNR inhibitors. Going forward, this may form part of a novel strategy to target cancer cells that are resistant to standard RNR inhibitors.
Collapse
|