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Sahu W, Bai T, Das A, Mukherjee S, Prusty A, Mallick NR, Elangovan S, Reddy KS. Plasmodium falciparum J-dot localized J domain protein A8iJp modulates the chaperone activity of human HSPA8. FEBS Lett 2024; 598:818-836. [PMID: 38418371 DOI: 10.1002/1873-3468.14836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 01/25/2024] [Accepted: 02/04/2024] [Indexed: 03/01/2024]
Abstract
Plasmodium falciparum renovates the host erythrocyte to survive during intraerythrocytic development. This renovation requires many parasite proteins to unfold and move outside the parasitophorous vacuolar membrane, and chaperone-regulated protein folding becomes essential for the exported proteins to function. We report on a type-IV J domain protein (JDP), PF3D7_1401100, which we found to be processed before export and trafficked inside the lumen of parasite-derived structures known as J-dots. We found this protein to have holdase activity, as well as stimulate the ATPase and aggregation suppression activity of the human HSP70 chaperone HsHSPA8; thus, we named it "HSPA8-interacting J protein" (A8iJp). Moreover, we found a subset of HsHSPA8 to co-localize with A8iJp inside the infected human erythrocyte. Our results suggest that A8iJp modulates HsHSPA8 chaperone activity and may play an important role in host erythrocyte renovation.
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Affiliation(s)
- Welka Sahu
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - Tapaswini Bai
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - Aleena Das
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - Subhadip Mukherjee
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - Aradhana Prusty
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - Nipa Rani Mallick
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - Selvakumar Elangovan
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
| | - K Sony Reddy
- School of Biotechnology, Kalinga Institute of Industrial Technology, Deemed to be University, Bhubaneswar, India
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2
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Chang YL, Yang CC, Huang YY, Chen YA, Yang CW, Liao CY, Li H, Wu CS, Lin CH, Teng SC. The HSP40 family chaperone isoform DNAJB6b prevents neuronal cells from tau aggregation. BMC Biol 2023; 21:293. [PMID: 38110916 PMCID: PMC10729500 DOI: 10.1186/s12915-023-01798-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 12/05/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Alzheimer's disease (AD) is the most common neurodegenerative disorder with clinical presentations of progressive cognitive and memory deterioration. The pathologic hallmarks of AD include tau neurofibrillary tangles and amyloid plaque depositions in the hippocampus and associated neocortex. The neuronal aggregated tau observed in AD cells suggests that the protein folding problem is a major cause of AD. J-domain-containing proteins (JDPs) are the largest family of cochaperones, which play a vital role in specifying and directing HSP70 chaperone functions. JDPs bind substrates and deliver them to HSP70. The association of JDP and HSP70 opens the substrate-binding domain of HSP70 to help the loading of the clients. However, in the initial HSP70 cycle, which JDP delivers tau to the HSP70 system in neuronal cells remains unclear. RESULTS We screened the requirement of a diverse panel of JDPs for preventing tau aggregation in the human neuroblastoma cell line SH-SY5Y by a filter retardation method. Interestingly, knockdown of DNAJB6, one of the JDPs, displayed tau aggregation and overexpression of DNAJB6b, one of the isoforms generated from the DNAJB6 gene by alternative splicing, reduced tau aggregation. Further, the tau bimolecular fluorescence complementation assay confirmed the DNAJB6b-dependent tau clearance. The co-immunoprecipitation and the proximity ligation assay demonstrated the protein-protein interaction between tau and the chaperone-cochaperone complex. The J-domain of DNAJB6b was critical for preventing tau aggregation. Moreover, reduced DNAJB6 expression and increased tau aggregation were detected in an age-dependent manner in immunohistochemical analysis of the hippocampus tissues of a mouse model of tau pathology. CONCLUSIONS In summary, downregulation of DNAJB6b increases the insoluble form of tau, while overexpression of DNAJB6b reduces tau aggregation. Moreover, DNAJB6b associates with tau. Therefore, this study reveals that DNAJB6b is a direct sensor for its client tau in the HSP70 folding system in neuronal cells, thus helping to prevent AD.
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Affiliation(s)
- Ya-Lan Chang
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Chan-Chih Yang
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Yun-Yu Huang
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Yi-An Chen
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Chia-Wei Yang
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Chia-Yu Liao
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan
| | - Hsun Li
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei, 10051, Taiwan
| | - Ching-Shyi Wu
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, 10051, Taiwan
| | - Chin-Hsien Lin
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei, 10051, Taiwan.
| | - Shu-Chun Teng
- Department of Microbiology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, 10051, Taiwan.
- Center of Precision Medicine, National Taiwan University, Taipei, 10051, Taiwan.
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3
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Du L, Wilson BAP, Li N, Shah R, Dalilian M, Wang D, Smith EA, Wamiru A, Goncharova EI, Zhang P, O’Keefe BR. Discovery and Synthesis of a Naturally Derived Protein Kinase Inhibitor that Selectively Inhibits Distinct Classes of Serine/Threonine Kinases. J Nat Prod 2023; 86:2283-2293. [PMID: 37843072 PMCID: PMC10616853 DOI: 10.1021/acs.jnatprod.3c00394] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Indexed: 10/17/2023]
Abstract
The DNAJB1-PRKACA oncogenic gene fusion results in an active kinase enzyme, J-PKAcα, that has been identified as an attractive antitumor target for fibrolamellar hepatocellular carcinoma (FLHCC). A high-throughput assay was used to identify inhibitors of J-PKAcα catalytic activity by screening the NCI Program for Natural Product Discovery (NPNPD) prefractionated natural product library. Purification of the active agent from a single fraction of an Aplidium sp. marine tunicate led to the discovery of two unprecedented alkaloids, aplithianines A (1) and B (2). Aplithianine A (1) showed potent inhibition against J-PKAcα with an IC50 of ∼1 μM in the primary screening assay. In kinome screening, 1 inhibited wild-type PKA with an IC50 of 84 nM. Further mechanistic studies including cocrystallization and X-ray diffraction experiments revealed that 1 inhibited PKAcα catalytic activity by competitively binding to the ATP pocket. Human kinome profiling of 1 against a panel of 370 kinases revealed potent inhibition of select serine/threonine kinases in the CLK and PKG families with IC50 values in the range ∼11-90 nM. An efficient, four-step total synthesis of 1 has been accomplished, enabling further evaluation of aplithianines as biologically relevant kinase inhibitors.
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Affiliation(s)
- Lin Du
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Brice A. P. Wilson
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Ning Li
- Center
for Structural Biology, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Rohan Shah
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Masoumeh Dalilian
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos
Biomedical Research, Frederick National
Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Dongdong Wang
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Emily A. Smith
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos
Biomedical Research, Frederick National
Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Antony Wamiru
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos
Biomedical Research, Frederick National
Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Ekaterina I. Goncharova
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Leidos
Biomedical Research, Frederick National
Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Ping Zhang
- Center
for Structural Biology, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Barry R. O’Keefe
- Molecular
Targets Program, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702, United States
- Natural
Products Branch, Development Therapeutics Program, Division of Cancer
Treatment and Diagnosis, National Cancer
Institute, Frederick, Maryland 21702, United States
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4
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de Jesus JR, Linhares LA, Aragão AZB, Arruda MAZ, Ramos CHI. The stability and function of human cochaperone Hsp40/DNAJA1 are affected by zinc removal and partially restored by copper. Biochimie 2023; 213:123-129. [PMID: 37244380 DOI: 10.1016/j.biochi.2023.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 05/11/2023] [Accepted: 05/16/2023] [Indexed: 05/29/2023]
Abstract
The imbalance in metal homeostasis can be associated with several human diseases, and exposure to increasing concentrations of metals promotes cell stress and toxicity. Therefore, understanding the cytotoxic effect of metal imbalance is important to unravel the biochemical mechanism of homeostasis and the action of potential protective proteins against metal toxicity. Several studies, including gene deletion in yeast, provide evidence indicating the possible indirect involvement of cochaperones from the Hsp40/DNAJA family in metal homeostasis, possibly through modulating the activity of Hsp 70.This work first investigated the effect of zinc and copper on the conformation and function of the human Hsp40 cochaperone DNAJA1, a zinc-binding protein. DNAJA1 was capable to complement the phenotype of a yeast strain deleted of the ydj1 gene, which was more sensitive to the presence of zinc and copper than the wild-type strain. To gain further insight about the role of the DNAJA family in metal binding, the recombinant human DNAJA1 protein was studied. Zinc removal from DNAJA1 affected both its stability and ability to act as a chaperone, i.e., to protect other proteins from aggregation. The reintroduction of zinc restored the native properties of DNAJA1 and, surprisingly, the addition of copper partially restored the native properties.
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Affiliation(s)
| | | | | | - Marco A Z Arruda
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, Brazil; National Institute of Science and Technology for Bioanalytics, Institute of Chemistry, University of Campinas UNICAMP, Campinas, Brazil
| | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, Brazil; National Institute of Science and Technology for Bioimage and Structural Biology INBEB, Brazil.
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5
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Wickramaratne AC, Liao JY, Doyle SM, Hoskins JR, Puller G, Scott ML, Alao JP, Obaseki I, Dinan JC, Maity TK, Jenkins LM, Kravats AN, Wickner S. J-domain Proteins form Binary Complexes with Hsp90 and Ternary Complexes with Hsp90 and Hsp70. J Mol Biol 2023; 435:168184. [PMID: 37348754 PMCID: PMC10527347 DOI: 10.1016/j.jmb.2023.168184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/26/2023] [Accepted: 06/14/2023] [Indexed: 06/24/2023]
Abstract
Hsp90 and Hsp70 are highly conserved molecular chaperones that help maintain proteostasis by participating in protein folding, unfolding, remodeling and activation of proteins. Both chaperones are also important for cellular recovery following environmental stresses. Hsp90 and Hsp70 function collaboratively for the remodeling and activation of some client proteins. Previous studies using E. coli and S. cerevisiae showed that residues in the Hsp90 middle domain directly interact with a region in the Hsp70 nucleotide binding domain, in the same region known to bind J-domain proteins. Importantly, J-domain proteins facilitate and stabilize the interaction between Hsp90 and Hsp70 both in E. coli and S. cerevisiae. To further explore the role of J-domain proteins in protein reactivation, we tested the hypothesis that J-domain proteins participate in the collaboration between Hsp90 and Hsp70 by simultaneously interacting with Hsp90 and Hsp70. Using E. coli Hsp90, Hsp70 (DnaK), and a J-domain protein (CbpA), we detected a ternary complex containing all three proteins. The interaction involved the J-domain of CbpA, the DnaK binding region of E. coli Hsp90, and the J-domain protein binding region of DnaK where Hsp90 also binds. Additionally, results show that E. coli Hsp90 interacts with E. coli J-domain proteins, DnaJ and CbpA, and that yeast Hsp90, Hsp82, interacts with a yeast J-domain protein, Ydj1. Together these results suggest that the complexes may be transient intermediates in the pathway of collaborative protein remodeling by Hsp90 and Hsp70.
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Affiliation(s)
- Anushka C Wickramaratne
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jui-Yun Liao
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Shannon M Doyle
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Joel R Hoskins
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Gabrielle Puller
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Madison L Scott
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - John Paul Alao
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA
| | - Ikponwmosa Obaseki
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA
| | - Jerry C Dinan
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Tapan K Maity
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Lisa M Jenkins
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Andrea N Kravats
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA.
| | - Sue Wickner
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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6
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Zhang R, Malinverni D, Cyr DM, Rios PDL, Nillegoda NB. J-domain protein chaperone circuits in proteostasis and disease. Trends Cell Biol 2023; 33:30-47. [PMID: 35729039 PMCID: PMC9759622 DOI: 10.1016/j.tcb.2022.05.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/13/2022] [Accepted: 05/18/2022] [Indexed: 12/27/2022]
Abstract
The J-domain proteins (JDP) form the largest protein family among cellular chaperones. In cooperation with the Hsp70 chaperone system, these co-chaperones orchestrate a plethora of distinct functions, including those that help maintain cellular proteostasis and development. JDPs evolved largely through the fusion of a J-domain with other protein subdomains. The highly conserved J-domain facilitates the binding and activation of Hsp70s. How JDPs (re)wire Hsp70 chaperone circuits and promote functional diversity remains insufficiently explained. Here, we discuss recent advances in our understanding of the JDP family with a focus on the regulation built around J-domains to ensure correct pairing and assembly of JDP-Hsp70 machineries that operate on different clientele under various cellular growth conditions.
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Affiliation(s)
- Ruobing Zhang
- Australian Regenerative Medicine Institute (ARMI), Monash University, Melbourne, Victoria, Australia
| | - Duccio Malinverni
- MRC Laboratory of Molecular Biology, Cambridge, UK; Department of Structural Biology and Center for Data Driven Discovery, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Douglas M Cyr
- Department of Cell Biology and Physiology and the Cystic Fibrosis/Pulmonary Research and Treatment Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Paolo De Los Rios
- Institute of Physics, School of Basic Sciences and Institute of Bioengineering, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Nadinath B Nillegoda
- Australian Regenerative Medicine Institute (ARMI), Monash University, Melbourne, Victoria, Australia.
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7
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Tamadaddi C, Verma AK, Zambare V, Vairagkar A, Diwan D, Sahi C. J-like protein family of Arabidopsis thaliana: the enigmatic cousins of J-domain proteins. Plant Cell Rep 2022; 41:1343-1355. [PMID: 35290497 DOI: 10.1007/s00299-022-02857-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 02/26/2022] [Indexed: 06/14/2023]
Abstract
J-like proteins (JLPs) are emerging as ancillaries to the cellular chaperone network. They modulate functions of Hsp70:J-domain protein (JDP) systems in novel ways thereby having key roles in diverse plant processes. J-domain proteins (JDPs) form an obligate co-chaperone partnership with Hsp70s with their highly conserved J-domain to steer protein quality control processes in the cell. The HPD motif between helix II and helix III of the J-domain is crucial for JDP's interaction with Hsp70s. According to the most recent classification, J-like proteins (JLPs) form an extended class of the JDP family possessing a degenerate J-domain with the HPD motif non-conservatively replaced by other amino acid residues and hence are not able to interact with Hsp70s. Considering this most updated and acceptable JLP classification, we identified 21 JLPs in Arabidopsis thaliana that share a structurally conserved J-like domain (JLD), but lack the HPD motif. Analysis of publicly available gene expression data as well as real-time quantitative PCR performed for a few selected JLPs implicated some of these proteins in growth, development and stress response. Here, we summarize the current state of knowledge on plant JLPs and their involvement in vital plant cellular/metabolic processes, including chloroplast division, mitochondrial protein import and flowering. Finally, we propose possible modes of action for these highly elusive proteins and other DnaJ-related proteins (DNAJRs) in regulating the Hsp70 chaperone network.
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Affiliation(s)
- Chetana Tamadaddi
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India
- Department of Biology, Eberly College of Science, The Pennsylvania State University, University Park, PA, USA
| | - Amit K Verma
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Vyankatesh Zambare
- School of Biotechnology and Bioinformatics, D Y Patil Deemed to be University, Navi Mumbai, India
- Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Avanti Vairagkar
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India
| | - Danish Diwan
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India
- Department of Biology, University of Alabama, Birmingham, AL, USA
| | - Chandan Sahi
- Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal, India.
- IISER Bhopal, Room Number 117, AB3, Bhopal Bypass Road, Bhopal, 462066, MP, India.
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8
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Linse S. High-Efficiency Expression and Purification of DNAJB6b Based on the pH-Modulation of Solubility and Denaturant-Modulation of Size. Molecules 2022; 27:418. [PMID: 35056736 PMCID: PMC8781954 DOI: 10.3390/molecules27020418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/31/2021] [Accepted: 01/02/2022] [Indexed: 02/05/2023] Open
Abstract
The chaperone DNAJB6b delays amyloid formation by suppressing the nucleation of amyloid fibrils and increases the solubility of amyloid-prone proteins. These dual effects on kinetics and equilibrium are related to the unusually high chemical potential of DNAJB6b in solution. As a consequence, the chaperone alone forms highly polydisperse oligomers, whereas in a mixture with an amyloid-forming protein or peptide it may form co-aggregates to gain a reduced chemical potential, thus enabling the amyloid peptide to increase its chemical potential leading to enhanced solubility of the peptide. Understanding such action at the level of molecular driving forces and detailed structures requires access to highly pure and sequence homogeneous DNAJB6b with no sequence extension. We therefore outline here an expression and purification protocol of the protein "as is" with no tags leading to very high levels of pure protein based on its physicochemical properties, including size and charge. The versatility of the protocol is demonstrated through the expression of an isotope labelled protein and seven variants, and the purification of three of these. The activity of the protein is bench-marked using aggregation assays. Two of the variants are used to produce a palette of fluorescent DNAJB6b labelled at an engineered N- or C-terminal cysteine.
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Affiliation(s)
- Sara Linse
- Department of Biochemistry and Structural Biology, Lund University, P.O. Box 124, 221 00 Lund, Sweden
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9
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Kumar J, Reidy M, Masison DC. Yeast J-protein Sis1 prevents prion toxicity by moderating depletion of prion protein. Genetics 2021; 219:iyab129. [PMID: 34849884 PMCID: PMC8633096 DOI: 10.1093/genetics/iyab129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 07/28/2021] [Indexed: 11/13/2022] Open
Abstract
[PSI+] is a prion of Saccharomyces cerevisiae Sup35, an essential ribosome release factor. In [PSI+] cells, most Sup35 is sequestered into insoluble amyloid aggregates. Despite this depletion, [PSI+] prions typically affect viability only modestly, so [PSI+] must balance sequestering Sup35 into prions with keeping enough Sup35 functional for normal growth. Sis1 is an essential J-protein regulator of Hsp70 required for the propagation of amyloid-based yeast prions. C-terminally truncated Sis1 (Sis1JGF) supports cell growth in place of wild-type Sis1. Sis1JGF also supports [PSI+] propagation, yet [PSI+] is highly toxic to cells expressing only Sis1JGF. We searched extensively for factors that mitigate the toxicity and identified only Sis1, suggesting Sis1 is uniquely needed to protect from [PSI+] toxicity. We find the C-terminal substrate-binding domain of Sis1 has a critical and transferable activity needed for the protection. In [PSI+] cells that express Sis1JGF in place of Sis1, Sup35 was less soluble and formed visibly larger prion aggregates. Exogenous expression of a truncated Sup35 that cannot incorporate into prions relieved [PSI+] toxicity. Together our data suggest that Sis1 has separable roles in propagating Sup35 prions and in moderating Sup35 aggregation that are crucial to the balance needed for the propagation of what otherwise would be lethal [PSI+] prions.
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Affiliation(s)
- Jyotsna Kumar
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0830, USA
| | - Michael Reidy
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0830, USA
| | - Daniel C Masison
- Laboratory of Biochemistry and Genetics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0830, USA
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10
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Ryder BD, Matlahov I, Bali S, Vaquer-Alicea J, van der Wel PCA, Joachimiak LA. Regulatory inter-domain interactions influence Hsp70 recruitment to the DnaJB8 chaperone. Nat Commun 2021; 12:946. [PMID: 33574241 PMCID: PMC7878476 DOI: 10.1038/s41467-021-21147-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 01/15/2021] [Indexed: 01/18/2023] Open
Abstract
The Hsp40/Hsp70 chaperone families combine versatile folding capacity with high substrate specificity, which is mainly facilitated by Hsp40s. The structure and function of many Hsp40s remain poorly understood, particularly oligomeric Hsp40s that suppress protein aggregation. Here, we used a combination of biochemical and structural approaches to shed light on the domain interactions of the Hsp40 DnaJB8, and how they may influence recruitment of partner Hsp70s. We identify an interaction between the J-Domain (JD) and C-terminal domain (CTD) of DnaJB8 that sequesters the JD surface, preventing Hsp70 interaction. We propose a model for DnaJB8-Hsp70 recruitment, whereby the JD-CTD interaction of DnaJB8 acts as a reversible switch that can control the binding of Hsp70. These findings suggest that the evolutionarily conserved CTD of DnaJB8 is a regulatory element of chaperone activity in the proteostasis network.
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Affiliation(s)
- Bryan D Ryder
- Molecular Biophysics Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Center for Alzheimer's and Neurodegenerative Diseases, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Irina Matlahov
- Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands
| | - Sofia Bali
- Molecular Biophysics Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Center for Alzheimer's and Neurodegenerative Diseases, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Jaime Vaquer-Alicea
- Center for Alzheimer's and Neurodegenerative Diseases, University of Texas Southwestern Medical Center, Dallas, TX, USA
- Neuroscience Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Patrick C A van der Wel
- Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, Netherlands.
| | - Lukasz A Joachimiak
- Center for Alzheimer's and Neurodegenerative Diseases, University of Texas Southwestern Medical Center, Dallas, TX, USA.
- Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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11
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Abstract
The misfolding and aggregation of proteins is often implicated in the development and progression of degenerative diseases. Heat shock proteins (HSPs), such as the ubiquitously expressed Type II Hsp40 molecular chaperone, DNAJB6, assist in protein folding and disaggregation. Historically, mutations within the DNAJB6 G/F domain have been associated with Limb-Girdle Muscular Dystrophy type 1D, now referred to as LGMDD1, a dominantly inherited degenerative disease. Recently, novel mutations within the J domain of DNAJB6 have been reported in patients with LGMDD1. Since novel myopathy-causing mutations in the Hsp40 J domain have yet to be characterized and both the function of DNAJB6 in skeletal muscle and the clients of this chaperone are unknown, we set out to assess the effect of these mutations on chaperone function using the genetically tractable yeast system. The essential yeast Type II Hsp40, Sis1, is homologous to DNAJB6 and is involved in the propagation of yeast prions. Using phenotypic, biochemical, and functional assays we found that homologous mutations in the Sis1 J domain differentially alter the processing of specific yeast prion strains, as well as a non-prion substrate. These data suggest that the newly-identified mutations in the J domain of DNAJB6 cause aberrant chaperone function that leads to the pathogenesis in LGMDD1.
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Affiliation(s)
- Melanie Y. Pullen
- Department of Cell Biology and Physiology, Washington University School of Medicine, St Louis, Missouri, United States of America
| | - Conrad C. Weihl
- Department of Neurology, Washington University School of Medicine, St Louis, Missouri, United States of America
| | - Heather L. True
- Department of Cell Biology and Physiology, Washington University School of Medicine, St Louis, Missouri, United States of America
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12
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Karamanos TK, Tugarinov V, Clore GM. Determining methyl sidechain conformations in a CS-ROSETTA model using methyl 1H- 13C residual dipolar couplings. J Biomol NMR 2020; 74:111-118. [PMID: 31950428 PMCID: PMC7083688 DOI: 10.1007/s10858-019-00294-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 12/17/2019] [Indexed: 05/12/2023]
Abstract
Modelling of protein structures based on backbone chemical shifts, using programs such as CS-ROSETTA, is becoming increasingly popular, especially for systems where few restraints are available or where homologous structures are already known. While the reliability of CS-ROSETTA calculations can be improved by incorporation of some additional backbone NMR data such as those afforded by residual dipolar couplings or minimal NOE data sets involving backbone amide protons, the sidechain conformations are largely modelled by statistical energy terms. Here, we present a simple method based on methyl residual dipolar couplings that can be used to determine the rotameric state of the threefold symmetry axis of methyl groups that occupy a single rotamer, determine rotameric distributions, and identify regions of high flexibility. The method is demonstrated for methyl side chains of a deletion variant of the human chaperone DNAJB6b.
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Affiliation(s)
- Theodoros K Karamanos
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA
| | - Vitali Tugarinov
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA.
| | - G Marius Clore
- Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD, 20892-0520, USA.
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13
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Bui LM, Geraldi A, Nguyen TT, Lee JH, Lee JY, Cho BK, Kim SC. mRNA Engineering for the Efficient Chaperone-Mediated Co-Translational Folding of Recombinant Proteins in Escherichia coli. Int J Mol Sci 2019; 20:ijms20133163. [PMID: 31261687 PMCID: PMC6651523 DOI: 10.3390/ijms20133163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 06/18/2019] [Accepted: 06/21/2019] [Indexed: 12/22/2022] Open
Abstract
The production of soluble, functional recombinant proteins by engineered bacterial hosts is challenging. Natural molecular chaperone systems have been used to solubilize various recombinant proteins with limited success. Here, we attempted to facilitate chaperone-mediated folding by directing the molecular chaperones to their protein substrates before the co-translational folding process completed. To achieve this, we either anchored the bacterial chaperone DnaJ to the 3ʹ untranslated region of a target mRNA by fusing with an RNA-binding domain in the chaperone-recruiting mRNA scaffold (CRAS) system, or coupled the expression of DnaJ and a target recombinant protein using the overlapping stop-start codons 5ʹ-TAATG-3ʹ between the two genes in a chaperone-substrate co-localized expression (CLEX) system. By engineering the untranslated and intergenic sequences of the mRNA transcript, bacterial molecular chaperones are spatially constrained to the location of protein translation, expressing selected aggregation-prone proteins in their functionally active, soluble form. Our mRNA engineering methods surpassed the in-vivo solubilization efficiency of the simple DnaJ chaperone co-overexpression method, thus providing more effective tools for producing soluble therapeutic proteins and enzymes.
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Affiliation(s)
- Le Minh Bui
- KAIST Institute for BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- NTT Hi-Tech Institute, Nguyen Tat Thanh University (NTTU), Ho Chi Minh City 700000, Vietnam
| | - Almando Geraldi
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Biology Department, Science and Technology Faculty, Universitas Airlangga Mulyorejo, Surabaya 60115, Indonesia
| | - Thi Thuy Nguyen
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Jun Hyoung Lee
- KAIST Institute for BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Ju Young Lee
- Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Korea
| | - Byung-Kwan Cho
- KAIST Institute for BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
- Intelligent Synthetic Biology Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
| | - Sun Chang Kim
- KAIST Institute for BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
- Intelligent Synthetic Biology Center, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.
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14
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Kim JS, Liu L, Fitzsimmons LF, Wang Y, Crawford MA, Mastrogiovanni M, Trujillo M, Till JKA, Radi R, Dai S, Vázquez-Torres A. DksA-DnaJ redox interactions provide a signal for the activation of bacterial RNA polymerase. Proc Natl Acad Sci U S A 2018; 115:E11780-E11789. [PMID: 30429329 PMCID: PMC6294903 DOI: 10.1073/pnas.1813572115] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
RNA polymerase is the only known protein partner of the transcriptional regulator DksA. Herein, we demonstrate that the chaperone DnaJ establishes direct, redox-based interactions with oxidized DksA. Cysteine residues in the zinc finger of DksA become oxidized in Salmonella exposed to low concentrations of hydrogen peroxide (H2O2). The resulting disulfide bonds unfold the globular domain of DksA, signaling high-affinity interaction of the C-terminal α-helix to DnaJ. Oxidoreductase and chaperone activities of DnaJ reduce the disulfide bonds of its client and promote productive interactions between DksA and RNA polymerase. Simultaneously, guanosine tetraphosphate (ppGpp), which is synthesized by RelA in response to low concentrations of H2O2, binds at site 2 formed at the interface of DksA and RNA polymerase and synergizes with the DksA/DnaJ redox couple, thus activating the transcription of genes involved in amino acid biosynthesis and transport. However, the high concentrations of ppGpp produced by Salmonella experiencing oxidative stress oppose DksA/DnaJ-dependent transcription. Cumulatively, the interplay of DksA, DnaJ, and ppGpp on RNA polymerase protects Salmonella from the antimicrobial activity of the NADPH phagocyte oxidase. Our research has identified redox-based signaling that activates the transcriptional activity of the RNA polymerase regulator DksA.
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Affiliation(s)
- Ju-Sim Kim
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045
| | - Lin Liu
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045
| | - Liam F Fitzsimmons
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045
| | - Yang Wang
- Department of Pharmaceutical Sciences, University of Colorado Skaags School of Pharmacy and Pharmaceutical Sciences, Aurora, CO 80045
| | - Matthew A Crawford
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045
| | - Mauricio Mastrogiovanni
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, 11800 Montevideo, Uruguay
- Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, 11800 Montevideo, Uruguay
| | - Madia Trujillo
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, 11800 Montevideo, Uruguay
- Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, 11800 Montevideo, Uruguay
| | - James Karl A Till
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045
| | - Rafael Radi
- Departamento de Bioquímica, Facultad de Medicina, Universidad de la República, 11800 Montevideo, Uruguay;
- Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, 11800 Montevideo, Uruguay
| | - Shaodong Dai
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045
- Department of Pharmaceutical Sciences, University of Colorado Skaags School of Pharmacy and Pharmaceutical Sciences, Aurora, CO 80045
| | - Andrés Vázquez-Torres
- Department of Immunology & Microbiology, University of Colorado School of Medicine, Aurora, CO 80045;
- Research Service, Veterans Affairs Eastern Colorado Health Care System, Denver, CO 80220
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15
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Pinheiro GMS, Amorim GC, Iqbal A, Ramos CHI, Almeida FCL. 1H, 15N and 13C resonance assignments of the J-domain of co-chaperone Sis1 from Saccharomyces cerevisiae. Biomol NMR Assign 2018; 12:279-281. [PMID: 29713947 DOI: 10.1007/s12104-018-9823-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 04/24/2018] [Indexed: 06/08/2023]
Abstract
Protein folding in the cell is usually aided by molecular chaperones, from which the Hsp70 (Hsp = heat shock protein) family has many important roles, such as aiding nascent folding and participating in translocation. Hsp70 has ATPase activity which is stimulated by binding to the J-domain present in co-chaperones from the Hsp40 family. Hsp40s have many functions, as for instance the binding to partially folded proteins to be delivered to Hsp70. However, the presence of the J-domain characterizes Hsp40s or, by this reason, as J-proteins. The J-domain alone can stimulate Hsp70 ATPase activity. Apparently, it also maintains the same conformation as in the whole protein although structural information on full J-proteins is still missing. This work reports the 1H, 15N and 13C resonance assignments of the J-domain of a Hsp40 from Saccharomyces cerevisiae, named Sis1. Secondary structure and order parameter prediction from chemical shifts are also reported. Altogether, the data show that Sis1 J-domain is highly structured and predominantly formed by α-helices, results that are in very good agreement with those previously reported for the crystallographic structure.
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Affiliation(s)
| | - Gisele C Amorim
- National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Numpex-Bio - Federal University of Rio de Janeiro, Duque de Caxias, RJ, Brazil
| | - Anwar Iqbal
- Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - C H I Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil.
| | - Fabio C L Almeida
- Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
- National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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16
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Rowarth NM, MacRae TH. Post-diapause synthesis of ArHsp40-2, a type 2 J-domain protein from Artemia franciscana, is developmentally regulated and induced by stress. PLoS One 2018; 13:e0201477. [PMID: 30048537 PMCID: PMC6062144 DOI: 10.1371/journal.pone.0201477] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 07/16/2018] [Indexed: 12/16/2022] Open
Abstract
Post-diapause cysts of Artemia franciscana undergo a well-defined developmental process whereby internal differentiation leads to rupture of the cyst shell, release of membrane-enclosed nauplii and hatching to yield swimming larvae. The post-diapause development of A. franciscana has been examined at biochemical and molecular levels, yet little is known about molecular chaperone function during this process. In addressing this we recently described ArHsp40, a type 1 J-domain protein in post-diapause A. franciscana cysts and larvae. The current report describes ArHsp40-2, a second J-domain protein from A. franciscana. ArHsp40-2 is a type 2 J-domain protein, lacking a zinc binding domain but containing other domains characteristic of these proteins. Notably, ArHsp40-2 possesses a double barrel β-domain structure in its substrate binding region, as does ArHsp40. qPCR revealed a relatively low amount of ArHsp40-2 mRNA in 0 h cysts which increased significantly until the E1 stage, most likely as a result of enhanced transcription, after which it declined. An antibody specific to ArHsp40-2 was produced and used to show that like its mRNA, ArHsp40-2 accumulated until the E1 stage and then decreased to amounts lower than those in 0 h cysts. The synthesis of ArHsp40-2 was induced by heat shock indicating that ArHsp40-2 is involved in stress resistance in cysts and nauplii. Accumulation in cysts during early post-diapause development followed by its sharp decline suggests a role in protein disaggregation/refolding, a function of Hsp40s from other organisms, where ArHsp40-2 assists in the rescue of proteins sequestered during diapause by p26, an abundant small heat shock protein (sHsp) in A. franciscana cysts.
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Affiliation(s)
| | - Thomas H. MacRae
- Department of Biology, Dalhousie University, Halifax, NS, Canada
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17
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Trepte P, Kruse S, Kostova S, Hoffmann S, Buntru A, Tempelmeier A, Secker C, Diez L, Schulz A, Klockmeier K, Zenkner M, Golusik S, Rau K, Schnoegl S, Garner CC, Wanker EE. LuTHy: a double-readout bioluminescence-based two-hybrid technology for quantitative mapping of protein-protein interactions in mammalian cells. Mol Syst Biol 2018; 14:e8071. [PMID: 29997244 PMCID: PMC6039870 DOI: 10.15252/msb.20178071] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 06/08/2018] [Accepted: 06/15/2018] [Indexed: 12/12/2022] Open
Abstract
Information on protein-protein interactions (PPIs) is of critical importance for studying complex biological systems and developing therapeutic strategies. Here, we present a double-readout bioluminescence-based two-hybrid technology, termed LuTHy, which provides two quantitative scores in one experimental procedure when testing binary interactions. PPIs are first monitored in cells by quantification of bioluminescence resonance energy transfer (BRET) and, following cell lysis, are again quantitatively assessed by luminescence-based co-precipitation (LuC). The double-readout procedure detects interactions with higher sensitivity than traditional single-readout methods and is broadly applicable, for example, for detecting the effects of small molecules or disease-causing mutations on PPIs. Applying LuTHy in a focused screen, we identified 42 interactions for the presynaptic chaperone CSPα, causative to adult-onset neuronal ceroid lipofuscinosis (ANCL), a progressive neurodegenerative disease. Nearly 50% of PPIs were found to be affected when studying the effect of the disease-causing missense mutations L115R and ∆L116 in CSPα with LuTHy. Our study presents a robust, sensitive research tool with high utility for investigating the molecular mechanisms by which disease-associated mutations impair protein activity in biological systems.
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Affiliation(s)
- Philipp Trepte
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Sabrina Kruse
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Simona Kostova
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Sheila Hoffmann
- Synaptopathy, German Center for Neurodegenerative Diseases, Berlin, Germany
| | - Alexander Buntru
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Anne Tempelmeier
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Christopher Secker
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
- Department of Neurology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Lisa Diez
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Aline Schulz
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Konrad Klockmeier
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Martina Zenkner
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Sabrina Golusik
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Kirstin Rau
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Sigrid Schnoegl
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
| | - Craig C Garner
- Synaptopathy, German Center for Neurodegenerative Diseases, Berlin, Germany
| | - Erich E Wanker
- Neuroproteomics, Max Delbrück Center for Molecular Medicine and Berlin Institute of Health, Berlin, Germany
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18
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Affiliation(s)
- Andrea N. Killian
- Department of Chemistry, Lafayette College, Easton, Pennsylvania, United States of America
| | - Justin K. Hines
- Department of Chemistry, Lafayette College, Easton, Pennsylvania, United States of America
- * E-mail:
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19
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Abstract
Classical DNAJ proteins are co-chaperones that together with HSP70s control protein homeostasis. All three classical types of DNAJ proteins (DNAJA, DNAJB and DNAJC types) possess the J-domain for interaction with HSP70. DNAJA proteins contain, in addition, both the zinc-finger motif and the C-terminal domain which are involved in substrate binding, while DNAJB retains only the latter and DNAJC comprises only the J-domain. There is increasing evidence that some of the activities of DNAJ proteins do not require the J-domain, highlighting the functional significance of the other two domains. Indeed, the so-called DNAJ-like proteins with a degenerate J-domain have been previously coined as DNAJD proteins, and also proteins containing only a DNAJ-like zinc-finger motif appear to be involved in protein homeostasis. Therefore, we propose to extend the classification of DNAJ-related proteins into three different groups. The DNAJD type comprises proteins with a J-like domain only, and has 15 members in Arabidopsis thaliana, whereas proteins of the DNAJE (33 Arabidopsis members) and DNAJF (three Arabidopsis members) types contain a DNAJA-like zinc-finger domain and DNAJA/B-like C-terminal domain, respectively. Here, we provide an overview of the entire repertoire of these proteins in A. thaliana with respect to their physiological function and possible evolutionary origin.
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Affiliation(s)
- Pablo Pulido
- Plant Molecular Biology, Department Biology I, Ludwig-Maximilians-Universität München, D-82152, Planegg-Martinsried, Germany
- Copenhagen Plant Science Centre, University of Copenhagen, 1871, Frederiksberg C, Denmark
| | - Dario Leister
- Plant Molecular Biology, Department Biology I, Ludwig-Maximilians-Universität München, D-82152, Planegg-Martinsried, Germany
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20
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Budzyński MA, Crul T, Himanen SV, Toth N, Otvos F, Sistonen L, Vigh L. Chaperone co-inducer BGP-15 inhibits histone deacetylases and enhances the heat shock response through increased chromatin accessibility. Cell Stress Chaperones 2017; 22:717-728. [PMID: 28474205 PMCID: PMC5573690 DOI: 10.1007/s12192-017-0798-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/22/2017] [Accepted: 04/07/2017] [Indexed: 01/20/2023] Open
Abstract
Defects in cellular protein homeostasis are associated with many severe and prevalent pathological conditions such as neurodegenerative diseases, muscle dystrophies, and metabolic disorders. One way to counteract these defects is to improve the protein homeostasis capacity through induction of the heat shock response. Despite numerous attempts to develop strategies for chemical activation of the heat shock response by heat shock transcription factor 1 (HSF1), the underlying mechanisms of drug candidates' mode of action are poorly understood. To lower the threshold for the heat shock response activation, we used the chaperone co-inducer BGP-15 that was previously shown to have beneficial effects on several proteinopathic disease models. We found that BGP-15 treatment combined with heat stress caused a substantial increase in HSF1-dependent heat shock protein 70 (HSPA1A/B) expression already at a febrile range of temperatures. Moreover, BGP-15 alone inhibited the activity of histone deacetylases (HDACs), thereby increasing chromatin accessibility at multiple genomic loci including the stress-inducible HSPA1A. Intriguingly, treatment with well-known potent HDAC inhibitors trichostatin A and valproic acid enhanced the heat shock response and improved cytoprotection. These results present a new pharmacological strategy for restoring protein homeostasis by inhibiting HDACs, increasing chromatin accessibility, and lowering the threshold for heat shock response activation.
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Affiliation(s)
- Marek A Budzyński
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, FI-20520, Turku, Finland
- Turku Centre for Biotechnology, Åbo Akademi University and University of Turku, FI-20520, Turku, Finland
| | - Tim Crul
- Biological Research Centre of the Hungarian Academy of Sciences, Szeged, 6726, Hungary
| | - Samu V Himanen
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, FI-20520, Turku, Finland
- Turku Centre for Biotechnology, Åbo Akademi University and University of Turku, FI-20520, Turku, Finland
| | - Noemi Toth
- Biological Research Centre of the Hungarian Academy of Sciences, Szeged, 6726, Hungary
| | - Ferenc Otvos
- Biological Research Centre of the Hungarian Academy of Sciences, Szeged, 6726, Hungary
| | - Lea Sistonen
- Faculty of Science and Engineering, Cell Biology, Åbo Akademi University, FI-20520, Turku, Finland.
- Turku Centre for Biotechnology, Åbo Akademi University and University of Turku, FI-20520, Turku, Finland.
| | - Laszlo Vigh
- Biological Research Centre of the Hungarian Academy of Sciences, Szeged, 6726, Hungary.
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21
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Dobriyal N, Tripathi P, Sarkar S, Tak Y, Verma AK, Sahi C. Partial dispensability of Djp1's J domain in peroxisomal protein import in Saccharomyces cerevisiae results from genetic redundancy with another class II J protein, Caj1. Cell Stress Chaperones 2017; 22:445-452. [PMID: 28261750 PMCID: PMC5425370 DOI: 10.1007/s12192-017-0779-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 02/08/2017] [Accepted: 02/16/2017] [Indexed: 01/17/2023] Open
Abstract
J proteins are obligate co-chaperones of Hsp70s. Via their signature J domain, all J proteins interact with their partner Hsp70s and stimulate their weak ATPase activity, which is vital for Hsp70 functions. The dependency of J proteins on their J domain is such that mutations in critical amino acids in the J domain often results into a null phenotype for a particular J protein. Here, we show that the J domain of Djp1, a cytosolic J protein important for peroxisomal protein import in Saccharomyces cerevisiae, is partially dispensable. A complete deletion of Djp1 J domain resulted into only partial loss in peroxisomal protein import function. Instead, the C-terminal domain of Djp1 was found to be essential for proper localization of the peroxisomal targeted GFP-PTS1. Furthermore, we show that Caj1, another cytosolic J protein, also has some role in peroxisomal protein import. Caj1 was found to be partially redundant with Djp1 as cells lacking both Djp1 and Caj1 resulted into a much more severe defect in GFP-PTS1 localization. Based on these results, we propose that dispensability of J domains could be attributed to genetic redundancy between different J proteins sharing common structural topology and cellular localization.
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Affiliation(s)
- Neha Dobriyal
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Prerna Tripathi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Susrita Sarkar
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
- Department of Biology, Boston University, Boston, MA, 02215, USA
| | - Yogesh Tak
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Amit K Verma
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Chandan Sahi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India.
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22
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Zagari N, Sandoval-Ibañez O, Sandal N, Su J, Rodriguez-Concepcion M, Stougaard J, Pribil M, Leister D, Pulido P. SNOWY COTYLEDON 2 Promotes Chloroplast Development and Has a Role in Leaf Variegation in Both Lotus japonicus and Arabidopsis thaliana. Mol Plant 2017; 10:721-734. [PMID: 28286296 DOI: 10.1016/j.molp.2017.02.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 02/17/2017] [Accepted: 02/26/2017] [Indexed: 05/20/2023]
Abstract
Plants contain various factors that transiently interact with subunits or intermediates of the thylakoid multiprotein complexes, promoting their stable association and integration. Hence, assembly factors are essential for chloroplast development and the transition from heterotrophic to phototrophic growth. Snowy cotyledon 2 (SCO2) is a DNAJ-like protein involved in thylakoid membrane biogenesis and interacts with the light-harvesting chlorophyll-binding protein LHCB1. In Arabidopsis thaliana, SCO2 function was previously reported to be restricted to cotyledons. Here we show that disruption of SCO2 in Lotus japonicus results not only in paler cotyledons but also in variegated true leaves. Furthermore, smaller and pale-green true leaves can also be observed in A. thaliana sco2 (atsco2) mutants under short-day conditions. In both species, SCO2 is required for proper accumulation of PSII-LHCII complexes. In contrast to other variegated mutants, inhibition of chloroplastic translation strongly affects L. japonicus sco2 mutant development and fails to suppress their variegated phenotype. Moreover, inactivation of the suppressor of variegation AtClpR1 in the atsco2 background results in an additive double-mutant phenotype with variegated true leaves. Taken together, our results indicate that SCO2 plays a distinct role in PSII assembly or repair and constitutes a novel factor involved in leaf variegation.
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Affiliation(s)
- Nicola Zagari
- Plant Molecular Biology, Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany; Copenhagen Plant Science Center, University of Copenhagen, 1871 Frederiksberg C, Denmark; Research and Innovation Center, Fondazione Edmund Mach, via E. Mach 1, 38010 San Michele all'Adige, Italy
| | - Omar Sandoval-Ibañez
- Copenhagen Plant Science Center, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Niels Sandal
- Centre for Carbohydrate Recognition and Signalling, Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
| | - Junyi Su
- Centre for Carbohydrate Recognition and Signalling, Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
| | - Manuel Rodriguez-Concepcion
- Centre for Research in Agricultural Genomics (CRAG) CSIC-IRTA-UAB-UB, Campus UAB Bellaterra, 08193 Barcelona, Spain
| | - Jens Stougaard
- Centre for Carbohydrate Recognition and Signalling, Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus C, Denmark
| | - Mathias Pribil
- Copenhagen Plant Science Center, University of Copenhagen, 1871 Frederiksberg C, Denmark
| | - Dario Leister
- Plant Molecular Biology, Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany; Copenhagen Plant Science Center, University of Copenhagen, 1871 Frederiksberg C, Denmark.
| | - Pablo Pulido
- Plant Molecular Biology, Department of Biology I, Ludwig-Maximilians-Universität München, 82152 Planegg-Martinsried, Germany; Copenhagen Plant Science Center, University of Copenhagen, 1871 Frederiksberg C, Denmark
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Liu Q, Li H, Yang Y, Tian X, Su J, Zhou L, Liu Q. A disulfide-bonded DnaK dimer is maintained in an ATP-bound state. Cell Stress Chaperones 2017; 22:201-212. [PMID: 27975204 PMCID: PMC5352592 DOI: 10.1007/s12192-016-0752-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 11/16/2016] [Accepted: 11/28/2016] [Indexed: 01/16/2023] Open
Abstract
DnaK, a major Hsp70 molecular chaperones in Escherichia coli, is a widely used model for studying Hsp70s. We recently solved a crystal structure of DnaK in complex with ATP and showed that DnaK was packed as a dimer in the crystal structure. Our previous biochemical studies supported the formation of a specific DnaK dimer as observed in the crystal structure in solution in the presence of ATP and suggested an important role of this dimer in efficient interaction with Hsp40 co-chaperones. In this study, we dissected the biochemical properties of this DnaK dimer. To restrict DnaK in this dimer form, we mutated two residues on the dimer interface to cysteine, A303C, and H541C. Upon oxidation, this DnaK-A303C-H541C protein formed a specific dimer linked by disulfide bonds formed between A303C and H541C only in the presence of ATP, consistent with the crystal structure. Intriguingly, this disulfide-bond-linked dimer of DnaK-A303C-H541C has reduced ATPase activity and decreased affinity for peptide substrate. More interestingly, unlike wild-type DnaK, the peptide substrate-binding kinetics of this dimer is drastically accelerated even in the absence of ATP, suggesting this dimer is restricted in an ATP-bound conformation regardless of nucleotide bound, which was further supported by our analysis using tryptophan fluorescence and ATP-induced peptide release. Thus, formation of the dimer restricted DnaK in an ATP-bound state and blocked the progression through the chaperone cycle. Productive progression through the chaperone cycle requires the dissociation of this transient dimer. Surprisingly, a significantly compromised interaction with Hsp40 co-chaperone was observed for this disulfide-bond-linked dimer. Thus, dissociation of this DnaK dimer is equally crucial for efficient Hsp40 interaction. An initial interaction between Hsp70 and Hsp40 requires the formation of DnaK dimer; but a stable Hsp70-Hsp40 interaction may follow the dissociation of the dimer.
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Affiliation(s)
- Qingdai Liu
- Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Ministry of Education, Tianjin, 300457, China.
| | - Hongtao Li
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Ying Yang
- Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Ministry of Education, Tianjin, 300457, China
| | - Xueli Tian
- Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Ministry of Education, Tianjin, 300457, China
| | - Jiayue Su
- Key Laboratory of Food Nutrition and Safety, Tianjin University of Science and Technology, Ministry of Education, Tianjin, 300457, China
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Lei Zhou
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Qinglian Liu
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, 23298, USA.
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Deane CAS, Brown IR. Components of a mammalian protein disaggregation/refolding machine are targeted to nuclear speckles following thermal stress in differentiated human neuronal cells. Cell Stress Chaperones 2017; 22:191-200. [PMID: 27966060 PMCID: PMC5352593 DOI: 10.1007/s12192-016-0753-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 11/25/2016] [Accepted: 11/25/2016] [Indexed: 01/19/2023] Open
Abstract
Heat shock proteins (Hsps) are a set of highly conserved proteins involved in cellular repair and protective mechanisms. They counter protein misfolding and aggregation that are characteristic features of neurodegenerative diseases. Hsps act co-operatively in disaggregation/refolding machines that assemble at sites of protein misfolding and aggregation. Members of the DNAJ (Hsp40) family act as "holdases" that detect and bind misfolded proteins, while members of the HSPA (Hsp70) family act as "foldases" that refold proteins to biologically active states. HSPH1 (Hsp105α) is an important additional member of the mammalian disaggregation/refolding machine that acts as a disaggregase to promote the dissociation of aggregated proteins. Components of a disaggregation/refolding machine were targeted to nuclear speckles after thermal stress in differentiated human neuronal SH-SY5Y cells, namely: HSPA1A (Hsp70-1), DNAJB1 (Hsp40-1), DNAJA1 (Hsp40-4), and HSPH1 (Hsp105α). Nuclear speckles are rich in RNA splicing factors, and heat shock disrupts RNA splicing which recovers after stressful stimuli. Interestingly, constitutively expressed HSPA8 (Hsc70) was also targeted to nuclear speckles after heat shock with elements of a disaggregation/refolding machine. Hence, neurons have the potential to rapidly assemble a disaggregation/refolding machine after cellular stress using constitutively expressed Hsc70 without the time lag needed for synthesis of stress-inducible Hsp70. Constitutive Hsc70 is abundant in neurons in the mammalian brain and has been proposed to play a role in pre-protecting neurons from cellular stress.
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Affiliation(s)
- Catherine A S Deane
- Centre for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
| | - Ian R Brown
- Centre for the Neurobiology of Stress, Department of Biological Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada.
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25
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Sun TH, Zhou F, Liu CJ, Zhuang Z, Lu S. The DnaJ-like zinc finger domain protein ORANGE localizes to the nucleus in etiolated cotyledons of Arabidopsis thaliana. Protoplasma 2016; 253:1599-1604. [PMID: 26634929 DOI: 10.1007/s00709-015-0919-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Accepted: 11/25/2015] [Indexed: 05/26/2023]
Abstract
Vitamin A deficiency (VAD) is a worldwide health problem. Overexpression of the DnaJ-like zinc finger domain protein ORANGE (OR) is a novel strategy for the biofortification of pro-vitamin A carotenoids in different staple crops to alleviate VAD. In plants, OR triggers the differentiation from non-pigmented plastids into carotenoid-accumulating plastids. There are different reports on the subcellular localization of this protein in either chloroplasts or the nucleus, both of which were supported by confocal observation and protein-protein interaction results. In this work, we studied the subcellular localization of OR in the cotyledons of germinating seedlings whose plastids were transitioning from non-pigmented proplastids into carotenoid-accumulating etioplasts in the dark, and then into chloroplasts upon illumination. Our Western blot analysis identified two bands of the Arabidopsis OR protein (AtOR) from the chloroplast fraction of the mature leaves (i.e., a 34-kDa form corresponding to the full-length peptide and a 30-kDa form suggesting the removal of the N-terminal chloroplast transit peptide). We found that the full-length AtOR was predominantly localized in the nucleus in etiolated cotyledons, although its abundance decreased upon illumination. Our bioinformatics analysis indicated a nuclear localization signal (NLS) after the N-terminal chloroplast transit peptide. When we substituted different N-terminal regions of AtOR with the green fluorescent protein, our confocal observations demonstrated that this NLS was sufficient to target AtOR to the nucleus. Our results demonstrate that AtOR is a dual-targeted protein that mainly localizes in the nucleus in etiolated cotyledons.
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Affiliation(s)
- Tian-Hu Sun
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Fei Zhou
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Chuan-Jun Liu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Zhong Zhuang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210023, China
| | - Shan Lu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, 210023, China.
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26
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Behnke J, Mann MJ, Scruggs FL, Feige MJ, Hendershot LM. Members of the Hsp70 Family Recognize Distinct Types of Sequences to Execute ER Quality Control. Mol Cell 2016; 63:739-52. [PMID: 27546788 DOI: 10.1016/j.molcel.2016.07.012] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/27/2016] [Accepted: 07/15/2016] [Indexed: 02/02/2023]
Abstract
Protein maturation in the endoplasmic reticulum is controlled by multiple chaperones, but how they recognize and determine the fate of their clients remains unclear. We developed an in vivo peptide library covering substrates of the ER Hsp70 system: BiP, Grp170, and three of BiP's DnaJ-family co-factors (ERdj3, ERdj4, and ERdj5). In vivo binding studies revealed that sites for pro-folding chaperones BiP and ERdj3 were frequent and dispersed throughout the clients, whereas Grp170, ERdj4, and ERdj5 specifically recognized a distinct type of rarer sequence with a high predicted aggregation potential. Mutational analyses provided insights into sequence recognition characteristics for these pro-degradation chaperones, which could be readily introduced or disrupted, allowing the consequences for client fates to be determined. Our data reveal unanticipated diversity in recognition sequences for chaperones; establish a sequence-encoded interplay between protein folding, aggregation, and degradation; and highlight the ability of clients to co-evolve with chaperones, ensuring quality control.
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Affiliation(s)
- Julia Behnke
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Melissa J Mann
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Fei-Lin Scruggs
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA; Department of Chemistry, Rhodes College, 2000 N. Parkway, Memphis, TN 38112, USA
| | - Matthias J Feige
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA; Center for Integrated Protein Science at the Department of Chemistry and Institute for Advanced Study, Technische Universität München, Lichtenbergstr. 4, 85748 Garching, Germany.
| | - Linda M Hendershot
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA.
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27
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Abstract
Heat shock proteins of 40 kDa (Hsp40s), also called J proteins, are obligate partners of Hsp70s. Via their highly conserved and functionally critical J domain, J proteins interact and modulate the activity of their Hsp70 partners. Mutations in the critical residues in the J domain often result in the null phenotype for the J protein in question. However, as more J proteins have been characterized, it is becoming increasingly clear that a significant number of J proteins do not "completely" rely on their J domains to carry out their cellular functions, as previously thought. In some cases, regions outside the highly conserved J domain have become more important making the J domain dispensable for some, if not for all functions of a J protein. This has profound effects on the evolution of such J proteins. Here we present selected examples of J proteins that perform J domain independent functions and discuss this in the context of evolution of J proteins with dispensable J domains and J-like proteins in eukaryotes.
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Affiliation(s)
- Chetana Ajit Tamadaddi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Chandan Sahi
- Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India.
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28
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Daniyan MO, Boshoff A, Prinsloo E, Pesce ER, Blatch GL. The Malarial Exported PFA0660w Is an Hsp40 Co-Chaperone of PfHsp70-x. PLoS One 2016; 11:e0148517. [PMID: 26845441 PMCID: PMC4742251 DOI: 10.1371/journal.pone.0148517] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Accepted: 01/19/2016] [Indexed: 11/18/2022] Open
Abstract
Plasmodium falciparum, the human pathogen responsible for the most dangerous malaria infection, survives and develops in mature erythrocytes through the export of proteins needed for remodelling of the host cell. Molecular chaperones of the heat shock protein (Hsp) family are prominent members of the exportome, including a number of Hsp40s and a Hsp70. PFA0660w, a type II Hsp40, has been shown to be exported and possibly form a complex with PfHsp70-x in the infected erythrocyte cytosol. However, the chaperone properties of PFA0660w and its interaction with human and parasite Hsp70s are yet to be investigated. Recombinant PFA0660w was found to exist as a monomer in solution, and was able to significantly stimulate the ATPase activity of PfHsp70-x but not that of a second plasmodial Hsp70 (PfHsp70-1) or a human Hsp70 (HSPA1A), indicating a potential specific functional partnership with PfHsp70-x. Protein binding studies in the presence and absence of ATP suggested that the interaction of PFA0660w with PfHsp70-x most likely represented a co-chaperone/chaperone interaction. Also, PFA0660w alone produced a concentration-dependent suppression of rhodanese aggregation, demonstrating its chaperone properties. Overall, we have provided the first biochemical evidence for the possible role of PFA0660w as a chaperone and as co-chaperone of PfHsp70-x. We propose that these chaperones boost the chaperone power of the infected erythrocyte, enabling successful protein trafficking and folding, and thereby making a fundamental contribution to the pathology of malaria.
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Affiliation(s)
- Michael O. Daniyan
- Biomedical Biotechnology Research Unit, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, South Africa
- Department of Pharmacology, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Aileen Boshoff
- Biotechnology Innovation Centre, Rhodes University, Grahamstown, South Africa
| | - Earl Prinsloo
- Biotechnology Innovation Centre, Rhodes University, Grahamstown, South Africa
| | - Eva-Rachele Pesce
- Biomedical Biotechnology Research Unit, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, South Africa
- College of Health and Biomedicine, Victoria University, Melbourne, Victoria, Australia
- * E-mail: (GLB); (E-RP)
| | - Gregory L. Blatch
- Biomedical Biotechnology Research Unit, Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, South Africa
- College of Health and Biomedicine, Victoria University, Melbourne, Victoria, Australia
- * E-mail: (GLB); (E-RP)
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29
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Yuan H, Owsiany K, Sheeja TE, Zhou X, Rodriguez C, Li Y, Welsch R, Chayut N, Yang Y, Thannhauser TW, Parthasarathy MV, Xu Q, Deng X, Fei Z, Schaffer A, Katzir N, Burger J, Tadmor Y, Li L. A Single Amino Acid Substitution in an ORANGE Protein Promotes Carotenoid Overaccumulation in Arabidopsis. Plant Physiol 2015; 169:421-31. [PMID: 26224804 PMCID: PMC4577434 DOI: 10.1104/pp.15.00971] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 07/27/2015] [Indexed: 05/19/2023]
Abstract
Carotenoids are crucial for plant growth and human health. The finding of ORANGE (OR) protein as a pivotal regulator of carotenogenesis offers a unique opportunity to comprehensively understand the regulatory mechanisms of carotenoid accumulation and develop crops with enhanced nutritional quality. Here, we demonstrated that alteration of a single amino acid in a wild-type OR greatly enhanced its ability to promote carotenoid accumulation. Whereas overexpression of OR from Arabidopsis (Arabidopsis thaliana; AtOR) or from the agronomically important crop sorghum (Sorghum bicolor; SbOR) increased carotenoid levels up to 2-fold, expression of AtOR(His) (R90H) or SbOR(His) (R104H) variants dramatically enhanced carotenoid accumulation by up to 7-fold in the Arabidopsis calli. Moreover, we found that AtOR(Ala) (R90A) functioned similarly to AtOR(His) to promote carotenoid overproduction. Neither AtOR nor AtOR(His) greatly affected carotenogenic gene expression. AtOR(His) exhibited similar interactions with phytoene synthase (PSY) as AtOR in posttranscriptionally regulating PSY protein abundance. AtOR(His) triggered biogenesis of membranous chromoplasts in the Arabidopsis calli, which shared structures similar to chromoplasts found in the curd of the orange cauliflower (Brassica oleracea) mutant. By contrast, AtOR did not cause plastid-type changes in comparison with the controls, but produced plastids containing larger and electron-dense plastoglobuli. The unique ability of AtOR(His) in mediating chromoplast biogenesis is responsible for its induced carotenoid overproduction. Our study demonstrates OR(His/Ala) as powerful tools for carotenoid enrichment in plants, and provides insights into the mechanisms underlying OR(His)-regulated carotenoid accumulation.
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Affiliation(s)
- Hui Yuan
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Katherine Owsiany
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - T E Sheeja
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Xiangjun Zhou
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Caroline Rodriguez
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Yongxi Li
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Ralf Welsch
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Noam Chayut
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Yong Yang
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Theodore W Thannhauser
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Mandayam V Parthasarathy
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Qiang Xu
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Xiuxin Deng
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Zhangjun Fei
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Ari Schaffer
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Nurit Katzir
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Joseph Burger
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Yaakov Tadmor
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
| | - Li Li
- Robert W. Holley Center for Agriculture and Health, U.S. Department of Agriculture-Agricultural Research Service (H.Y., X.Z., Y.Y., T.W.T., L.L.), Plant Breeding and Genetics Section, School of Integrative Plant Science (H.Y., K.O., T.E.S., X.Z., C.R., L.L.), Plant Biology Section, School of Integrative Plant Science (M.V.P.), and Boyce Thompson Institute for Plant Research (Z.F.), Cornell University, Ithaca, New York 14853;Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, People's Republic of China (Y.L., Q.X., X.D.);University of Freiburg, Faculty of Biology II, D79104 Freiburg, Germany (R.W.); andNewe Ya'ar Research Center, Agricultural Research Organization, Ramat Yishay 30095, Israel (N.C., A.S., N.K., J.B., Y.T.)
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Yu HY, Ziegelhoffer T, Craig EA. Functionality of Class A and Class B J-protein co-chaperones with Hsp70. FEBS Lett 2015; 589:2825-30. [PMID: 26247431 DOI: 10.1016/j.febslet.2015.07.040] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 07/20/2015] [Accepted: 07/22/2015] [Indexed: 11/19/2022]
Abstract
At their C-termini, cytosolic Hsp70s have an EEVD tetrapeptide that interacts with J-protein co-chaperones of the B, but not A, class. This interaction is required for partnering with yeast B-type J-proteins in protein folding. Here we report conservation of this feature. Human B-type J-proteins also have a stringent EEVD requirement. Human A-type J-proteins function less well than their yeast orthologs with Hsp70ΔEEVD. Changes in the zinc binding domain, a domain absent in B-type J-proteins, overcomes this partial EEVD dependence. Our results suggest that the structurally similar A- and B-class J-proteins of the cytosol have evolved conserved, yet distinct, features that enhance specialized functionality of Hsp70 machinery.
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Affiliation(s)
- Hyun Young Yu
- Department of Biochemistry, 433 Babcock Drive, University of Wisconsin - Madison, Madison, WI 53706, USA
| | - Thomas Ziegelhoffer
- Department of Biochemistry, 433 Babcock Drive, University of Wisconsin - Madison, Madison, WI 53706, USA
| | - Elizabeth A Craig
- Department of Biochemistry, 433 Babcock Drive, University of Wisconsin - Madison, Madison, WI 53706, USA.
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31
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Ma ZX, Leng YJ, Chen GX, Zhou PM, Ye D, Chen LQ. The THERMOSENSITIVE MALE STERILE 1 Interacts with the BiPs via DnaJ Domain and Stimulates Their ATPase Enzyme Activities in Arabidopsis. PLoS One 2015; 10:e0132500. [PMID: 26186593 PMCID: PMC4505944 DOI: 10.1371/journal.pone.0132500] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/15/2015] [Indexed: 11/20/2022] Open
Abstract
The Arabidopsis TMS1 encodes a heat shock protein identical to the Hsp40 protein AtERdj3A and plays important roles in the thermotolerance of pollen tubes and other plant tissues. Despite its importance to plant growth and reproduction, little has been known about its mechanisms underlying thermotolerance of plants. In this study, the relationship between TMS1 and the Hsp70 proteins, Binding Immunoglobulin Proteins (BiPs) was explored to understand the molecular mechanisms of TMS1 in thermotolerance of plants. The expression of TMS1 was induced not only by heat shock, but also by dithiothreitol (DTT) and L-azetidine-2-carboxylic acid (AZC), similarly to the three BiP genes, indicating that TMS1 may be involved in unfolded protein response (UPR). The firefly luciferase complementary imaging (LCI), GST pull-down and ATPase enzyme activity assays demonstrated that the DnaJ domain of TMS1 could interact with BiP1 and BiP3, and could stimulate their ATPase enzyme activities. In addition, the expression level of TMS1 was reduced in the bzip28 bzip60 double mutant. These results suggest that TMS1 may function at the downstream of bZIP28 and bZIP60 and be involved in termotolerance of plants, possibly by participating in refolding or degradation of unfolded and misfolded proteins through interaction with the BiPs.
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Affiliation(s)
- Zhao-Xia Ma
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Ya-Jun Leng
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Guang-Xia Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Peng-Min Zhou
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
| | - De Ye
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
- National Center for Plant Gene Research (Beijing), Beijing, China
| | - Li-Qun Chen
- State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing, China
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Wu Y, Gao S, Ma F, Cui J, Yao H, Sun X, Wang J, Xu W. [Pneumococcal HSP40 induces the immune response in mouse macrophages via p38MAPK and JNK signaling pathways]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2015; 31:730-735. [PMID: 26062411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To investigate the mechanism of immune response in mouse macrophage induced by Pneumococcal heat shock protein 40 (HSP40). METHODS After recombinant HSP40 (rHSP40) underwent expression detection and purification, lipopolysaccharide (LPS) was removed from it. Then rHSP40 was used to stimulate bone marrow derived macrophages (BMDMs) derived from C57BL/6 wild-type mice. The mRNA levels of tumor necrosis factor α (TNF-α), interleukin 6 (IL-6), IL-1β, IL-23p19, IL-12p40, IL-12p35 and IL-10 in BMDMs were determined by reverse transcription PCR; the expressions of TNF-α, IL-6 and IL-12p40 were measured by ELISA. After stimulated by rHSP40, the levels of TNF-α and IL-6 expressed by wide-type, TLR2-/- and TLR4-/- BMDMs were detected by ELISA. The effects of the pretreatment of mitogen-activated protein kinases (MAPK) inhibitors on the secretion of TNF-α and IL-6 induced by rHSP40 were also evaluated by ELISA in BMDMs. The phosphorylation levels of p38MAPK and c-Jun N-terminal kinase (JNK) were determined by Western blotting. RESULTS The rHSP40 protein reached a purity of more than 90%. It significantly enhanced the phosphorylation levels of p38MAPK and JNK as well as the expressions of TNF-α and IL-6. The p38MAPK and JNK inhibitors significantly suppressed the expressions of TNF-α and IL-6. The expressions of TNF-α and IL-6 in TLR4-/- BMDMs significantly decreased compared with wide-type BMDMs. CONCLUSION HSP40-induced immune response of mouse macrophages is regulated by p38MAPK and JNK signaling pathways, and this induction process depends on TLR4.
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Affiliation(s)
- Yingying Wu
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Song Gao
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Feng Ma
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Jingjing Cui
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Hua Yao
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Xiaoyu Sun
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Jichao Wang
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Wenchun Xu
- Ministry of Education Key Laboratory of Medical Diagnostics, Department of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
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Abstract
Cysteine string protein (CSP) is a member of the DnaJ/Hsp40 family of co-chaperones that localises to neuronal synaptic vesicles. Its name derives from the possession of a string of 12–15 cysteine residues, palmitoylation of which is required for targeting to post-Golgi membranes. The DnaJ domain of CSP enables it to bind client proteins and recruit Hsc70 chaperones, thereby contributing to the maintenance of protein folding in the presynaptic compartment. Mutation of CSP in flies, worms and mice reduces lifespan and causes synaptic dysfunction and neurodegeneration. Furthermore, recent studies have revealed that the neurodegenerative disease, adult onset neuronal ceroid lipofuscinosis, is caused by mutations in the human CSPα-encoding DNAJC5 gene. Accumulating evidence suggests that the major mechanism by which CSP prevents neurodegeneration is by maintaining the conformation of SNAP-25, thereby facilitating its entry into the membrane-fusing SNARE complex. In this review, we focus on the role of CSP in preventing neurodegeneration and discuss how recent studies of this universal neuroprotective chaperone are being translated into potential novel therapeutics for neurodegenerative diseases.
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Affiliation(s)
- Robert D Burgoyne
- Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Crown St., Liverpool L69 3BX, UK
| | - Alan Morgan
- Department of Cellular and Molecular Physiology, Institute of Translational Medicine, University of Liverpool, Crown St., Liverpool L69 3BX, UK.
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Abstract
Cellular homeostasis and stress survival requires maintenance of the proteome and suppression of proteotoxicity. Molecular chaperones promote cell survival through repair of misfolded proteins and cooperation with protein degradation machines to discard terminally damaged proteins. Hsp70 family members play an essential role in cellular protein metabolism by binding and releasing nonnative proteins to facilitate protein folding, refolding and degradation. Hsp40 family members are Hsp70 co-chaperones that determine the fate of Hsp70 clients by facilitating protein folding, assembly, and degradation. Hsp40s select substrates for Hsp70 via use of an intrinsic chaperone activity to bind non-native regions of proteins. During delivery of bound cargo Hsp40s employ a conserved J-domain to stimulate Hsp70 ATPase activity and thereby stabilize complexes between Hsp70 and non-native proteins. Type I and Type II Hsp40s direct Hsp70 to preform multiple functions in protein homeostasis. This review describes the mechanisms by which Type I and Type II sub-types of Hsp40 bind and deliver substrates to Hsp70.
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Affiliation(s)
- Douglas M Cyr
- Department of Cell Biology and Physiology, School of Medicine, University of North Carolina, 27599, Chapel Hill, NC, USA,
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Sirigineedi S, Vijayagowri E, Murthy GN, Rao G, Ponnuvel KM. Molecular characterization of DnaJ 5 homologs in silkworm Bombyx mori and its expression during egg diapause. Insect Sci 2014; 21:677-686. [PMID: 23956244 DOI: 10.1111/1744-7917.12048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/08/2013] [Indexed: 06/02/2023]
Abstract
A comparison of the cDNA sequences (1 056 bp) of Bombyx mori DnaJ 5 homolog with B. mori genome revealed that unlike in other Hsps, it has an intron of 234 bp. The DnaJ 5 homolog contains 351 amino acids, of which 70 contain the conserved DnaJ domain at the N-terminal end. This homolog of B. mori has all desirable functional domains similar to other insects, and the 13 different DnaJ homologs identified in B. mori genome were distributed on different chromosomes. The expressed sequence tag database analysis of Hsp40 gene expression revealed higher expression in wing disc followed by diapause-induced eggs. Microarray analysis revealed higher expression of DnaJ 5 homolog at 18th h after oviposition in diapause-induced eggs. Further validation of DnaJ 5 expression through qPCR in diapause-induced and nondiapause eggs at different time intervals revealed higher expression in diapause eggs at 18 and 24 h after oviposition, which coincided with the expression of Hsp70 as the Hsp 40 is its co-chaperone. This study thus provides an outline of the genome organization of Hsp40 gene, and its role in egg diapause induction in B. mori.
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Affiliation(s)
- Sasibhushan Sirigineedi
- Genomics Division, Seribiotech Research Laboratory, Carmelaram Post, Kodathi, Bangalore, 560035, Karnataka, India
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Månsson C, Kakkar V, Monsellier E, Sourigues Y, Härmark J, Kampinga HH, Melki R, Emanuelsson C. DNAJB6 is a peptide-binding chaperone which can suppress amyloid fibrillation of polyglutamine peptides at substoichiometric molar ratios. Cell Stress Chaperones 2014; 19:227-39. [PMID: 23904097 PMCID: PMC3933622 DOI: 10.1007/s12192-013-0448-5] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/10/2013] [Accepted: 07/11/2013] [Indexed: 01/17/2023] Open
Abstract
Expanded polyglutamine (polyQ) stretches lead to protein aggregation and severe neurodegenerative diseases. A highly efficient suppressor of polyQ aggregation was identified, the DNAJB6, when molecular chaperones from the HSPH, HSPA, and DNAJ families were screened for huntingtin exon 1 aggregation in cells (Hageman et al. in Mol Cell 37(3):355-369, 2010). Furthermore, also aggregation of polyQ peptides expressed in cells was recently found to be efficiently suppressed by co-expression of DNAJB6 (Gillis et al. in J Biol Chem 288:17225-17237, 2013). These suppression effects can be due to an indirect effect of DNAJB6 on other cellular components or to a direct interaction between DNAJB6 and polyQ peptides that may depend on other cellular components. Here, we have purified the DNAJB6 protein to investigate the suppression mechanism. The purified DNAJB6 protein formed large heterogeneous oligomers, in contrast to the more canonical family member DNAJB1 which is dimeric. Purified DNAJB6 protein, at substoichiometric molar ratios, efficiently suppressed fibrillation of polyQ peptides with 45°Q in a thioflavin T fibrillation. No suppression was obtained with DNAJB1, but with the closest homologue to DNAJB6, DNAJB8. The suppression effect was independent of HSPA1 and ATP. These data, based on purified proteins and controlled fibrillation in vitro, strongly suggest that the fibrillation suppression is due to a direct protein-protein interaction between the polyQ peptides and DNAJB6 and that the DNAJB6 has unique fibrillation suppression properties lacking in DNAJB1. Together, the data obtained in cells and in vitro support the view that DNAJB6 is a peptide-binding chaperone that can interact with polyQ peptides that are incompletely degraded by and released from the proteasome.
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Affiliation(s)
- Cecilia Månsson
- Department of Biochemistry & Structural Biology, Center for Molecular Protein Science, Lund University, Lund, Sweden,
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Moreno Switt AI, Andrus AD, Ranieri ML, Orsi RH, Ivy R, den Bakker HC, Martin NH, Wiedmann M, Boor KJ. Genomic comparison of sporeforming bacilli isolated from milk. BMC Genomics 2014; 15:26. [PMID: 24422886 PMCID: PMC3902026 DOI: 10.1186/1471-2164-15-26] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 01/08/2014] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Sporeformers in the order Bacillales are important contributors to spoilage of pasteurized milk. While only a few Bacillus and Viridibacillus strains can grow in milk at 6°C, the majority of Paenibacillus isolated from pasteurized fluid milk can grow under these conditions. To gain a better understanding of genomic features of these important spoilage organisms and to identify candidate genomic features that may facilitate cold growth in milk, we performed a comparative genomic analysis of selected dairy associated sporeformers representing isolates that can and cannot grow in milk at 6°C. RESULTS The genomes for seven Paenibacillus spp., two Bacillus spp., and one Viridibacillus sp. isolates were sequenced. Across the genomes sequenced, we identified numerous genes encoding antimicrobial resistance mechanisms, bacteriocins, and pathways for synthesis of non-ribosomal peptide antibiotics. Phylogenetic analysis placed genomes representing Bacillus, Paenibacillus and Viridibacillus into three distinct well supported clades and further classified the Paenibacillus strains characterized here into three distinct clades, including (i) clade I, which contains one strain able to grow at 6°C in skim milk broth and one strain not able to grow under these conditions, (ii) clade II, which contains three strains able to grow at 6°C in skim milk broth, and (iii) clade III, which contains two strains unable to grow under these conditions. While all Paenibacillus genomes were found to include multiple copies of genes encoding β-galactosidases, clade II strains showed significantly higher numbers of genes encoding these enzymes as compared to clade III strains. Genome comparison of strains able to grow at 6°C and strains unable to grow at this temperature identified numerous genes encoding features that might facilitate the growth of Paenibacillus in milk at 6°C, including peptidases with cold-adapted features (flexibility and disorder regions in the protein structure) and cold-adaptation related proteins (DEAD-box helicases, chaperone DnaJ). CONCLUSIONS Through a comparative genomics approach we identified a number of genomic features that may relate to the ability of selected Paenibacillus strains to cause spoilage of refrigerated fluid milk. With additional experimental evidence, these data will facilitate identification of targets to detect and control Gram positive spore formers in fluid milk.
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Affiliation(s)
- Andrea I Moreno Switt
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Alexis D Andrus
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Matthew L Ranieri
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Renato H Orsi
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Reid Ivy
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Henk C den Bakker
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Nicole H Martin
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Martin Wiedmann
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
| | - Kathryn J Boor
- 345 Stocking Hall, Department of Food Science, Cornell University, Ithaca, NY 14853, USA
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Kotlarz A, Tukaj S, Krzewski K, Brycka E, Lipinska B. Human Hsp40 proteins, DNAJA1 and DNAJA2, as potential targets of the immune response triggered by bacterial DnaJ in rheumatoid arthritis. Cell Stress Chaperones 2013; 18:653-9. [PMID: 23408083 PMCID: PMC3745263 DOI: 10.1007/s12192-013-0407-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 01/23/2013] [Accepted: 01/24/2013] [Indexed: 01/22/2023] Open
Abstract
Hsp40 proteins of bacterial and human origin are suspected to be involved in the pathogenesis of rheumatoid arthritis (RA). It has been shown that sera of RA patients contain increased levels of antibodies directed to bacterial and human Hsp40s. The aim of this work was to explore immunological similarities between the bacterial (DnaJ) and human (DNAJA1 and DNAJA2) Hsp40 proteins in relation to their possible involvement in the RA. Using polyclonal antibodies directed against a full-length DnaJ or its domains, against DNAJA1 and DNAJA2, as well as monoclonal anti-DnaJ antibodies, we found immunological similarities between the bacterial and human Hsp40s. Both ELISA and Western blotting showed that these similarities were not restricted to the conserved J domains but were also present in the C-terminal variable regions. We also found a positive correlation between the levels of the anti-DnaJ and anti-DNAJA1 antibodies in the sera of RA patients. This finding supports the molecular mimicry hypothesis that human Hsp40 could be the targets of antibodies originally directed against bacterial DnaJ in RA.
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Affiliation(s)
- Agnieszka Kotlarz
- Department of Biochemistry, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
| | - Stefan Tukaj
- Department of Plant Physiology and Biotechnology, University of Gdańsk, Wita Stwosza 59, 80-308 Gdańsk, Poland
| | - Konrad Krzewski
- Department of Biochemistry, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD USA
| | - Elzbieta Brycka
- Department of Molecular Virology, University of Gdansk and Medical University of Gdansk, Kladki 24, 80-822 Gdansk, Poland
| | - Barbara Lipinska
- Department of Biochemistry, University of Gdansk, Wita Stwosza 59, 80-308 Gdansk, Poland
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Barends TRM, Brosi RWW, Steinmetz A, Scherer A, Hartmann E, Eschenbach J, Lorenz T, Seidel R, Shoeman RL, Zimmermann S, Bittl R, Schlichting I, Reinstein J. Combining crystallography and EPR: crystal and solution structures of the multidomain cochaperone DnaJ. Acta Crystallogr D Biol Crystallogr 2013; 69:1540-52. [PMID: 23897477 PMCID: PMC3727329 DOI: 10.1107/s0907444913010640] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 04/18/2013] [Indexed: 11/15/2022]
Abstract
Hsp70 chaperones assist in a large variety of protein-folding processes in the cell. Crucial for these activities is the regulation of Hsp70 by Hsp40 cochaperones. DnaJ, the bacterial homologue of Hsp40, stimulates ATP hydrolysis by DnaK (Hsp70) and thus mediates capture of substrate protein, but is also known to possess chaperone activity of its own. The first structure of a complete functional dimeric DnaJ was determined and the mobility of its individual domains in solution was investigated. Crystal structures of the complete molecular cochaperone DnaJ from Thermus thermophilus comprising the J, GF and C-terminal domains and of the J and GF domains alone showed an ordered GF domain interacting with the J domain. Structure-based EPR spin-labelling studies as well as cross-linking results showed the existence of multiple states of DnaJ in solution with different arrangements of the various domains, which has implications for the function of DnaJ.
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Borges JC, Seraphim TV, Mokry DZ, Almeida FCL, Cyr DM, Ramos CHI. Identification of regions involved in substrate binding and dimer stabilization within the central domains of yeast Hsp40 Sis1. PLoS One 2012; 7:e50927. [PMID: 23227221 PMCID: PMC3515540 DOI: 10.1371/journal.pone.0050927] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 10/26/2012] [Indexed: 11/19/2022] Open
Abstract
Protein folding, refolding and degradation are essential for cellular life and are regulated by protein homeostatic processes such those that involve the molecular chaperone DnaK/Hsp70 and its co-chaperone DnaJ. Hsp70 action is initiated when proteins from the DnaJ family bind an unfolded protein for delivery purposes. In eukaryotes, the DnaJ family can be divided into two main groups, Type I and Type II, represented by yeast cytosolic Ydj1 and Sis1, respectively. Although sharing some unique features both members of the DnaJ family, Ydj1 and Sis1 are structurally and functionally distinct as deemed by previous studies, including the observation that their central domains carry the structural and functional information even in switched chimeras. In this study, we combined several biophysical tools for evaluating the stability of Sis1 and mutants that had the central domains (named Gly/Met rich domain and C-terminal Domain I) deleted or switched to those of Ydj1 to gain insight into the role of these regions in the structure and function of Sis1. The mutants retained some functions similar to full length wild-type Sis1, however they were defective in others. We found that: 1) Sis1 unfolds in at least two steps as follows: folded dimer to partially folded monomer and then to an unfolded monomer. 2) The Gly/Met rich domain had intrinsically disordered characteristics and its deletion had no effect on the conformational stability of the protein. 3) The deletion of the C-terminal Domain I perturbed the stability of the dimer. 4) Exchanging the central domains perturbed the conformational stability of the protein. Altogether, our results suggest the existence of two similar subdomains in the C-terminal domain of DnaJ that could be important for stabilizing each other in order to maintain a folded substrate-binding site as well as the dimeric state of the protein.
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Affiliation(s)
- Júlio C. Borges
- Institute of Chemistry of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil
| | - Thiago V. Seraphim
- Institute of Chemistry of São Carlos, University of São Paulo, São Carlos, São Paulo, Brazil
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, São Paulo, Brazil
- Institute of Biology, University of Campinas UNICAMP, Campinas, São Paulo, Brazil
| | - David Z. Mokry
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, São Paulo, Brazil
| | - Fabio C. L. Almeida
- Institute of Medical Biochemistry, National Center of Nuclear Magnetic Resonance of Macromolecules UFRJ, and National Institute of Science and Technology for Structural Biology and Bioimaging (INBEB), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Douglas M. Cyr
- Department of Cell and Developmental Biology, University of North Carolina, Chapel Hill, North Carolina, United States of America
| | - Carlos H. I. Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, São Paulo, Brazil
- * E-mail:
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Andrews JF, Sykora LJ, Letostak TB, Menezes ME, Mitra A, Barik S, Shevde LA, Samant RS. Cellular stress stimulates nuclear localization signal (NLS) independent nuclear transport of MRJ. Exp Cell Res 2012; 318:1086-93. [PMID: 22504047 DOI: 10.1016/j.yexcr.2012.03.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 03/12/2012] [Accepted: 03/23/2012] [Indexed: 12/14/2022]
Abstract
HSP40 family member MRJ (DNAJB6) has been in the spot light for its relevance to Huntington's, Parkinson's diseases, limb-girdle muscular dystrophy, placental development, neural stem cells, cell cycle and malignancies such as breast cancer and melanoma. This gene has two spliced variants coding for 2 distinct proteins with significant homology. However, MRJ(L) (large variant) is predominantly localized to the nucleus whereas MRJ(S) (small variant) is predominantly cytoplasmic. Interestingly MRJ(S) translocates to the nucleus in response to heat shock. The classical heat shock proteins respond to crises (stress) by increasing the number of molecules, usually by transcriptional up-regulation. Our studies imply that a quick increase in the molar concentration of MRJ in the nuclear compartment is a novel method by which MRJ responds to stress. We found that MRJ(S) shows NLS (nuclear localization signal) independent nuclear localization in response to heat shock and hypoxia. The specificity of this response is realized due to lack of such response by MRJ(S) when challenged by other stressors, such as some cytokines or UV light. Deletion analysis has allowed us to narrow down on a 20 amino acid stretch at the C-terminal region of MRJ(S) as a potential stress sensing region. Functional studies indicated that constitutive nuclear localization of MRJ(S) promoted attributes of malignancy such as proliferation and invasiveness overall indicating distinct phenotypic characteristics of nuclear MRJ(S).
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Affiliation(s)
- Joel F Andrews
- Department of Oncologic Sciences, Mitchell Cancer Institute, University of South Alabama, Mobile, AL, USA
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Griessl MH, Jungkunz I, Sonnewald U, Muller YA. Purification, crystallization and preliminary X-ray diffraction analysis of the Hsp40 protein CPIP1 from Nicotiana tabacum. Acta Crystallogr Sect F Struct Biol Cryst Commun 2012; 68:236-9. [PMID: 22298008 PMCID: PMC3274412 DOI: 10.1107/s1744309111055928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 12/27/2011] [Indexed: 11/10/2022]
Abstract
Chaperones promote many different molecular processes, including the folding, targeting and degradation of proteins. The best-studied chaperone system consists of the Hsp70s and their co-chaperones the Hsp40s. Chaperone function can be hijacked by viruses in plants. Potato virus Y interacts via its coat protein with an Hsp40 from Nicotiana tabacum, referred to as NtCPIP1, in order to regulate replication. To understand the molecular determinants of this mechanism, different variants of NtCPIP1 were expressed, purified and crystallized. While crystals of wild-type NtCPIP1 diffracted to 8.0 Å resolution, the deletion mutant NtCPIP1-Δ(1:127) crystallized in space group P2(1)2(1)2 and diffracted to 2.4 Å resolution.
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Affiliation(s)
- Martin H. Griessl
- Lehrstuhl für Biotechnik, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Henkestrasse 91, D-91052 Erlangen, Germany
| | - Isabel Jungkunz
- Lehrstuhl für Biochemie, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Straudtstrasse S, D-91058 Erlangen, Germany
| | - Uwe Sonnewald
- Lehrstuhl für Biochemie, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Straudtstrasse S, D-91058 Erlangen, Germany
| | - Yves A. Muller
- Lehrstuhl für Biotechnik, Department of Biology, Friedrich-Alexander University Erlangen-Nuremberg, Henkestrasse 91, D-91052 Erlangen, Germany
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Benitez BA, Alvarado D, Cai Y, Mayo K, Chakraverty S, Norton J, Morris JC, Sands MS, Goate A, Cruchaga C. Exome-sequencing confirms DNAJC5 mutations as cause of adult neuronal ceroid-lipofuscinosis. PLoS One 2011; 6:e26741. [PMID: 22073189 PMCID: PMC3208569 DOI: 10.1371/journal.pone.0026741] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 10/02/2011] [Indexed: 02/06/2023] Open
Abstract
We performed whole-exome sequencing in two autopsy-confirmed cases and an elderly unaffected control from a multigenerational family with autosomal dominant neuronal ceroid lipofuscinosis (ANCL). A novel single-nucleotide variation (c.344T>G) in the DNAJC5 gene was identified. Mutational screening in an independent family with autosomal dominant ANCL found an in-frame single codon deletion (c.346_348 delCTC) resulting in a deletion of p.Leu116del. These variants fulfill all genetic criteria for disease-causing mutations: they are found in unrelated families with the same disease, exhibit complete segregation between the mutation and the disease, and are absent in healthy controls. In addition, the associated amino acid substitutions are located in evolutionarily highly conserved residues and are predicted to functionally affect the encoded protein (CSPα). The mutations are located in a cysteine-string domain, which is required for membrane targeting/binding, palmitoylation, and oligomerization of CSPα. We performed a comprehensive in silico analysis of the functional and structural impact of both mutations on CSPα. We found that these mutations dramatically decrease the affinity of CSPα for the membrane. We did not identify any significant effect on palmitoylation status of CSPα. However, a reduction of CSPα membrane affinity may change its palmitoylation and affect proper intracellular sorting. We confirm that CSPα has a strong intrinsic aggregation propensity; however, it is not modified by the mutations. A complementary disease-network analysis suggests a potential interaction with other NCLs genes/pathways. This is the first replication study of the identification of DNAJC5 as the disease-causing gene for autosomal dominant ANCL. The identification of the novel gene in ANCL will allow us to gain a better understanding of the pathological mechanism of ANCLs and constitutes a great advance toward the development of new molecular diagnostic tests and may lead to the development of potential therapies.
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Affiliation(s)
- Bruno A. Benitez
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
| | - David Alvarado
- Department of Pediatrics, Washington University, St. Louis, Missouri, United States of America
| | - Yefei Cai
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
| | - Kevin Mayo
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
| | - Sumitra Chakraverty
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
| | - Joanne Norton
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
| | - John C. Morris
- Department of Neurology, Washington University, St. Louis, Missouri, United States of America
| | - Mark S. Sands
- Department of Pediatrics, Washington University, St. Louis, Missouri, United States of America
- Hope Center Program on Protein Aggregation and Neurodegeneration, Washington University, St. Louis, Missouri, United States of America
| | - Alison Goate
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
- Department of Neurology, Washington University, St. Louis, Missouri, United States of America
- Hope Center Program on Protein Aggregation and Neurodegeneration, Washington University, St. Louis, Missouri, United States of America
- Department of Genetics, Washington University, St. Louis, Missouri, United States of America
| | - Carlos Cruchaga
- Department of Psychiatry, Washington University, St. Louis, Missouri, United States of America
- Hope Center Program on Protein Aggregation and Neurodegeneration, Washington University, St. Louis, Missouri, United States of America
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Silva JC, Borges JC, Cyr DM, Ramos CHI, Torriani IL. Central domain deletions affect the SAXS solution structure and function of yeast Hsp40 proteins Sis1 and Ydj1. BMC Struct Biol 2011; 11:40. [PMID: 22011374 PMCID: PMC3236591 DOI: 10.1186/1472-6807-11-40] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 10/19/2011] [Indexed: 11/10/2022]
Abstract
BACKGROUND Ydj1 and Sis1 are structurally and functionally distinct Hsp40 proteins of the yeast cytosol. Sis1 is an essential gene whereas the ydj1 gene is essential for growth at elevated temperatures and cannot complement sis1 gene deletion. Truncated polypeptides capable of complementing the sis1 gene deletion comprise the J-domain of either Sis1 or Ydj1 connected to the G/F region of Sis1 (but not Ydj1). Sis1 mutants in which the G/F was deleted but G/M maintained were capable of complementing the sis1 gene deletion. RESULTS To investigate the relevance of central domains on the structure and function of Ydj1 and Sis1 we prepared Sis1 constructs deleting specific domains. The mutants had decreased affinity for heated luciferase but were equally capable of stimulating ATPase activity of Hsp70. Detailed low resolution structures were obtained and the overall flexibility of Hsp40 and its mutants were assessed using SAXS methods. Deletion of either the G/M or the G/M plus CTDI domains had little impact on the quaternary structure of Sis1 analyzed by the SAXS technique. However, deletion of the ZFLR-CTDI changed the relative position of the J-domains in Ydj1 in such a way that they ended up resembling that of Sis1. The results revealed that the G/F and G/M regions are not the only flexible domains. All model structures exhibit a common clamp-like conformation. CONCLUSIONS Our results suggest that the central domains, previously appointed as important features for substrate binding, are also relevant keeping the J-domains in their specific relative positions. The clamp-like architecture observed seems also to be favorable to the interactions of Hsp40 with Hsp70.
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Affiliation(s)
- Julio C Silva
- Department of Condensed Matter Physics, "Gleb Wataghin" Physics Institute, State University of Campinas (UNICAMP), Campinas, SP 13083-859, Brazil
- Brazilian Biosciences National Laboratory, Center for Research in Energy and Materials (CNPEM), Campinas, SP 13083-970, Brazil
- European Synchrotron Radiation Facility, Grenoble, France
| | - Julio C Borges
- Institute of Chemistry of São Carlos, University of São Paulo, São Carlos, SP 13.560-970, Brazil
| | - Douglas M Cyr
- Department of Cell and Developmental Biology, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Carlos HI Ramos
- Department of Organic Chemistry, Institute of Chemistry, University of Campinas UNICAMP, SP 13083-970, Brazil
| | - Iris L Torriani
- Department of Condensed Matter Physics, "Gleb Wataghin" Physics Institute, State University of Campinas (UNICAMP), Campinas, SP 13083-859, Brazil
- Brazilian Biosciences National Laboratory, Center for Research in Energy and Materials (CNPEM), Campinas, SP 13083-970, Brazil
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Ajjawi I, Coku A, Froehlich JE, Yang Y, Osteryoung KW, Benning C, Last RL. A J-like protein influences fatty acid composition of chloroplast lipids in Arabidopsis. PLoS One 2011; 6:e25368. [PMID: 22028775 PMCID: PMC3196505 DOI: 10.1371/journal.pone.0025368] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Accepted: 09/01/2011] [Indexed: 12/26/2022] Open
Abstract
A comprehensive understanding of the lipid and fatty acid metabolic machinery is needed for optimizing production of oils and fatty acids for fuel, industrial feedstocks and nutritional improvement in plants. T-DNA mutants in the poorly annotated Arabidopsis thaliana gene At1g08640 were identified as containing moderately high levels (50–100%) of 16∶1Δ7 and 18∶1Δ9 leaf fatty acids and subtle decreases (5–30%) of 16∶3 and 18∶3 (http://www.plastid.msu.edu/). TLC separation of fatty acids in the leaf polar lipids revealed that the chloroplastic galactolipids monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG) were the main lipid types affected by this mutation. Analysis of the inferred amino acid sequence of At1g08640 predicted the presence of a transit peptide, three transmembrane domains and an N-terminal J-like domain, and the gene was named CJD1 for Chloroplast J-like Domain 1. GFP reporter experiments and in vitro chloroplast import assays demonstrated CJD1 is a chloroplast membrane protein. Screening of an Arabidopsis cDNA library by yeast-2-hybrid (Y2H) using the J-like domain of CJD1 as bait identified a plastidial inner envelope protein (Accumulation and Replication of Chloroplasts 6, ARC6) as the primary interacting partner in the Y2H assay. ARC6 plays a central role in chloroplast division and binds CJD1 via its own J-like domain along with an adjacent conserved region whose function is not fully known. These results provide a starting point for future investigations of how mutations in CJD1 affect lipid composition.
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Affiliation(s)
- Imad Ajjawi
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - Ardian Coku
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - John E. Froehlich
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Michigan State University (MSU)–Department of Engineering (DOE) Plant Research Laboratories, Michigan State University, East Lansing, Michigan, United States of America
| | - Yue Yang
- Department of Plant Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - Katherine W. Osteryoung
- Department of Plant Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - Christoph Benning
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
| | - Robert L. Last
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, United States of America
- Department of Plant Biology, Michigan State University, East Lansing, Michigan, United States of America
- * E-mail:
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Shorter J. The mammalian disaggregase machinery: Hsp110 synergizes with Hsp70 and Hsp40 to catalyze protein disaggregation and reactivation in a cell-free system. PLoS One 2011; 6:e26319. [PMID: 22022600 PMCID: PMC3194798 DOI: 10.1371/journal.pone.0026319] [Citation(s) in RCA: 235] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Accepted: 09/23/2011] [Indexed: 12/21/2022] Open
Abstract
Bacteria, fungi, protozoa, chromista and plants all harbor homologues of Hsp104, a AAA+ ATPase that collaborates with Hsp70 and Hsp40 to promote protein disaggregation and reactivation. Curiously, however, metazoa do not possess an Hsp104 homologue. Thus, whether animal cells renature large protein aggregates has long remained unclear. Here, it is established that mammalian cytosol prepared from different sources possesses a potent, ATP-dependent protein disaggregase and reactivation activity, which can be accelerated and stimulated by Hsp104. This activity did not require the AAA+ ATPase, p97. Rather, mammalian Hsp110 (Apg-2), Hsp70 (Hsc70 or Hsp70) and Hsp40 (Hdj1) were necessary and sufficient to slowly dissolve large disordered aggregates and recover natively folded protein. This slow disaggregase activity was conserved to yeast Hsp110 (Sse1), Hsp70 (Ssa1) and Hsp40 (Sis1 or Ydj1). Hsp110 must engage substrate, engage Hsp70, promote nucleotide exchange on Hsp70, and hydrolyze ATP to promote disaggregation of disordered aggregates. Similarly, Hsp70 must engage substrate and Hsp110, and hydrolyze ATP for protein disaggregation. Hsp40 must harbor a functional J domain to promote protein disaggregation, but the J domain alone is insufficient. Optimal disaggregase activity is achieved when the Hsp40 can stimulate the ATPase activity of Hsp110 and Hsp70. Finally, Hsp110, Hsp70 and Hsp40 fail to rapidly remodel amyloid forms of the yeast prion protein, Sup35, or the Parkinson's disease protein, alpha-synuclein. However, Hsp110, Hsp70 and Hsp40 enhanced the activity of Hsp104 against these amyloid substrates. Taken together, these findings suggest that Hsp110 fulfils a subset of Hsp104 activities in mammals. Moreover, they suggest that Hsp104 can collaborate with the mammalian disaggregase machinery to rapidly remodel amyloid conformers.
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Affiliation(s)
- James Shorter
- Stellar-Chance Laboratories, Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America.
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Proft J, Faraji J, Robbins JC, Zucchi FCR, Zhao X, Metz GA, Braun JEA. Identification of bilateral changes in TID1 expression in the 6-OHDA rat model of Parkinson's disease. PLoS One 2011; 6:e26045. [PMID: 22016808 PMCID: PMC3189242 DOI: 10.1371/journal.pone.0026045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Accepted: 09/16/2011] [Indexed: 01/06/2023] Open
Abstract
Parkinson's disease (PD) is a common neurodegenerative disease characterized by the loss of dopaminergic neurons in the substantia nigra and the aggregation of α-synuclein into Lewy bodies. Existing therapies address motor dysfunction but do not halt progression of the disease. A still unresolved question is the biochemical pathway that modulates the outcome of protein misfolding and aggregation processes in PD. The molecular chaperone network plays an important defensive role against cellular protein misfolding and has been identified as protective in experimental models of protein misfolding diseases like PD. Molecular mechanisms underlying chaperone-neuroprotection are actively under investigation. Current evidence implicates a number of molecular chaperones in PD including Hsp25, Hsp70 and Hsp90, however their precise involvement in the neurodegenerative cascade is unresolved. The J protein family (DnaJ or Hsp40 protein family) has long been known to be important in protein conformational processes.We assessed sensory and motor function of control and PD rats and then evaluated the brain region-specific expression levels of select J proteins by Western analysis. Surprisingly, we observed a widespread 26 kDa breakdown product of the J protein, TID1, (tumorous imaginal discs, mtHsp40 or DnaJ3) in a 6-hydroxydopamine (6-OHDA) rat model of PD in which food handling, gait symmetry and sensory performance were impaired. Greater behavioral deficits were associated with lower TID1 expression. Furthermore, direct application of either 6-OHDA or MPP+ (1-methyl-4-phenylpyridinum) to CAD (CNS-derived catecholinaminergic neuronal cell line) cell cultures, reduced TID1 expression levels.Our results suggest that changes in cellular TID1 are a factor in the pathogenesis of PD by impeding functional and structural compensation and exaggerating neurodegenerative processes. In contrast, no changes were observed in CSPα, Hsp40, Hsp70, Hsc70 and PrP(C) levels and no activation of caspase3 was observed. This study links TID1 to PD and provides a new target for therapeutics that halts the PD progression.
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Affiliation(s)
- Juliane Proft
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada
| | - Jamshid Faraji
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, Canada
- Neuroscience Research Centre, Golestan University of Medical Sciences, Gorgan, Islamic Republic of Iran
| | - Jerrah C. Robbins
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - Fabiola C. R. Zucchi
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - Xiaoxi Zhao
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada
| | - Gerlinde A. Metz
- Canadian Centre for Behavioural Neuroscience, University of Lethbridge, Lethbridge, Canada
| | - Janice E. A. Braun
- Hotchkiss Brain Institute, Department of Physiology and Pharmacology, University of Calgary, Calgary, Canada
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Abstract
P58IPK is one of the endoplasmic reticulum- (ER-) localised DnaJ (ERdj) proteins which interact with the chaperone BiP, the mammalian ER ortholog of Hsp70, and are thought to contribute to the specificity and regulation of its diverse functions. P58IPK, expression of which is upregulated in response to ER stress, has been suggested to act as a co-chaperone, binding un- or misfolded proteins and delivering them to BiP. In order to give further insights into the functions of P58IPK, and the regulation of BiP by ERdj proteins, we have determined the crystal structure of human P58IPK to 3.0 Å resolution using a combination of molecular replacement and single wavelength anomalous diffraction. The structure shows the human P58IPK monomer to have a very elongated overall shape. In addition to the conserved J domain, P58IPK contains nine N-terminal tetratricopeptide repeat motifs, divided into three subdomains of three motifs each. The J domain is attached to the C-terminal end via a flexible linker, and the structure shows the conserved Hsp70-binding histidine-proline-aspartate (HPD) motif to be situated on the very edge of the elongated protein, 100 Å from the putative binding site for unfolded protein substrates. The residues that comprise the surface surrounding the HPD motif are highly conserved in P58IPK from other organisms but more varied between the human ERdj proteins, supporting the view that their regulation of different BiP functions is facilitated by differences in BiP-binding.
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Affiliation(s)
- Maria Svärd
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Ekaterina I. Biterova
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jean-Marie Bourhis
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jodie E. Guy
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
- * E-mail:
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49
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Lin J, Wilson MA. Escherichia coli thioredoxin-like protein YbbN contains an atypical tetratricopeptide repeat motif and is a negative regulator of GroEL. J Biol Chem 2011; 286:19459-69. [PMID: 21498507 PMCID: PMC3103325 DOI: 10.1074/jbc.m111.238741] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 04/13/2011] [Indexed: 11/06/2022] Open
Abstract
Many proteins contain a thioredoxin (Trx)-like domain fused with one or more partner domains that diversify protein function by the modular construction of new molecules. The Escherichia coli protein YbbN is a Trx-like protein that contains a C-terminal domain with low homology to tetratricopeptide repeat motifs. YbbN has been proposed to act as a chaperone or co-chaperone that aids in heat stress response and DNA synthesis. We report the crystal structure of YbbN, which is an elongated molecule with a mobile Trx domain and four atypical tetratricopeptide repeat motifs. The Trx domain lacks a canonical CXXC active site architecture and is not a functional oxidoreductase. A variety of proteins in E. coli interact with YbbN, including multiple ribosomal protein subunits and a strong interaction with GroEL. YbbN acts as a mild inhibitor of GroESL chaperonin function and ATPase activity, suggesting that it is a negative regulator of the GroESL system. Combined with previous observations that YbbN enhances the DnaK-DnaJ-GrpE chaperone system, we propose that YbbN coordinately regulates the activities of these two prokaryotic chaperones, thereby helping to direct client protein traffic initially to DnaK. Therefore, YbbN may play a role in integrating the activities of different chaperone pathways in E. coli and related bacteria.
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Affiliation(s)
- Jiusheng Lin
- From the Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588-0664
| | - Mark A. Wilson
- From the Department of Biochemistry and Redox Biology Center, University of Nebraska, Lincoln, Nebraska 68588-0664
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50
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Hinault MP, Cuendet AFH, Mattoo RUH, Mensi M, Dietler G, Lashuel HA, Goloubinoff P. Stable alpha-synuclein oligomers strongly inhibit chaperone activity of the Hsp70 system by weak interactions with J-domain co-chaperones. J Biol Chem 2010; 285:38173-82. [PMID: 20847048 PMCID: PMC2992251 DOI: 10.1074/jbc.m110.127753] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 09/14/2010] [Indexed: 11/06/2022] Open
Abstract
α-Synuclein aggregation and accumulation in Lewy bodies are implicated in progressive loss of dopaminergic neurons in Parkinson disease and related disorders. In neurons, the Hsp70s and their Hsp40-like J-domain co-chaperones are the only known components of chaperone network that can use ATP to convert cytotoxic protein aggregates into harmless natively refolded polypeptides. Here we developed a protocol for preparing a homogeneous population of highly stable β-sheet enriched toroid-shaped α-Syn oligomers with a diameter typical of toxic pore-forming oligomers. These oligomers were partially resistant to in vitro unfolding by the bacterial Hsp70 chaperone system (DnaK, DnaJ, GrpE). Moreover, both bacterial and human Hsp70/Hsp40 unfolding/refolding activities of model chaperone substrates were strongly inhibited by the oligomers but, remarkably, not by unstructured α-Syn monomers even in large excess. The oligomers acted as a specific competitive inhibitor of the J-domain co-chaperones, indicating that J-domain co-chaperones may preferably bind to exposed bulky misfolded structures in misfolded proteins and, thus, complement Hsp70s that bind to extended segments. Together, our findings suggest that inhibition of the Hsp70/Hsp40 chaperone system by α-Syn oligomers may contribute to the disruption of protein homeostasis in dopaminergic neurons, leading to apoptosis and tissue loss in Parkinson disease and related neurodegenerative diseases.
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Affiliation(s)
- Marie-Pierre Hinault
- From the Plant Molecular Biology Department, University of Lausanne, Biophore, 1015 Lausanne, Switzerland and
| | | | - Rayees U. H. Mattoo
- From the Plant Molecular Biology Department, University of Lausanne, Biophore, 1015 Lausanne, Switzerland and
| | - Mounir Mensi
- the Laboratoire de Physique de la Matière Vivante, IPMC-SB and
| | | | - Hilal A. Lashuel
- Laboratory of Molecular Neurobiology and Neuroproteomics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
| | - Pierre Goloubinoff
- From the Plant Molecular Biology Department, University of Lausanne, Biophore, 1015 Lausanne, Switzerland and
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