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Peng S, Matts R, Deng J. Structural basis of the key residue W320 responsible for Hsp90 conformational change. J Biomol Struct Dyn 2023; 41:9745-9755. [PMID: 36373326 PMCID: PMC10183053 DOI: 10.1080/07391102.2022.2146197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 11/06/2022] [Indexed: 11/16/2022]
Abstract
The 90-kDa heat shock protein (Hsp90) is a homodimeric molecular chaperone with ATPase activity, which has become an intensely studied target for the development of drugs for the treatment of cancer, neurodegenerative and infectious diseases. The equilibrium between Hsp90 dimers and oligomers is important for modulating its function. In the absence of ATP, the passive chaperone activity of Hsp90 dimers and oligomers has been shown to stabilize client proteins as a holdase, which enhances substrate binding and prevents irreversible aggregation and precipitation of the substrate proteins. In the presence of ATP and its associated cochaperones, Hsp90 homodimers act as foldases with the binding and hydrolysis of ATP driving conformational changes that mediate client folding. Crystal structures of both wild type and W320A mutant Hsp90αMC (middle/C-terminal domain) have been determined, which displayed a preference for hexameric and dimeric states, respectively. Structural analysis showed that W320 is a key residue for Hsp90 oligomerization by forming intermolecular interactions at the Hsp90 hexameric interface through cation-π interactions with R367. W320A substitution results in the formation of a more open conformation of Hsp90, which has not previously been reported, and the induction of a conformational change in the catalytic loop. The structures provide new insights into the mechanism by which W320 functions as a key switch for conformational changes in Hsp90 self-oligomerization, and binding cochaperones and client proteins.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Shuxia Peng
- Department of Biochemistry and Molecular biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
| | - Robert Matts
- Department of Biochemistry and Molecular biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
| | - Junpeng Deng
- Department of Biochemistry and Molecular biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
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2
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Chiosis G, Digwal CS, Trepel JB, Neckers L. Structural and functional complexity of HSP90 in cellular homeostasis and disease. Nat Rev Mol Cell Biol 2023; 24:797-815. [PMID: 37524848 PMCID: PMC10592246 DOI: 10.1038/s41580-023-00640-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2023] [Indexed: 08/02/2023]
Abstract
Heat shock protein 90 (HSP90) is a chaperone with vital roles in regulating proteostasis, long recognized for its function in protein folding and maturation. A view is emerging that identifies HSP90 not as one protein that is structurally and functionally homogeneous but, rather, as a protein that is shaped by its environment. In this Review, we discuss evidence of multiple structural forms of HSP90 in health and disease, including homo-oligomers and hetero-oligomers, also termed epichaperomes, and examine the impact of stress, post-translational modifications and co-chaperones on their formation. We describe how these variations influence context-dependent functions of HSP90 as well as its interaction with other chaperones, co-chaperones and proteins, and how this structural complexity of HSP90 impacts and is impacted by its interaction with small molecule modulators. We close by discussing recent developments regarding the use of HSP90 inhibitors in cancer and how our new appreciation of the structural and functional heterogeneity of HSP90 invites a re-evaluation of how we discover and implement HSP90 therapeutics for disease treatment.
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Affiliation(s)
- Gabriela Chiosis
- Chemical Biology Program, Memorial Sloan Kettering Institute, New York, NY, USA.
- Department of Medicine, Memorial Sloan Kettering Institute, New York, NY, USA.
| | - Chander S Digwal
- Chemical Biology Program, Memorial Sloan Kettering Institute, New York, NY, USA
| | - Jane B Trepel
- Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Len Neckers
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA.
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3
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Su M, Zhou S, Li J, Lin N, Chi T, Zhang M, Lv X, Hu Y, Bai T, Chang F. Benzo(a)pyrene regulates chaperone-mediated autophagy via heat shock protein 90. Toxicol Lett 2023:S0378-4274(23)00208-4. [PMID: 37390851 DOI: 10.1016/j.toxlet.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 05/23/2023] [Accepted: 06/26/2023] [Indexed: 07/02/2023]
Abstract
AIMS Some studies have shown that the Benzo(a)pyrene (BaP) exposure induced oxidative damage, DNA damage and autophagy, but the molecular mechanism is not clear. Heat shock protein 90 (HSP90) is regarded as an important target in cancer therapy and a key factor in autophagy. Therefore, this study aims to clarify the new mechanism of BaP regulating CMA through HSP90. MAIN METHODS C57BL mice were fed with BaP at a dose of 25.3mg/kg. A549 cells were treated with different concerntrations of BaP, and MTT assay was used to observe the effect of BaP on the proliferation of A549 cells. DNA damage was detected by alkaline comet assay. Focus experiment for detection of γ-H2AX by immunofluorescence. The mRNA expression of HSP90, HSC70 and Lamp-2a was detected by qPCR. The protein expressions of HSP90, HSC70 and Lamp-2a were detected by Western blot. Next, we knocked down HSP90 expression by the HSP90 Inhibitor, NVP-AUY 922, exposed or HSP90α shRNA lentivirus transduction in A549 cells. KEY FINDINGS In these studies, we first found that heat shock protein 90 (HSP90), heat shock cognate 70 (HSC70) and lysosomal-associated membrane protein type 2 receptor (Lamp-2a) expressions of C57BL mice lung tissue and A549 cells exposed to BaP were significant increase, as well as BaP induced DNA double-strand breaks (DSBs) and activated DNA damage responses, as evidenced by comet assay and γ-H2AX foci analysis in A549 cells. Our results demonstrated BaP induced CMA and caused DNA damage. Next, we knocked down HSP90 expression by the HSP90 Inhibitor, NVP-AUY 922, exposed or HSP90α shRNA lentivirus transduction in A549 cells. HSC70 and Lamp-2a expressions of these cells exposed to BaP were not significant increase, which showed that BaP inducted CMA was mediated by HSP90. Further, HSP90α shRNA prevented BaP induced of BaP which suggested BaP regulated CMA and caused DNA damage by HSP90. Our results elucidated a new mechanism of BaP regulated CMA through HSP90. SIGNIFICANCE BaP regulated CMA through HSP90. HSP90 is involved in the regulation of gene instability induced by DNA damage by BaP, which promotes CMA. Our study also revealed that BaP regulates CMA through HSP90. This study fills the gap of the effect of BaP on autophagy and its mechanism, which will lead to a more comprehensive understanding of the action mechanism of BaP.
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Affiliation(s)
- Min Su
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China
| | - Shuhong Zhou
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China; School of Basic Medicine, Inner Mongolia Medical University, Hohhot, China
| | - Jun Li
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China; GLP Center of Inner Mongolia Medical University, Hohhot, China; Inner Mongolia New Drug Screening Engineering Research Center, Hohhot, China
| | - Nan Lin
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China
| | - Tao Chi
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China
| | - Mengdi Zhang
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China; GLP Center of Inner Mongolia Medical University, Hohhot, China
| | - Xiaoli Lv
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China; Inner Mongolia New Drug Screening Engineering Research Center, Hohhot, China
| | - Yuxia Hu
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China; GLP Center of Inner Mongolia Medical University, Hohhot, China; Inner Mongolia New Drug Screening Engineering Research Center, Hohhot, China
| | - Tuya Bai
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China; Inner Mongolia New Drug Screening Engineering Research Center, Hohhot, China.
| | - Fuhou Chang
- School of Pharmacy, Inner Mongolia Medical University, Hohhot, China.
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4
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Joshi A, Ito T, Picard D, Neckers L. The Mitochondrial HSP90 Paralog TRAP1: Structural Dynamics, Interactome, Role in Metabolic Regulation, and Inhibitors. Biomolecules 2022; 12:biom12070880. [PMID: 35883436 PMCID: PMC9312948 DOI: 10.3390/biom12070880] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 02/04/2023] Open
Abstract
The HSP90 paralog TRAP1 was discovered more than 20 years ago; yet, a detailed understanding of the function of this mitochondrial molecular chaperone remains elusive. The dispensable nature of TRAP1 in vitro and in vivo further complicates an understanding of its role in mitochondrial biology. TRAP1 is more homologous to the bacterial HSP90, HtpG, than to eukaryotic HSP90. Lacking co-chaperones, the unique structural features of TRAP1 likely regulate its temperature-sensitive ATPase activity and shed light on the alternative mechanisms driving the chaperone’s nucleotide-dependent cycle in a defined environment whose physiological temperature approaches 50 °C. TRAP1 appears to be an important bioregulator of mitochondrial respiration, mediating the balance between oxidative phosphorylation and glycolysis, while at the same time promoting mitochondrial homeostasis and displaying cytoprotective activity. Inactivation/loss of TRAP1 has been observed in several neurodegenerative diseases while TRAP1 expression is reported to be elevated in multiple cancers and, as with HSP90, evidence of addiction to TRAP1 has been observed. In this review, we summarize what is currently known about this unique HSP90 paralog and why a better understanding of TRAP1 structure, function, and regulation is likely to enhance our understanding of the mechanistic basis of mitochondrial homeostasis.
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Affiliation(s)
- Abhinav Joshi
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute (NCI), Bethesda, MD 20892, USA; (A.J.); (T.I.)
| | - Takeshi Ito
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute (NCI), Bethesda, MD 20892, USA; (A.J.); (T.I.)
| | - Didier Picard
- Department of Molecular and Cellular Biology, Université de Genève, Sciences III, 30 Quai Ernest-Ansermet, CH-1211 Geneva, Switzerland;
| | - Len Neckers
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute (NCI), Bethesda, MD 20892, USA; (A.J.); (T.I.)
- Correspondence: ; Tel.: +1-240-858-3918
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5
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Peng S, Woodruff J, Pathak PK, Matts RL, Deng J. Crystal structure of the middle and C-terminal domains of Hsp90α labeled with a coumarin derivative reveals a potential allosteric binding site as a drug target. Acta Crystallogr D Struct Biol 2022; 78:571-585. [PMID: 35503206 PMCID: PMC9063849 DOI: 10.1107/s2059798322002261] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/26/2022] [Indexed: 12/01/2022] Open
Abstract
The 90 kDa heat-shock protein (Hsp90) is an abundant molecular chaperone that is essential to activate, stabilize and regulate the function of a plethora of client proteins. As drug targets for the treatment of cancer and neurodegenerative diseases, Hsp90 inhibitors that bind to the N-terminal ATP-binding site of Hsp90 have shown disappointing efficacy in clinical trials. Thus, allosteric regulation of the function of Hsp90 by compounds that interact with its middle and C-terminal (MC) domains is now being pursued as a mechanism to inhibit the ATPase activity and client protein-binding activity of Hsp90 without concomitant induction of the heat-shock response. Here, the crystal structure of the Hsp90αMC protein covalently linked to a coumarin derivative, MDCC {7-diethylamino-3-[N-(2-maleimidoethyl)carbamoyl]coumarin}, which is located in a hydrophobic pocket that is formed at the Hsp90αMC hexamer interface, is reported. MDCC binding leads to the hexamerization of Hsp90, and the stabilization and conformational changes of three loops that are critical for its function. A fluorescence competition assay demonstrated that other characterized coumarin and isoflavone-containing Hsp90 inhibitors compete with MDCC binding, suggesting that they could bind at a common site or that they might allosterically alter the structure of the MDCC binding site. This study provides insights into the mechanism by which the coumarin class of allosteric inhibitors potentially disrupt the function of Hsp90 by regulating its oligomerization and the burial of interaction sites involved in the ATP-dependent folding of Hsp90 clients. The hydrophobic binding pocket characterized here will provide new structural information for future drug design.
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Affiliation(s)
- Shuxia Peng
- Department of Biochemistry and Molecular Biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
| | - Jeff Woodruff
- Department of Biochemistry and Molecular Biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
| | - Prabhat Kumar Pathak
- Department of Biochemistry and Molecular Biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
| | - Robert L. Matts
- Department of Biochemistry and Molecular Biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
| | - Junpeng Deng
- Department of Biochemistry and Molecular Biology, Oklahoma State University, 246 Noble Research Center, Stillwater, OK 74078, USA
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6
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Ashraf HJ, Ramos Aguila LC, Ahmed S, Haq IU, Ali H, Ilyas M, Gu S, Wang L. Comparative transcriptome analysis of Tamarixia radiata (Hymenoptera: Eulophidae) reveals differentially expressed genes upon heat shock. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2022; 41:100940. [PMID: 34794105 DOI: 10.1016/j.cbd.2021.100940] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 11/02/2021] [Accepted: 11/07/2021] [Indexed: 06/13/2023]
Abstract
Temperature is a key parameter that affects insect population, abundance, and distribution in tropical and subtropical regions. Tamarixia radiata Waterson (Hymenoptera: Eulophidae) is a species-specific ectoparasitoid widely used as a biological control agent for the major citrus pest Diphornia citri Kuwayama (Hemiptera: Liviidea). To date, T. radiata response to high temperature at the molecular level still is unclear. In this study, we conducted a comparative analysis of the transcriptomes of T. radiata exposed at 25 °C and 38 °C for 15 min. A total of 51,072 unigenes were obtained, 22,413 annotated with a mean length of 1054 bp. Differential expression analysis showed that 502 genes were identified, including 476 genes significantly up-regulated and 26 genes down-regulated after heat stress exposure. The Gene Ontology analysis showed that most enriched DEGs are categorized into "cellular process", "metabolic process" and "DNA binding." In addition, "Lysosome," "Longevity regulating pathway-multiple species," and "starch and sucrose metabolism" were highly enriched in Kyoto Encyclopedia of Genes and Genomes pathways. Transcriptome analyses showed that heat stress significantly induced the transcription of the molecular chaperone, immune response, stress signaling transduction, and oxidation resistance, including highly expressed heat shock proteins, ATPases, and detoxifying enzymes. Furthermore, the expression patterns of thirteen genes including heat shock proteins (HSP), glutathione S-transferase (GST) and cytochrome P450 were consistent with the transcriptome results obtained through qRT-PCR. Together, our results provided a comprehensive study of the molecular response of T. radiata to heat stress and provides new insight for the future functional validation of heat resistance-related genes.
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Affiliation(s)
- Hafiza Javaria Ashraf
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Key Laboratory of Biopesticide and Biochemistry, MOE, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Luis Carlos Ramos Aguila
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Key Laboratory of Biopesticide and Biochemistry, MOE, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Sohail Ahmed
- Department of Entomology, University of Agriculture, Faisalabad 38040, Pakistan
| | - Inzamam Ul Haq
- College of Plant Protection, Gansu Agricultural University, No. 1 Yingmen Village, Anning District, Lanzhou 730070, China
| | - Hina Ali
- Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Muhammad Ilyas
- Department of Management Science and Engineering, School of Business, Qingdao University, Qingdao 266071, China
| | - Shuangyue Gu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Key Laboratory of Biopesticide and Biochemistry, MOE, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Liande Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Key Laboratory of Biopesticide and Biochemistry, MOE, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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7
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Li W, Chen Y, Ye M, Wang D, Chen Q. Evolutionary history of the heat shock protein 90 (Hsp90) family of 43 plants and characterization of Hsp90s in Solanum tuberosum. Mol Biol Rep 2020; 47:6679-6691. [PMID: 32780253 DOI: 10.1007/s11033-020-05722-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/02/2020] [Indexed: 01/12/2023]
Abstract
Heat shock protein 90 genes/proteins (Hsp90s) are related to the stress resistance found in various plant species. These proteins affect the growth and development of plants and have important effects on the plants under various stresses (cold, drought and salt) in the environment. In this study, we identified 334 Hsp90s from 43 plant species, and Hsp90s were found in all species. Phylogenetic tree and conserved domain database analysis of all Hsp90s showed three independent clades. The analysis of motifs, gene duplication events, and the expression data from PGSC website revealed the gene structures, evolution relationships, and expression patterns of the Hsp90s. In addition, analysis of the transcript levels of the 7 Hsp90s in potato (Solanum tuberosum) under low temperature and high temperature stresses showed that these genes were related to the temperature stresses. Especially StHsp90.2 and StHsp90.4, under high or low temperature conditions, the expression levels in leaves, stems, or roots were significantly up-regulated. Our findings revealed the evolution of the Hsp90s, which had guiding significance for further researching the precise functions of the Hsp90s.
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Affiliation(s)
- Wan Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China
| | - Yue Chen
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China
| | - Minghui Ye
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China
| | - Dongdong Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China.
| | - Qin Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, Xianyang, 712100, Shaanxi, China.
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8
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Li H, Zhao X, Qiao H, He X, Tan J, Hao D. Comparative Transcriptome Analysis of the Heat Stress Response in Monochamus alternatus Hope (Coleoptera: Cerambycidae). Front Physiol 2020; 10:1568. [PMID: 32038275 PMCID: PMC6985590 DOI: 10.3389/fphys.2019.01568] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 12/12/2019] [Indexed: 12/13/2022] Open
Abstract
Temperature is a critical factor of insect population abundance and distribution. Monochamus alternatus Hope (Coleoptera: Cerambycidae) is a significant concern since it is transmitted vector of the pinewood nematode posing enormous economic and environmental losses. This pest shows tolerance to heat stress, especially extremely high temperatures. Exposing for 6, 12, 24, 48, or 96 h, the 50% median lethal temperatures (Ltem50) for fourth-instar larvae were 47.5, 45.5, 43.9, 43.4, and 42.3°C, respectively. A total of 63,360 unigenes were obtained from complementary DNA libraries of M. alternatus fourth-instar larvae (kept at 25°C and exposed to 40°C for 3 h) and annotated with six databases. Five hundred sixty-one genes were significantly upregulated, and 245 genes were downregulated after heat stress. The Gene Ontology enrichment analysis showed that most different expression genes are categorized into “protein folding” and “unfold protein binding” terms. In addition, “Longevity regulating pathway-multiple species,” “Antigen processing and presentation” as well as “MAPK signaling pathway” were significantly enriched Kyoto Encyclopedia of Genes and Genomes pathways. Further analysis of different expression genes showed that metabolism processes were suppressed, while ubiquitin proteolytic system, heat shock proteins, immune response, superoxide dismutase, cytochrome P450s, and aldehyde dehydrogenase were induced after heat shock. The stress signaling transduction pathways such as MAPK, Hippo, and JAK-STAT might be central convergence points in M. alternatus heat tolerance mechanism. The expression levels from quantitative real-time PCR of 13 randomly selected genes were consistent with the transcriptome results. These results showed that M. alternatus possessed strong heat tolerance and genes related to protein activity, immune response, and signal transduction composed of a complicated heat tolerance mechanism of M. alternatus. This research provided new insights into the mechanisms of thermal tolerance in other insects and aided in exploring the function of heat resistance-related genes.
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Affiliation(s)
- Hui Li
- Forestry College, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.,Forest Protection, Forestry College, Nanjing Forestry University, Nanjing, China
| | - Xinyi Zhao
- Forestry College, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.,Forest Protection, Forestry College, Nanjing Forestry University, Nanjing, China
| | - Heng Qiao
- Forestry College, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.,Forest Protection, Forestry College, Nanjing Forestry University, Nanjing, China
| | - Xuanyu He
- Forestry College, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.,Forest Protection, Forestry College, Nanjing Forestry University, Nanjing, China
| | - Jiajin Tan
- Forestry College, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.,Forest Protection, Forestry College, Nanjing Forestry University, Nanjing, China
| | - Dejun Hao
- Forestry College, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China.,Forest Protection, Forestry College, Nanjing Forestry University, Nanjing, China
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9
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Yahara I. A role for epigenetic adaption in evolution. Genes Cells 2019; 24:524-533. [PMID: 31273901 PMCID: PMC6852114 DOI: 10.1111/gtc.12709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/23/2019] [Accepted: 06/16/2019] [Indexed: 11/27/2022]
Abstract
The outcome of epigenetic responses to stress depends strictly on genetic background, suggesting that altered phenotypes, when induced, are created by a combination of induced epigenetic factors and pre‐existing allelic ones. When individuals with altered phenotypes are selected and subjected to successive breeding, alleles that potentiate epigenetic responses could accumulate in offspring populations. It is reasonable to suppose that many, if not all, of these allelic genes could also be involved in creating new phenotypes under nonstressful conditions. In this review, I discuss the possibility that the accumulation of such alleles in selected individuals with an epigenetic phenotype could give rise to individuals that exhibit the same phenotype even in the absence of stress.
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Affiliation(s)
- Ichiro Yahara
- Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
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10
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Noor ZS, Goldman JW, Lawler WE, Telivala B, Braiteh F, DiCarlo BA, Kennedy K, Adams B, Wang X, Jones B, Slamon DJ, Garon EB. Luminespib plus pemetrexed in patients with non-squamous non-small cell lung cancer. Lung Cancer 2019; 135:104-109. [PMID: 31446981 DOI: 10.1016/j.lungcan.2019.05.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/21/2019] [Accepted: 05/13/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Luminespib (AUY922) is a second-generation heat shock protein 90 (HSP90) inhibitor with demonstrated activity in non-small cell lung cancer (NSCLC). Since luminespib reduces levels of dihydrofolate reductase (DHFR), a key enzymatic target of pemetrexed, we assessed the safety and tolerability of luminespib in combination with pemetrexed in patients with previously treated metastatic non-squamous non-small cell lung cancer (NSCLC). We also sought to study the pharmacokinetics and correlate tumor dihydrofolate reductase (DHFR) expression with clinical response. METHODS Patients received weekly luminespib at either 40 mg/m2, 55 mg/m2, or 70 mg/m2 according to a standard 3 + 3 dose-escalation design along with pemetrexed at 500 mg/m2 followed by an expansion at the maximum tolerated dose (MTD). RESULTS Two-dose limiting toxicities (DLTs) were experienced in the 70 mg/m2 cohort, therefore the MTD was determined to be 55 mg/m2. 69% (N = 9) of patients experienced ophthalmologic toxicity related to luminespib. Maximum serum concentration (Cmax) of luminespib was associated with increased grade 2 drug related adverse events (DRAEs) (rs = 0.74, P < 0.01), with volume of distribution (VD) inversely associated with the number of DRAEs (rs = - 0.81, P = 0.004) and ophthalmologic related DRAEs (rs = - 0.65, P = 0.04). The best response was partial response in one patient for 20 months, prior to expiration of all luminespib. Amongst patients treated at the MTD, the objective response rate was 14%. CONCLUSION In patients with previously treated metastatic NSCLC, the MTD of luminespib in combination with pemetrexed was 55 mg/m2 per week. The combination of luminespib and pemetrexed demonstrated clinical activity. Tolerability of luminespib with pemetrexed is limited by ocular toxicity.
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Affiliation(s)
- Zorawar S Noor
- David Geffen School of Medicine at University of California Los Angeles, United States.
| | - Jonathan W Goldman
- David Geffen School of Medicine at University of California Los Angeles, United States
| | | | | | - Fadi Braiteh
- Comprehensive Cancer Centers of Nevada, United States
| | - Brian A DiCarlo
- David Geffen School of Medicine at University of California Los Angeles, United States
| | | | - Brad Adams
- David Geffen School of Medicine at University of California Los Angeles, United States
| | - Xiaoyan Wang
- David Geffen School of Medicine at University of California Los Angeles, United States
| | - Benjamin Jones
- David Geffen School of Medicine at University of California Los Angeles, United States
| | - Dennis J Slamon
- David Geffen School of Medicine at University of California Los Angeles, United States
| | - Edward B Garon
- David Geffen School of Medicine at University of California Los Angeles, United States.
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11
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Lepvrier E, Thomas D, Garnier C. Hsp90 Quaternary Structures and the Chaperone Cycle: Highly Flexible Dimeric and Oligomeric Structures and Their Regulation by Co-Chaperones. CURR PROTEOMICS 2018. [DOI: 10.2174/1570164615666180522095147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Proposed models of the function of Hsp90 are characterised by high flexibility of the dimeric
state and conformational changes regulated by both nucleotide binding and hydrolysis, and by
co-chaperone interactions. In addition to its dimeric state, Hsp90 self-associates upon particular stimuli.
The Hsp90 dimer is the building block up to the hexamer that we named “cosy nest”, and the dodecamer
results from the association of two hexamers. Oligomers exhibit chaperone activity, but their
exact mechanism of action has not yet been determined. One of the best ways to elucidate how oligomers
might operate is to study their interactions with co-chaperone proteins known to regulate the
Hsp90 chaperone cycle, such as p23 and Aha1. In this review, we summarise recent results and conclude
that Hsp90 oligomers are key players in the chaperone cycle. Crucible-shaped quaternary structures
likely provide an ideal environment for client protein accommodation and folding, as is the case
for other Hsp families. Confirmation of the involvement of Hsp90 oligomers in the chaperone cycle
and a better understanding of their functionality will allow us to address some of the more enigmatic
aspects of Hsp90 activity. Utilising this knowledge, future work will highlight how Hsp90 oligomers
and co-chaperones cooperate to build the structures required to fold or refold numerous different client
proteins.
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Affiliation(s)
- Eléonore Lepvrier
- Structure et Dynamique des Macromolecules, UMR-CNRS 6026, Interactions Cellulaires et Moleculaires, Universite de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Daniel Thomas
- Structure et Dynamique des Macromolecules, UMR-CNRS 6026, Interactions Cellulaires et Moleculaires, Universite de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Cyrille Garnier
- Universite de Rennes 1, Campus de Beaulieu, F-35042 Rennes Cedex, France
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12
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Wang T, Rodina A, Dunphy MP, Corben A, Modi S, Guzman ML, Gewirth DT, Chiosis G. Chaperome heterogeneity and its implications for cancer study and treatment. J Biol Chem 2018; 294:2162-2179. [PMID: 30409908 DOI: 10.1074/jbc.rev118.002811] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The chaperome is the collection of proteins in the cell that carry out molecular chaperoning functions. Changes in the interaction strength between chaperome proteins lead to an assembly that is functionally and structurally distinct from each constituent member. In this review, we discuss the epichaperome, the cellular network that forms when the chaperome components of distinct chaperome machineries come together as stable, functionally integrated, multimeric complexes. In tumors, maintenance of the epichaperome network is vital for tumor survival, rendering them vulnerable to therapeutic interventions that target critical epichaperome network components. We discuss how the epichaperome empowers an approach for precision medicine cancer trials where a new target, biomarker, and relevant drug candidates can be correlated and integrated. We introduce chemical biology methods to investigate the heterogeneity of the chaperome in a given cellular context. Lastly, we discuss how ligand-protein binding kinetics are more appropriate than equilibrium binding parameters to characterize and unravel chaperome targeting in cancer and to gauge the selectivity of ligands for specific tumor-associated chaperome pools.
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Affiliation(s)
- Tai Wang
- From the Chemical Biology Program and
| | | | | | - Adriana Corben
- the Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, New York 10029
| | - Shanu Modi
- Medicine, Memorial Sloan Kettering Cancer Center, New York, New York 10065
| | - Monica L Guzman
- Hematology and Medical Oncology, Department of Medicine, Weill Cornell Medical College, New York, New York 10065, and
| | - Daniel T Gewirth
- the Hauptman-Woodward Medical Research Institute, Buffalo, New York 14203
| | - Gabriela Chiosis
- From the Chemical Biology Program and .,Medicine, Memorial Sloan Kettering Cancer Center, New York, New York 10065
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13
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Abstract
In this Opinion article, we aim to address how cells adapt to stress and the repercussions chronic stress has on cellular function. We consider acute and chronic stress-induced changes at the cellular level, with a focus on a regulator of cellular stress, the chaperome, which is a protein assembly that encompasses molecular chaperones, co-chaperones and other co-factors. We discuss how the chaperome takes on distinct functions under conditions of stress that are executed in ways that differ from the one-on-one cyclic, dynamic functions exhibited by distinct molecular chaperones. We argue that through the formation of multimeric stable chaperome complexes, a state of chaperome hyperconnectivity, or networking, is gained. The role of these chaperome networks is to act as multimolecular scaffolds, a particularly important function in cancer, where they increase the efficacy and functional diversity of several cellular processes. We predict that these concepts will change how we develop and implement drugs targeting the chaperome to treat cancer.
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Affiliation(s)
- Suhasini Joshi
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Tai Wang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Thaís L S Araujo
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Sahil Sharma
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Jeffrey L Brodsky
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Gabriela Chiosis
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
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14
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Hoter A, El-Sabban ME, Naim HY. The HSP90 Family: Structure, Regulation, Function, and Implications in Health and Disease. Int J Mol Sci 2018; 19:E2560. [PMID: 30158430 PMCID: PMC6164434 DOI: 10.3390/ijms19092560] [Citation(s) in RCA: 348] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 08/23/2018] [Accepted: 08/27/2018] [Indexed: 12/22/2022] Open
Abstract
The mammalian HSP90 family of proteins is a cluster of highly conserved molecules that are involved in myriad cellular processes. Their distribution in various cellular compartments underlines their essential roles in cellular homeostasis. HSP90 and its co-chaperones orchestrate crucial physiological processes such as cell survival, cell cycle control, hormone signaling, and apoptosis. Conversely, HSP90, and its secreted forms, contribute to the development and progress of serious pathologies, including cancer and neurodegenerative diseases. Therefore, targeting HSP90 is an attractive strategy for the treatment of neoplasms and other diseases. This manuscript will review the general structure, regulation and function of HSP90 family and their potential role in pathophysiology.
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Affiliation(s)
- Abdullah Hoter
- Department of Biochemistry and Chemistry of Nutrition, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover 30559, Germany.
| | - Marwan E El-Sabban
- Department of Anatomy, Cell Biology and Physiological Sciences, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.
| | - Hassan Y Naim
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover 30559, Germany.
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15
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Wang M, Zou Z, Li Q, Sun K, Chen X, Li X. The CsHSP17.2 molecular chaperone is essential for thermotolerance in Camellia sinensis. Sci Rep 2017; 7:1237. [PMID: 28450727 PMCID: PMC5430664 DOI: 10.1038/s41598-017-01407-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Accepted: 03/28/2017] [Indexed: 11/25/2022] Open
Abstract
Small heat shock proteins (sHSPs) play important roles in responses to heat stress. However, the functions of sHSPs in tea plants (Camellia sinensis) remain uncharacterized. A novel sHSP gene, designated CsHSP17.2, was isolated from tea plants. Subcellular localization analyses indicated that the CsHSP17.2 protein was present in the cytosol and the nucleus. CsHSP17.2 expression was significantly up-regulated by heat stress but was unaffected by low temperature. The CsHSP17.2 transcript levels increased following salt and polyethylene glycol 6000 treatments but decreased in the presence of abscisic acid. The molecular chaperone activity of CsHSP17.2 was demonstrated in vitro. Transgenic Escherichia coli and Pichia pastoris expressing CsHSP17.2 exhibited enhanced thermotolerance. The transgenic Arabidopsis thaliana exhibited higher maximum photochemical efficiencies, greater soluble protein proline contents, higher germination rates and higher hypocotyl elongation length than the wild-type controls. The expression levels of several HS-responsive genes increased in transgenic A. thaliana plants. Additionally, the CsHSP17.2 promoter is highly responsive to high-temperature stress in A. thaliana. Our results suggest that CsHSP17.2 may act as a molecular chaperone to mediate heat tolerance by maintaining maximum photochemical efficiency and protein synthesis, enhancing the scavenging of reactive oxygen species and inducing the expression of HS-responsive genes.
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Affiliation(s)
- Mingle Wang
- Tea Research Institute, Nanjing Agricultural University, Nanjing, 210095, China
| | - Zhongwei Zou
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Qinghui Li
- Tea Research Institute, Nanjing Agricultural University, Nanjing, 210095, China
| | - Kang Sun
- Tea Research Institute, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xuan Chen
- Tea Research Institute, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xinghui Li
- Tea Research Institute, Nanjing Agricultural University, Nanjing, 210095, China.
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16
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Wang HJ, Shi ZK, Shen QD, Xu CD, Wang B, Meng ZJ, Wang SG, Tang B, Wang S. Molecular Cloning and Induced Expression of Six Small Heat Shock Proteins Mediating Cold-Hardiness in Harmonia axyridis (Coleoptera: Coccinellidae). Front Physiol 2017; 8:60. [PMID: 28232804 PMCID: PMC5299025 DOI: 10.3389/fphys.2017.00060] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 01/23/2017] [Indexed: 12/18/2022] Open
Abstract
The main function of small heat shock proteins (sHSPs) as molecular chaperones is to protect proteins from denaturation under adverse conditions. Molecular and physiological data were used to examine the sHSPs underlying cold-hardiness in Harmonia axyridis. Complementary DNA sequences were obtained for six H. axyridis sHSPs based on its transcriptome, and the expression of the genes coding for these sHSPs was evaluated by quantitative real-time PCR (qRT-PCR) in several developmental stages, under short-term cooling or heating conditions, and in black and yellow females of experimental and overwintering populations under low-temperature storage. In addition, we measured water content and the super cooling and freezing points (SCP and FP, respectively) of H. axyridis individuals from experimental and overwintering populations. The average water content was not significantly different between adults of both populations, but the SCP and FP of the overwintering population were significantly lower than that of the experimental population. Overall, the six sHSPs genes showed different expression patterns among developmental stages. In the short-term cooling treatment, Hsp16.25 and Hsp21.00 expressions first increased and then decreased, while Hsp10.87 and Hsp21.56 expressions increased during the entire process. Under short-term heating, the expressions of Hsp21.00, Hsp21.62, Hsp10.87, and Hsp16.25 showed an increasing trend, whereas Hsp36.77 first decreased and then increased. Under low-temperature storage conditions, the expression of Hsp36.77 decreased, while the expressions of Hsp21.00 and Hsp21.62 were higher than that of the control group in the experimental population. The expression of Hsp36.77 first increased and then decreased, whereas Hsp21.56 expression was always higher than that of the control group in the overwintering population. Thus, differences in sHSPs gene expression were correlated with the H. axyridis forms, suggesting that the mechanism of cold resistance might differ among them. Although, Hsp36.77, Hsp16.25, Hsp21.00, and Hsp21.62 regulated cold- hardiness, the only significant differences between overwintering and experimental populations were found for Hsp16.25 and Hsp21.00.
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Affiliation(s)
- Hui-Juan Wang
- College of Life and Environmental Sciences, Hangzhou Normal UniversityHangzhou, China
| | - Zuo-Kun Shi
- College of Life and Environmental Sciences, Hangzhou Normal UniversityHangzhou, China
| | - Qi-Da Shen
- College of Life and Environmental Sciences, Hangzhou Normal UniversityHangzhou, China
| | - Cai-Di Xu
- College of Life and Environmental Sciences, Hangzhou Normal UniversityHangzhou, China
| | - Bing Wang
- Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry SciencesBeijing, China
| | - Zhao-Jun Meng
- College of Forestry, Northeast Forestry UniversityHarbin, China
| | - Shi-Gui Wang
- College of Life and Environmental Sciences, Hangzhou Normal UniversityHangzhou, China
| | - Bin Tang
- College of Life and Environmental Sciences, Hangzhou Normal UniversityHangzhou, China
| | - Su Wang
- Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry SciencesBeijing, China
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17
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Krzemień-Ojak Ł, Góral A, Joachimiak E, Filipek A, Fabczak H. Interaction of a Novel Chaperone PhLP2A With the Heat Shock Protein Hsp90. J Cell Biochem 2016; 118:420-429. [PMID: 27496612 DOI: 10.1002/jcb.25669] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 08/04/2016] [Indexed: 01/23/2023]
Abstract
PhLP2 is a small cytosolic protein that belongs to the highly conserved phosducin-like family of proteins. In amniote genomes there are two PhLP2 homologs, PhLP2A and PhLP2B. It has been shown that mammalian PhLP2A modulates the CCT/TRiC chaperonin activity during folding of cytoskeletal proteins. In order to better understand the function of PhLP2A in cellular protein quality control system, in the present study we have searched for its protein targets. Applying immunoprecipitation followed by mass spectrometry analysis we have identified Hsp90 as a partner of PhLP2A. With pull down experiments, we have confirmed this interaction in protein lysate and using purified proteins we have shown that PhLP2A interacts directly with Hsp90. Furthermore, the proximity ligation assay (PLA) performed on mIMCD-3 cells has shown that PhLP2A forms complexes with Hsp90 which are mainly localized in the cytoplasm of these cells. Further analysis has indicated that the level of PhLP2A increases after heat shock or radicicol treatment, similarly as the level of Hsp90, and that expression of PhLP2A after heat shock is regulated at the transcriptional level. Moreover, using recombinant luciferase we have shown that PhLP2A stabilizes this enzyme in a folding competent state and prevents its denaturation and aggregation. In addition, overexpression of PhLP2A in HEK-293 cells leads to increased heat stress resistance. Altogether, our results have shown that PhLP2A interacts with Hsp90 and exhibits molecular chaperone activity toward denatured proteins. J. Cell. Biochem. 118: 420-429, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Łucja Krzemień-Ojak
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur Street, Warsaw, 02-093, Poland
| | - Agnieszka Góral
- Laboratory of Calcium Binding Proteins, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur Street, Warsaw, 02-093, Poland
| | - Ewa Joachimiak
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur Street, Warsaw, 02-093, Poland
| | - Anna Filipek
- Laboratory of Calcium Binding Proteins, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur Street, Warsaw, 02-093, Poland
| | - Hanna Fabczak
- Laboratory of Cytoskeleton and Cilia Biology, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur Street, Warsaw, 02-093, Poland
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18
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Nandi SK, Chakraborty A, Panda AK, Biswas A. Conformational perturbation, hydrophobic interactions and oligomeric association are responsible for the enhanced chaperone function of Mycobacterium leprae HSP18 under pre-thermal condition. RSC Adv 2016. [DOI: 10.1039/c6ra00167j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Chaperone function of HSP18 is enhanced upon pre-heating at 60 °C and above which may be due to structural alterations.
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Affiliation(s)
- Sandip Kumar Nandi
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar-751 013
- India
| | - Ayon Chakraborty
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar-751 013
- India
| | - Alok Kumar Panda
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar-751 013
- India
| | - Ashis Biswas
- School of Basic Sciences
- Indian Institute of Technology Bhubaneswar
- Bhubaneswar-751 013
- India
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19
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Hsp90 Inhibitors for the Treatment of Chronic Myeloid Leukemia. LEUKEMIA RESEARCH AND TREATMENT 2015; 2015:757694. [PMID: 26770832 PMCID: PMC4681826 DOI: 10.1155/2015/757694] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 11/11/2015] [Accepted: 11/12/2015] [Indexed: 12/29/2022]
Abstract
Chronic myeloid leukemia (CML) is a hematological malignancy that arises due to reciprocal translocation of 3' sequences from c-Abelson (ABL) protooncogene of chromosome 9 with 5' sequence of truncated break point cluster region (BCR) on chromosome 22. BCR-ABL is a functional oncoprotein p210 that exhibits constitutively activated tyrosine kinase causing genomic alteration of hematopoietic stem cells. BCR-ABL specific tyrosine kinase inhibitors (TKIs) successfully block CML progression. However, drug resistance owing to BCR-ABL mutations and overexpression is still an issue. Heat-shock proteins (Hsps) function as molecular chaperones facilitating proper folding of nascent polypeptides. Their increased expression under stressful conditions protects cells by stabilizing unfolded or misfolded peptides. Hsp90 is the major mammalian protein and is required by BCR-ABL for stabilization and maturation. Hsp90 inhibitors destabilize the binding of BCR-ABL protein thus leading to the formation of heteroprotein complex that is eventually degraded by the ubiquitin-proteasome pathway. Results of many novel Hsp90 inhibitors that have entered into various clinical trials are encouraging. The present review targets the current development in the CML treatment by availing Hsp90 specific inhibitors.
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20
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Lepvrier E, Nigen M, Moullintraffort L, Chat S, Allegro D, Barbier P, Thomas D, Nazabal A, Garnier C. Hsp90 oligomerization process: How can p23 drive the chaperone machineries? BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2015; 1854:1412-24. [PMID: 26151834 DOI: 10.1016/j.bbapap.2015.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 06/28/2015] [Accepted: 07/02/2015] [Indexed: 01/16/2023]
Abstract
The 90-kDa heat shock protein (Hsp90) is a highly flexible dimer that is able to self-associate in the presence of divalent cations or under heat shock. In a previous work, we focused on the Mg2+-induced oligomerization process of Hsp90, and characterized the oligomers. Combining analytical ultracentrifugation, size-exclusion chromatography coupled to multi-angle laser light scattering and high-mass matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, we studied the interaction of p23 with both Hsp90 dimer and oligomers. Even if p23 predominantly binds the Hsp90 dimer, we demonstrated, for the first time, that p23 is also able to interact with Hsp90 oligomers, shifting the Hsp90 dimer-oligomers equilibrium toward dimer. Our results showed that the Hsp90:p23 binding stoichiometry decreases with the Hsp90 oligomerization degree. Therefore, we propose a model in which p23 would act as a "protein wedge" regarding the Hsp90 dimer closure and the Hsp90 oligomerization process.
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Affiliation(s)
- Eléonore Lepvrier
- Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Michaël Nigen
- UMR1208 Ingénierie des Agropolymères et Technologies Emergentes INRA-Montpellier SupAgro-CIRAD-Université Montpellier, 2 Place Pierre Viala, F-34060 Montpellier, France
| | - Laura Moullintraffort
- Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Sophie Chat
- Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France
| | - Diane Allegro
- Aix-Marseille Université, INSERM UMR 911, Centre de Recherche en Oncologie biologique et Onco-pharmacologie, 13385 Marseille Cedex 5, France
| | - Pascale Barbier
- Aix-Marseille Université, INSERM UMR 911, Centre de Recherche en Oncologie biologique et Onco-pharmacologie, 13385 Marseille Cedex 5, France
| | - Daniel Thomas
- Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France
| | | | - Cyrille Garnier
- Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 35042 Rennes Cedex, France.
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21
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Lepvrier E, Moullintraffort L, Nigen M, Goude R, Allegro D, Barbier P, Peyrot V, Thomas D, Nazabal A, Garnier C. Hsp90 Oligomers Interacting with the Aha1 Cochaperone: An Outlook for the Hsp90 Chaperone Machineries. Anal Chem 2015; 87:7043-51. [PMID: 26076190 DOI: 10.1021/acs.analchem.5b00051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The 90-kDa heat shock protein (Hsp90) is a highly flexible dimer able to self-associate in the presence of divalent cations or under heat shock. This study investigated the relationship between Hsp90 oligomers and the Hsp90 cochaperone Aha1 (activator of Hsp90 ATPase). The interactions of Aha1 with Hsp90 dimers and oligomers were evaluated by ultracentrifugation, size-exclusion chromatography coupled to multiangle laser light scattering and high-mass matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Hsp90 dimer was able to bind up to four Aha1 molecules, and Hsp90 oligomers are also able to interact with Aha1. The binding of Aha1 did not interfere with the Hsp90 oligomerization process. Except for Hsp90 dimer, the stoichiometry of the interaction remained constant, at 2 Aha1 molecules per Hsp90 dimer, regardless of the degree of Hsp90 oligomerization. Moreover, Aha1 predominantly bound to Hsp90 oligomers. Thus, the ability of Hsp90 oligomers to bind the Aha1 ATPase activator reinforces their role within the Hsp90 chaperone machineries.
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Affiliation(s)
- Eléonore Lepvrier
- †Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 263 Avenue du Général Leclerc, 35042 Rennes, Cedex, France
| | - Laura Moullintraffort
- †Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 263 Avenue du Général Leclerc, 35042 Rennes, Cedex, France
| | - Michaël Nigen
- ‡UMR1208 Ingénierie des Agropolymères et Technologies Emergentes INRA-Montpellier SupAgro-CIRAD, Université Montpellier, 2 Place Pierre Viala, F-34060 Montpellier, France
| | - Renan Goude
- §Microbiologie risques infectieux, EA 1254, Université de Rennes 1, Campus Beaulieu, 35042 Rennes, Cedex, France
| | - Diane Allegro
- ∥Aix-Marseille Université, INSERM UMR 911, Centre de Recherche en Oncologie biologique et Onco-pharmacologie, 13385 Marseille, Cedex 5, France
| | - Pascale Barbier
- ∥Aix-Marseille Université, INSERM UMR 911, Centre de Recherche en Oncologie biologique et Onco-pharmacologie, 13385 Marseille, Cedex 5, France
| | - Vincent Peyrot
- ∥Aix-Marseille Université, INSERM UMR 911, Centre de Recherche en Oncologie biologique et Onco-pharmacologie, 13385 Marseille, Cedex 5, France
| | - Daniel Thomas
- †Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 263 Avenue du Général Leclerc, 35042 Rennes, Cedex, France
| | | | - Cyrille Garnier
- †Translation and Folding, UMR-CNRS 6290, Université de Rennes 1, Campus Beaulieu, 263 Avenue du Général Leclerc, 35042 Rennes, Cedex, France
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22
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Yang C, Wang L, Liu C, Zhou Z, Zhao X, Song L. The polymorphisms in the promoter of HSP90 gene and their association with heat tolerance of bay scallop. Cell Stress Chaperones 2015; 20:297-308. [PMID: 25261233 PMCID: PMC4326393 DOI: 10.1007/s12192-014-0546-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 09/15/2014] [Accepted: 09/16/2014] [Indexed: 12/11/2022] Open
Abstract
The heat shock protein 90 (HSP90) is a highly abundant and ubiquitous molecular chaperone which plays essential roles in many cellular processes. In the present study, the messenger RNA (mRNA) expressions of HSP90 after acute heat stress were investigated in two bay scallop populations (Argopecten irradians irradians and Argopecten irradians concentricus). The heat-resistant scallop A. i. concentricus, which is distributed in Zhanjiang, China, exhibited significantly higher induction of HSP90 compared with that of the heat-sensitive scallop A. i. irradians, which is distributed in Qinhuangdao, China. The promoter sequence of HSP90 gene from bay scallop (AiHSP90) was cloned, and the polymorphisms within this region were investigated by sequencing to analyze their association with heat tolerance. A total of six single nucleotide polymorphisms (SNPs), including -1167 T-C, -1023 A-C, -799 C-T, -774 A-G, -686 C-T, and -682 A-C, were identified in the amplified promoter region, and most of them affected the putative transcription factor binding sites except for locus -1167. All the six SNP sites were found to be associated with heat tolerance after Hardy-Weinberg equilibrium (HWE) and association analysis. Moreover, haplotypes CACACC and TCTATC were also found to be associated with heat tolerance based on the result of linkage disequilibrium and association analysis. The results provided insights into the molecular mechanisms underlying the thermal adaptation of different congener endemic bay scallops, which suggested that the increased heat tolerance of A. i. concentricus (compared with A. i. irradians) was associated with the higher expression of AiHSP90. Meanwhile, the six genotypes (-1167 TT, -1023 CC, -799 TT, -774 GG, -686 CC, and -682 AA) and two haplotypes (CACACC and TCTATC) could be used as potential markers for scallop selection breeding with higher heat tolerance.
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Affiliation(s)
- Chuanyan Yang
- />Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao, 266071 China
| | - Lingling Wang
- />Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao, 266071 China
| | - Conghui Liu
- />Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao, 266071 China
- />University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Zhi Zhou
- />Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao, 266071 China
| | - Xin Zhao
- />Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao, 266071 China
| | - Linsheng Song
- />Key laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Rd., Qingdao, 266071 China
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23
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A Novel Mechanism for Cross-Adaptation between Heat and Altitude Acclimation: The Role of Heat Shock Protein 90. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/121402] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Heat shock protein 90 (HSP90) is a member of a family of molecular chaperone proteins which can be upregulated by various stressors including heat stress leading to increases in HSP90 protein expression. Its primary functions include (1) renaturing and denaturing of damaged proteins caused by heat stress and (2) interacting with client proteins to induce cell signaling for gene expression. The latter function is of interest because, in cancer cells, HSP90 has been reported to interact with the transcription hypoxic-inducible factor 1α (HIF1α). In a normoxic environment, HIF1α is degraded and therefore has limited physiological function. In contrast, in a hypoxic environment, stabilized HIF1α acts to promote erythropoiesis and angiogenesis. Since HSP90 interacts with HIF1α, and HSP90 can be upregulated from heat acclimation in humans, we present a proposal that heat acclimation can mimic molecular adaptations to those of altitude exposure. Specifically, we propose that heat acclimation increases HSP90 which then stabilizes HIF1α in a normoxic environment. This has many implications since HIF1α regulates red blood cell and vasculature formation. In this paper we will discuss (1) the functional roles of HSP90 and HIF1α, (2) the interaction between HSP90 and other client proteins including HIF1α, and (3) results from in vitro studies that may suggest how the relationship between HSP90 and HIF1α might be applied to individuals preparing to make altitude sojourns.
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Senanayake TH, Lu Y, Bohling A, Raja S, Band H, Vinogradov SV. Encapsulation of poorly soluble drugs in polymer-drug conjugates: effect of dual-drug nanoformulations on cancer therapy. Pharm Res 2014; 31:1605-15. [PMID: 24452808 DOI: 10.1007/s11095-013-1265-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 12/09/2013] [Indexed: 01/13/2023]
Abstract
PURPOSE Current cancer chemotherapy is gradually shifting to the application of drug combinations that prevent development of drug resistance. Many anticancer drugs have poor solubility and limited oral bioavailability. Using an innovative approach, we developed dual-drug nanoformulations of a polymeric nanogel conjugate with anticancer 5-FU nucleoside analog, floxuridine (FLOX), and the second anticancer drugs, paclitaxel (PCL), or a geldanamycin analog, 17-AAG, for combination therapy. METHODS PCL or 17-AAG had been encapsulated in the cholesteryl-polyvinyl alcohol-floxuridine nanogel (CPVA-FLOX) by simple solution mixing and sonication. Dual nanodrugs formed particles with diameter 180 nm and either drug content (5-20%) that were stable and could be administered orally. Their cytotoxicity in human and mouse cancer cells was determined by MTT assay, and cellular target inhibition - by Western blot analysis. Tumor growth inhibition was evaluated using an orthotopic mouse mammary 4T1 cancer model. RESULTS CPVA-FLOX was more potent than free drug in cancer models including drug-resistant ones; while dual nanodrugs demonstrated a significant synergy (CPVA-FLOX/PCL), or showed no significant synergy (CPVA-FLOX/17-AAG) compared to free drugs (PCL or 17-AAG). Dual nanodrug CPVA-FLOX/17-AAG effect on its cellular target (HSP70) was similar to 17-AAG alone. In animal model, however, both dual nanodrugs effectively inhibited tumor growth compared to CPVA-FLOX after oral administration. CONCLUSION Oral dual-drug nanoformulations of poorly-soluble drugs proved to be a highly efficient combination anticancer therapy in preclinical studies.
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Affiliation(s)
- Thulani H Senanayake
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska, 68198-6025, USA
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Cha JY, Ahn G, Kim JY, Kang SB, Kim MR, Su'udi M, Kim WY, Son D. Structural and functional differences of cytosolic 90-kDa heat-shock proteins (Hsp90s) in Arabidopsis thaliana. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2013; 70:368-373. [PMID: 23827697 DOI: 10.1016/j.plaphy.2013.05.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 05/20/2013] [Indexed: 06/02/2023]
Abstract
The seven members of the 90-kDa heat shock protein (Hsp90) family encode highly conserved molecular chaperones essential for cell survival in Arabidopsis thaliana. Hsp90 are abundant proteins, localized in different compartments with AtHsp90.1-4 in the cytosol and AtHsp90.5-7 in different organelles. Among the AtHsp90, AtHsp90.1, is stress-inducible and shares comparatively low sequence identity with the constitutively expressed AtHsp90.2-4. Even though abundant information is available on mammalian cytosolic Hsp90 proteins, it is unknown whether cytosolic Hsp90 proteins display different structural and functional properties. We have now analyzed two A. thalianas cytosolic Hsp90s, AtHsp90.1 and AtHsp90.3, for functional divergence. AtHsp90.3 showed higher holdase chaperone activity than AtHsp90.1, although both AtHsp90s exhibited effective chaperone activity. Size-exclusion chromatography revealed different oligomeric states distinguishing the two Hsp90 proteins. While AtHsp90.1 exists in several oligomeric states, including monomers, dimers and higher oligomers, AtHsp90.3 exists predominantly in a high oligomeric state. High oligomeric state of AtHsp90.1 showed higher holdase chaperone activity than the respective monomer or dimer states. When high oligomeric forms of AtHsp90.1 and AtHsp90.3 are reduced by DTT, activity was reduced compared to that found in the native high oligomeric state. In addition, ATP-dependent foldase chaperone activity of AtHsp90.3 was higher with strong intrinsic ATPase activity than that of AtHsp90.1. As a conclusion, the two A. thaliana cytosolic Hsp90 proteins display different functional activities depending on structural differences, implying functional divergence although the proteins are localized to the same sub-cellular organelle.
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Affiliation(s)
- Joon-Yung Cha
- Division of Applied Life Science (BK21 and WCU Program), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea
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Bergmayr C, Thurner P, Keuerleber S, Kudlacek O, Nanoff C, Freissmuth M, Gruber CW. Recruitment of a cytoplasmic chaperone relay by the A2A adenosine receptor. J Biol Chem 2013; 288:28831-44. [PMID: 23965991 PMCID: PMC3789979 DOI: 10.1074/jbc.m113.464776] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The adenosine A2A receptor is a prototypical rhodopsin-like G protein-coupled receptor but has several unique structural features, in particular a long C terminus (of >120 residues) devoid of a palmitoylation site. It is known to interact with several accessory proteins other than those canonically involved in signaling. However, it is evident that many more proteins must interact with the A2A receptor, if the trafficking trajectory of the receptor is taken into account from its site of synthesis in the endoplasmic reticulum (ER) to its disposal by the lysosome. Affinity-tagged versions of the A2A receptor were expressed in HEK293 cells to identify interacting partners residing in the ER by a proteomics approach based on tandem affinity purification. The receptor-protein complexes were purified in quantities sufficient for analysis by mass spectrometry. We identified molecular chaperones (heat-shock proteins HSP90α and HSP70-1A) that interact with and retain partially folded A2A receptor prior to ER exit. Complex formation between the A2A receptor and HSP90α (but not HSP90β) and HSP70-1A was confirmed by co-affinity precipitation. HSP90 inhibitors also enhanced surface expression of the receptor in PC12 cells, which endogenously express the A2A receptor. Finally, proteins of the HSP relay machinery (e.g. HOP/HSC70-HSP90 organizing protein and P23/HSP90 co-chaperone) were recovered in complexes with the A2A receptor. These observations are consistent with the proposed chaperone/coat protein complex II exchange model. This posits that cytosolic HSP proteins are sequentially recruited to folding intermediates of the A2A receptor. Release of HSP90 is required prior to recruitment of coat protein complex II components. This prevents premature ER export of partially folded receptors.
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Affiliation(s)
- Christian Bergmayr
- From the Institute for Pharmacology, Center for Physiology and Pharmacology, Medical University of Vienna, Waehringerstrasse 13a, A-1090 Vienna, Austria
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Huang SH, Zhao LX, Hong C, Duo CC, Guo BN, Zhang LJ, Gong Z, Xiong SD, Gong FY, Gao XM. Self-oligomerization is essential for enhanced immunological activities of soluble recombinant calreticulin. PLoS One 2013; 8:e64951. [PMID: 23762269 PMCID: PMC3677884 DOI: 10.1371/journal.pone.0064951] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 04/19/2013] [Indexed: 12/11/2022] Open
Abstract
We have recently reported that calreticulin (CRT), a luminal resident protein, can be found in the sera of patients with rheumatoid arthritis and also that recombinant CRT (rCRT) exhibits extraordinarily strong immunological activities. We herein further demonstrate that rCRT fragments 18-412 (rCRT/18-412), rCRT/39-272, rCRT/120-308 and rCRT/120-250 can self-oligomerize in solution and are 50-100 fold more potent than native CRT (nCRT, isolated from mouse livers) in activating macrophages in vitro. We narrowed down the active site of CRT to residues 150-230, the activity of which also depends on dimerization. By contrast, rCRT/18-197 is almost completely inactive. When rCRT/18-412 is fractionated into oligomers and monomers by gel filtration, the oligomers maintain most of their immunological activities in terms of activating macrophages in vitro and inducing specific antibodies in vivo, while the monomers were much less active by comparison. Additionally, rCRT/18-412 oligomers are much better than monomers in binding to, and uptake by, macrophages. Inhibition of macrophage endocytosis partially blocks the stimulatory effect of rCRT/18-412. We conclude that the immunologically active site of CRT maps between residues 198-230 and that soluble CRT could acquire potent immuno-pathological activities in microenvironments favoring its oligomerization.
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Affiliation(s)
- Shang-Hui Huang
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Li-Xiang Zhao
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Chao Hong
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Cui-Cui Duo
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Bing-Nan Guo
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Li-Juan Zhang
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Zheng Gong
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Si-Dong Xiong
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - Fang-Yuan Gong
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
- * E-mail: (XMG); (FYG)
| | - Xiao-Ming Gao
- Institute of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
- * E-mail: (XMG); (FYG)
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Margarucci L, Monti MC, Cassiano C, Mozzicafreddo M, Angeletti M, Riccio R, Tosco A, Casapullo A. Chemical proteomics-driven discovery of oleocanthal as an Hsp90 inhibitor. Chem Commun (Camb) 2013; 49:5844-6. [PMID: 23703283 DOI: 10.1039/c3cc41858h] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Hsp90, a key target in cancer therapy, has been identified as the main partner of oleocanthal, an olive oil bioactive compound. A combination of chemical and biological assays disclosed its mechanism of action at the molecular level.
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Affiliation(s)
- Luigi Margarucci
- Dipartimento di Farmacia, Università degli Studi di Salerno, Via Ponte don Melillo, 84084 Fisciano, Italy
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Tsai MJ, Hsu YL, Wu KY, Yang RC, Chen YJ, Yu HS, Kuo PL. Heat Effect Induces Production of Inflammatory Cytokines Through Heat Shock Protein 90 Pathway in Cornea Cells. Curr Eye Res 2013; 38:464-71. [DOI: 10.3109/02713683.2012.763103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Abstract
The specific self-association of proteins to form homodimers and higher order oligomers is an extremely common event in biological systems. In this chapter we review the prevalence of protein oligomerization and discuss the likely origins of this phenomenon. We also outline many of the functional advantages conferred by the dimerization or oligomerization of a wide range of different proteins and in a variety of biological roles, that are likely to have placed a selective pressure on biological systems to evolve and maintain homodimerization/oligomerization interfaces.
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Sodium arsenite dependent protein expression analysis on human embryonic carcinoma (NCCIT) cell line. Toxicol Lett 2011; 207:149-58. [DOI: 10.1016/j.toxlet.2011.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Revised: 09/01/2011] [Accepted: 09/02/2011] [Indexed: 01/23/2023]
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Shibata T, Kimura Y, Mukai A, Mori H, Ito S, Asaka Y, Oe S, Tanaka H, Takahashi T, Uchida K. Transthiocarbamoylation of proteins by thiolated isothiocyanates. J Biol Chem 2011; 286:42150-42161. [PMID: 21998322 DOI: 10.1074/jbc.m111.308049] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Isothiocyanates, membrane-permeable electrophiles that form adducts with thiols, have been suggested to have important medical benefits. Here we shed light on isothiocyanate-thiol conjugates and studied their electrophilic potential transferring an isothiocyanate moiety to cellular proteins. When we examined the effect of sulfhydryl molecules on cellular response induced by 6-methylsulfinylhexyl isothiocyanate (6-HITC), an analog of sulforaphane isolated from broccoli, we observed significant induction of heme oxygenase-1 by 6-HITC even in the presence of N-acetyl-L-cysteine or glutathione (GSH). In addition, the authentic 6-HITC-β-mercaptoethanol (6-HITC-ME) conjugate markedly up-regulated the enzyme expression, suggesting the electrophilic potential of thiolated isothiocyanates. To gain a chemical insight into the cellular response induced by thiolated isothiocyanates, we studied the occurrence of transthiocarbamoylation of sulfhydryl molecules by 6-HITC-ME and observed that, upon incubation of 6-HITC-ME with GSH, a single product corresponding to the GSH conjugate of 6-HITC was generated. To test the functional ability of thiolated isothiocyanates to thiocarbamoylate proteins in living cells, we designed a novel probe, combining an isothiocyanate-reactive group and an alkyne functionality, and revealed that the transthiocarbamoylation of proteins occurred in the cells upon exposure to 6-HITC-ME. The target of thiocarbamoylation included heat shock protein 90 β (Hsp90β), a chaperone ATPase of the Hsp90 family implicated in protein maturation and targeting. To identify the sites of the Hsp90β modification, we utilized nano-LC/MALDI-TOF MS/MS and suggested that a thiol group on the peptide containing Cys-521 reacted with 6-HITC, resulting in a covalent adduct in a 6-HITC-treated recombinant Hsp90β in vitro. The site-selective binding to Cys-521 was supported by in silico modeling. Further study on the thiocarbamoylation of Hsp90β suggested that the formation of 6-HITC-Hsp90β conjugate might cause activation of heat shock factor-1, rapidly signaling a potential heat shock response. These data suggest that thiolated isothiocyanates are an active metabolite that could contribute to cellular responses through transthiocarbamoylation of cellular proteins.
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Affiliation(s)
- Takahiro Shibata
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Yuuki Kimura
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Akihiro Mukai
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Hitoshi Mori
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Sohei Ito
- School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Yukio Asaka
- Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Sho Oe
- Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Hiroshi Tanaka
- Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Takashi Takahashi
- Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8552, Japan
| | - Koji Uchida
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan.
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Anderson JF, Siller E, Barral JM. The Neurodegenerative-Disease-Related Protein Sacsin Is a Molecular Chaperone. J Mol Biol 2011; 411:870-80. [DOI: 10.1016/j.jmb.2011.06.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Revised: 06/06/2011] [Accepted: 06/10/2011] [Indexed: 12/20/2022]
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Abstract
BACKGROUND The 90-kDa heat-shock proteins (Hsp90) have rapidly evolved into promising therapeutic targets for the treatment of several diseases, including cancer and neurodegenerative diseases. Hsp90 is a molecular chaperone that aids in the conformational maturation of nascent polypeptides, as well as the rematuration of denatured proteins. DISCUSSION Many of the Hsp90-dependent client proteins are associated with cellular growth and survival and, consequently, inhibition of Hsp90 represents a promising approach for the treatment of cancer. Conversely, stimulation of heat-shock protein levels has potential therapeutic applications for the treatment of neurodegenerative diseases that result from misfolded and aggregated proteins. CONCLUSION Hsp90 modulation exhibits the potential to treat unrelated disease states, from cancer to neurodegenerative diseases, and, thus, to fold or not to fold, becomes a question of great value.
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Abstract
Background The human 90-kDa heat shock protein (HSP90) functions as a dimeric molecular chaperone. HSP90 identified on the cell surface has been found to play a crucial role in cancer invasion and metastasis, and has become a validated anti-cancer target for drug development. It has been shown to self-assemble into oligomers upon heat shock or divalent cations treatment, but the functional role of the oligomeric states in the chaperone cycle is not fully understood. Principal Findings Here we report the crystal structure of a truncated HSP90 that contains the middle segment and the carboxy-terminal domain, termed MC-HSP90. The structure reveals an architecture with triangular bipyramid geometry, in which the building block of the hexameric assembly is a dimer. In solution, MC-HSP90 exists in three major oligomer states, namely dimer, tetramer and hexamer, which were elucidated by size exclusion chromatography and analytical ultracentrifugation. The newly discovered HSP90 isoform HSP90N that lacks the N-terminal ATPase domain also exhibited similar oligomerization states as did MC-HSP90. Conclusions While lacking the ATPase domain, both MC-HSP90 and HSP90N can self-assemble into a hexameric structure, spontaneously. The crystal structure of MC-HSP90 reveals that, in addition to the C-terminal dimerization domain, the residue W320 in the M domain plays a critical role in its oligomerization. This study not only demonstrates how the human MC-HSP90 forms a hexamer, but also justifies the similar formation of HSP90N by using 3D modeling analysis.
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Zhao H, Donnelly AC, Kusuma BR, Brandt GEL, Brown D, Rajewski RA, Vielhauer G, Holzbeierlein J, Cohen MS, Blagg BSJ. Engineering an antibiotic to fight cancer: optimization of the novobiocin scaffold to produce anti-proliferative agents. J Med Chem 2011; 54:3839-53. [PMID: 21553822 DOI: 10.1021/jm200148p] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Development of the DNA gyrase inhibitor, novobiocin, into a selective Hsp90 inhibitor was accomplished through structural modifications to the amide side chain, coumarin ring, and sugar moiety. These species exhibit ∼700-fold improved anti-proliferative activity versus the natural product as evaluated by cellular efficacies against breast, colon, prostate, lung, and other cancer cell lines. Utilization of structure-activity relationships established for three novobiocin synthons produced optimized scaffolds, which manifest midnanomolar activity against a panel of cancer cell lines and serve as lead compounds that manifest their activities through Hsp90 inhibition.
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Affiliation(s)
- Huiping Zhao
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS 66045-7563, USA
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Cyclic lipopeptide antibiotics bind to the N-terminal domain of the prokaryotic Hsp90 to inhibit the chaperone activity. Biochem J 2011; 435:237-46. [DOI: 10.1042/bj20100743] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chemical arrays were employed to screen ligands for HtpG, the prokaryotic homologue of Hsp (heat-shock protein) 90. We found that colistins and the closely related polymyxin B interact physically with HtpG. They bind to the N-terminal domain of HtpG specifically without affecting its ATPase activity. The interaction caused inhibition of chaperone function of HtpG that suppresses thermal aggregation of substrate proteins. Further studies were performed with one of these cyclic lipopeptide antibiotics, colistin sulfate salt. It inhibited the chaperone function of the N-terminal domain of HtpG. However, it inhibited neither the chaperone function of the middle domain of HtpG nor that of other molecular chaperones such as DnaK, the prokaryotic homologue of Hsp70, and small Hsp. The addition of colistin sulfate salt increased surface hydrophobicity of the N-terminal domain of HtpG and induced oligomerization of HtpG and its N-terminal domain. These structural changes are discussed in relation to the inhibition of the chaperone function.
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Shim HY, Quan X, Yi YS, Jung G. Heat shock protein 90 facilitates formation of the HBV capsid via interacting with the HBV core protein dimers. Virology 2011; 410:161-9. [DOI: 10.1016/j.virol.2010.11.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2010] [Revised: 09/26/2010] [Accepted: 11/06/2010] [Indexed: 11/24/2022]
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Fisher JW, Sarkar S, Buchanan CF, Szot CS, Whitney J, Hatcher HC, Torti SV, Rylander CG, Rylander MN. Photothermal response of human and murine cancer cells to multiwalled carbon nanotubes after laser irradiation. Cancer Res 2010; 70:9855-64. [PMID: 21098701 DOI: 10.1158/0008-5472.can-10-0250] [Citation(s) in RCA: 187] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This study demonstrates the capability of multiwalled carbon nanotubes (MWNTs) coupled with laser irradiation to enhance treatment of cancer cells through enhanced and more controlled thermal deposition, increased tumor injury, and diminished heat shock protein (HSP) expression. We also explored the potential promise of MWNTs as drug delivery agents by observing the degree of intracellular uptake of these nanoparticles. To determine the heat generation capability of MWNTs, the absorption spectra and temperature rise during heating were measured. Higher optical absorption was observed for MWNTs in water compared with water alone. For identical laser parameters, MWNT-containing samples produced a significantly greater temperature elevation compared to samples treated with laser alone. Human prostate cancer (PC3) and murine renal carcinoma (RENCA) cells were irradiated with a 1,064-nm laser with an irradiance of 15.3 W/cm(2) for 2 heating durations (1.5 and 5 minutes) alone or in combination with MWNT inclusion. Cytotoxicity and HSP expression following laser heating was used to determine the efficacy of laser treatment alone or in combination with MWNTs. No toxicity was observed for MWNTs alone. Inclusion of MWNTs dramatically decreased cell viability and HSP expression when combined with laser irradiation. MWNT cell internalization was measured using fluorescence and transmission electron microscopy following incubation of MWNTs with cells. With increasing incubation duration, a greater number of MWNTs were observed in cellular vacuoles and nuclei. These findings offer an initial proof of concept for the application of MWNTs in cancer therapy.
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Affiliation(s)
- Jessica W Fisher
- School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia, USA
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Song X, Wang X, Zhuo W, Shi H, Feng D, Sun Y, Liang Y, Fu Y, Zhou D, Luo Y. The regulatory mechanism of extracellular Hsp90{alpha} on matrix metalloproteinase-2 processing and tumor angiogenesis. J Biol Chem 2010; 285:40039-49. [PMID: 20937816 DOI: 10.1074/jbc.m110.181941] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Heat shock protein 90α (Hsp90α) is a ubiquitously expressed molecular chaperone that is essential for eukaryotic homeostasis. Hsp90α can also be secreted extracellularly, where it has been shown to be involved in tumor metastasis. Extracellular Hsp90α interacts with and promotes the proteolytic activity of matrix metalloproteinase-2 (MMP-2). However, the regulatory mechanism of Hsp90α on MMP-2 activity is still unknown. Here we show that Hsp90α stabilizes MMP-2 and protects it from degradation in tumor cells. Further investigation reveals that this stabilization effect is isoform-specific, ATP-independent, and mediated by the interaction between the Hsp90α middle domain and the MMP-2 C-terminal hemopexin domain. Moreover, this mechanism also applies to endothelial cells that secrete more Hsp90α in their proliferating status. Furthermore, endothelial cell transmigration, Matrigel plug, and tumor angiogenesis assays demonstrate that extracellular Hsp90α promotes angiogenesis in an MMP-2-dependent manner. In sum, this study provides new insights into the molecular mechanism of how Hsp90α regulates its extracellular client proteins and also reveals for the first time the function of extracellular Hsp90α in promoting tumor angiogenesis.
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Affiliation(s)
- Xiaomin Song
- National Engineering Laboratory for Anti-tumor Protein Therapeutics, School of Life Sciences, Tsinghua University, Beijing 100084, China
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Wayne N, Bolon DN. Charge-rich regions modulate the anti-aggregation activity of Hsp90. J Mol Biol 2010; 401:931-9. [PMID: 20615417 DOI: 10.1016/j.jmb.2010.06.066] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 06/25/2010] [Accepted: 06/30/2010] [Indexed: 01/16/2023]
Abstract
Protein aggregation can have dramatic effects on cellular function and plays a causative role in many human diseases. In all cells, molecular chaperones bind to aggregation-prone proteins and hinder aggregation. The ability of a protein to resist aggregation and remain soluble in aqueous solution is linked to the physical properties of the protein. Numerous physical studies demonstrate that charged atoms favor solubility. We note that many molecular chaperones possess a substantial negative charge that may allow them to impart solubility on aggregation-prone proteins. Hsp90 is one such negatively charged molecular chaperone. The charge on Hsp90 is largely concentrated in two highly acidic regions. To investigate the relationship between chaperone charge and protein solubility, we deleted these charge-rich regions and analyzed the resulting Hsp90 constructs for anti-aggregation activity. We found that deletion of both charge-rich regions dramatically impaired Hsp90 anti-aggregation activity. The anti-aggregation role of the deleted charge-rich regions could be due to net charge or sequence-specific features. To distinguish these possibilities, we attached an acid-rich region with a distinct amino acid sequence to our double-deleted Hsp90 construct. This charge rescue construct displayed effective anti-aggregation activity indicating that the net charge of Hsp90 contributes to its anti-aggregation activity.
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Affiliation(s)
- Natalie Wayne
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, LRB922, 364 Plantation Street, Worcester, MA 01605, USA
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Sankhala RS, Swamy MJ. The Major Protein of Bovine Seminal Plasma, PDC-109, Is a Molecular Chaperone. Biochemistry 2010; 49:3908-18. [DOI: 10.1021/bi100051d] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
| | - Musti J. Swamy
- School of Chemistry, University of Hyderabad, Hyderabad-500046, India
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43
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Moullintraffort L, Bruneaux M, Nazabal A, Allegro D, Giudice E, Zal F, Peyrot V, Barbier P, Thomas D, Garnier C. Biochemical and biophysical characterization of the Mg2+-induced 90-kDa heat shock protein oligomers. J Biol Chem 2010; 285:15100-15110. [PMID: 20228408 DOI: 10.1074/jbc.m109.094698] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The 90-kDa heat shock protein (Hsp90) is involved in the regulation and activation of numerous client proteins essential for diverse functions such as cell growth and differentiation. Although the function of cytosolic Hsp90 is dependent on a battery of cochaperone proteins regulating both its ATPase activity and its interaction with client proteins, little is known about the real Hsp90 molecular mechanism. Besides its highly flexible dimeric state, Hsp90 is able to self-oligomerize in the presence of divalent cations or under heat shock. In addition to dimers, oligomers exhibit a chaperone activity. In this work, we focused on Mg(2+)-induced oligomers that we named Type I, Type II, and Type III in increasing molecular mass order. After stabilization of these quaternary structures, we optimized a purification protocol. Combining analytical ultracentrifugation, size exclusion chromatography coupled to multiangle laser light scattering, and high mass matrix-assisted laser desorption/ionization time of flight mass spectrometry, we determined biochemical and biophysical characteristics of each Hsp90 oligomer. We demonstrate that Type I oligomer is a tetramer, and Type II is an hexamer, whereas Type III is a dodecamer. These even-numbered structures demonstrate that the building brick for oligomerization is the dimer up to the Type II, whereas Type III probably results from the association of two Type II. Moreover, the Type II oligomer structure, studied by negative stain transmission electron microscopy tomography, exhibits a "nest-like" shape that forms a "cozy chaperoning chamber" where the client protein folding/protection could occur.
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Affiliation(s)
- Laura Moullintraffort
- Structure et Dynamique des Macromolecules, UMR-CNRS 6026, Université de Rennes 1, 35042 Rennes Cedex France
| | - Matthieu Bruneaux
- Equipe Ecophysiologie des Invertébrés Marins des Milieux Extrêmes, Université Pierre et Marie Curie Paris VI, CNRS UMR 7144, Station Biologique de Roscoff, B.P. 74, 29682 Roscoff, France
| | | | - Diane Allegro
- CRO2 UMR Inserm 911, Université de la Méditerranée, Faculté de Pharmacie, 13385 Marseille Cedex 5, France
| | - Emmanuel Giudice
- Structure et Dynamique des Macromolecules, UMR-CNRS 6026, Université de Rennes 1, 35042 Rennes Cedex France
| | - Franck Zal
- Equipe Ecophysiologie des Invertébrés Marins des Milieux Extrêmes, Université Pierre et Marie Curie Paris VI, CNRS UMR 7144, Station Biologique de Roscoff, B.P. 74, 29682 Roscoff, France
| | - Vincent Peyrot
- CRO2 UMR Inserm 911, Université de la Méditerranée, Faculté de Pharmacie, 13385 Marseille Cedex 5, France
| | | | - Daniel Thomas
- Structure et Dynamique des Macromolecules, UMR-CNRS 6026, Université de Rennes 1, 35042 Rennes Cedex France
| | - Cyrille Garnier
- Structure et Dynamique des Macromolecules, UMR-CNRS 6026, Université de Rennes 1, 35042 Rennes Cedex France.
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44
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Mays JR, Hill SA, Moyers JT, Blagg BSJ. The synthesis and evaluation of flavone and isoflavone chimeras of novobiocin and derrubone. Bioorg Med Chem 2010; 18:249-66. [PMID: 19932969 PMCID: PMC2818389 DOI: 10.1016/j.bmc.2009.10.061] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Revised: 10/28/2009] [Accepted: 10/29/2009] [Indexed: 01/07/2023]
Abstract
The natural products novobiocin and derrubone have both demonstrated Hsp90 inhibition and structure-activity relationships have been established for each scaffold. Given these compounds share several key structural features, we hypothesized that incorporation of elements from each could provide insight to structural features important for Hsp90 inhibition. Thus, chimeric analogues of novobiocin and derrubone were constructed and evaluated. These studies confirmed that the functionality present at the 3-position of the isoflavone plays a critical role in determining Hsp90 inhibition and suggests that the bicyclic ring system present in both novobiocin and derrubone do not share similar modes of binding.
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Affiliation(s)
- Jared R Mays
- Department of Medicinal Chemistry, 1251 Wescoe Hall Drive, Malott 4070, The University of Kansas, Lawrence, KS 66045-7563, United States
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45
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Barranco-Medina S, Dietz KJ. Thermodynamics of 2-Cys peroxiredoxin assembly determined by isothermal titration calorimetry. Methods Enzymol 2009; 466:409-30. [PMID: 21609870 DOI: 10.1016/s0076-6879(09)66017-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Oligomerization is a frequently encountered physical characteristic of biological molecules that occurs for a wide number of transcription factors, ion channels, oxygen-carrying macromolecules such as hemocyanin and enzymes. On the other hand, unwanted protein oligomerization can lead to the formation of pathogenic structures related with Alzheimer and other diseases. Self-assembly is also a well-described phenomenon within peroxiredoxins, a family of thiol peroxidases. Peroxiredoxin hyperaggregate formation is the key mechanism that triggers the switch between Prx activity as peroxidase and chaperone. The oligomerization process is fundamental for understanding the multiple peroxiredoxin function. The chapter gives a detailed description of typical 2-Cys Peroxiredoxin oligomerization using isothermal titration calorimetry (ITC) and provides a recipe for studying the thermodynamic parameters of peroxiredoxin assembly, that is, association and dissociation constant, enthalpy, entropy, and the Gibbs free energy of the process.
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46
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Wayne N, Lai Y, Pullen L, Bolon DN. Modular control of cross-oligomerization: analysis of superstabilized Hsp90 homodimers in vivo. J Biol Chem 2009; 285:234-41. [PMID: 19906642 DOI: 10.1074/jbc.m109.060129] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Homo-oligomeric proteins fulfill numerous functions in all cells. The ability to co-express subunits of these proteins that preferentially self-assemble without cross-oligomerizing provides for controlled experiments to analyze the function of mutant homo-oligomers in vivo. Hsp90 is a dimeric chaperone involved in the maturation of many kinases and steroid hormone receptors. We observed that co-expression of different Hsp90 subunits in Saccharomyces cerevisiae caused unpredictable synthetic growth defects due to cross-dimerization. We engineered superstabilized Hsp90 dimers that resisted cross-dimerization with endogenous Hsp90 and alleviated the synthetic growth defect. Superstabilized Hsp90 dimers supported robust growth of S. cerevisiae, indicating that dissociation of Hsp90 dimers could be hindered without compromising essential function. We utilized superstabilized dimers to analyze the activity of ATPase mutant homodimers in a temperature-sensitive yeast background where elevated temperature inactivated all other Hsp90 species. We found that ATP binding and hydrolysis by Hsp90 are both required for the efficient maturation of glucocorticoid receptor and v-Src, confirming the critical role of ATP hydrolysis in the maturation of steroid hormone receptors and kinases in vivo.
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Affiliation(s)
- Natalie Wayne
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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47
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Sano J, Kato KH. Localization and Copy Number of the Protein-Coding Genes Actin, α-Tubulin, and HSP90 in the Nucleus of a Primitive Dinoflagellate,Oxyrrhis marina. Zoolog Sci 2009; 26:745-53. [DOI: 10.2108/zsj.26.745] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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48
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Roodveldt C, Bertoncini CW, Andersson A, van der Goot AT, Hsu ST, Fernández-Montesinos R, de Jong J, van Ham TJ, Nollen EA, Pozo D, Christodoulou J, Dobson CM. Chaperone proteostasis in Parkinson's disease: stabilization of the Hsp70/alpha-synuclein complex by Hip. EMBO J 2009; 28:3758-70. [PMID: 19875982 DOI: 10.1038/emboj.2009.298] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 09/15/2009] [Indexed: 11/09/2022] Open
Abstract
The ATP-dependent protein chaperone heat-shock protein 70 (Hsp70) displays broad anti-aggregation functions and has a critical function in preventing protein misfolding pathologies. According to in vitro and in vivo models of Parkinson's disease (PD), loss of Hsp70 activity is associated with neurodegeneration and the formation of amyloid deposits of alpha-synuclein (alphaSyn), which constitute the intraneuronal inclusions in PD patients known as Lewy bodies. Here, we show that Hsp70 depletion can be a direct result of the presence of aggregation-prone polypeptides. We show a nucleotide-dependent interaction between Hsp70 and alphaSyn, which leads to the aggregation of Hsp70, in the presence of ADP along with alphaSyn. Such a co-aggregation phenomenon can be prevented in vitro by the co-chaperone Hip (ST13), and the hypothesis that it might do so also in vivo is supported by studies of a Caenorhabditis elegans model of alphaSyn aggregation. Our findings indicate that a decreased expression of Hip could facilitate depletion of Hsp70 by amyloidogenic polypeptides, impairing chaperone proteostasis and stimulating neurodegeneration.
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Affiliation(s)
- Cintia Roodveldt
- Department of Chemistry, University of Cambridge, Cambridge, UK.
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49
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Cha JY, Ermawati N, Jung MH, Su’udi M, Kim KY, Kim JY, Han CD, Lee KH, Son D. Characterization of orchardgrass p23, a flowering plant Hsp90 cohort protein. Cell Stress Chaperones 2009; 14:233-43. [PMID: 18800239 PMCID: PMC2728258 DOI: 10.1007/s12192-008-0077-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 08/18/2008] [Accepted: 08/20/2008] [Indexed: 12/26/2022] Open
Abstract
p23 is a heat shock protein 90 (Hsp90) co-chaperone and stabilizes the Hsp90 heterocomplex in mammals and yeast. In this study, we isolated a complementary DNA (cDNA) encoding p23 from orchardgrass (Dgp23) and characterized its functional roles under conditions of thermal stress. Dgp23 is a 911 bp cDNA with an open reading frame predicted to encode a 180 amino acid protein. Northern analysis showed that expression of Dgp23 transcripts was heat inducible. Dgp23 has a well-conserved p23 domain and interacted with an orchardgrass Hsp90 homolog in vivo, like mammalian and yeast p23 homologs. Recombinant Dgp23 is a small acidic protein with a molecular mass of approximately 27 kDa and pI 4.3. Dgp23 was also shown to function as a chaperone protein by suppression of malate dehydrogenase thermal aggregation. Differential scanning calorimetry thermograms indicated that Dgp23 is a heat-stable protein, capable of increasing the T (m) of lysozyme. Moreover, overexpression of Dgp23 in a yeast p23 homolog deletion strain, Deltasba1, increased cell viability. These results suggest that Dgp23 plays a role in thermal stress-tolerance and functions as a co-chaperone of Hsp90 and as a chaperone.
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Affiliation(s)
- Joon-Yung Cha
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Netty Ermawati
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Min Hee Jung
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Mukhamad Su’udi
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Ki-Yong Kim
- National Institute of Animal Science, RDA, Cheonan, 330-801 South Korea
| | - Jae-Yean Kim
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Chang-deok Han
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Kon Ho Lee
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
| | - Daeyoung Son
- Division of Applied Life Science (BK21 Program), Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
- Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 660-701 South Korea
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50
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Donnelly AC, Mays JR, Burlison JA, Nelson JT, Vielhauer G, Holzbeierlein J, Blagg BSJ. The design, synthesis, and evaluation of coumarin ring derivatives of the novobiocin scaffold that exhibit antiproliferative activity. J Org Chem 2008; 73:8901-20. [PMID: 18939877 DOI: 10.1021/jo801312r] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Novobiocin, a known DNA gyrase inhibitor, binds to a nucleotide-binding site located on the Hsp90 C-terminus and induces degradation of Hsp90-dependent client proteins at approximately 700 microM in breast cancer cells (SKBr3). Although many analogues of novobiocin have been synthesized, it was only recently demonstrated that monomeric species exhibit antiproliferative activity against various cancer cell lines. To further refine the essential elements of the coumarin core, a series of modified coumarin derivatives was synthesized and evaluated to elucidate structure-activity relationships for novobiocin as an anticancer agent. Results obtained from these studies have produced novobiocin analogues that manifest low micromolar activity against several cancer cell lines.
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Affiliation(s)
- Alison C Donnelly
- Department of Medicinal Chemistry, 1251 Wescoe Hall Drive, Malott 4070, The University of Kansas, Lawrence, Kansas 66045-7563, USA
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