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Lee C, Youn HJ, Lee SH, Kim J, Son D, Cha JY. Orchardgrass ACTIVATOR OF HSP90 ATPASE possesses autonomous chaperone properties and activates Hsp90 transcription to enhance thermotolerance. Biochem Biophys Res Commun 2022; 586:171-176. [PMID: 34856417 DOI: 10.1016/j.bbrc.2021.11.080] [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: 10/09/2021] [Accepted: 11/22/2021] [Indexed: 11/02/2022]
Abstract
High temperature stress is an environmental factor that negatively affects the growth and development of crops. Hsp90 (90 kDa heat shock protein) is a major molecular chaperone in eukaryotic cells, contributing to the maintenance of cell homeostasis through interaction with co-chaperones. Aha1 (activator of Hsp90 ATPase) is well known as a co-chaperone that activates ATPase activity of Hsp90 in mammals. However, biochemical and physiological evidence relating to Aha has not yet been identified in plants. In this study, we investigated the heat-tolerance function of orchardgrass (Dactylis glomerata L.) Aha (DgAha). Recombinant DgAha interacted with cytosolic DgHsp90s and efficiently protected substrates from thermal denaturation. Furthermore, heterologous expression of DgAha in yeast (Saccharomyces cerevisiae) cells and Arabidopsis (Arabidopsis thaliana) plants conferred thermotolerance in vivo. Enhanced expression of DgAha in Arabidopsis stimulates the transcription of Hsp90 under heat stress. Our data demonstrate that plant Aha plays a positive role in heat stress tolerance via chaperone properties and/or activation of Hsp90 to protect substrate proteins in plants from thermal injury.
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Affiliation(s)
- Changhoon Lee
- Department of Plant Medicine, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Ho Jin Youn
- Department of Plant Medicine, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Sang-Hoon Lee
- Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan, 31000, Republic of Korea
| | - Jinwoo Kim
- Department of Plant Medicine, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Daeyoung Son
- Department of Plant Medicine, Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, Republic of Korea.
| | - Joon-Yung Cha
- Research Institute of Life Sciences, Gyeongsang National University, Jinju, 52828, Republic of Korea.
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Cha JY, Lee SH, Seo KH, Choi YJ, Cheong MS, Son D. N-terminal arm of orchardgrass Hsp17.2 (DgHsp17.2) is essential for both in vitro chaperone activity and in vivo thermotolerance in yeast. Arch Biochem Biophys 2015; 591:18-27. [PMID: 26724757 DOI: 10.1016/j.abb.2015.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 12/14/2015] [Accepted: 12/22/2015] [Indexed: 11/27/2022]
Abstract
Small heat shock proteins are well-known to function as chaperone in the protection of proteins and subcellular structures against stress-induced denaturation in many cell compartments. Irrespective of such general functional assignment, a proof of function in a living organism is missing. Here, we used heat-induced orchardgrass small Hsp17.2 (DgHsp17.2). Its function in in vitro chaperone properties has shown in protecting the model substrate, malate dehydrogenase (MDH) and citrate synthase (CS). Overexpression of DgHsp17.2 triggering strong chaperone activity enhanced in vivo thermotolerance of yeast cells. To identify the functional domain on DgHsp17.2 and correlationship between in vitro chaperone property and in vivo thermotolerance, we generated truncation mutants of DgHsp17.2 and showed essentiality of the N-terminal arm of DgHsp17.2 for the chaperone function. In addition, beyond for acquisition of thermotolerance irrespective of sequences are diverse among the small Hsps. However, any truncation mutants of DgHsp17.2 did not exhibit strong interaction with orchardgrass heat shock protein 70 (DgHsp70) different from mature DgHsp17.2, indicating that full-length DgHsp17.2 is necessary for cooperating with Hsp70 protein. Our study indicates that the N-terminal arm of DgHsp17.2 is an important region for chaperone activity and thermotolerance.
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Affiliation(s)
- Joon-Yung Cha
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
| | - Sang-Hoon Lee
- Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 330-801, Republic of Korea.
| | - Kyung Hye Seo
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science, Eumsung 3369-873, Republic of Korea.
| | - Young Jin Choi
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
| | - Mi Sun Cheong
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
| | - Daeyoung Son
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea; Department of Plant Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea.
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Cha JY, Kim WY, Kang SB, Kim JI, Baek D, Jung IJ, Kim MR, Li N, Kim HJ, Nakajima M, Asami T, Sabir JSM, Park HC, Lee SY, Bohnert HJ, Bressan RA, Pardo JM, Yun DJ. A novel thiol-reductase activity of Arabidopsis YUC6 confers drought tolerance independently of auxin biosynthesis. Nat Commun 2015; 6:8041. [PMID: 26314500 PMCID: PMC4560777 DOI: 10.1038/ncomms9041] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 07/11/2015] [Indexed: 11/10/2022] Open
Abstract
YUCCA (YUC) proteins constitute a family of flavin monooxygenases (FMOs), with an important role in auxin (IAA) biosynthesis. Here we report that Arabidopsis plants overexpressing YUC6 display enhanced IAA-related phenotypes and exhibit improved drought stress tolerance, low rate of water loss and controlled ROS accumulation under drought and oxidative stresses. Co-overexpression of an IAA-conjugating enzyme reduces IAA levels but drought stress tolerance is unaffected, indicating that the stress-related phenotype is not based on IAA overproduction. YUC6 contains a previously unrecognized FAD- and NADPH-dependent thiol-reductase activity (TR) that overlaps with the FMO domain involved in IAA biosynthesis. Mutation of a conserved cysteine residue (Cys-85) preserves FMO but suppresses TR activity and stress tolerance, whereas mutating the FAD- and NADPH-binding sites, that are common to TR and FMO domains, abolishes all outputs. We provide a paradigm for a single protein playing a dual role, regulating plant development and conveying stress defence responses.
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Affiliation(s)
- Joon-Yung Cha
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Woe-Yeon Kim
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Sun Bin Kang
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Jeong Im Kim
- Department of Biochemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Dongwon Baek
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - In Jung Jung
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Mi Ri Kim
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Ning Li
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Hyun-Jin Kim
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Masatoshi Nakajima
- Department of Applied Biological Chemistry, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
| | - Tadao Asami
- Department of Applied Biological Chemistry, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan.,Department of Biochemistry, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia
| | - Jamal S M Sabir
- Biotechnology Research Group, Department of Biological Science, Faculty of Science, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia
| | - Hyeong Cheol Park
- Department of Ecological Adaptation, National Institute of Ecology, Seocheon 325-813, Republic of Korea
| | - Sang Yeol Lee
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Hans J Bohnert
- Biotechnology Research Group, Department of Biological Science, Faculty of Science, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia.,Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Ray A Bressan
- Biotechnology Research Group, Department of Biological Science, Faculty of Science, King Abdulaziz University, Jeddah 21589, Kingdom of Saudi Arabia.,Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, Indiana 47907, USA
| | - Jose M Pardo
- Instituto de Recursos Naturales y Agrobiologia, Consejo Superior de Investigaciones Cientificas, Sevilla 41012, Spain
| | - Dae-Jin Yun
- Division of Applied Life Science (BK21Plus), PMBBRC &IALS, Gyeongsang National University, Jinju 660-701, Republic of Korea
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Abstract
Hsp90 is a conserved molecular chaperone and is responsible for the folding and activation of several hundred client proteins, involved in various cellular processes. The large number and the diversity of these client proteins demand a high adaptiveness of Hsp90 towards the need of the individual client. This adaptiveness is amongst others mediated by more than 20 so-called cochaperones that differ in their actions towards Hsp90. Some of these cochaperones are able to modulate the ATPase activity of Hsp90 and/or its client protein binding, folding and activation. p23 and Aha1 are two prominent examples with opposing effects on the ATPase activity of Hsp90. p23 is able to inhibit the ATP turnover while Aha1 is the strongest known activator of the ATPase activity of Hsp90. Even though both cochaperones are conserved from yeast to man and have been studied for years, some Hsp90-related as well as Hsp90-independent functions are still enigmatic and under current investigation. In this chapter, we first introduce the ATPase cycle of Hsp90 and then focus on the two cochaperones integrating them in the Hsp90 cycle.
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Song H, Fan P, Shi W, Zhao R, Li Y. Expression of five AtHsp90 genes in Saccharomyces cerevisiae reveals functional differences of AtHsp90s under abiotic stresses. JOURNAL OF PLANT PHYSIOLOGY 2010; 167:1172-1178. [PMID: 20493581 DOI: 10.1016/j.jplph.2010.03.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 03/23/2010] [Accepted: 03/24/2010] [Indexed: 05/29/2023]
Abstract
The genome of Arabidopsis thaliana contains seven Hsp90 family genes. Three organellar and two cytosolic AtHsp90 isoforms were characterized by functionally expressing them in a temperature-sensitive Hsp90 mutant and a conditional Hsp90-null mutant of Saccharomyces cerevisiae. The cytosolic AtHsp90-1 and AtHsp90-2 showed function similar to that of yeast in chaperoning roles; they could support the growth of yeast mutants at both permissive and non-permissive temperature. Neither the full-length nor mature forms of chloroplast-located AtHsp90-5, mitochondria-located AtHsp90-6 and endoplasmic reticulum (ER)-located AtHsp90-7 could complement the yeast Hsp90 proteins. The cytosolic AtHsp90s could stabilize the biomembrane of the temperature-sensitive Hsp90 mutant strains under stress conditions, while the organellar AtHsp90s could not protect the biomembrane of the temperature-sensitive Hsp90 mutant strains. Yeast two-hybrid results showed that either pre-protein or mature forms of organellar AtHsp90s could interact with cofactors cpHsp70, Hsp70, Hsp70t-2, Cyp40, p23 and a substrate protein of NOS, while cytosolic AtHsp90s could not interact with them. These results suggest that organellar and cytosolic AtHsp90s possibly work through different molecular mechanisms in forming chaperone complexes and performing their functional roles.
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Affiliation(s)
- Hongmiao Song
- Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China
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Zhang Z, Sullivan W, Felts SJ, Prasad BD, Toft DO, Krishna P. Characterization of plant p23-like proteins for their co-chaperone activities. Cell Stress Chaperones 2010; 15:703-15. [PMID: 20349287 PMCID: PMC3006626 DOI: 10.1007/s12192-010-0182-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2009] [Revised: 02/19/2010] [Accepted: 02/22/2010] [Indexed: 12/26/2022] Open
Abstract
The small acidic protein p23 is best described as a co-chaperone of Hsp90, an essential molecular chaperone in eukaryotes. p23 binds to the ATP-bound form of Hsp90 and stabilizes the Hsp90-client protein complex by slowing down ATP turnover. The stabilizing activity of p23 was first characterized in studies of steroid receptor-Hsp90 complexes. Earlier studies of the Hsp90 chaperone complex in plants suggested that a p23-like stabilizing activity was absent in plant cell lysates. Here, we show that p23-like proteins are present in plants and are capable of binding Hsp90, but unlike human p23 and yeast ortholog Sba1, the plant p23-like proteins do not stabilize the steroid receptor-Hsp90 complexes formed in wheat germ lysate. Furthermore, these proteins do not inhibit the ATPase activity of plant Hsp90. While transcripts of Arabidopsis thaliana p23-1 and Atp23-2 were detected under normal growing conditions, those of the closely related Brassica napus p23-1 were present only after moderate heat stress. These observations suggest that p23-like proteins in plants are conserved in their binding to Hsp90 but have evolved mechanisms of action different from their yeast and animal counterparts.
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Affiliation(s)
- Zhongming Zhang
- Department of Biology, The University of Western Ontario, 1151 Richmond St. N., London, ON N6A 5B7 Canada
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070 China
| | - William Sullivan
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
| | - Sara J. Felts
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
| | - Bishun D. Prasad
- Department of Biology, The University of Western Ontario, 1151 Richmond St. N., London, ON N6A 5B7 Canada
| | - David O. Toft
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
| | - Priti Krishna
- Department of Biology, The University of Western Ontario, 1151 Richmond St. N., London, ON N6A 5B7 Canada
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Cha JY, Jung MH, Ermawati N, Su'udi M, Rho GJ, Han CD, Lee KH, Son D. Functional characterization of orchardgrass endoplasmic reticulum-resident Hsp90 (DgHsp90) as a chaperone and an ATPase. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2009; 47:859-866. [PMID: 19625192 DOI: 10.1016/j.plaphy.2009.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 05/02/2009] [Accepted: 06/18/2009] [Indexed: 05/28/2023]
Abstract
Hsp90 proteins are essential molecular chaperones regulating multiple cellular processes in distinct subcellular organelles. In this study, we report the functional characterization of a cDNA encoding endoplasmic reticulum (ER)-resident Hsp90 from orchardgrass (DgHsp90). DgHsp90 is a 2742bp cDNA with an open reading frame predicted to encode an 808 amino acid protein. DgHsp90 has a well conserved N-terminal ATPase domain and a C-terminal Hsp90 domain and ER-retention motif. Expression of DgHsp90 increased during heat stress at 35 degrees C or H(2)O(2) treatment. DgHsp90 also functions as a chaperone protein by preventing thermal aggregation of malate dehydrogenase (EC 1.1.1.37) and citrate synthase (EC 2.3.3.1). The intrinsic ATPase activity of DgHsp90 was inhibited by geldanamycin, an Hsp90 inhibitor, and the inhibition reduced the chaperone activity of DgHsp90. Yeast cells overexpressing DgHsp90 exhibited enhanced thermotolerance.
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Affiliation(s)
- Joon-Yung Cha
- Division of Applied Life Science (BK21 Program), Gyeongsang National University, Jinju 660-701, Republic of Korea
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