1
|
Zhai M, Ao Z, Qu H, Guo D. Overexpression of the potato VQ31 enhances salt tolerance in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2024; 15:1347861. [PMID: 38645398 PMCID: PMC11027747 DOI: 10.3389/fpls.2024.1347861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/18/2024] [Indexed: 04/23/2024]
Abstract
Plant-specific VQ proteins have crucial functions in the regulation of plant growth and development, as well as in plant abiotic stress responses. Their roles have been well established in the model plant Arabidopsis thaliana; however, the functions of the potato VQ proteins have not been adequately investigated. The VQ protein core region contains a short FxxhVQxhTG amino acid motif sequence. In this study, the VQ31 protein from potato was cloned and functionally characterized. The complete open reading frame (ORF) size of StVQ31 is 672 bp, encoding 223 amino acids. Subcellular localization analysis revealed that StVQ31 is located in the nucleus. Transgenic Arabidopsis plants overexpressing StVQ31 exhibited enhanced salt tolerance compared to wild-type (WT) plants, as evidenced by increased root length, germination rate, and chlorophyll content under salinity stress. The increased tolerance of transgenic plants was associated with increased osmotic potential (proline and soluble sugars), decreased MDA accumulation, decreased total protein content, and improved membrane integrity. These results implied that StVQ31 overexpression enhanced the osmotic potential of the plants to maintain normal cell growth. Compared to the WT, the transgenic plants exhibited a notable increase in antioxidant enzyme activities, reducing cell membrane damage. Furthermore, the real-time fluorescence quantitative PCR analysis demonstrated that StVQ31 regulated the expression of genes associated with the response to salt stress, including ERD, LEA4-5, At2g38905, and AtNCED3. These findings suggest that StVQ31 significantly impacts osmotic and antioxidant cellular homeostasis, thereby enhancing salt tolerance.
Collapse
Affiliation(s)
| | | | | | - Dongwei Guo
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China
| |
Collapse
|
2
|
Masoabi M, Burger NFV, Botha AM, Le Roux ML, Vlok M, Snyman S, Van der Vyver C. Overexpression of the Small Ubiquitin-Like Modifier protease OTS1 gene enhances drought tolerance in sugarcane (Saccharum spp. hybrid). PLANT BIOLOGY (STUTTGART, GERMANY) 2023; 25:1121-1141. [PMID: 37856570 DOI: 10.1111/plb.13585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 09/25/2023] [Indexed: 10/21/2023]
Abstract
Sugarcane is an economically important crop plant across the globe as it is the primary source of sugar and biofuel. Its growth and development are greatly influenced by water availability; therefore, in periods of water scarcity, yields are severely compromised. Small Ubiquitin-Like Modifier (SUMO) proteases play an important role in stress responses by regulating the SUMO-related post-translational modification of proteins. In an attempt to enhance drought tolerance in sugarcane, this crop was genetically transformed with a cysteine protease (OVERLY TOLERANT TO SALT-1; OTS1) from Arabidopsis thaliana using particle bombardment. Transgenic plants were analysed in terms of photosynthetic capacity, oxidative damage, antioxidant accumulation and the SUMO-enrich protein profile was assessed. Sugarcane transformed with the AtOTS1 gene displayed enhanced drought tolerance and delayed leaf senescence under water deficit compared to the untransformed wild type (WT). The AtOTS1 transgenic plants maintained a high relative moisture content and higher photosynthesis rate when compared to the WT. In addition, when the transgene was expressed at high levels, the transformed plants were able to maintain higher stomatal conductance and chlorophyl content under moderate stress compared to the WT. Under severe water deficit stress, the transgenic plants accumulated less malondialdehyde and maintained membrane integrity. SUMOylation of total protein and protease activity was lower in the AtOTS1 transformed plants compared to the WT, with several SUMO-enriched proteins exclusively expressed in the transgenics when exposed to water deficit stress. SUMOylation of proteins likely influenced various mechanisms contributing to enhanced drought tolerance in sugarcane.
Collapse
Affiliation(s)
- M Masoabi
- Institute for Plant Biotechnology, University of Stellenbosch, Stellenbosch, South Africa
| | - N F V Burger
- Department of Genetics, University of Stellenbosch, Stellenbosch, South Africa
| | - A-M Botha
- Department of Genetics, University of Stellenbosch, Stellenbosch, South Africa
| | - M L Le Roux
- Department of Genetics, University of Stellenbosch, Stellenbosch, South Africa
| | - M Vlok
- Mass Spectrometry Unit, Central Analytic Facility, Stellenbosch University, Stellenbosch, South Africa
| | - S Snyman
- South African Sugarcane Research Institute, Mount Edgecombe, South Africa
- School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - C Van der Vyver
- Institute for Plant Biotechnology, University of Stellenbosch, Stellenbosch, South Africa
| |
Collapse
|
3
|
Wang YX, Yu TF, Wang CX, Wei JT, Zhang SX, Liu YW, Chen J, Zhou YB, Chen M, Ma YZ, Lan JH, Zheng JC, Li F, Xu ZS. Heat shock protein TaHSP17.4, a TaHOP interactor in wheat, improves plant stress tolerance. Int J Biol Macromol 2023; 246:125694. [PMID: 37414309 DOI: 10.1016/j.ijbiomac.2023.125694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/30/2023] [Accepted: 07/02/2023] [Indexed: 07/08/2023]
Abstract
Adaptation to drought and salt stresses is a fundamental part of plant cell physiology and is of great significance for crop production under environmental stress. Heat shock proteins (HSPs) are molecular chaperones that play a crucial role in folding, assembling, translocating, and degrading proteins. However, their underlying mechanisms and functions in stress tolerance remain elusive. Here, we identified the HSP TaHSP17.4 in wheat by analyzing the heat stress-induced transcriptome. Further analysis showed that TaHSP17.4 was significantly induced under drought, salt, and heat stress treatments. Intriguingly, yeast-two-hybrid analysis showed that TaHSP17.4 interacts with the HSP70/HSP90 organizing protein (HOP) TaHOP, which plays a significant role in linking HSP70 and HSP90. We found that TaHSP17.4- and TaHOP-overexpressing plants have a higher proline content and a lower malondialdehyde content than wild-type plants under stress conditions and display strong tolerance to drought, salt, and heat stress. Additionally, qRT-PCR analysis showed that stress-responsive genes relevant to reactive oxygen species scavenging and abscisic acid signaling pathways were significantly induced in TaHSP17.4- and TaHOP-overexpressing plants under stress conditions. Together, our findings provide insight into HSP functions in wheat and two novel candidate genes for improvement of wheat varieties.
Collapse
Affiliation(s)
- Yi-Xuan Wang
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China; Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - Tai-Fei Yu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China; Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, the "Double-First Class" Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), Changsha Medical University, Changsha 410219, China
| | - Chun-Xiao Wang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - Ji-Tong Wei
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - Shuang-Xi Zhang
- Institute of Crop Science, Ningxia Academy of Agriculture and Forestry Sciences, Yongning 750105, China
| | - Yong-Wei Liu
- Institute of Biotechnology and Food Science, Hebei Academy of Agriculture and Forestry Sciences/Plant Genetic Engineering Center of Hebei Province, Shijiazhuang 050051, China
| | - Jun Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - Yong-Bin Zhou
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - Ming Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - You-Zhi Ma
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China
| | - Jin-Hao Lan
- College of Agronomy, Qingdao Agricultural University, Qingdao 266109, China
| | - Jia-Cheng Zheng
- Anhui Science and Technology University, College of Agronomy, Fengyang 233100, China
| | - Feng Li
- Hunan Provincial Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, the "Double-First Class" Application Characteristic Discipline of Hunan Province (Pharmaceutical Science), Changsha Medical University, Changsha 410219, China.
| | - Zhao-Shi Xu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences/Hainan Yazhou Bay Seed Laboratory, Sanya 572024, China.
| |
Collapse
|
4
|
Pascual S, Rodríguez-Álvarez CI, Kaloshian I, Nombela G. Hsp90 Gene Is Required for Mi-1-Mediated Resistance of Tomato to the Whitefly Bemisia tabaci. PLANTS (BASEL, SWITZERLAND) 2023; 12:641. [PMID: 36771723 PMCID: PMC9919380 DOI: 10.3390/plants12030641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
The Mi-1 gene of tomato (Solanum lycopersicum) confers resistance against some nematodes and insects, but the resistance mechanisms differ depending on the harmful organism, as a hypersensitive reaction (HR) occurs only in the case of nematodes. The gene Rme1 is required for Mi-1-mediated resistance to nematodes, aphids, and whiteflies, and several additional proteins also play a role in this resistance. Among them, the involvement of the chaperone HSP90 has been demonstrated in Mi-1-mediated resistance for aphids and nematodes, but not for whiteflies. In this work, we studied the implication of the Hsp90 gene in the Mi-1 resistance against the whitefly Bemisia tabaci by means of Tobacco rattle virus (TRV)-based virus-induced gene silencing (VIGS). The silencing of the Hsp90 gene in tomato Motelle plants carrying the Mi-1 gene resulted in a decrease in resistance to whiteflies, as oviposition values were significantly higher than those on non-silenced plants. This decrease in resistance was equivalent to that caused by the silencing of the Mi-1 gene itself. Infiltration with the control TRV vector did not alter Mi-1 mediated resistance to B. tabaci. Similar to the Mi-1 gene, silencing of Hsp90-1 occurs partially, as silenced plants showed a significant but not complete suppression of gene expression. Thus, our results demonstrate the requirement of Hsp90 in the Mi-1-mediated resistance to B. tabaci and reinforce the hypothesis of a common model for this resistance to nematodes and insects.
Collapse
Affiliation(s)
- Susana Pascual
- Entomology Group, Plant Protection Department, National Institute of Agricultural and Food Research and Technology (INIA), Spanish National Research Council (CSIC), Ctra. Coruña km 7, 28040 Madrid, Spain
| | - Clara I. Rodríguez-Álvarez
- Department of Plant Protection, Institute for Agricultural Sciences (ICA), Spanish National Research Council (CSIC), Serrano 115 Dpdo., 28006 Madrid, Spain
| | - Isgouhi Kaloshian
- Department of Nematology, University of California, Riverside, CA 92521, USA
| | - Gloria Nombela
- Department of Plant Protection, Institute for Agricultural Sciences (ICA), Spanish National Research Council (CSIC), Serrano 115 Dpdo., 28006 Madrid, Spain
| |
Collapse
|
5
|
Hsp70/Hsp90 Organising Protein (Hop): Coordinating Much More than Chaperones. Subcell Biochem 2023; 101:81-125. [PMID: 36520304 DOI: 10.1007/978-3-031-14740-1_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The Hsp70/Hsp90 organising protein (Hop, also known as stress-inducible protein 1/STI1/STIP1) has received considerable attention for diverse cellular functions in both healthy and diseased states. There is extensive evidence that intracellular Hop is a co-chaperone of the major chaperones Hsp70 and Hsp90, playing an important role in the productive folding of Hsp90 client proteins, although recent evidence suggests that eukaryotic Hop is regulatory within chaperone complexes rather than essential. Consequently, Hop is implicated in many key signalling pathways, including aberrant pathways leading to cancer. Hop is also secreted, and it is now well established that Hop interacts with the prion protein, PrPC, to mediate multiple signalling events. The intracellular and extracellular forms of Hop most likely represent two different isoforms, although the molecular determinants of these divergent functions are yet to be identified. There is also a growing body of research that reports the involvement of Hop in cellular activities that appear independent of either chaperones or PrPC. While the various cellular functions of Hop have been described, its biological function remains elusive. However, recent knockout studies in mammals suggest that Hop has an important role in embryonic development. This review provides a critical overview of the latest molecular, cellular and biological research on Hop, critically evaluating its function in healthy systems and how this function is adapted in diseased states.
Collapse
|
6
|
Muñoz A, Mangano S, Toribio R, Fernández‐Calvino L, del Pozo JC, Castellano MM. The co-chaperone HOP participates in TIR1 stabilisation and in auxin response in plants. PLANT, CELL & ENVIRONMENT 2022; 45:2508-2519. [PMID: 35610185 PMCID: PMC9541403 DOI: 10.1111/pce.14366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 04/13/2022] [Accepted: 05/15/2022] [Indexed: 05/25/2023]
Abstract
HOP (HSP70-HSP90 organising protein) is a conserved family of co-chaperones well known in mammals for its role in the folding of signalling proteins associated with development. In plants, HOP proteins have been involved in the response to multiple stresses, but their role in plant development remains elusive. Herein, we describe that the members of the HOP family participate in different aspects of plant development as well as in the response to warm temperatures through the regulation of auxin signalling. Arabidopsis hop1 hop2 hop3 triple mutant shows different auxin-related phenotypes and a reduced auxin sensitivity. HOP interacts with TIR1 auxin coreceptor in vivo. Furthermore, TIR1 accumulation and auxin transcriptional response are reduced in the hop1 hop2 hop3 triple mutant, suggesting that HOP's function in auxin signalling is related, at least, to TIR1 interaction and stabilisation. Interestingly, HOP proteins form part of the same complexes as SGT1b (a different HSP90 co-chaperone) and these co-chaperones synergistically cooperate in auxin signalling. This study provides relevant data about the role of HOP in auxin regulation in plants and uncovers that both co-chaperones, SGT1b and HOP, cooperate in the stabilisation of common targets involved in plant development.
Collapse
Affiliation(s)
- Alfonso Muñoz
- Centro de Biotecnología y Genómica de Plantas. Universidad Politécnica de Madrid (UPM) ‐ Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria‐CSIC (INIA/CSIC)Campus de Montegancedo UPMPozuelo de AlarcónMadridSpain
- Departamento de Botánica, Ecología y Fisiología VegetalUniversidad de Córdoba, Campus de RabanalesCórdobaSpain
| | - Silvina Mangano
- Centro de Biotecnología y Genómica de Plantas. Universidad Politécnica de Madrid (UPM) ‐ Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria‐CSIC (INIA/CSIC)Campus de Montegancedo UPMPozuelo de AlarcónMadridSpain
- Fundación Instituto Leloir and Instituto de Investigaciones Bioquímicas de Buenos Aires (IIBA, CONICET)Buenos AiresArgentina
| | - René Toribio
- Centro de Biotecnología y Genómica de Plantas. Universidad Politécnica de Madrid (UPM) ‐ Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria‐CSIC (INIA/CSIC)Campus de Montegancedo UPMPozuelo de AlarcónMadridSpain
| | - Lourdes Fernández‐Calvino
- Centro de Biotecnología y Genómica de Plantas. Universidad Politécnica de Madrid (UPM) ‐ Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria‐CSIC (INIA/CSIC)Campus de Montegancedo UPMPozuelo de AlarcónMadridSpain
| | - Juan C. del Pozo
- Centro de Biotecnología y Genómica de Plantas. Universidad Politécnica de Madrid (UPM) ‐ Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria‐CSIC (INIA/CSIC)Campus de Montegancedo UPMPozuelo de AlarcónMadridSpain
| | - M. Mar Castellano
- Centro de Biotecnología y Genómica de Plantas. Universidad Politécnica de Madrid (UPM) ‐ Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria‐CSIC (INIA/CSIC)Campus de Montegancedo UPMPozuelo de AlarcónMadridSpain
| |
Collapse
|
7
|
Genome-Wide Identification of Hsp90 Gene Family in Perennial Ryegrass and Expression Analysis under Various Abiotic Stresses. PLANTS 2021; 10:plants10112509. [PMID: 34834872 PMCID: PMC8622807 DOI: 10.3390/plants10112509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 11/29/2022]
Abstract
The heat shock protein 90 (Hsp90) is a protein produced in plants in response to stress. This study identified and analyzed Hsp90 gene family members in the perennial ryegrass genome. From the results, eight Hsp90 proteins were obtained and their MW, pI and number of amino acid bases varied. The amino acid bases ranged from 526 to 862. The CDS also ranged from 20 (LpHsp0-4) to 1 (LpHsp90-5). The least number of CDS regions was 1 (LpHsp90-5) with 528 kb amino acids, while the highest was 20 (LpHsp90-4) with 862 kb amino acids, which showed diversity among the protein sequences. The phylogenetic tree revealed that Hsp90 genes in Lolium perenne, Arabidopsis thaliana, Oryza sativa and Brachypodium distachyon could be divided into two groups with five paralogous gene pairs and three orthologous gene pairs. The expression analysis after perennial ryegrass was subjected to heat, salt, chromium (Cr), cadmium (Cd), polyethylene glycol (PEG) and abscisic acid (ABA) revealed that LpHsp90 genes were generally highly expressed under heat stress, but only two LpHsp90 proteins were expressed under Cr stresses. Additionally, the expression of the LpHsp90 proteins differed at each time point in all treatments. This study provides the basis for an understanding of the functions of LpHsp90 proteins in abiotic stress studies and in plant breeding.
Collapse
|
8
|
Abassi S, Wang H, Ki JS. Molecular cloning of heat shock protein 70 and HOP from the freshwater green algae Closterium ehrenbergii and their responses to stress. Cell Stress Chaperones 2020; 25:1117-1123. [PMID: 32794097 PMCID: PMC7591666 DOI: 10.1007/s12192-020-01143-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/07/2020] [Accepted: 07/22/2020] [Indexed: 10/23/2022] Open
Abstract
Heat shock proteins (HSPs) and HSP70-HSP90 organizing proteins (HOPs) are related, and they function together to maintain cellular homeostasis and respond to stress. In the present study, we reported the first molecular characteristics of HSP70 (designated as CeHSP70) and HOP (designated as CeHOP) genes from the freshwater green algae Closterium ehrenbergii and examined the changes in their expression profiles under heat stress and toxic chemicals treatment. CeHSP70 presented the conserved motif patterns and EEVD domain specific to cytosolic HSP70; CeHOP contained a typical domain of TPR repeats. Real-time PCR analysis showed that thermal stress considerably up-regulated both CeHOP and CeHSP70. In addition, the genes were significantly induced by CuCl2, CuSO4, and NiSO4, but not by K2Cr2O7, herbicide, and endocrine disrupting chemicals. These results suggest that CeHOP and CeHSP70 function together and play a role in responses to specific stressors and indicate their possible use as sensitive specific biomarkers in risk assessments.
Collapse
Affiliation(s)
- Sofia Abassi
- Department of Biotechnology, Sangmyung University, Seoul, 03016, South Korea
| | - Hui Wang
- Department of Biotechnology, Sangmyung University, Seoul, 03016, South Korea
| | - Jang-Seu Ki
- Department of Biotechnology, Sangmyung University, Seoul, 03016, South Korea.
| |
Collapse
|
9
|
Toribio R, Mangano S, Fernández-Bautista N, Muñoz A, Castellano MM. HOP, a Co-chaperone Involved in Response to Stress in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:591940. [PMID: 33193548 PMCID: PMC7658193 DOI: 10.3389/fpls.2020.591940] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/06/2020] [Indexed: 05/25/2023]
Abstract
Protein folding is an essential step for protein functionality. In eukaryotes this process is carried out by multiple chaperones that act in a cooperative manner to maintain the proteome homeostasis. Some of these chaperones are assisted during protein folding by different co-chaperones. One of these co-chaperones is HOP, the HSP70-HSP90 organizing protein. This assistant protein, due to its importance, has been deeply analyzed in other eukaryotes, but its function has only recently started to be envisaged in plants. In this kingdom, the role of HOP has been associated to plant response to different cellular, biotic and abiotic stresses. In this article, we analyze the current knowledge about HOP in eukaryotes, paying a special attention to the recently described roles of HOP in plants. In addition, we discuss the recent breakthroughs in the field and the possible new avenues for the study of plant HOP proteins in the future.
Collapse
Affiliation(s)
- René Toribio
- Centro de Biotecnología y Genómica de Plantas, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - Silvina Mangano
- Centro de Biotecnología y Genómica de Plantas, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - Nuria Fernández-Bautista
- Centro de Biotecnología y Genómica de Plantas, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - Alfonso Muñoz
- Departamento de Botánica, Ecología y Fisiología Vegetal, Universidad de Córdoba, Córdoba, Spain
| | - M. Mar Castellano
- Centro de Biotecnología y Genómica de Plantas, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Universidad Politécnica de Madrid (UPM), Madrid, Spain
| |
Collapse
|
10
|
Zia R, Nawaz MS, Siddique MJ, Hakim S, Imran A. Plant survival under drought stress: Implications, adaptive responses, and integrated rhizosphere management strategy for stress mitigation. Microbiol Res 2020; 242:126626. [PMID: 33189069 DOI: 10.1016/j.micres.2020.126626] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/06/2020] [Accepted: 10/10/2020] [Indexed: 12/25/2022]
Abstract
In many regions of the world, the incidence and extent of drought spells are predicted to increase which will create considerable pressure on global agricultural yields. Most likely among all the abiotic stresses, drought has the strongest effect on soil biota and plants along with complex environmental effects on other ecological systems. Plants being sessile appears the least resilient where drought creates osmotic stress, limits nutrient mobility due to soil heterogeneity, and reduces nutrient access to plant roots. Drought tolerance is a complex quantitative trait controlled by many genes and is one of the difficult traits to study and characterize. Nevertheless, existing studies on drought have indicated the mechanisms of drought resistance in plants on the morphological, physiological, and molecular basis and strategies have been devised to cope with the drought stress such as mass screening, breeding, marker-assisted selection, exogenous application of hormones or osmoprotectants and or engineering for drought resistance. These strategies have largely ignored the role of the rhizosphere in the plant's drought response. Studies have shown that soil microbes have a substantial role in modulation of plant response towards biotic and abiotic stress including drought. This response is complex and involves alteration in host root system architecture through hormones, osmoregulation, signaling through reactive oxygen species (ROS), induction of systemic tolerance (IST), production of large chain extracellular polysaccharides (EPS), and transcriptional regulation of host stress response genes. This review focuses on the integrated rhizosphere management strategy for drought stress mitigation in plants with a special focus on rhizosphere management. This combinatorial approach may include rhizosphere engineering by addition of drought-tolerant bacteria, nanoparticles, liquid nano clay (LNC), nutrients, organic matter, along with plant-modification with next-generation genome editing tool (e.g., CRISPR/Cas9) for quickly addressing emerging challenges in agriculture. Furthermore, large volumes of rainwater and wastewater generated daily can be smartly recycled and reused for agriculture. Farmers and other stakeholders will get a proper knowledge-exchange and an ideal road map to utilize available technologies effectively and to translate the measures into successful plant-water stress management. The proposed approach is cost-effective, eco-friendly, user-friendly, and will impart long-lasting benefits on agriculture and ecosystem and reduce vulnerability to climate change.
Collapse
Affiliation(s)
- Rabisa Zia
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Shoib Nawaz
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Jawad Siddique
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Sughra Hakim
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Asma Imran
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan.
| |
Collapse
|
11
|
Meena S, Deb S, Samtani H, Khurana P. Dissecting the Molecular Function of Triticum aestivum STI Family Members Under Heat Stress. Front Genet 2020; 11:873. [PMID: 32973870 PMCID: PMC7466592 DOI: 10.3389/fgene.2020.00873] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 07/16/2020] [Indexed: 11/15/2022] Open
Abstract
STI/HOP functions as a co-chaperone of HSP90 and HSP70 whose molecular function has largely been being restricted as an adaptor protein. However, its role in thermotolerance is not well explored. In this article, we have identified six members of the TaSTI family, which were named according to their distribution on group 2 and group 6 chromosomes. Interestingly, TaSTI-2 members were found to express higher as compared to TaSTI-6 members under heat stress conditions, with TaSTI-2A being one of the most heat-responsive member. Consistent with this, the heterologous expression of TaSTI-2A in Arabidopsis resulted in enhanced basal as well as acquired thermotolerance as revealed by the higher yield of the plants under stress conditions. Similarly in the case of rice, TaSTI-2A transgenics exhibited enhanced thermal tolerance. Moreover, we demonstrate that TaSTI-2A interacts with TaHSP90 not only in the nucleus but also in the ER and Golgi bodies, which has not been shown till now. Additionally, TaHSP70 was also found to interact with TaSTI-6D specifically in the cytosol. Thus, these data together suggested that the TaSTI family members might play different roles under heat stress conditions in order to fine-tune the heat stress response in plants.
Collapse
Affiliation(s)
- Shaloo Meena
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Sohini Deb
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Harsha Samtani
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | - Paramjit Khurana
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| |
Collapse
|
12
|
da Fonseca ACC, Matias D, Geraldo LHM, Leser FS, Pagnoncelli I, Garcia C, do Amaral RF, da Rosa BG, Grimaldi I, de Camargo Magalhães ES, Cóppola-Segovia V, de Azevedo EM, Zanata SM, Lima FRS. The multiple functions of the co-chaperone stress inducible protein 1. Cytokine Growth Factor Rev 2020; 57:73-84. [PMID: 32561134 DOI: 10.1016/j.cytogfr.2020.06.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/22/2020] [Accepted: 06/02/2020] [Indexed: 12/18/2022]
Abstract
Stress inducible protein 1 (STI1) is a co-chaperone acting with Hsp70 and Hsp90 for the correct client proteins' folding and therefore for the maintenance of cellular homeostasis. Besides being expressed in the cytosol, STI1 can also be found both in the cell membrane and the extracellular medium playing several relevant roles in the central nervous system (CNS) and tumor microenvironment. During CNS development, in association with cellular prion protein (PrPc), STI1 regulates crucial events such as neuroprotection, neuritogenesis, astrocyte differentiation and survival. In cancer, STI1 is involved with tumor growth and invasion, is undoubtedly a pro-tumor factor, being considered as a biomarker and possibly therapeutic target for several malignancies. In this review, we discuss current knowledge and new findings on STI1 function as well as its role in tissue homeostasis, CNS and tumor progression.
Collapse
Affiliation(s)
| | - Diana Matias
- Molecular Bionics Laboratory, Department of Chemistry, University College London, London, WC1H 0AJ, United Kingdom
| | - Luiz Henrique Medeiros Geraldo
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil; Université de Paris, PARCC, INSERM, Paris, 75015, France
| | - Felipe Saceanu Leser
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil
| | - Iohana Pagnoncelli
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil
| | - Celina Garcia
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil
| | - Rackele Ferreira do Amaral
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil
| | - Barbara Gomes da Rosa
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil
| | - Izabella Grimaldi
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil
| | - Eduardo Sabino de Camargo Magalhães
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil; European Research Institute for the Biology of Aging, University of Groningen, Groningen, 9713 AV, Netherlands
| | - Valentín Cóppola-Segovia
- Departments of Basic Pathology and Cell Biology, Federal University of Paraná, Paraná, RJ, 81531-970, Brazil
| | - Evellyn Mayla de Azevedo
- Departments of Basic Pathology and Cell Biology, Federal University of Paraná, Paraná, RJ, 81531-970, Brazil
| | - Silvio Marques Zanata
- Departments of Basic Pathology and Cell Biology, Federal University of Paraná, Paraná, RJ, 81531-970, Brazil
| | - Flavia Regina Souza Lima
- Glial Cell Biology Laboratory, Biomedical Sciences Institute, Federal University of Rio de Janeiro, Rio de Janeiro, 21949-590, Brazil.
| |
Collapse
|
13
|
Kausar S, Abbas MN, Yang L, Cui H. Biotic and abiotic stress induces the expression of Hsp70/90 organizing protein gene in silkworm, Bombyx mori. Int J Biol Macromol 2020; 143:610-618. [DOI: 10.1016/j.ijbiomac.2019.12.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 12/08/2019] [Accepted: 12/08/2019] [Indexed: 01/29/2023]
|
14
|
Expression pattern of heat shock protein 90AB (HSP90AB) and stress-inducible protein 1 (Stip1) during spermatogenesis of mudskipper Boleophthalmus pectinirostris. Comp Biochem Physiol B Biochem Mol Biol 2019; 231:42-51. [PMID: 30735774 DOI: 10.1016/j.cbpb.2019.01.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 01/26/2019] [Accepted: 01/28/2019] [Indexed: 12/17/2022]
Abstract
Heat shock protein 90 (HSP90), which functions as a molecular chaperone, plays an important role in reproduction and cellular defense. Among the HSP90 family, HSP90AB is an important isoform. Stress-inducible protein 1 (Stip1) acts as a co-chaperone that mediates interactions with HSP90 and appears to be a player in spermatogenesis and stress response. However, the functions of both HSP90 and Stip1 during spermatogenesis and heat stress response in Boleophthalmus pectinirostris remain unknown. We investigated mRNA expression patterns of HSP90AB and Stip1 under heat stress conditions. The results showed that mRNA levels of HSP90AB and Stip1 were significantly upregulated in the gill and liver tissues, indicating that HSP90AB and Stip1 appear to play roles in protection against heat stress. Then we cloned the complete cDNA of HSP90AB and Stip1, which have product lengths of 2546 and 2652 bp, respectively. The predicted secondary and tertiary structures of B. pectinirostris. HSP90AB and Stip1 contain conserved domains. We investigated the expression patterns of HSP90AB and Stip1 in different tissues by quantitative real-time polymerase chain reaction, HSP90AB and Stip1 were found to be ubiquitously expressed in all major tissues and exhibited varying expression levels, indicating that HSP90AB and Stip1 have conserved biological functions. HSP90AB and Stip1 were found to be strongly expressed in the testis, indicating their special roles in this organ. We also tracked the dynamic locations of germinal cells using in situ hybridization. Results from in situ hybridization and immunofluorescence localization showed that both mRNA transcripts and proteins of HSP90AB and Stip1 were ubiquitously expressed in spermatocytes, spermatids, and spermatozoa, indicating that HSP90AB and Stip1 are both involved in spermatogenesis.
Collapse
|
15
|
Zhai N, Jia H, Ma M, Chao Y, Guo X, Li H. Characteristics of AccSTIP1 in Apis cerana cerana and its role during oxidative stress responses. Cell Stress Chaperones 2018; 23:1165-1176. [PMID: 30128723 PMCID: PMC6237692 DOI: 10.1007/s12192-018-0920-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 05/21/2018] [Accepted: 05/24/2018] [Indexed: 10/28/2022] Open
Abstract
Various environmental stresses, such as heat shock, heavy metals, ultraviolet (UV) radiation and different pesticides, induce a cellular oxidative stress response. The cellular oxidative stress response is usually regulated by heat shock proteins (Hsps) acting as molecular chaperones. Stress-induced phosphoprotein 1 (STIP1), one of the most widely studied co-chaperones, functions as an adaptor that directs Hsp90 to Hsp70-client protein complexes. However, the biological functions of STIP1 remain poorly understood in honeybee (Apis cerana cerana). In this study, AccSTIP1 was identified in Apis cerana cerana. AccSTIP1 transcription was found to be induced by heat (42 °C), HgCl2, H2O2 and different pesticides (emamectin benzoate, thiamethoxam, hexythiazox and paraquat) and inhibited by CdCl2, UV and kresoxim-methyl. Moreover, western blot analysis indicated that the expression profiles of AccSTIP1 were consistent with its transcriptional expression levels. The disc diffusion assay showed that chemically competent transetta (DE3) bacteria expressing a recombinant AccSTIP1 protein displayed the smaller death zones than did control bacteria after exposure to paraquat and HgCl2. The DNA nicking assay suggested that recombinant purified AccSTIP1 protected supercoiled pUC19 plasmid DNA from damage caused by a thiol-dependent mixed-function oxidation (MFO) system. After knocking down AccSTIP1 gene expression via RNA interference (RNAi), the transcript levels of antioxidation-related genes were obviously lower in dsAccSTIP1 honeybees compared with those in the uninjected honeybees. Collectively, these results demonstrated that AccSTIP1 plays an important role in counteracting oxidative stress. This study lays a foundation for revealing the mechanism of AccSTIP1 in the Apis cerana cerana antioxidant system.
Collapse
Affiliation(s)
- Na Zhai
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Haihong Jia
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Manli Ma
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Yuzhen Chao
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Xingqi Guo
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China
| | - Han Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong, 271018, People's Republic of China.
| |
Collapse
|
16
|
Fernández-Bautista N, Fernández-Calvino L, Muñoz A, Toribio R, Mock HP, Castellano MM. HOP family plays a major role in long-term acquired thermotolerance in Arabidopsis. PLANT, CELL & ENVIRONMENT 2018; 41:1852-1869. [PMID: 29740845 DOI: 10.1111/pce.13326] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/19/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
HSP70-HSP90 organizing protein (HOP) is a family of cytosolic cochaperones whose molecular role in thermotolerance is quite unknown in eukaryotes and unexplored in plants. In this article, we describe that the three members of the AtHOP family display a different induction pattern under heat, being HOP3 highly regulated during the challenge and the attenuation period. Despite HOP3 is the most heat-regulated member, the analysis of the hop1 hop2 hop3 triple mutant demonstrates that the three HOP proteins act redundantly to promote long-term acquired thermotolerance in Arabidopsis. HOPs interact strongly with HSP90 and part of the bulk of HOPs shuttles from the cytoplasm to the nuclei and to cytoplasmic foci during the challenge. RNAseq analyses demonstrate that, although the expression of the Hsf targets is not generally affected, the transcriptional response to heat is drastically altered during the acclimation period in the hop1 hop2 hop3 triple mutant. This mutant also displays an unusual high accumulation of insoluble and ubiquitinated proteins under heat, which highlights the additional role of HOP in protein quality control. These data reveal that HOP family is involved in different aspects of the response to heat, affecting the plant capacity to acclimate to high temperatures for long periods.
Collapse
Affiliation(s)
- Nuria Fernández-Bautista
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón (Madrid), Spain
| | - Lourdes Fernández-Calvino
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón (Madrid), Spain
| | - Alfonso Muñoz
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón (Madrid), Spain
| | - René Toribio
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón (Madrid), Spain
| | - Hans P Mock
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Corrensstrasse 3, D-06466, Gatersleben, Germany
| | - M Mar Castellano
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón (Madrid), Spain
| |
Collapse
|
17
|
STIP1 is over-expressed in hepatocellular carcinoma and promotes the growth and migration of cancer cells. Gene 2018; 662:110-117. [DOI: 10.1016/j.gene.2018.03.076] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 03/13/2018] [Accepted: 03/26/2018] [Indexed: 12/12/2022]
|
18
|
Adão R, Zanphorlin LM, Lima TB, Sriranganadane D, Dahlström KM, Pinheiro GMS, Gozzo FC, Barbosa LRS, Ramos CHI. Revealing the interaction mode of the highly flexible Sorghum bicolor Hsp70/Hsp90 organizing protein (Hop): A conserved carboxylate clamp confers high affinity binding to Hsp90. J Proteomics 2018; 191:191-201. [PMID: 29425735 DOI: 10.1016/j.jprot.2018.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/02/2018] [Accepted: 02/04/2018] [Indexed: 12/27/2022]
Abstract
Proteostasis is dependent on the Hsp70/Hsp90 system (the two chaperones and their co-chaperones). Of these, Hop (Hsp70/Hsp90 organizing protein), also known as Sti1, forms an important scaffold to simultaneously binding to both Hsp70 and Hsp90. Hop/Sti1 has been implicated in several disease states, for instance cancer and transmissible spongiform encephalopathies. Therefore, human and yeast homologous have been better studied and information on plant homologous is still limited, even though plants are continuously exposed to environmental stress. Particularly important is the study of crops that are relevant for agriculture, such as Sorghum bicolor, a C4 grass that is among the five most important cereals and is considered as a bioenergy feedstock. To increase the knowledge on plant chaperones, the hop putative gene for Sorghum bicolor was cloned and the biophysical and structural characterization of the protein was done by cross-linking coupled to mass spectroscopy, small angle X-ray scattering and structural modeling. Additionally, the binding to a peptide EEVD motif, which is present in both Hsp70 and Hsp90, was studied by isothermal titration calorimetry and hydrogen/deuterium exchange and the interaction pattern structurally modeled. The results indicate SbHop as a highly flexible, mainly alpha-helical monomer consisting of nine tetratricopeptide repeat domains, of which one confers high affinity binding to Hsp90 through a conserved carboxylate clamp. Moreover, the present insights into the conserved interactions formed between Hop and Hsp90 can help to design strategies for potential therapeutic approaches for the diseases in which Hop has been implicated.
Collapse
Affiliation(s)
- Regina Adão
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Letícia M Zanphorlin
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Tatiani B Lima
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Dev Sriranganadane
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Käthe M Dahlström
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Glaucia M S Pinheiro
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Fabio C Gozzo
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | | | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas-UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil.
| |
Collapse
|
19
|
Lamm CE, Kraner ME, Hofmann J, Börnke F, Mock HP, Sonnewald U. Hop/Sti1 - A Two-Faced Cochaperone Involved in Pattern Recognition Receptor Maturation and Viral Infection. FRONTIERS IN PLANT SCIENCE 2017; 8:1754. [PMID: 29075278 PMCID: PMC5641557 DOI: 10.3389/fpls.2017.01754] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 09/25/2017] [Indexed: 05/03/2023]
Abstract
Perception of pathogens by host pattern recognition receptors (PRRs) or R proteins is a prerequisite to promote successful immune responses. The Hsp70/Hsp90 organizing protein Hop/Sti1, a multifunctional cochaperone, has been implicated in the maturation of a receptor-like kinase (RLK) necessary for chitin sensing. However, it remains unknown whether Hop/Sti1 is generally participating in PRR genesis. Using RNA-interference (RNAi), we silenced Hop/Sti1 expression in Nicotiana tabacum to gain further insight into the role of the cochaperone in plant defense responses. As expected, transgenic plants do not respond to chitin treatment anymore. In contrast to this, trafficking and functionality of the flagellin PRR FLS2 were unaltered, suggesting a selective involvement of Hop/Sti1 during PRR maturation. Furthermore, Hop/Sti1 was identified as a cellular determinant of Potato virus Y (PVY) symptom development in tobacco, since PVY was able to accumulate to near wild-type level without provoking the usual veinal necrosis phenotype. In addition, typical antiviral host defense responses were suppressed in the transgenic plants. These data suggest that perception of PVY is dependent on Hop/Sti1-mediated receptor maturation, while viral symptoms represent a failing attempt to restrict PVY spread. In addition, Hop/Sti1 colocalized with virus-induced membrane aggregates in wild-type plants. The retention of Hop/Sti1 in potential viral replication complexes suggests a role during viral translation/replication, explaining why RNAi-lines do not exhibit increased susceptibility to PVY. This study provides evidence for a dual role of Hop/Sti1 in PRR maturation and pathogen perception as well as in promoting viral proliferation.
Collapse
Affiliation(s)
- Christian E. Lamm
- Department of Biology, Division of Biochemistry, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Max. E. Kraner
- Department of Biology, Division of Biochemistry, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Jörg Hofmann
- Department of Biology, Division of Biochemistry, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| | - Frederik Börnke
- Leibniz Institute of Vegetable and Ornamental Crops, Großbeeren, Germany
| | - Hans-Peter Mock
- Leibniz Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany
| | - Uwe Sonnewald
- Department of Biology, Division of Biochemistry, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany
| |
Collapse
|
20
|
Fernández-Bautista N, Fernández-Calvino L, Muñoz A, Castellano MM. HOP3, a member of the HOP family in Arabidopsis, interacts with BiP and plays a major role in the ER stress response. PLANT, CELL & ENVIRONMENT 2017; 40:1341-1355. [PMID: 28155228 DOI: 10.1111/pce.12927] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 01/15/2017] [Indexed: 05/18/2023]
Abstract
HSP70-HSP90 organizing protein (HOP) is a well-studied family of cytosolic cochaperones. However, the possible role of HOP during the endoplasmic reticulum (ER) stress response and the identity of its interactors within the ER were not previously addressed in any eukaryote. We have demonstrated that Arabidopsis HOP3, whose function was not studied before, interacts in vivo with cytosolic HSP90 and HSP70, and, unexpectedly, with binding immunoglobulin protein (BiP), a HSP70 ER-resident protein. Although BiP lacks the domain described in other eukaryotes for HOP-HSP70 binding, it interacts with HOP3 through a non-canonical association to its nucleotide binding domain. Consistent with this interaction with BiP, HOP3 is partially localized at the ER. Moreover, HOP3 is induced both at transcript and protein levels by unfolded protein response (UPR) inducer agents by a mechanism dependent on inositol-requiring enzyme 1 (IRE1). Importantly, hop3 loss-of-function mutants show a reduction in pollen germination and a hypersensitive phenotype in the presence of ER stress inducer agents, a phenotype that is reverted by the addition of the chemical chaperone tauroursodeoxycholic acid (TUDCA). All these data demonstrate, for the first time in any eukaryote, a main role of HOP as an important regulator of the ER stress response, a process intimately linked in plants to important specific developmental programs and to environmental stress sensing and response.
Collapse
Affiliation(s)
- Nuria Fernández-Bautista
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón, Madrid, Spain
| | - Lourdes Fernández-Calvino
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón, Madrid, Spain
| | - Alfonso Muñoz
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón, Madrid, Spain
| | - M Mar Castellano
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223, Pozuelo de Alarcón, Madrid, Spain
| |
Collapse
|
21
|
Choudhary MK, Nomura Y, Shi H, Nakagami H, Somers DE. Circadian Profiling of the Arabidopsis Proteome Using 2D-DIGE. FRONTIERS IN PLANT SCIENCE 2016; 7:1007. [PMID: 27462335 PMCID: PMC4940426 DOI: 10.3389/fpls.2016.01007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 06/27/2016] [Indexed: 05/18/2023]
Abstract
Clock-generated biological rhythms provide an adaptive advantage to an organism, resulting in increased fitness and survival. To better elucidate the plant response to the circadian system, we surveyed protein oscillations in Arabidopsis seedlings under constant light. Using large-scale two-dimensional difference in gel electrophoresis (2D-DIGE) the abundance of more than 1000 proteins spots was reproducibly resolved quantified and profiled across a circadian time series. A comparison between phenol-extracted samples and RuBisCO-depleted extracts identified 71 and 40 rhythmically-expressed proteins, respectively, and between 30 and 40% of these derive from non-rhythmic transcripts. These included proteins influencing transcriptional regulation, translation, metabolism, photosynthesis, protein chaperones, and stress-mediated responses. The phasing of maximum expression for the cyclic proteins was similar for both datasets, with a nearly even distribution of peak phases across the time series. STRING clustering analysis identified two interaction networks with a notable number of oscillating proteins: plastid-based and cytosolic chaperones and 10 proteins involved in photosynthesis. The oscillation of the ABA receptor, PYR1/RCAR11, with peak expression near dusk adds to a growing body of evidence that intimately ties ABA signaling to the circadian system. Taken together, this study provides new insights into the importance of post-transcriptional circadian control of plant physiology and metabolism.
Collapse
Affiliation(s)
- Mani K. Choudhary
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and TechnologyPohang, South Korea
| | - Yuko Nomura
- Plant Proteomics Research Unit, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - Hua Shi
- Department of Molecular Genetics, Ohio State UniversityColumbus, OH, USA
| | - Hirofumi Nakagami
- Plant Proteomics Research Unit, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
| | - David E. Somers
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and TechnologyPohang, South Korea
- Department of Molecular Genetics, Ohio State UniversityColumbus, OH, USA
- *Correspondence: David E. Somers
| |
Collapse
|
22
|
DeBlasio SL, Johnson R, Sweeney MM, Karasev A, Gray SM, MacCoss MJ, Cilia M. Potato leafroll virus structural proteins manipulate overlapping, yet distinct protein interaction networks during infection. Proteomics 2015; 15:2098-112. [PMID: 25787689 DOI: 10.1002/pmic.201400594] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 02/08/2015] [Accepted: 03/16/2015] [Indexed: 01/20/2023]
Abstract
Potato leafroll virus (PLRV) produces a readthrough protein (RTP) via translational readthrough of the coat protein amber stop codon. The RTP functions as a structural component of the virion and as a nonincorporated protein in concert with numerous insect and plant proteins to regulate virus movement/transmission and tissue tropism. Affinity purification coupled to quantitative MS was used to generate protein interaction networks for a PLRV mutant that is unable to produce the read through domain (RTD) and compared to the known wild-type PLRV protein interaction network. By quantifying differences in the protein interaction networks, we identified four distinct classes of PLRV-plant interactions: those plant and nonstructural viral proteins interacting with assembled coat protein (category I); plant proteins in complex with both coat protein and RTD (category II); plant proteins in complex with the RTD (category III); and plant proteins that had higher affinity for virions lacking the RTD (category IV). Proteins identified as interacting with the RTD are potential candidates for regulating viral processes that are mediated by the RTP such as phloem retention and systemic movement and can potentially be useful targets for the development of strategies to prevent infection and/or viral transmission of Luteoviridae species that infect important crop species.
Collapse
Affiliation(s)
- Stacy L DeBlasio
- Boyce Thompson Institute for Plant Research, Ithaca, NY, USA.,USDA-Agricultural Research Service, Ithaca, NY, USA
| | - Richard Johnson
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | | | - Alexander Karasev
- Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, USA
| | - Stewart M Gray
- USDA-Agricultural Research Service, Ithaca, NY, USA.,Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca, NY, USA
| | - Michael J MacCoss
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Michelle Cilia
- Boyce Thompson Institute for Plant Research, Ithaca, NY, USA.,USDA-Agricultural Research Service, Ithaca, NY, USA.,Department of Plant Pathology and Plant-Microbe Biology, Cornell University, Ithaca, NY, USA
| |
Collapse
|
23
|
Hao P, Zhu J, Gu A, Lv D, Ge P, Chen G, Li X, Yan Y. An integrative proteome analysis of different seedling organs in tolerant and sensitive wheat cultivars under drought stress and recovery. Proteomics 2015; 15:1544-63. [DOI: 10.1002/pmic.201400179] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 11/09/2014] [Accepted: 12/18/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Pengchao Hao
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Jiantang Zhu
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Aiqin Gu
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Dongwen Lv
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Pei Ge
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Guanxing Chen
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Xiaohui Li
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Yueming Yan
- College of Life Science; Capital Normal University; Beijing P. R. China
- Hubei Collaborative Innovation Center for Grain Industry (HCICGI); Jingzhou P. R. China
| |
Collapse
|
24
|
Baindur-Hudson S, Edkins AL, Blatch GL. Hsp70/Hsp90 organising protein (hop): beyond interactions with chaperones and prion proteins. Subcell Biochem 2015; 78:69-90. [PMID: 25487016 DOI: 10.1007/978-3-319-11731-7_3] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The Hsp70/Hsp90 organising protein (Hop), also known as stress-inducible protein 1 (STI1), has received considerable attention for diverse cellular functions in both healthy and diseased states. There is extensive evidence that intracellular Hop is a co-chaperone of the major chaperones Hsp70 and Hsp90, playing an important role in the productive folding of Hsp90 client proteins. Consequently, Hop is implicated in a number of key signalling pathways, including aberrant pathways leading to cancer. However, Hop is also secreted and it is now well established that Hop also serves as a receptor for the prion protein, PrP(C). The intracellular and extracellular forms of Hop most likely represent two different isoforms, although the molecular determinants of these divergent functions are yet to be identified. There is also a growing body of research that reports the involvement of Hop in cellular activities that appear independent of either chaperones or PrP(C). While Hop has been shown to have various cellular functions, its biological function remains elusive. However, recent knockout studies in mammals suggest that Hop has an important role in embryonic development. This review provides a critical overview of the latest molecular, cellular and biological research on Hop, critically evaluating its function in healthy systems and how this function is adapted in diseases states.
Collapse
Affiliation(s)
- Swati Baindur-Hudson
- College of Health and Biomedicine, Victoria University, VIC 8001, Melbourne, Australia,
| | | | | |
Collapse
|
25
|
The hop-like stress-induced protein 1 cochaperone is a novel cell-intrinsic restriction factor for mitochondrial tombusvirus replication. J Virol 2014; 88:9361-78. [PMID: 24920799 DOI: 10.1128/jvi.00561-14] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
UNLABELLED Recent genome-wide screens reveal that the host cells express an arsenal of proteins that inhibit replication of plus-stranded RNA viruses by functioning as cell-intrinsic restriction factors of viral infections. One group of cell-intrinsic restriction factors against tombusviruses contains tetratricopeptide repeat (TPR) domains that directly interact with the viral replication proteins. In this paper, we find that the TPR domain-containing Hop-like stress-inducible protein 1 (Sti1p) cochaperone selectively inhibits the mitochondrial membrane-based replication of Carnation Italian ringspot tombusvirus (CIRV). In contrast, Sti1/Hop does not inhibit the peroxisome membrane-based replication of the closely related Tomato bushy stunt virus (TBSV) or Cucumber necrosis virus (CNV) in a yeast model or in plants. Deletion of STI1 in yeast leads to up to a 4-fold increase in CIRV replication, and knockdown of the orthologous Hop cochaperone in plants results in a 3-fold increase in CIRV accumulation. Overexpression of Sti1p derivatives in yeast reveals that the inhibitory function depends on the TPR1 domain known to interact with heat shock protein 70 (Hsp70), but not on the TPR2 domain interacting with Hsp90. In vitro CIRV replication studies based on isolated mitochondrial preparations and purified recombinant proteins has confirmed that Sti1p, similar to the TPR-containing Cyp40-like Cpr7p cyclophilin and the Ttc4 oncogene-like Cns1 cochaperone, is a strong inhibitor of CIRV replication. Sti1p interacts and colocalizes with the CIRV replication proteins in yeast. Our findings indicate that the TPR-containing Hop/Sti1 cochaperone could act as a cell-intrinsic virus restriction factor of the mitochondrial CIRV, but not against the peroxisomal tombusviruses in yeast and plants. IMPORTANCE The host cells express various cell-intrinsic restriction factors that inhibit the replication of plus-stranded RNA viruses. In this paper, the authors find that the Hop-like stress-inducible protein 1 (Sti1p) cochaperone selectively inhibits the mitochondrial membrane-based replication of Carnation Italian ringspot tombusvirus (CIRV) in yeast. Deletion of STI1 in yeast or knockdown of the orthologous Hop cochaperone in plants leads to increased CIRV replication. In addition, overexpression of Sti1p derivatives in yeast reveals that the inhibitory function depends on the TPR1 domain known to interact with heat shock protein 70 (Hsp70), but not on the TPR2 domain interacting with Hsp90. In vitro CIRV replication studies based on isolated mitochondrial preparations and purified recombinant proteins have confirmed that Sti1p is a strong inhibitor of CIRV replication. The authors' findings reveal that the Hop/Sti1 cochaperone could act as a cell-intrinsic restriction factor against the mitochondrial CIRV, but not against the related peroxisomal tombusviruses.
Collapse
|
26
|
Filonova A, Haemsch P, Gebauer C, Weisheit W, Wagner V. Protein disulfide isomerase 2 of Chlamydomonas reinhardtii is involved in circadian rhythm regulation. MOLECULAR PLANT 2013; 6:1503-17. [PMID: 23475997 DOI: 10.1093/mp/sst048] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Protein disulfide isomerases (PDIs) are known to play important roles in the folding of nascent proteins and in the formation of disulfide bonds. Recently, we identified a PDI from Chlamydomonas reinhardtii (CrPDI2) by a mass spectrometry approach that is specifically enriched by heparin affinity chromatography in samples taken during the night phase. Here, we show that the recombinant CrPDI2 is a redox-active protein. It is reduced by thioredoxin reductase and catalyzes itself the reduction of insulin chains and the oxidative refolding of scrambled RNase A. By immunoblots, we confirm a high-amplitude change in abundance of the heparin-bound CrPDI2 during subjective night. Interestingly, we find that CrPDI2 is present in protein complexes of different sizes at both day and night. Among three identified interaction partners, one (a 2-cys peroxiredoxin) is present only during the night phase. To study a potential function of CrPDI2 within the circadian system, we have overexpressed its gene. Two transgenic lines were used to measure the rhythm of phototaxis. In the transgenic strains, a change in the acrophase was observed. This indicates that CrPDI2 is involved in the circadian signaling pathway and, together with the night phase-specific interaction of CrPDI2 and a peroxiredoxin, these findings suggest a close coupling of redox processes and the circadian clock in C. reinhardtii.
Collapse
Affiliation(s)
- Anna Filonova
- Institute of General Botany and Plant Physiology, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | | | | | | | | |
Collapse
|
27
|
Genome-wide analysis of the Populus Hsp90 gene family reveals differential expression patterns, localization, and heat stress responses. BMC Genomics 2013; 14:532. [PMID: 23915275 PMCID: PMC3750472 DOI: 10.1186/1471-2164-14-532] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 07/30/2013] [Indexed: 11/21/2022] Open
Abstract
Background Members of the heat shock protein 90 (Hsp90) class of proteins are evolutionarily conserved molecular chaperones. They are involved in protein folding, assembly, stabilization, activation, and degradation in many normal cellular processes and under stress conditions. Unlike many other well-characterized molecular chaperones, Hsp90s play key roles in signal transduction, cell-cycle control, genomic silencing, and protein trafficking. However, no systematic analysis of genome organization, gene structure, and expression compendium has been performed in the Populus model tree genus to date. Results We performed a comprehensive analysis of the Populus Hsp90 gene family and identified 10 Populus Hsp90 genes, which were phylogenetically clustered into two major groups. Gene structure and motif composition are relatively conserved in each group. In Populus trichocarpa, we identified three paralogous pairs, among which the PtHsp90-5a/PtHsp90-5b paralogous pair might be created by duplication of a genome segment. Subcellular localization analysis shows that PtHsp90 members are localized in different subcellular compartments. PtHsp90-3 is localized both in the nucleus and in the cytoplasm, PtHsp90-5a and PtHsp90-5b are in chloroplasts, and PtHsp90-7 is in the endoplasmic reticulum (ER). Furthermore, microarray and semi-quantitative real-time RT-PCR analyses show that a number of Populus Hsp90 genes are differentially expressed upon exposure to various stresses. Conclusions The gene structure and motif composition of PtHsp90s are highly conserved among group members, suggesting that members of the same group may also have conserved functions. Microarray and RT-PCR analyses show that most PtHsp90s were induced by various stresses, including heat stress. Collectively, these observations lay the foundation for future efforts to unravel the biological roles of PtHsp90 genes.
Collapse
|
28
|
Li HB, Du YZ. Molecular cloning and characterization of an Hsp90/70 organizing protein gene from Frankliniella occidentalis (Insecta: Thysanoptera, Thripidae). Gene 2013; 520:148-55. [DOI: 10.1016/j.gene.2013.02.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 02/06/2013] [Accepted: 02/13/2013] [Indexed: 01/06/2023]
|
29
|
Cao F, Cheng H, Cheng S, Li L, Xu F, Yu W, Yuan H. Expression of selected Ginkgo biloba heat shock protein genes after cold treatment could be induced by other abiotic stress. Int J Mol Sci 2012; 13:5768-5788. [PMID: 22754330 PMCID: PMC3382825 DOI: 10.3390/ijms13055768] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 04/26/2012] [Accepted: 05/02/2012] [Indexed: 11/16/2022] Open
Abstract
Heat shock proteins (HSPs) play various stress-protective roles in plants. In this study, three HSP genes were isolated from a suppression subtractive hybridization (SSH) cDNA library of Ginkgo biloba leaves treated with cold stress. Based on the molecular weight, the three genes were designated GbHSP16.8, GbHSP17 and GbHSP70. The full length of the three genes were predicted to encode three polypeptide chains containing 149 amino acids (Aa), 152 Aa, and 657 Aa, and their corresponding molecular weights were predicted as follows: 16.67 kDa, 17.39 kDa, and 71.81 kDa respectively. The three genes exhibited distinctive expression patterns in different organs or development stages. GbHSP16.8 and GbHSP70 showed high expression levels in leaves and a low level in gynoecia, GbHSP17 showed a higher transcription in stamens and lower level in fruit. This result indicates that GbHSP16.8 and GbHSP70 may play important roles in Ginkgo leaf development and photosynthesis, and GbHSP17 may play a positive role in pollen maturation. All three GbHSPs were up-regulated under cold stress, whereas extreme heat stress only caused up-regulation of GbHSP70, UV-B treatment resulted in up-regulation of GbHSP16.8 and GbHSP17, wounding treatment resulted in up-regulation of GbHSP16.8 and GbHSP70, and abscisic acid (ABA) treatment caused up-regulation of GbHSP70 primarily.
Collapse
Affiliation(s)
- Fuliang Cao
- Economic Forest Germplasm Improvement and Comprehensive Utilization of Resources of Hubei Key Laboratory, Huanggang Normal University, Huanggang 438000, China; E-Mails: (H.C.); (L.L.); (F.X.)
- College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (F.C.); (S.C.); Tel./Fax: +86-713-8833599 (S.C.)
| | - Hua Cheng
- Economic Forest Germplasm Improvement and Comprehensive Utilization of Resources of Hubei Key Laboratory, Huanggang Normal University, Huanggang 438000, China; E-Mails: (H.C.); (L.L.); (F.X.)
- College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; E-Mail:
- College of Chemistry and life science, Huanggang Normal University, Huanggang 438000, China; E-Mail:
| | - Shuiyuan Cheng
- Economic Forest Germplasm Improvement and Comprehensive Utilization of Resources of Hubei Key Laboratory, Huanggang Normal University, Huanggang 438000, China; E-Mails: (H.C.); (L.L.); (F.X.)
- College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; E-Mail:
- College of Chemistry and life science, Huanggang Normal University, Huanggang 438000, China; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (F.C.); (S.C.); Tel./Fax: +86-713-8833599 (S.C.)
| | - Linling Li
- Economic Forest Germplasm Improvement and Comprehensive Utilization of Resources of Hubei Key Laboratory, Huanggang Normal University, Huanggang 438000, China; E-Mails: (H.C.); (L.L.); (F.X.)
- College of Chemistry and life science, Huanggang Normal University, Huanggang 438000, China; E-Mail:
| | - Feng Xu
- Economic Forest Germplasm Improvement and Comprehensive Utilization of Resources of Hubei Key Laboratory, Huanggang Normal University, Huanggang 438000, China; E-Mails: (H.C.); (L.L.); (F.X.)
| | - Wanwen Yu
- College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; E-Mail:
| | - Honghui Yuan
- College of Chemistry and life science, Huanggang Normal University, Huanggang 438000, China; E-Mail:
| |
Collapse
|
30
|
Li H, Hu T, Fu J. Identification of genes associated with adaptation to NaCl toxicity in perennial ryegrass (Lolium perenne L.). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 79:153-162. [PMID: 22277775 DOI: 10.1016/j.ecoenv.2011.12.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2011] [Revised: 12/20/2011] [Accepted: 12/24/2011] [Indexed: 05/31/2023]
Abstract
Perennial ryegrass (Lolium perenne L.) is a popular turfgrass species. To understand the molecular mechanisms of salinity tolerance, a suppression subtractive cDNA library was constructed for a salinity-tolerant ryegrass accession, with NaCl-treated (255 mM) plants as the tester. Differentially expressed cDNA fragments were cloned and screened. BLAST search revealed that 268 clones exhibited significant homologies to known genes. These genes could be categorized into 11 different functional groups, including metabolism, energy transfer, detoxification, compatible solute, cellular transport, transcription, signal transduction, etc. The salinity-regulated expression of selected genes was confirmed by RT-PCR analysis. The results suggested that these putatively salinity up-regulated genes may play a vital role in the salinity tolerance of perennial ryegrass. They can be used as candidate genes for creating stress-tolerant grasses and for understanding molecular mechanisms of plant adaptation to salinity stress.
Collapse
Affiliation(s)
- Huiying Li
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden/Wuhan Institute of Botany, Chinese Academy of Sciences, Lumo street, Wuhan 430074, Hubei, PR China
| | - Tao Hu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden/Wuhan Institute of Botany, Chinese Academy of Sciences, Lumo street, Wuhan 430074, Hubei, PR China
| | - Jinmin Fu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden/Wuhan Institute of Botany, Chinese Academy of Sciences, Lumo street, Wuhan 430074, Hubei, PR China.
| |
Collapse
|
31
|
Chen T, Zhu H, Ke D, Cai K, Wang C, Gou H, Hong Z, Zhang Z. A MAP kinase kinase interacts with SymRK and regulates nodule organogenesis in Lotus japonicus. THE PLANT CELL 2012; 24:823-38. [PMID: 22353370 PMCID: PMC3315249 DOI: 10.1105/tpc.112.095984] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 01/29/2012] [Accepted: 02/06/2012] [Indexed: 05/03/2023]
Abstract
The symbiosis receptor kinase, SymRK, is required for root nodule development. A SymRK-interacting protein (SIP2) was found to form protein complex with SymRK in vitro and in planta. The interaction between SymRK and SIP2 is conserved in legumes. The SIP2 gene was expressed in all Lotus japonicus tissues examined. SIP2 represents a typical plant mitogen-activated protein kinase kinase (MAPKK) and exhibited autophosphorylation and transphosphorylation activities. Recombinant SIP2 protein could phosphorylate casein and the Arabidopsis thaliana MAP kinase MPK6. SymRK and SIP2 could not use one another as a substrate for phosphorylation. Instead, SymRK acted as an inhibitor of SIP2 kinase when MPK6 was used as a substrate, suggesting that SymRK may serve as a negative regulator of the SIP2 signaling pathway. Knockdown expression of SIP2 via RNA interference (RNAi) resulted in drastic reduction of nodules formed in transgenic hairy roots. A significant portion of SIP2 RNAi hairy roots failed to form a nodule. In these roots, the expression levels of SIP2 and three marker genes for infection thread and nodule primordium formation were downregulated drastically, while the expression of two other MAPKK genes were not altered. These observations demonstrate an essential role of SIP2 in the early symbiosis signaling and nodule organogenesis.
Collapse
Affiliation(s)
- Tao Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hui Zhu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Danxia Ke
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Kai Cai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chao Wang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Honglan Gou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zonglie Hong
- Department of Plant, Soil, and Entomological Sciences and Program of Microbiology, Molecular Biology and Biochemistry, University of Idaho, Moscow, Idaho 83844-2339
| | - Zhongming Zhang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| |
Collapse
|
32
|
Fellerer C, Schweiger R, Schöngruber K, Soll J, Schwenkert S. Cytosolic HSP90 cochaperones HOP and FKBP interact with freshly synthesized chloroplast preproteins of Arabidopsis. MOLECULAR PLANT 2011; 4:1133-45. [PMID: 21596689 DOI: 10.1093/mp/ssr037] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Most chloroplast and mitochondrial proteins are synthesized in the cytosol of the plant cell and have to be imported into the organelles post-translationally. Molecular chaperones play an important role in preventing protein aggregation of freshly translated preproteins and assist in maintaining the preproteins in an import competent state. Preproteins can associate with HSP70, HSP90, and 14-3-3 proteins in the cytosol. In this study, we analyzed a large set of wheat germ-translated chloroplast preproteins with respect to their chaperone binding. Our results demonstrate that the formation of distinct 14-3-3 or HSP90 containing preprotein complexes is a common feature in post-translational protein transport in addition to preproteins that seem to interact solely with HSP70. We were able to identify a diverse and extensive class of preproteins as HSP90 substrates, thus providing a tool for the investigation of HSP90 client protein association. The analyses of chimeric HSP90 and 14-3-3 binding preproteins with exchanged transit peptides indicate an involvement of both the transit peptide and the mature part of the proteins, in HSP90 binding. We identified two partner components of the HSP90 cycle, which were present in the preprotein containing high-molecular-weight complexes, the HSP70/HSP90 organizing protein HOP, as well as the immunophilin FKBP73. The results establish chloroplast preproteins as a general class of HSP90 client proteins in plants using HOP and FKBP as novel cochaperones.
Collapse
Affiliation(s)
- Christine Fellerer
- Department of Biology I, Botany, Ludwig-Maximilians-Universität München, Grosshaderner Strasse 2-4, D-82152 Planegg-Martinsried, Germany
| | | | | | | | | |
Collapse
|
33
|
Schmidt JC, Soares MJ, Goldenberg S, Pavoni DP, Krieger MA. Characterization of TcSTI-1, a homologue of stress-induced protein-1, in Trypanosoma cruzi. Mem Inst Oswaldo Cruz 2011; 106:70-7. [PMID: 21340359 DOI: 10.1590/s0074-02762011000100012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 10/21/2010] [Indexed: 11/21/2022] Open
Abstract
The life cycle of the protozoan Trypanosoma cruzi exposes it to several environmental stresses in its invertebrate and vertebrate hosts. Stress conditions are involved in parasite differentiation, but little is known about the stress response proteins involved. We report here the first characterization of stress-induced protein-1 (STI-1) in T. cruzi (TcSTI-1). This co-chaperone is produced in response to stress and mediates the formation of a complex between the stress proteins HSP70 and HSP90 in other organisms. Despite the similarity of TcSTI-1 to STI-1 proteins in other organisms, its expression profile in response to various stress conditions, such as heat shock, acidic pH or nutrient starvation, is quite different. Neither polysomal mRNA nor protein levels changed in exponentially growing epimastigotes cultured under any of the stress conditions studied. Increased levels of TcSTI-1 were observed in epimastigotes subjected to nutritional stress in the late growth phase. Co-immunoprecipitation assays revealed an association between TcSTI-1 and TcHSP70 in T. cruzi epimastigotes. Immunolocalization demonstrated that TcSTI-1 was distributed throughout the cytoplasm and there was some colocalization of TcSTI-1 and TcHSP70 around the nucleus. Thus, TcSTI-1 associates with TcHSP70 and TcSTI-1 expression is induced when the parasites are subjected to stress conditions during specific growth phase.
Collapse
|
34
|
In silico identification of carboxylate clamp type tetratricopeptide repeat proteins in Arabidopsis and rice as putative co-chaperones of Hsp90/Hsp70. PLoS One 2010; 5:e12761. [PMID: 20856808 PMCID: PMC2939883 DOI: 10.1371/journal.pone.0012761] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2009] [Accepted: 07/16/2010] [Indexed: 11/19/2022] Open
Abstract
The essential eukaryotic molecular chaperone Hsp90 operates with the help of different co-chaperones, which regulate its ATPase activity and serve as adaptors to recruit client proteins and other molecular chaperones, such as Hsp70, to the Hsp90 complex. Several Hsp90 and Hsp70 co-chaperones contain the tetratricopeptide repeat (TPR) domain, which interacts with the highly conserved EEVD motif at the C-terminal ends of Hsp90 and Hsp70. The acidic side chains in EEVD interact with a subset of basic residues in the TPR binding pocket called a 'carboxylate clamp'. Since the carboxylate clamp residues are conserved in the TPR domains of known Hsp90/Hsp70 co-chaperones, we carried out an in silico search for TPR proteins in Arabidopsis and rice comprising of at least one three-motif TPR domain with conserved amino acid residues required for Hsp90/Hsp70 binding. This approach identified in Arabidopsis a total of 36 carboxylate clamp (CC)-TPR proteins, including 24 novel proteins, with potential to interact with Hsp90/Hsp70. The newly identified CC-TPR proteins in Arabidopsis and rice contain additional protein domains such as ankyrin, SET, octicosapeptide/Phox/Bem1p (Phox/PB1), DnaJ-like, thioredoxin, FBD and F-box, and protein kinase and U-box, indicating varied functions for these proteins. To provide proof-of-concept of the newly identified CC-TPR proteins for interaction with Hsp90, we demonstrated interaction of AtTPR1 and AtTPR2 with AtHsp90 in yeast two-hybrid and in vitro pull down assays. These findings indicate that the in silico approach used here successfully identified in a genome-wide context CC-TPR proteins with potential to interact with Hsp90/Hsp70, and further suggest that the Hsp90/Hsp70 system relies on TPR co-chaperones more than it was previously realized.
Collapse
|
35
|
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.
Collapse
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
| |
Collapse
|
36
|
Chen L, Hamada S, Fujiwara M, Zhu T, Thao NP, Wong HL, Krishna P, Ueda T, Kaku H, Shibuya N, Kawasaki T, Shimamoto K. The Hop/Sti1-Hsp90 chaperone complex facilitates the maturation and transport of a PAMP receptor in rice innate immunity. Cell Host Microbe 2010; 7:185-96. [PMID: 20227662 DOI: 10.1016/j.chom.2010.02.008] [Citation(s) in RCA: 145] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Revised: 01/14/2010] [Accepted: 02/19/2010] [Indexed: 01/22/2023]
Abstract
Recognition of pathogen-associated molecular patterns (PAMPs) by pattern recognition receptors (PRRs) represents a critical first step of innate defense in plants and animals. However, maturation and transport of PRRs are not well understood. We find that the rice chitin receptor OsCERK1 interacts with Hsp90 and its cochaperone Hop/Sti1 in the endoplasmic reticulum (ER). Hop/Sti1 and Hsp90 are required for efficient transport of OsCERK1 from the ER to the plasma membrane (PM) via a pathway dependent on Sar1, a small GTPase which regulates ER-to-Golgi trafficking. Further, Hop/Sti1 and Hsp90 are present at the PM in a complex (designated the "defensome") with OsRac1, a plant-specific Rho-type GTPase. Finally, Hop/Sti1 was required for chitin-triggered immunity and resistance to rice blast fungus. Our results suggest that the Hop/Sti1-Hsp90 chaperone complex plays an important and likely conserved role in the maturation and transport of PRRs and may function to link PRRs and Rac/Rop GTPases.
Collapse
Affiliation(s)
- Letian Chen
- Laboratory of Plant Molecular Genetics, Nara Institute of Science and Technology, Takayama, Ikoma, Japan
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Wagner V, Gessner G, Mittag M. Functional Proteomics: A Promising Approach to Find Novel Components of the Circadian System. Chronobiol Int 2009; 22:403-15. [PMID: 16076645 DOI: 10.1081/cbi-200062348] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In the postgenome era, the analysis of entire subproteomes in correlation with their function has emerged due to high throughput technologies. Early approaches have been initiated to identify novel components of the circadian system. For example, in the marine dinoflagellate Lingulodinium polyedra, a chronobiological proteome assay was performed, which resulted in the identification of already known circadian expressed proteins as well as novel temporal controlled proteins involved in metabolic pathways. In the green alga Chlamydomonas reinhardtii, two circadian expressed proteins (a protein disulfide isomerase and a tetratricopeptide repeat protein) were identified by functional proteomics. Also, the first hints of temporal control within chloroplast proteins of Arabidopsis thaliana were identified by proteome analysis.
Collapse
Affiliation(s)
- Volker Wagner
- Institut für Allgemeine Botanik, Friedrich-Schiller-Universität-Jena, Germany
| | | | | |
Collapse
|
38
|
Zou J, Liu A, Chen X, Zhou X, Gao G, Wang W, Zhang X. Expression analysis of nine rice heat shock protein genes under abiotic stresses and ABA treatment. JOURNAL OF PLANT PHYSIOLOGY 2009; 166:851-61. [PMID: 19135278 DOI: 10.1016/j.jplph.2008.11.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2008] [Revised: 11/04/2008] [Accepted: 11/04/2008] [Indexed: 05/03/2023]
Abstract
Expression profiles of nine rice heat shock protein genes (OsHSPs) were analyzed by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR). The nine genes exhibited distinctive expression in different organs. Expression of nine OsHSP genes was affected differentially by abiotic stresses and abscisic acid (ABA). All nine OsHSP genes were induced strongly by heat shock treatment, whereas none of them were induced by cold. The transcripts of OsHSP80.2, OsHSP71.1 and OsHSP23.7 were increased during salt tress treatment. Expression of OsHSP80.2 and OsHSP24.1 genes were enhanced while treated with 10% PEG. Only OsHSP71.1 was induced by ABA while OsHSP24.1 was suppressed by ABA. These observations imply that the nine OsHSP genes may play different roles in plant development and abiotic stress responses.
Collapse
Affiliation(s)
- Jie Zou
- Crop Gene Engineering Key Laboratory of Hunan Province, Hunan Agricultural University, Changsha 410128, China; College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | | | | | | | | | | | | |
Collapse
|
39
|
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.
Collapse
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
| |
Collapse
|
40
|
Hernández Torres J, Papandreou N, Chomilier J. Sequence analyses reveal that a TPR-DP module, surrounded by recombinable flanking introns, could be at the origin of eukaryotic Hop and Hip TPR-DP domains and prokaryotic GerD proteins. Cell Stress Chaperones 2009; 14:281-9. [PMID: 18987995 PMCID: PMC2728264 DOI: 10.1007/s12192-008-0083-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2008] [Accepted: 09/15/2008] [Indexed: 11/27/2022] Open
Abstract
The co-chaperone Hop [heat shock protein (HSP) organising protein] is known to bind both Hsp70 and Hsp90. Hop comprises three repeats of a tetratricopeptide repeat (TPR) domain, each consisting of three TPR motifs. The first and last TPR domains are followed by a domain containing several dipeptide (DP) repeats called the DP domain. These analyses suggest that the hop genes result from successive recombination events of an ancestral TPR-DP module. From a hydrophobic cluster analysis of homologous Hop protein sequences derived from gene families, we can postulate that shifts in the open reading frames are at the origin of the present sequences. Moreover, these shifts can be related to the presence or absence of biological function. We propose to extend the family of Hop co-chaperons into the kingdom of bacteria, as several structurally related genes have been identified by hydrophobic cluster analysis. We also provide evidence of common structural characteristics between hop and hip genes, suggesting a shared precursor of ancestral TPR-DP domains.
Collapse
Affiliation(s)
- Jorge Hernández Torres
- Laboratorio de Biología Molecular, Escuela de Biología, Universidad Industrial de Santander, Apartado Aéreo 678, Bucaramanga, Colombia.
| | | | | |
Collapse
|
41
|
Tian J, Belanger FC, Huang B. Identification of heat stress-responsive genes in heat-adapted thermal Agrostis scabra by suppression subtractive hybridization. JOURNAL OF PLANT PHYSIOLOGY 2009; 166:588-601. [PMID: 18950897 DOI: 10.1016/j.jplph.2008.09.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Revised: 09/03/2008] [Accepted: 09/04/2008] [Indexed: 05/27/2023]
Abstract
To gain insights into molecular mechanisms of grass tolerance to heat stress, we constructed a suppression subtractive cDNA library to identify heat-responsive genes for a C(3) grass species, thermal Agrostis scabra adapted to heat stress in geothermal areas in Yellowstone National Park. Plants were exposed to 20 degrees C (control) or 35 degrees C for 12d. The SSH analysis was performed with control samples as the driver and heat-stressed samples as the tester. Differentially expressed cDNA fragments were cloned to screen the heat up-regulated library. The SSH analysis identified 120 non-redundant putative heat-responsive cDNAs out of 1180 clones. Genes with homology to known proteins were categorized into six functional groups, with the largest group of genes involved in stress/defense, followed by the group of genes related to protein metabolism. Immunoblot analysis confirmed increases in transcripts of selected genes under heat stress. Transcripts of seven and eight genes were strongly enhanced or induced in shoots and roots, respectively, while two genes were only induced in roots under heat stress. The heat up-regulated genes in thermal A. scabra adapted to long-term heat stress are potential candidate genes for engineering stress-tolerant grasses and for revealing molecular mechanisms of grass adaptation to heat stress.
Collapse
Affiliation(s)
- Jiang Tian
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ 08901, USA
| | | | | |
Collapse
|
42
|
Zhu H, Chen T, Zhu M, Fang Q, Kang H, Hong Z, Zhang Z. A novel ARID DNA-binding protein interacts with SymRK and is expressed during early nodule development in Lotus japonicus. PLANT PHYSIOLOGY 2008; 148:337-47. [PMID: 18633121 PMCID: PMC2528112 DOI: 10.1104/pp.108.119164] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2008] [Accepted: 06/13/2008] [Indexed: 05/18/2023]
Abstract
During the establishment of symbiosis in legume roots, the rhizobial Nod factor signal is perceived by the host cells via receptor-like kinases, including SymRK. The NODULE INCEPTION (NIN) gene in Lotus japonicus is required for rhizobial entry into root cells and for nodule organogenesis. We describe here a novel DNA-binding protein from L. japonicus, referred to as SIP1, because it was identified as a SymRK-interacting protein. SIP1 contains a conserved AT-rich interaction domain (ARID) and represents a unique member of the ARID-containing proteins in plants. The C terminus of SIP1 was found to be responsible for its interaction with the kinase domain of SymRK and for homodimerization in the absence of DNA. SIP1 specifically binds to the promoter of LjNIN but not to that of LjCBP1 (a calcium-binding protein gene), both of which are known to be inducible by Nod factors. SIP1 recognizes two of the three AT-rich domains present in the NIN gene promoter. Deletion of one of the AT-rich domains at the NIN promoter diminishes the binding of SIP1 to the NIN promoter. The protein is localized to the nuclei when expressed as a red fluorescence fusion protein in the onion (Allium cepa) epidermal cells. The SIP1 gene is expressed constitutively in the uninfected roots, and its expression levels are elevated after infection by Mesorhizobium loti. It is proposed that SIP1 may be required for the expression of NIN and involved in the initial communications between the rhizobia and the host root cells.
Collapse
Affiliation(s)
- Hui Zhu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | | | | | | | | | | | | |
Collapse
|
43
|
Nuclear translocation of the phosphoprotein Hop (Hsp70/Hsp90 organizing protein) occurs under heat shock, and its proposed nuclear localization signal is involved in Hsp90 binding. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2008; 1783:1003-14. [PMID: 18280255 DOI: 10.1016/j.bbamcr.2008.01.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 01/11/2008] [Accepted: 01/14/2008] [Indexed: 11/24/2022]
Abstract
The Hsp70-Hsp90 complex is implicated in the folding and regulation of numerous signaling proteins, and Hop, the Hsp70-Hsp90 Organizing Protein, facilitates the association of this multichaperone machinery. Phosphatase treatment of mouse cell extracts reduced the number of Hop isoforms compared to untreated extracts, providing the first direct evidence that Hop was phosphorylated in vivo. Furthermore, surface plasmon resonance (SPR) spectroscopy showed that a cdc2 kinase phosphorylation mimic of Hop had reduced affinity for Hsp90 binding. Hop was predominantly cytoplasmic, but translocated to the nucleus in response to heat shock. A putative bipartite nuclear localization signal (NLS) has been identified within the Hsp90-binding domain of Hop. Although substitution of residues within the major arm of this proposed NLS abolished Hop-Hsp90 interaction as determined by SPR, this was not sufficient to prevent the nuclear accumulation of Hop under leptomycin-B treatment and heat shock conditions. These results showed for the first time that the subcellular localization of Hop was stress regulated and that the major arm of the putative NLS was not directly important for nuclear translocation but was critical for Hop-Hsp90 association in vitro. We propose a model in which the association of Hop with Hsp90 and the phosphorylated status of Hop both play a role in the mechanism of nucleo-cytoplasmic shuttling of Hop.
Collapse
|
44
|
Thao NP, Chen L, Nakashima A, Hara SI, Umemura K, Takahashi A, Shirasu K, Kawasaki T, Shimamoto K. RAR1 and HSP90 form a complex with Rac/Rop GTPase and function in innate-immune responses in rice. THE PLANT CELL 2007; 19:4035-45. [PMID: 18156216 PMCID: PMC2217650 DOI: 10.1105/tpc.107.055517] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A rice (Oryza sativa) Rac/Rop GTPase, Os Rac1, is involved in innate immunity, but its molecular function is largely unknown. RAR1 (for required for Mla12 resistance) and HSP90 (a heat shock protein 90 kD) are important components of R gene-mediated disease resistance, and their function is conserved in several plant species. HSP90 has also recently been shown to be important in mammalian innate immunity. However, their functions at the molecular level are not well understood. In this study, we examined the functional relationships between Os Rac1, RAR1, and HSP90. Os RAR1-RNA interference (RNAi) rice plants had impaired basal resistance to a compatible race of the blast fungus Magnaporthe grisea and the virulent bacterial blight pathogen Xanthomonas oryzae. Constitutively active Os Rac1 complemented the loss of resistance, suggesting that Os Rac1 and RAR1 are functionally linked. Coimmunoprecipitation experiments with rice cell culture extracts indicate that Rac1 forms a complex with RAR1, HSP90, and HSP70 in vivo. Studies with Os RAR1-RNAi and treatment with geldanamycin, an HSP90-specific inhibitor, showed that RAR1 and HSP90 are essential for the Rac1-mediated enhancement of pathogen-associated molecular pattern-triggered immune responses in rice cell cultures. Furthermore, the function of HSP90, but not RAR1, may be essential for their association with the Rac1 complex. Os Rac1 also regulates RAR1 expression at both the mRNA and protein levels. Together, our results indicate that Rac1, RAR1, HSP90, and HSP70 form one or more protein complexes in rice cells and suggest that these proteins play important roles in innate immunity in rice.
Collapse
Affiliation(s)
- Nguyen Phuong Thao
- Laboratory of Plant Molecular Genetics, Nara Institute of Science and Technology, Ikoma 630-0101, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
de la Fuente van Bentem S, Vossen JH, de Vries KJ, van Wees S, Tameling WIL, Dekker HL, de Koster CG, Haring MA, Takken FLW, Cornelissen BJC. Heat shock protein 90 and its co-chaperone protein phosphatase 5 interact with distinct regions of the tomato I-2 disease resistance protein. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2005; 43:284-98. [PMID: 15998314 DOI: 10.1111/j.1365-313x.2005.02450.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Recent data suggest that plant disease resistance (R) proteins are present in multi-protein complexes. Tomato R protein I-2 confers resistance against the fungal pathogen Fusarium oxysporum. To identify components of the I-2 complex, we performed yeast two-hybrid screens using the I-2 leucine-rich repeat (LRR) domain as bait, and identified protein phosphatase 5 (PP5) as an I-2 interactor. Subsequent screens revealed two members of the cytosolic heat shock protein 90 (HSP90) family as interactors of PP5. By performing in vitro protein-protein interaction analysis using recombinant proteins, we were able to show a direct interaction between I-2 and PP5, and between I-2 and HSP90. The N-terminal part of the LRR domain was found to interact with HSP90, whereas the C-terminal part bound to PP5. The specific binding of HSP90 to the N-terminal region of the I-2 LRR domain was confirmed by co-purifying HSP90 from tomato lysate using recombinant proteins. Similarly, the interaction between PP5 and HSP90 was established. To investigate the role of PP5 and HSP90 for I-2 function, virus-induced gene silencing was performed in Nicotiana benthamiana. Silencing of HSP90 but not of PP5 completely blocked cell death triggered by I-2, showing that HSP90 is required for I-2 function. Together these data suggest that R proteins require, like steroid hormone receptors in animal systems, an HSP90/PP5 complex for their folding and functioning.
Collapse
Affiliation(s)
- Sergio de la Fuente van Bentem
- Plant Pathology, Swammerdam Institute for Life Sciences, University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, The Netherlands
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Sangster TA, Queitsch C. The HSP90 chaperone complex, an emerging force in plant development and phenotypic plasticity. CURRENT OPINION IN PLANT BIOLOGY 2005; 8:86-92. [PMID: 15653405 DOI: 10.1016/j.pbi.2004.11.012] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The essential cellular functions of the molecular chaperone HSP90 have been intensively investigated in fungal and mammalian model systems. Several recent publications have highlighted the importance of this chaperone complex in plant development and responsiveness to external stimuli. In particular, HSP90 is crucial for R-protein-mediated defense against pathogens. Other facets of HSP90 function in plants include its involvement in phenotypic plasticity, developmental stability, and buffering of genetic variation. Plants have emerged as powerful tools that complement other model systems in attempts to extend our knowledge of the myriad impacts of protein folding and chaperone function.
Collapse
Affiliation(s)
- Todd A Sangster
- Committee on Genetics, University of Chicago, 920 E. 58th Street. Chicago, Illinois 60637, USA
| | | |
Collapse
|
47
|
Wang W, Vinocur B, Shoseyov O, Altman A. Role of plant heat-shock proteins and molecular chaperones in the abiotic stress response. TRENDS IN PLANT SCIENCE 2004; 9:244-52. [PMID: 15130550 DOI: 10.1016/j.tplants.2004.03.006] [Citation(s) in RCA: 1415] [Impact Index Per Article: 70.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Affiliation(s)
- Wangxia Wang
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agricultural, Food and Environmental Quality Sciences, The Hebrew University of Jerusalem, PO Box 12, Rehovot 76100, Israel
| | | | | | | |
Collapse
|
48
|
Wagner V, Fiedler M, Markert C, Hippler M, Mittag M. Functional proteomics of circadian expressed proteins from Chlamydomonas reinhardtii. FEBS Lett 2004; 559:129-35. [PMID: 14960320 DOI: 10.1016/s0014-5793(04)00051-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2003] [Revised: 01/10/2004] [Accepted: 01/12/2004] [Indexed: 10/26/2022]
Abstract
In this study, functional proteomics was successfully applied for the characterization of circadian expressed, basic proteins. For this purpose, we have chosen the green model alga Chlamydomonas reinhardtii since its entire nuclear genome is available and it is ideally suited for biochemical enrichment procedures. Proteins from cells harvested during subjective day and night were heparin affinity purified. They were separated by two-dimensional gel electrophoresis suited for basic proteins and analyzed after tryptic digestion by electrospray ionization mass spectrometry. We can show for the first time that the expressions of a protein disulfide isomerase-like protein and a tetratricopeptide repeat protein change in a circadian manner. Interestingly, both proteins are known to be interaction partners in multiprotein complexes including RNA binding proteins.
Collapse
Affiliation(s)
- Volker Wagner
- Institute of General Botany and Plant Physiology, Friedrich Schiller-University, Am Planetarium 1, D-07743 Jena, Germany
| | | | | | | | | |
Collapse
|
49
|
Abstract
Molecular chaperones facilitate the correct folding of other proteins under physiological and stress conditions. Recently it has become evident that various co-chaperone proteins regulate the cellular functions of these chaperones, particularly Hsp70 and Hsp90. Hop is one of the most extensively studied co-chaperones that is able to directly associate with both Hsp70 and Hsp90. The current dogma proposes that Hop functions primarily as an adaptor that directs Hsp90 to Hsp70-client protein complexes in the cytoplasm. However, recent evidence suggests that Hop can also modulate the chaperone activities of these Hsps, and that it is not dedicated to Hsp70 and Hsp90. While the co-chaperone function of Hop within the cytoplasm has been extensively studied, its association with nuclear complexes and prion proteins remains to be elucidated. This article will review the structural features of Hop, and the evidence that its biological function is considerably broader than previously envisaged.
Collapse
Affiliation(s)
- O O Odunuga
- Division of Medical Virology, Faculty of Health Sciences, University of Cape Town, South Africa
| | | | | |
Collapse
|