共查询到20条相似文献,搜索用时 15 毫秒
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Arabidopsis HsfA1 transcription factors function as the main positive regulators in heat shock-responsive gene expression 总被引:1,自引:0,他引:1
Yoshida T Ohama N Nakajima J Kidokoro S Mizoi J Nakashima K Maruyama K Kim JM Seki M Todaka D Osakabe Y Sakuma Y Schöffl F Shinozaki K Yamaguchi-Shinozaki K 《Molecular genetics and genomics : MGG》2011,286(5-6):321-332
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Histone acetyltransferase GCN5 is essential for heat stress‐responsive gene activation and thermotolerance in Arabidopsis 下载免费PDF全文
Zhaorong Hu Na Song Mei Zheng Xinye Liu Zhenshan Liu Jiewen Xing Junhua Ma Weiwei Guo Yingyin Yao Huiru Peng Mingming Xin Dao‐Xiu Zhou Zhongfu Ni Qixin Sun 《The Plant journal : for cell and molecular biology》2015,84(6):1178-1191
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AtHsfA2 modulates expression of stress responsive genes and enhances tolerance to heat and oxidative stress in Arabidopsis 总被引:5,自引:0,他引:5
LI Chunguang CHEN Qijun GAO Xinqi QI Bishu CHEN Naizhi XU Shouming CHEN Jia & WANG Xuechen . State Key Laboratory of Plant Physiology Biochemistry College of Biological Sciences China Agricultural University Beijing China . Department of Industry Engineering Zhengzhou Institute of Aeronautic Industry Management Zhengzhou China . College of Life Science Qufu Normal University Qufu Shandong China 《中国科学:生命科学英文版》2005,48(6):540-550
In nature, plants are subject to changes of tempera-ture. Thus, like other organisms, plants have evolved strategies for preventing damage caused by rapid changes in temperature and for repairing what damage is unavoidable. Heat stress responses have been well documented in a wide range of organisms. In all spe-cies studied, the heat shock (HS) response is charac-terized by a rapid production and a transient accumu-lation of specific families of proteins known as heat shock proteins (Hsps) th… 相似文献
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The duplication and divergence of heat stress (HS) response genes might help plants adapt to varied HS conditions, but little is known on the topic. Here, we examined the evolution and function of Arabidopsis (Arabidopsis thaliana) mitochondrial GrpE (Mge) proteins. GrpE acts as a nucleotide-exchange factor in the Hsp70/DnaK chaperone machinery. Genomic data show that AtMge1 and AtMge2 arose from a recent whole-genome duplication event. Phylogenetic analysis indicated that duplication and preservation of Mges occurred independently in many plant species, which suggests a common tendency in the evolution of the genes. Intron retention contributed to the divergence of the protein structure of Mge paralogs in higher plants. In both Arabidopsis and tomato (Solanum lycopersicum), Mge1 is induced by ultraviolet B light and Mge2 is induced by heat, which suggests regulatory divergence of the genes. Consistently, AtMge2 but not AtMge1 is under the control of HsfA1, the master regulator of the HS response. Heterologous expression of AtMge2 but not AtMge1 in the temperature-sensitive Escherichia coli grpE mutant restored its growth at 43°C. Arabidopsis T-DNA knockout lines under different HS regimes revealed that Mge2 is specifically required for tolerating prolonged exposure to moderately high temperature, as compared with the need of the heat shock protein 101 and the HS-associated 32-kD protein for short-term extreme heat. Therefore, with duplication and subfunctionalization, one copy of the Arabidopsis Mge genes became specialized in a distinct type of HS. We provide direct evidence supporting the connection between gene duplication and adaptation to environmental stress. 相似文献
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Design of an optimal promoter involved in the heat‐induced transcriptional pathway in Arabidopsis,soybean, rice and maize 下载免费PDF全文
Kyonoshin Maruyama Takuya Ogata Norihito Kanamori Kyouko Yoshiwara Shingo Goto Yoshiharu Y. Yamamoto Yuko Tokoro Chihiro Noda Yuta Takaki Hiroko Urawa Satoshi Iuchi Kaoru Urano Takuhiro Yoshida Tetsuya Sakurai Mikiko Kojima Hitoshi Sakakibara Kazuo Shinozaki Kazuko Yamaguchi‐Shinozaki 《The Plant journal : for cell and molecular biology》2017,89(4):671-680
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Eric Guisbert Daniel M. Czyz Klaus Richter Patrick D. McMullen Richard I. Morimoto 《PLoS genetics》2013,9(4)
The heat shock response (HSR) is essential to survive acute proteotoxic stress and has been studied extensively in unicellular organisms and tissue culture cells, but to a lesser extent in intact metazoan animals. To identify the regulatory pathways that control the HSR in Caenorhabditis elegans, we performed a genome-wide RNAi screen and identified 59 genes corresponding to 7 positive activators required for the HSR and 52 negative regulators whose knockdown leads to constitutive activation of the HSR. These modifiers function in specific steps of gene expression, protein synthesis, protein folding, trafficking, and protein clearance, and comprise the metazoan heat shock regulatory network (HSN). Whereas the positive regulators function in all tissues of C. elegans, nearly all of the negative regulators exhibited tissue-selective effects. Knockdown of the subunits of the proteasome strongly induces HS reporter expression only in the intestine and spermatheca but not in muscle cells, while knockdown of subunits of the TRiC/CCT chaperonin induces HS reporter expression only in muscle cells. Yet, both the proteasome and TRiC/CCT chaperonin are ubiquitously expressed and are required for clearance and folding in all tissues. We propose that the HSN identifies a key subset of the proteostasis machinery that regulates the HSR according to the unique functional requirements of each tissue. 相似文献
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Annalisa Paradiso Guido Domingo Emanuela Blanco Alessio Buscaglia Stefania Fortunato Milena Marsoni Pasquale Scarcia Sofia Caretto Candida Vannini Maria Concetta de Pinto 《Plant, cell & environment》2020,43(11):2727-2742
Heat stress (HS), causing impairment in several physiological processes, is one of the most damaging environmental cues for plants. To counteract the harmful effects of high temperatures, plants activate complex signalling networks, indicated as HS response (HSR). Expression of heat shock proteins (HSPs) and adjustment of redox homeostasis are crucial events of HSR, required for thermotolerance. By pharmacological approaches, the involvement of cAMP in triggering plant HSR has been recently proposed. In this study, to investigate the role of cAMP in HSR signalling, tobacco BY-2 cells overexpressing the ‘cAMP-sponge’, a genetic tool that reduces intracellular cAMP levels, have been used. in vivo cAMP dampening increased HS susceptibility in a HSPs-independent way. The failure in cAMP elevation during HS caused a high accumulation of reactive oxygen species, due to increased levels of respiratory burst oxidase homolog D, decreased activities of catalase and ascorbate peroxidase, as well as down-accumulation of proteins involved in the control of redox homeostasis. In addition, cAMP deficiency impaired proteasome activity and prevented the accumulation of many proteins of ubiquitin-proteasome system (UPS). By a large-scale proteomic approach together with in silico analyses, these UPS proteins were identified in a specific cAMP-dependent network of HSR. 相似文献
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