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Han S, Liu Y, Bao A, Zeng H, Huang G, Geng M, Zhang C, Zhang Q, Lu J, Wu M, Guo L. OsCSN1 regulates the growth of rice seedlings through the GA signaling pathway in blue light. JOURNAL OF PLANT PHYSIOLOGY 2023; 280:153904. [PMID: 36566672 DOI: 10.1016/j.jplph.2022.153904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
Blue light can regulate the photomorphogenesis of plants through blue light receptors to influence seedling growth and development. The COP9 signaling complex (CSN), a vital regulator of photomorphogenesis, is a highly conserved protein complex. CSN1 is the largest and most critical subunit in the CSN with a complex N-terminal function that supports most of the functions of CSN1 and is mainly involved in plant growth and development processes. The CSN is also required in the blue light-mediated photomorphogenesis response of seedlings. In this study, the OsCSN1 subunit of Oryza sativa subsp. japonica (rice) was edited and screened, and OsCSN1 deletion mutant, OsCSN1 weak expression mutant and OsCSN1 overexpression mutant were constructed. The mechanism of OsCSN1 and its N-terminal effects on rice seedling growth and development under blue light conditions were investigated. The addition of exogenous hormone gibberellin (GA3) and gibberellin synthesis inhibitor paclobutrazol (PAC) caused aboveground phenotypic and protein (such as CUL4 and SLR1) changes. Blue light regulates the degradation of SLR1 through OsCSN1, which regulates the growth and development of rice seedling height, the first incomplete leaf, and the coleoptile. It is hypothesized that rice affects CRY-COP1 interactions after sensing blue light signals through the cryptochrome, and the nuclear localization of COP1 is regulated by the CSN complex. OsCSN1 is a negative regulator in response to blue light. The core structural domain of action that inhibits the growth of the aboveground part of rice seedlings is located at the N-terminal of OsCSN1. OsCSN1 regulates the nuclear localization of COP1 through the COP9 signaling complex and degrades SLR1 through CUL4-based E3 ligase. Ultimately, it affects the synthesis of the endogenous hormone GA, thereby inhibiting the aboveground growth and development of rice seedlings.
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Affiliation(s)
- Shining Han
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China
| | - Yanxi Liu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China
| | - Anar Bao
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China
| | - Hua Zeng
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China
| | - Guohui Huang
- School of Life Sciences, Northeast Normal University, Changchun, 130024, PR China
| | - Min Geng
- College of Food and Biotechnology, Changchun Polytechnic, Changchun, 130033, PR China
| | - Chunyu Zhang
- College of Food and Biotechnology, Changchun Polytechnic, Changchun, 130033, PR China
| | - Qi Zhang
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China
| | - Jingmei Lu
- School of Life Sciences, Northeast Normal University, Changchun, 130024, PR China
| | - Ming Wu
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China.
| | - Liquan Guo
- College of Life Sciences, Jilin Agricultural University, Changchun, 130118, PR China.
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USP48 and A20 synergistically promote cell survival in Helicobacter pylori infection. Cell Mol Life Sci 2022; 79:461. [PMID: 35913642 PMCID: PMC9343311 DOI: 10.1007/s00018-022-04489-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/24/2022] [Accepted: 07/11/2022] [Indexed: 12/02/2022]
Abstract
The human pathogen Helicobacter pylori represents a risk factor for the development of gastric diseases including cancer. The H. pylori-induced transcription factor nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) is involved in the pro-inflammatory response and cell survival in the gastric mucosa, and represents a trailblazer of gastric pathophysiology. Termination of nuclear NF-κB heterodimer RelA/p50 activity is regulated by the ubiquitin-RING-ligase complex elongin-cullin-suppressor of cytokine signalling 1 (ECSSOCS1), which leads to K48-ubiquitinylation and degradation of RelA. We found that deubiquitinylase (DUB) ubiquitin specific protease 48 (USP48), which interacts with the COP9 signalosome (CSN) subunit CSN1, stabilises RelA by deubiquitinylation and thereby promotes the transcriptional activity of RelA to prolong de novo synthesis of DUB A20 in H. pylori infection. An important role of A20 is the suppression of caspase-8 activity and apoptotic cell death. USP48 thus enhances the activity of A20 to reduce apoptotic cell death in cells infected with H. pylori. Our results, therefore, define a synergistic mechanism by which USP48 and A20 regulate RelA and apoptotic cell death in H. pylori infection.
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Wang D, Musazade E, Wang H, Liu J, Zhang C, Liu W, Liu Y, Guo L. Regulatory Mechanism of the Constitutive Photomorphogenesis 9 Signalosome Complex in Response to Abiotic Stress in Plants. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:2777-2788. [PMID: 35199516 DOI: 10.1021/acs.jafc.1c07224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The constitutive photomorphogenesis 9 (COP9) signalosome (CSN) is a highly conserved protein complex that regulates signaling pathways in plants under abiotic stress. We discuss the potential molecular mechanisms of CSN under abiotic stress, including oxidative stress with reactive oxygen species signaling, salt stress with jasmonic acid, gibberellic acid, and abscisic acid signaling, high-temperature stress with auxin signaling, and optical radiation with DNA damage and repair response. We conclude that CSN likely participates in affecting antioxidant biosynthesis and hormone signaling by targeting receptors, kinases, and transcription factors in response to abiotic stress, which potentially provides valuable information for engineering stress-tolerant crops.
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Affiliation(s)
- Dan Wang
- College of Life Science, Key Laboratory of Straw Biology and Higher Value Application, Ministry of Education, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
- School of Public Health, Jilin Medical University, Jilin, Jilin 132013, People's Republic of China
| | - Elshan Musazade
- College of Life Science, Key Laboratory of Straw Biology and Higher Value Application, Ministry of Education, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
| | - Huan Wang
- Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
| | - Junmei Liu
- Food Science and Engineering, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
| | - Chunyu Zhang
- College of Food and Biotechnology, Changchun Polytechnic, Changchun, Jilin 130033, People's Republic of China
| | - Wencong Liu
- College of Resources and Environment, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
| | - Yanxi Liu
- College of Life Science, Key Laboratory of Straw Biology and Higher Value Application, Ministry of Education, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
| | - Liquan Guo
- College of Life Science, Key Laboratory of Straw Biology and Higher Value Application, Ministry of Education, Jilin Agricultural University, Changchun, Jilin 130118, People's Republic of China
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4
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Lu J, Fu Y, Li M, Wang S, Wang J, Yang Q, Ye J, Zhang X, Ma H, Chang F. Global Quantitative Proteomics Studies Revealed Tissue-Preferential Expression and Phosphorylation of Regulatory Proteins in Arabidopsis. Int J Mol Sci 2020; 21:ijms21176116. [PMID: 32854314 PMCID: PMC7503369 DOI: 10.3390/ijms21176116] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/18/2020] [Accepted: 08/21/2020] [Indexed: 12/24/2022] Open
Abstract
Organogenesis in plants occurs across all stages of the life cycle. Although previous studies have identified many genes as important for either vegetative or reproductive development at the RNA level, global information on translational and post-translational levels remains limited. In this study, six Arabidopsis stages/organs were analyzed using quantitative proteomics and phosphoproteomics, identifying 2187 non-redundant proteins and evidence for 1194 phosphoproteins. Compared to the expression observed in cauline leaves, the expression of 1445, 1644, and 1377 proteins showed greater than 1.5-fold alterations in stage 1–9 flowers, stage 10–12 flowers, and open flowers, respectively. Among these, 294 phosphoproteins with 472 phosphorylation sites were newly uncovered, including 275 phosphoproteins showing differential expression patterns, providing molecular markers and possible candidates for functional studies. Proteins encoded by genes preferentially expressed in anther (15), meiocyte (4), or pollen (15) were enriched in reproductive organs, and mutants of two anther-preferentially expressed proteins, acos5 and mee48, showed obviously reduced male fertility with abnormally organized pollen exine. In addition, more phosphorylated proteins were identified in reproductive stages (1149) than in the vegetative organs (995). The floral organ-preferential phosphorylation of GRP17, CDC2/CDKA.1, and ATSK11 was confirmed with western blot analysis. Moreover, phosphorylation levels of CDPK6 and MAPK6 and their interacting proteins were elevated in reproductive tissues. Overall, our study yielded extensive data on protein expression and phosphorylation at six stages/organs and provides an important resource for future studies investigating the regulatory mechanisms governing plant development.
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Affiliation(s)
- Jianan Lu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Ying Fu
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Mengyu Li
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Shuangshuang Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Jingya Wang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Qi Yang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Juanying Ye
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Xumin Zhang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
| | - Hong Ma
- Department of Biology, the Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA
- Correspondence: (H.M.); (F.C.); Tel.: +86-021-51630534 (H.M.); +1-814-865-5343 (F.C.)
| | - Fang Chang
- State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development, Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering and Institute of Biodiversity Sciences, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.L.); (Y.F.); (M.L.); (S.W.); (J.W.); (Q.Y.); (J.Y.); (X.Z.)
- Correspondence: (H.M.); (F.C.); Tel.: +86-021-51630534 (H.M.); +1-814-865-5343 (F.C.)
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5
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Stefanik N, Bizan J, Wilkens A, Tarnawska-Glatt K, Goto-Yamada S, Strzałka K, Nishimura M, Hara-Nishimura I, Yamada K. NAI2 and TSA1 Drive Differentiation of Constitutive and Inducible ER Body Formation in Brassicaceae. PLANT & CELL PHYSIOLOGY 2020; 61:722-734. [PMID: 31879762 DOI: 10.1093/pcp/pcz236] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 12/19/2019] [Indexed: 05/28/2023]
Abstract
Brassicaceae and closely related species develop unique endoplasmic reticulum (ER)-derived structures called ER bodies, which accumulate β-glucosidases/myrosinases that are involved in chemical defense. There are two different types of ER bodies: ER bodies constitutively present in seedlings (cER bodies) and ER bodies in rosette leaves induced by treatment with the wounding hormone jasmonate (JA) (iER bodies). Here, we show that At-α whole-genome duplication (WGD) generated the paralogous genes NAI2 and TSA1, which consequently drive differentiation of cER bodies and iER bodies in Brassicaceae plants. In Arabidopsis, NAI2 is expressed in seedlings where cER bodies are formed, whereas TSA1 is expressed in JA-treated leaves where iER bodies are formed. We found that the expression of NAI2 in seedlings and the JA inducibility of TSA1 are conserved across other Brassicaceae plants. The accumulation of NAI2 transcripts in Arabidopsis seedlings is dependent on the transcription factor NAI1, whereas the JA induction of TSA1 in rosette leaves is dependent on MYC2, MYC3 and MYC4. We discovered regions of microsynteny, including the NAI2/TSA1 genes, but the promoter regions are differentiated between TSA1 and NAI2 genes in Brassicaceae. This suggests that the divergence of function between NAI2 and TSA1 occurred immediately after WGD in ancestral Brassicaceae plants to differentiate the formation of iER and cER bodies. Our findings indicate that At-α WGD enabled diversification of defense strategies, which may have contributed to the massive diversification of Brassicaceae plants.
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Affiliation(s)
- Natalia Stefanik
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-387, Poland
- Faculty of Biology, Institute of Zoology and Biomedical Sciences, Jagiellonian University, Krakow 30-387, Poland
| | - Jakub Bizan
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Alwine Wilkens
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-387, Poland
- The Franciszek Gorski Institute of Plant Physiology, Polish Academy of Science, Krakow 30-239, Poland
| | | | - Shino Goto-Yamada
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Kazimierz Strzałka
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-387, Poland
| | - Mikio Nishimura
- Department of Cell Biology, National Institute for Basic Biology, Okazaki, 444-8585 Japan
| | | | - Kenji Yamada
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-387, Poland
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6
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Geem KR, Kim DH, Lee DW, Kwon Y, Lee J, Kim JH, Hwang I. Jasmonic acid-inducible TSA1 facilitates ER body formation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2019; 97:267-280. [PMID: 30267434 DOI: 10.1111/tpj.14112] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 09/11/2018] [Accepted: 09/12/2018] [Indexed: 05/28/2023]
Abstract
Members of the Brassicales contain an organelle, the endoplasmic reticulum (ER) body, which is derived from the ER. Recent studies have shed light on the biogenesis of the ER body and its physiological role in plants. However, formation of the ER body and its physiological role are not fully understood. Here, we investigated the physiological role of TSK-associating protein 1 (TSA1), a close homolog of NAI2 that is involved in ER body formation, and provide evidence that it is involved in ER body biogenesis under wound-related stress conditions. TSA1 is N-glycosylated and localizes to the ER body as a luminal protein. TSA1 was highly induced by the plant hormone, methyl jasmonate (MeJA). Ectopic expression of TSA1:GFP induced ER body formation in root tissues of transgenic Arabidopsis thaliana and in leaf tissues of Nicotiana benthamiana. TSA1 and NAI2 formed a heterocomplex and showed an additive effect on ER body formation in N. benthamiana. MeJA treatment induced ER body formation in leaf tissues of nai2 and tsa1 plants, but not nai2/tsa1 double-mutant plants. However, constitutive ER body formation was altered in young seedlings of nai2 plants but not tsa1 plants. Based on these results, we propose that TSA1 plays a critical role in MeJA-induced ER body formation in plants.
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Affiliation(s)
- Kyoung Rok Geem
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Dae Heon Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Dong Wook Lee
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Yun Kwon
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Junho Lee
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Jeong Hee Kim
- Department of Biochemistry and Molecular Biology, College of Dentistry, and Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul, 130-701, Korea
| | - Inhwan Hwang
- Department of Life Sciences, Pohang University of Science and Technology, Pohang, 37673, Korea
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, 37673, Korea
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7
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Pan R, Reumann S, Lisik P, Tietz S, Olsen LJ, Hu J. Proteome analysis of peroxisomes from dark-treated senescent Arabidopsis leaves. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2018; 60:1028-1050. [PMID: 29877633 DOI: 10.1111/jipb.12670] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 05/29/2018] [Indexed: 05/21/2023]
Abstract
Peroxisomes compartmentalize a dynamic suite of biochemical reactions and play a central role in plant metabolism, such as the degradation of hydrogen peroxide, metabolism of fatty acids, photorespiration, and the biosynthesis of plant hormones. Plant peroxisomes have been traditionally classified into three major subtypes, and in-depth mass spectrometry (MS)-based proteomics has been performed to explore the proteome of the two major subtypes present in green leaves and etiolated seedlings. Here, we carried out a comprehensive proteome analysis of peroxisomes from Arabidopsis leaves given a 48-h dark treatment. Our goal was to determine the proteome of the third major subtype of plant peroxisomes from senescent leaves, and further catalog the plant peroxisomal proteome. We identified a total of 111 peroxisomal proteins and verified the peroxisomal localization for six new proteins with potential roles in fatty acid metabolism and stress response by in vivo targeting analysis. Metabolic pathways compartmentalized in the three major subtypes of peroxisomes were also compared, which revealed a higher number of proteins involved in the detoxification of reactive oxygen species in peroxisomes from senescent leaves. Our study takes an important step towards mapping the full function of plant peroxisomes.
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Affiliation(s)
- Ronghui Pan
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Sigrun Reumann
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
- Center of Organelle Research, University of Stavanger, N-4021 Stavanger, Norway
- Department of Plant Biochemistry and Infection Biology, Institute of Plant Science and Microbiology, University of Hamburg, D-22609 Hamburg, Germany
| | - Piotr Lisik
- Center of Organelle Research, University of Stavanger, N-4021 Stavanger, Norway
| | - Stefanie Tietz
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
| | - Laura J Olsen
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Jianping Hu
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
- Plant Biology Department, Michigan State University, East Lansing, MI 48824, USA
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8
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Suisse A, He D, Legent K, Treisman JE. COP9 signalosome subunits protect Capicua from MAPK-dependent and -independent mechanisms of degradation. Development 2017; 144:2673-2682. [PMID: 28619822 DOI: 10.1242/dev.148767] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 06/08/2017] [Indexed: 11/20/2022]
Abstract
The COP9 signalosome removes Nedd8 modifications from the Cullin subunits of ubiquitin ligase complexes, reducing their activity. Here, we show that mutations in the Drosophila COP9 signalosome subunit 1b (CSN1b) gene increase the activity of ubiquitin ligases that contain Cullin 1. Analysis of CSN1b mutant phenotypes revealed a requirement for the COP9 signalosome to prevent ectopic expression of Epidermal growth factor receptor (EGFR) target genes. It does so by protecting Capicua, a transcriptional repressor of EGFR target genes, from EGFR pathway-dependent ubiquitylation by a Cullin 1/SKP1-related A/Archipelago E3 ligase and subsequent proteasomal degradation. The CSN1b subunit also maintains basal Capicua levels by protecting it from a separate mechanism of degradation that is independent of EGFR signaling. As a suppressor of tumor growth and metastasis, Capicua may be an important target of the COP9 signalosome in cancer.
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Affiliation(s)
- Annabelle Suisse
- Helen L. and Martin S. Kimmel Center at the Skirball Institute for Biomolecular Medicine and Department of Cell Biology, NYU School of Medicine, 540 First Avenue, New York, NY 10016, USA
| | - DanQing He
- Helen L. and Martin S. Kimmel Center at the Skirball Institute for Biomolecular Medicine and Department of Cell Biology, NYU School of Medicine, 540 First Avenue, New York, NY 10016, USA
| | - Kevin Legent
- Helen L. and Martin S. Kimmel Center at the Skirball Institute for Biomolecular Medicine and Department of Cell Biology, NYU School of Medicine, 540 First Avenue, New York, NY 10016, USA
| | - Jessica E Treisman
- Helen L. and Martin S. Kimmel Center at the Skirball Institute for Biomolecular Medicine and Department of Cell Biology, NYU School of Medicine, 540 First Avenue, New York, NY 10016, USA
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9
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Batzenschlager M, Schmit AC, Herzog E, Fuchs J, Schubert V, Houlné G, Chabouté ME. MGO3 and GIP1 act synergistically for the maintenance of centromeric cohesion. Nucleus 2017; 8:98-105. [PMID: 28033038 DOI: 10.1080/19491034.2016.1276142] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
The control of genomic maintenance during S phase is crucial in eukaryotes. It involves the establishment of sister chromatid cohesion, ensuring faithful chromosome segregation, as well as proper DNA replication and repair to preserve genetic information. In animals, nuclear periphery proteins - including inner nuclear membrane proteins and nuclear pore-associated components - are key factors which regulate DNA integrity. Corresponding functional homologues are not so well known in plants which may have developed specific mechanisms due to their sessile life. We have already characterized the Gamma-tubulin Complex Protein 3-interacting proteins (GIPs) as essential regulators of centromeric cohesion at the nuclear periphery. GIPs were also shown to interact with TSA1, first described as a partner of the epigenetic regulator MGOUN3 (MGO3)/BRUSHY1 (BRU1)/TONSOKU (TSK) involved in genomic maintenance. Here, using genetic analyses, we show that the mgo3gip1 mutants display an impaired and pleiotropic development including fasciation. We also provide evidence for the contribution of both MGO3 and GIP1 to the regulation of centromeric cohesion in Arabidopsis.
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Affiliation(s)
- Morgane Batzenschlager
- a Institut de Biologie Moléculaire des Plantes, CNRS , Université de Strasbourg , Strasbourg , France
| | - Anne-Catherine Schmit
- a Institut de Biologie Moléculaire des Plantes, CNRS , Université de Strasbourg , Strasbourg , France
| | - Etienne Herzog
- a Institut de Biologie Moléculaire des Plantes, CNRS , Université de Strasbourg , Strasbourg , France
| | - Joerg Fuchs
- b Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben , Stadt Seeland , Germany
| | - Veit Schubert
- b Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben , Stadt Seeland , Germany
| | - Guy Houlné
- a Institut de Biologie Moléculaire des Plantes, CNRS , Université de Strasbourg , Strasbourg , France
| | - Marie-Edith Chabouté
- a Institut de Biologie Moléculaire des Plantes, CNRS , Université de Strasbourg , Strasbourg , France
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10
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Li P, Xie L, Gu Y, Li J, Xie J. Roles of Multifunctional COP9 Signalosome Complex in Cell Fate and Implications for Drug Discovery. J Cell Physiol 2017; 232:1246-1253. [PMID: 27869306 DOI: 10.1002/jcp.25696] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Accepted: 11/18/2016] [Indexed: 01/24/2023]
Abstract
The eight subunits containing COP9 signalosome (CSN) complex, is highly conserved among eukaryotes. CSN, identified as a negative regulator of photomorphogenesis, has also been demonstrated to be important in proteolysis, cellular signal transduction and cell cycle regulation in various eukaryotic organisms. This review mainly summarizes the roles of CSN in cell cycle regulation, signal transduction and apoptosis, and its potential as diagnostic biomarkers, drug targets for cancer and infectious diseases. J. Cell. Physiol. 232: 1246-1253, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ping Li
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, Chongqing, China
| | - Longxiang Xie
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, Chongqing, China
| | - Yinzhong Gu
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, Chongqing, China
| | - Jiang Li
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, Chongqing, China
| | - Jianping Xie
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, Chongqing, China
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Crystal structure and versatile functional roles of the COP9 signalosome subunit 1. Proc Natl Acad Sci U S A 2013; 110:11845-50. [PMID: 23818606 DOI: 10.1073/pnas.1302418110] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The constitutive photomorphogenesis 9 (COP9) signalosome (CSN) plays key roles in many biological processes, such as repression of photomorphogenesis in plants and protein subcellular localization, DNA-damage response, and NF-κB activation in mammals. It is an evolutionarily conserved eight-protein complex with subunits CSN1 to CSN8 named following the descending order of molecular weights. Here, we report the crystal structure of the largest CSN subunit, CSN1 from Arabidopsis thaliana (atCSN1), which belongs to the Proteasome, COP9 signalosome, Initiation factor 3 (PCI) domain containing CSN subunit family, at 2.7 Å resolution. In contrast to previous predictions and distinct from the PCI-containing 26S proteasome regulatory particle subunit Rpn6 structure, the atCSN1 structure reveals an overall globular fold, with four domains consisting of helical repeat-I, linker helix, helical repeat-II, and the C-terminal PCI domain. Our small-angle X-ray scattering envelope of the CSN1-CSN7 complex agrees with the EM structure of the CSN alone (apo-CSN) and suggests that the PCI end of each molecule may mediate the interaction. Fitting of the CSN1 structure into the CSN-Skp1-Cul1-Fbox (SCF) EM structure shows that the PCI domain of CSN1 situates at the hub of the CSN for interaction with several other subunits whereas the linker helix and helical repeat-II of CSN1 contacts SCF using a conserved surface patch. Furthermore, we show that, in human, the C-terminal tail of CSN1, a segment not included in our crystal structure, interacts with IκBα in the NF-κB pathway. Therefore, the CSN complex uses multiple mechanisms to hinder NF-κB activation, a principle likely to hold true for its regulation of many other targets and pathways.
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Batzenschlager M, Masoud K, Janski N, Houlné G, Herzog E, Evrard JL, Baumberger N, Erhardt M, Nominé Y, Kieffer B, Schmit AC, Chabouté ME. The GIP gamma-tubulin complex-associated proteins are involved in nuclear architecture in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2013; 4:480. [PMID: 24348487 PMCID: PMC3842039 DOI: 10.3389/fpls.2013.00480] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 11/05/2013] [Indexed: 05/08/2023]
Abstract
During interphase, the microtubular cytoskeleton of cycling plant cells is organized in both cortical and perinuclear arrays. Perinuclear microtubules (MTs) are nucleated from γ-Tubulin Complexes (γ-TuCs) located at the surface of the nucleus. The molecular mechanisms of γ-TuC association to the nuclear envelope (NE) are currently unknown. The γ-TuC Protein 3 (GCP3)-Interacting Protein 1 (GIP1) is the smallest γ-TuC component identified so far. AtGIP1 and its homologous protein AtGIP2 participate in the localization of active γ-TuCs at interphasic and mitotic MT nucleation sites. Arabidopsis gip1gip2 mutants are impaired in establishing a fully functional mitotic spindle and exhibit severe developmental defects. In this study, gip1gip2 knock down mutants were further characterized at the cellular level. In addition to defects in both the localization of γ-TuC core proteins and MT fiber robustness, gip1gip2 mutants exhibited a severe alteration of the nuclear shape associated with an abnormal distribution of the nuclear pore complexes. Simultaneously, they showed a misorganization of the inner nuclear membrane protein AtSUN1. Furthermore, AtGIP1 was identified as an interacting partner of AtTSA1 which was detected, like the AtGIP proteins, at the NE. These results provide the first evidence for the involvement of a γ-TuC component in both nuclear shaping and NE organization. Functional hypotheses are discussed in order to propose a model for a GIP-dependent nucleo-cytoplasmic continuum.
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Affiliation(s)
- Morgane Batzenschlager
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Kinda Masoud
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Natacha Janski
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Guy Houlné
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Etienne Herzog
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Jean-Luc Evrard
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Nicolas Baumberger
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Mathieu Erhardt
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
| | - Yves Nominé
- Biotechnologie et Signalisation cellulaire, Institut de Recherche de l'Ecole de Biotechnologie de Strasbourg, UMR 7242, Université de StrasbourgIllkirch, France
| | - Bruno Kieffer
- Institut de Génétique et Biologie Moléculaire et Cellulaire, Ecole Supérieure de Biotechnologie de StrasbourgIllkirch, France
| | - Anne-Catherine Schmit
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
- *Correspondence: Anne-Catherine Schmit, Institut de Biologie Moléculaire des Plantes, UPR2357 du CNRS, 12, rue du Gl Zimmer, 67084 Strasbourg-Cedex, France e-mail:
| | - Marie-Edith Chabouté
- Centre National de la Recherche Scientifique, Institut de Biologie Moléculaire des Plantes, UPR 2357, Conventionné avec l'Université de StrasbourgStrasbourg, France
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