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Feng S, Feng Z, Wei Y, Zheng X, Deng Z, Liao Z, Jin Y, Chen R, Zhao L. EEF1B2 regulates bone marrow-derived mesenchymal stem cells bone-fat balance via Wnt/β-catenin signaling. Cell Mol Life Sci 2024; 81:260. [PMID: 38878096 PMCID: PMC11335296 DOI: 10.1007/s00018-024-05297-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 02/25/2024] [Accepted: 05/26/2024] [Indexed: 06/29/2024]
Abstract
The pathological advancement of osteoporosis is caused by the uneven development of bone marrow-derived mesenchymal stem cells (BMSCs) in terms of osteogenesis and adipogenesis. While the role of EEF1B2 in intellectual disability and tumorigenesis is well established, its function in the bone-fat switch of BMSCs is still largely unexplored. During the process of osteogenic differentiation, we observed an increase in the expression of EEF1B2, while a decrease in its expression was noted during adipogenesis. Suppression of EEF1B2 hindered the process of osteogenic differentiation and mineralization while promoting adipogenic differentiation. On the contrary, overexpression of EEF1B2 enhanced osteogenesis and strongly inhibited adipogenesis. Furthermore, the excessive expression of EEF1B2 in the tibias has the potential to mitigate bone loss and decrease marrow adiposity in mice with osteoporosis. In terms of mechanism, the suppression of β-catenin activity occurred when EEF1B2 function was suppressed during osteogenesis. Our collective findings indicate that EEF1B2 functions as a regulator, influencing the differentiation of BMSCs and maintaining a balance between bone and fat. Our finding highlights its potential as a therapeutic target for diseases related to bone metabolism.
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Affiliation(s)
- Shuhao Feng
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Zihang Feng
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Yiran Wei
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Xiaoyong Zheng
- Orthopaedic Department, The 4th medical center of Chinese PLA General Hospital, Beijing, 100089, China
| | - Zhonghao Deng
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Zheting Liao
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Yangchen Jin
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Ruge Chen
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China
| | - Liang Zhao
- Department of Orthopedics, Nanfang Hospital, Southern Medical University, No. 1838, North Guangzhou Avenue, Baiyun District, Guangzhou, Guangdong, 510515, China.
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2
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Qi H, Yu M, Fan X, Zhou Y, Zhang M, Gao X. Methionine and Leucine Promote mTOR Gene Transcription and Milk Synthesis in Mammary Epithelial Cells through the eEF1Bα-UBR5-ARID1A Signaling. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:11733-11745. [PMID: 38725145 DOI: 10.1021/acs.jafc.4c00973] [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: 05/23/2024]
Abstract
Amino acids are essential for the activation of the mechanistic target of rapamycin (mTOR), but the corresponding molecular mechanism is not yet fully understood. We previously found that Met stimulated eukaryotic elongation factor α (eEF1Bα) nuclear localization in bovine mammary epithelial cells (MECs). Herein, we explored the role and molecular mechanism of eEF1Bα in methionine (Met)- and leucine (Leu)-stimulated mTOR gene transcription and milk synthesis in MECs. eEF1Bα knockdown decreased milk protein and fat synthesis, cell proliferation, and mTOR mRNA expression and phosphorylation, whereas eEF1Bα overexpression had the opposite effects. QE-MS analysis detected that eEF1Bα was phosphorylated at Ser106 in the nucleus and Met and Leu stimulated p-eEF1Bα nuclear localization. eEF1Bα knockdown abrogated the stimulation of Met and Leu by mTOR mRNA expression and phosphorylation, and this regulatory role was dependent on its phosphorylation. Akt knockdown blocked the stimulation of Met and Leu by eEF1Bα and p-eEF1Bα expression. ChIP-PCR detected that p-eEF1Bα bound only to the -548 to -793 nt site in the mTOR promoter, and ChIP-qPCR further detected that Met and Leu stimulated this binding. eEF1Bα mediated Met and Leu' stimulation on mTOR mRNA expression and phosphorylation through inducing AT-rich interaction domain 1A (ARID1A) ubiquitination degradation, and this process depended on eEF1Bα phosphorylation. p-eEF1Bα interacted with ARID1A and ubiquitin protein ligase E3 module N-recognition 5 (UBR5), and UBR5 knockdown rescued the decrease of the ARID1A protein level by eEF1Bα overexpression. Both eEF1Bα and p-eEF1Bα were highly expressed in mouse mammary gland tissues during the lactating period. In summary, we reveal that Met and Leu stimulate mTOR transcriptional activation and milk protein and fat synthesis in MECs through eEF1Bα-UBR5-ARID1A signaling.
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Affiliation(s)
- Hao Qi
- College of Animal Science and Technology, Yangtze University, Jingzhou 434025, China
| | - Mengmemg Yu
- College of Animal Science and Technology, Yangtze University, Jingzhou 434025, China
| | - Xiuqiang Fan
- College of Animal Science and Technology, Yangtze University, Jingzhou 434025, China
| | - Yuwen Zhou
- College of Animal Science and Technology, Yangtze University, Jingzhou 434025, China
| | - Minghui Zhang
- College of Animal Science and Technology, Yangtze University, Jingzhou 434025, China
| | - Xuejun Gao
- College of Animal Science and Technology, Yangtze University, Jingzhou 434025, China
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3
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Di Giuseppe F, Ricci-Vitiani L, Pallini R, Di Pietro R, Di Iorio P, Ascani G, Ciccarelli R, Angelucci S. Changes Induced by P2X7 Receptor Stimulation of Human Glioblastoma Stem Cells in the Proteome of Extracellular Vesicles Isolated from Their Secretome. Cells 2024; 13:571. [PMID: 38607010 PMCID: PMC11011151 DOI: 10.3390/cells13070571] [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: 03/01/2024] [Revised: 03/19/2024] [Accepted: 03/21/2024] [Indexed: 04/13/2024] Open
Abstract
Extracellular vesicles (EVs) are secreted from many tumors, including glioblastoma multiforme (GBM), the most common and lethal brain tumor in adults, which shows high resistance to current therapies and poor patient prognosis. Given the high relevance of the information provided by cancer cell secretome, we performed a proteomic analysis of microvesicles (MVs) and exosomes (EXOs) released from GBM-derived stem cells (GSCs). The latter, obtained from the brain of GBM patients, expressed P2X7 receptors (P2X7Rs), which positively correlate with GBM growth and invasiveness. P2X7R stimulation of GSCs caused significant changes in the EV content, mostly ex novo inducing or upregulating the expression of proteins related to cytoskeleton reorganization, cell motility/spreading, energy supply, protection against oxidative stress, chromatin remodeling, and transcriptional regulation. Most of the induced/upregulated proteins have already been identified as GBM diagnostic/prognostic factors, while others have only been reported in peripheral tumors. Our findings indicate that P2X7R stimulation enhances the transport and, therefore, possible intercellular exchange of GBM aggressiveness-increasing proteins by GSC-derived EVs. Thus, P2X7Rs could be considered a new druggable target of human GBM, although these data need to be confirmed in larger experimental sets.
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Affiliation(s)
- Fabrizio Di Giuseppe
- Department of Innovative Technologies in Medicine and Dentistry, ‘G. d’Annunzio’ University of Chieti-Pescara, Via Vestini 31, 66100 Chieti, Italy;
- Center for Advanced Studies and Technology (CAST), ‘G d’Annunzio’ University of Chieti-Pescara, Via L Polacchi 13, 66100 Chieti, Italy;
- Stem TeCh Group, Via L Polacchi 13, 66100 Chieti, Italy
| | - Lucia Ricci-Vitiani
- Department of Medical, Oral and Biotechnological Sciences, ‘G d’Annunzio’ University of Chieti-Pescara, Via Vestini 31, 66100 Chieti, Italy;
| | - Roberto Pallini
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità, Via Regina Elena 299, 00161 Rome, Italy;
| | - Roberta Di Pietro
- Institute of Neurosurgery, Università Cattolica del Sacro Cuore, Largo Agostino Gemelli 8, 00168 Rome, Italy;
| | - Patrizia Di Iorio
- Department of Medicine and Aging Sciences, ‘G. d’Annunzio’ University of Chieti-Pescara, Via Vestini 31, 66100 Chieti, Italy;
| | - Giuliano Ascani
- UOSD Maxillofacial Surgery, Azienda Sanitaria Locale di Pescara, Via Renato Paolini 47, 65124 Pescara, Italy;
| | - Renata Ciccarelli
- Center for Advanced Studies and Technology (CAST), ‘G d’Annunzio’ University of Chieti-Pescara, Via L Polacchi 13, 66100 Chieti, Italy;
| | - Stefania Angelucci
- Department of Innovative Technologies in Medicine and Dentistry, ‘G. d’Annunzio’ University of Chieti-Pescara, Via Vestini 31, 66100 Chieti, Italy;
- Center for Advanced Studies and Technology (CAST), ‘G d’Annunzio’ University of Chieti-Pescara, Via L Polacchi 13, 66100 Chieti, Italy;
- Stem TeCh Group, Via L Polacchi 13, 66100 Chieti, Italy
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4
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Negrutskii B, Shalak V, Novosylna O, Porubleva L, Lozhko D, El'skaya A. The eEF1 family of mammalian translation elongation factors. BBA ADVANCES 2022; 3:100067. [PMID: 37082266 PMCID: PMC10074971 DOI: 10.1016/j.bbadva.2022.100067] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/29/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
The eEF1 family of mammalian translation elongation factors is comprised of the two variants of eEF1A (eEF1A1 and eEF1A2), and the eEF1B complex. The latter consists of eEF1Bα, eEF1Bβ, and eEF1Bγ subunits. The two eEF1A variants have similar translation activity but may differ with respect to their secondary, "moonlighting" functions. This variability is underlined by the difference in the spatial organization of eEF1A1 and eEF1A2, and also possibly by the differences in their post-translational modifications. Here, we review the data on the spatial organization and post-translation modifications of eEF1A1 and eEF1A2, and provide examples of their involvement in various processes in addition to translation. We also describe the structural models of eEF1B subunits, their organization in the subcomplexes, and the trimeric model of the entire eEF1B complex. We discuss the functional consequences of such an assembly into a complex as well as the involvement of individual subunits in non-translational processes.
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Affiliation(s)
- B.S. Negrutskii
- Institute of Molecular Biology and Genetics, Acad. Zabolotnogo Str. 150, 03143 Kyiv, Ukraine
- Aarhus Institute of Advanced Sciences, Høegh-Guldbergs Gade 6B, DK–8000 Aarhus C, Denmark
- Department of Molecular Biology and Genetics, Aarhus University, Universitetsbyen 81, DK-8000 Aarhus C, Denmark
| | - V.F. Shalak
- Institute of Molecular Biology and Genetics, Acad. Zabolotnogo Str. 150, 03143 Kyiv, Ukraine
| | - O.V. Novosylna
- Institute of Molecular Biology and Genetics, Acad. Zabolotnogo Str. 150, 03143 Kyiv, Ukraine
| | - L.V. Porubleva
- Institute of Molecular Biology and Genetics, Acad. Zabolotnogo Str. 150, 03143 Kyiv, Ukraine
| | - D.M. Lozhko
- Institute of Molecular Biology and Genetics, Acad. Zabolotnogo Str. 150, 03143 Kyiv, Ukraine
| | - A.V. El'skaya
- Institute of Molecular Biology and Genetics, Acad. Zabolotnogo Str. 150, 03143 Kyiv, Ukraine
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5
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Bondarchuk TV, Shalak VF, Lozhko DM, Fatalska A, Szczepanowski R, Liudkovska V, Tsuvariev O, Dadlez M, El'skaya A, Negrutskii B. Quaternary organization of the human eEF1B complex reveals unique multi-GEF domain assembly. Nucleic Acids Res 2022; 50:9490-9504. [PMID: 35971611 PMCID: PMC9458455 DOI: 10.1093/nar/gkac685] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 07/12/2022] [Accepted: 07/31/2022] [Indexed: 12/24/2022] Open
Abstract
Protein synthesis in eukaryotic cell is spatially and structurally compartmentalized that ensures high efficiency of this process. One of the distinctive features of higher eukaryotes is the existence of stable multi-protein complexes of aminoacyl-tRNA synthetases and translation elongation factors. Here, we report a quaternary organization of the human guanine-nucleotide exchange factor (GEF) complex, eEF1B, comprising α, β and γ subunits that specifically associate into a heterotrimeric form eEF1B(αβγ)3. As both the eEF1Bα and eEF1Bβ proteins have structurally conserved GEF domains, their total number within the complex is equal to six. Such, so far, unique structural assembly of the guanine-nucleotide exchange factors within a stable complex may be considered as a 'GEF hub' that ensures efficient maintenance of the translationally active GTP-bound conformation of eEF1A in higher eukaryotes.
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Affiliation(s)
- Tetiana V Bondarchuk
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Zabolotnogo St., 03143 Kyiv, Ukraine
| | - Vyacheslav F Shalak
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Zabolotnogo St., 03143 Kyiv, Ukraine
| | - Dmytro M Lozhko
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Zabolotnogo St., 03143 Kyiv, Ukraine
| | - Agnieszka Fatalska
- Institute of Biochemistry and Biophysics, PAN, Pawinskiego 5a, 02-109 Warsaw, Poland
- Department of Genetics, University of Cambridge, Cambridge CB2 3EH, UK
| | - Roman H Szczepanowski
- International Institute of Molecular and Cell Biology, Trojdena 4, 02-109 Warsaw, Poland
| | - Vladyslava Liudkovska
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Zabolotnogo St., 03143 Kyiv, Ukraine
- International Institute of Molecular and Cell Biology, Trojdena 4, 02-109 Warsaw, Poland
| | - Oleksandr Yu Tsuvariev
- Institute of High Technologies, Taras Shevchenko National University of Kyiv, Akademik Glushkov Ave. 4-g, 03022 Kyiv, Ukraine
| | - Michal Dadlez
- Institute of Biochemistry and Biophysics, PAN, Pawinskiego 5a, 02-109 Warsaw, Poland
| | - Anna V El'skaya
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Zabolotnogo St., 03143 Kyiv, Ukraine
| | - Boris S Negrutskii
- Institute of Molecular Biology and Genetics, NAS of Ukraine, 150 Zabolotnogo St., 03143 Kyiv, Ukraine
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6
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Kachaev ZM, Ivashchenko SD, Kozlov EN, Lebedeva LA, Shidlovskii YV. Localization and Functional Roles of Components of the Translation Apparatus in the Eukaryotic Cell Nucleus. Cells 2021; 10:3239. [PMID: 34831461 PMCID: PMC8623629 DOI: 10.3390/cells10113239] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/11/2021] [Accepted: 11/16/2021] [Indexed: 12/15/2022] Open
Abstract
Components of the translation apparatus, including ribosomal proteins, have been found in cell nuclei in various organisms. Components of the translation apparatus are involved in various nuclear processes, particularly those associated with genome integrity control and the nuclear stages of gene expression, such as transcription, mRNA processing, and mRNA export. Components of the translation apparatus control intranuclear trafficking; the nuclear import and export of RNA and proteins; and regulate the activity, stability, and functional recruitment of nuclear proteins. The nuclear translocation of these components is often involved in the cell response to stimulation and stress, in addition to playing critical roles in oncogenesis and viral infection. Many components of the translation apparatus are moonlighting proteins, involved in integral cell stress response and coupling of gene expression subprocesses. Thus, this phenomenon represents a significant interest for both basic and applied molecular biology. Here, we provide an overview of the current data regarding the molecular functions of translation factors and ribosomal proteins in the cell nucleus.
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Affiliation(s)
- Zaur M. Kachaev
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
- Center for Genetics and Life Science, Sirius University of Science and Technology, 354340 Sochi, Russia
| | - Sergey D. Ivashchenko
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
| | - Eugene N. Kozlov
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
| | - Lyubov A. Lebedeva
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
| | - Yulii V. Shidlovskii
- Department of Gene Expression Regulation in Development, Institute of Gene Biology, Russian Academy of Sciences, 119334 Moscow, Russia; (Z.M.K.); (S.D.I.); (E.N.K.); (L.A.L.)
- Center for Genetics and Life Science, Sirius University of Science and Technology, 354340 Sochi, Russia
- Department of Biology and General Genetics, Sechenov First Moscow State Medical University (Sechenov University), 119992 Moscow, Russia
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7
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Gościńska K, Shahmoradi Ghahe S, Domogała S, Topf U. Eukaryotic Elongation Factor 3 Protects Saccharomyces cerevisiae Yeast from Oxidative Stress. Genes (Basel) 2020; 11:genes11121432. [PMID: 33260587 PMCID: PMC7760200 DOI: 10.3390/genes11121432] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 02/06/2023] Open
Abstract
Translation is a core process of cellular protein homeostasis and, thus, needs to be tightly regulated. The production of newly synthesized proteins adapts to the current needs of the cell, including the response to conditions of oxidative stress. Overall protein synthesis decreases upon oxidative stress. However, the selective production of proteins is initiated to help neutralize stress conditions. In contrast to higher eukaryotes, fungi require three translation elongation factors, eEF1, eEF2, and eEF3, for protein synthesis. eEF1 and eEF2 are evolutionarily conserved, but they alone are insufficient for the translation elongation process. eEF3 is encoded by two paralogous genes, YEF3 and HEF3. However, only YEF3 is essential in yeast, whereas the function of HEF3 remains unknown. To elucidate the cellular function of Hef3p, we used cells that were depleted of HEF3 and treated with H2O2 and analyzed the growth of yeast, global protein production, and protein levels. We found that HEF3 is necessary to withstand oxidative stress conditions, suggesting that Hef3p is involved in the selective production of proteins that are necessary for defense against reactive oxygen species.
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Bchini R, Girardet JM, Sormani R, Gelhaye E, Morel-Rouhier M. Oxidized glutathione promotes association between eukaryotic translation elongation factor 1Bγ and Ure2p glutathione transferase from Phanerochaete chrysosporium. FEBS J 2020; 288:2956-2969. [PMID: 33124131 DOI: 10.1111/febs.15614] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/10/2020] [Accepted: 10/27/2020] [Indexed: 11/27/2022]
Abstract
The eukaryotic translation elongation factor 1Bγ (eEF1Bγ) is an atypical member of the glutathione transferase (GST) superfamily. Contrary to more classical GSTs having a role in toxic compound detoxification, eEF1Bγ is suggested to act as a scaffold protein, anchoring the elongation factor complex EF1B to the endoplasmic reticulum. In this study, we show that eEF1Bγ from the basidiomycete Phanerochaete chrysosporium is fully active as a glutathione transferase in vitro and undergoes conformational changes upon binding of oxidized glutathione. Using real-time analyses of biomolecular interactions, we show that GSSG allows eEF1Bγ to physically interact with other GSTs from the Ure2p class, opening new perspectives for a better understanding of the role of eEF1Bγ in cellular oxidative stress response.
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Wygrecka M, Kosanovic D, Kwapiszewska G, Preissner KT. Editorial: Multitasking Biomolecules in Human Pathologies: Known Players on Their Unexpected Journeys. Front Med (Lausanne) 2020; 7:478. [PMID: 32974371 PMCID: PMC7471247 DOI: 10.3389/fmed.2020.00478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 07/15/2020] [Indexed: 01/01/2023] Open
Affiliation(s)
- Malgorzata Wygrecka
- Department of Biochemistry, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Djuro Kosanovic
- Department of Pulmonology, I. M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | | | - Klaus T Preissner
- Department of Biochemistry, Universities of Giessen and Marburg Lung Center, Giessen, Germany
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