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Kobayashi T, Yamazaki K, Shinada J, Mizunuma M, Furukawa K, Chuman Y. Identification of Inhibitors of the Disease-Associated Protein Phosphatase Scp1 Using Antibody Mimetic Molecules. Int J Mol Sci 2024; 25:3737. [PMID: 38612548 PMCID: PMC11011526 DOI: 10.3390/ijms25073737] [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: 02/28/2024] [Revised: 03/18/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Protein phosphorylation is a prevalent translational modification, and its dysregulation has been implicated in various diseases, including cancer. Despite its significance, there is a lack of specific inhibitors of the FCP/SCP-type Ser/Thr protein phosphatase Scp1, characterized by high specificity and affinity. In this study, we focused on adnectin, an antibody-mimetic protein, aiming to identify Scp1-specific binding molecules with a broad binding surface that target the substrate-recognition site of Scp1. Biopanning of Scp1 was performed using an adnectin-presenting phage library with a randomized FG loop. We succeeded in identifying FG-1Adn, which showed high affinity and specificity for Scp1. Ala scanning analysis of the Scp1-binding sequence in relation to the FG-1 peptide revealed that hydrophobic residues, including aromatic amino acids, play important roles in Scp1 recognition. Furthermore, FG-1Adn was found to co-localize with Scp1 in cells, especially on the plasma membrane. In addition, Western blotting analysis showed that FG-1Adn increased the phosphorylation level of the target protein of Scp1 in cells, indicating that FG-1Adn can inhibit the function of Scp1. These results suggest that FG-1Adn can be used as a specific inhibitor of Scp1.
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Affiliation(s)
| | | | | | | | | | - Yoshiro Chuman
- Department of Chemistry, Faculty of Science, Niigata University, Niigata 950-2181, Japan; (T.K.); (K.Y.); (J.S.); (M.M.); (K.F.)
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2
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Li M, Zhang L, Chen CW. Diverse Roles of Protein Palmitoylation in Cancer Progression, Immunity, Stemness, and Beyond. Cells 2023; 12:2209. [PMID: 37759431 PMCID: PMC10526800 DOI: 10.3390/cells12182209] [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: 07/20/2023] [Revised: 08/27/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Protein S-palmitoylation, a type of post-translational modification, refers to the reversible process of attachment of a fatty acyl chain-a 16-carbon palmitate acid-to the specific cysteine residues on target proteins. By adding the lipid chain to proteins, it increases the hydrophobicity of proteins and modulates protein stability, interaction with effector proteins, subcellular localization, and membrane trafficking. Palmitoylation is catalyzed by a group of zinc finger DHHC-containing proteins (ZDHHCs), whereas depalmitoylation is catalyzed by a family of acyl-protein thioesterases. Increasing numbers of oncoproteins and tumor suppressors have been identified to be palmitoylated, and palmitoylation is essential for their functions. Understanding how palmitoylation influences the function of individual proteins, the physiological roles of palmitoylation, and how dysregulated palmitoylation leads to pathological consequences are important drivers of current research in this research field. Further, due to the critical roles in modifying functions of oncoproteins and tumor suppressors, targeting palmitoylation has been used as a candidate therapeutic strategy for cancer treatment. Here, based on recent literatures, we discuss the progress of investigating roles of palmitoylation in regulating cancer progression, immune responses against cancer, and cancer stem cell properties.
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Affiliation(s)
- Mingli Li
- Department of Systems Biology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA;
| | - Leisi Zhang
- Department of Systems Biology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA;
| | - Chun-Wei Chen
- Department of Systems Biology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA;
- City of Hope Comprehensive Cancer Center, Duarte, CA 91010, USA
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3
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Krasnov GS, Puzanov GA, Dashinimaev EB, Vishnyakova KS, Kondratieva TT, Chegodaev YS, Postnov AY, Senchenko VN, Yegorov YE. Tumor Suppressor Properties of Small C-Terminal Domain Phosphatases in Clear Cell Renal Cell Carcinoma. Int J Mol Sci 2023; 24:12986. [PMID: 37629167 PMCID: PMC10455398 DOI: 10.3390/ijms241612986] [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: 07/22/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) accounts for 80-90% of kidney cancers worldwide. Small C-terminal domain phosphatases CTDSP1, CTDSP2, and CTDSPL (also known as SCP1, 2, 3) are involved in the regulation of several important pathways associated with carcinogenesis. In various cancer types, these phosphatases may demonstrate either antitumor or oncogenic activity. Tumor-suppressive activity of these phosphatases in kidney cancer has been shown previously, but in general case, the antitumor activity may be dependent on the choice of cell line. In the present work, transfection of the Caki-1 cell line (ccRCC morphologic phenotype) with expression constructs containing the coding regions of these genes resulted in inhibition of cell growth in vitro in the case of CTDSP1 (p < 0.001) and CTDSPL (p < 0.05) but not CTDSP2. The analysis of The Cancer Genome Atlas (TCGA) data showed differential expression of some of CTDSP genes and of their target, RB1. These results were confirmed by quantitative RT-PCR using an independent sample of primary ccRCC tumors (n = 52). We observed CTDSPL downregulation and found a positive correlation of expression for two gene pairs: CTDSP1 and CTDSP2 (rs = 0.76; p < 0.001) and CTDSPL and RB1 (rs = 0.38; p < 0.05). Survival analysis based on TCGA data demonstrated a strong association of lower expression of CTDSP1, CTDSP2, CTDSPL, and RB1 with poor survival of ccRCC patients (p < 0.001). In addition, according to TCGA, CTDSP1, CTDSP2, and RB1 were differently expressed in two subtypes of ccRCC-ccA and ccB, characterized by different survival rates. These results confirm that CTDSP1 and CTDSPL have tumor suppressor properties in ccRCC and reflect their association with the more aggressive ccRCC phenotype.
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Affiliation(s)
- George S. Krasnov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (G.A.P.); (K.S.V.); (Y.S.C.); (V.N.S.)
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Grigory A. Puzanov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (G.A.P.); (K.S.V.); (Y.S.C.); (V.N.S.)
| | - Erdem B. Dashinimaev
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Pirogov Russian National Research Medical University, Ostrovitianov Street, 117997 Moscow, Russia;
| | - Khava S. Vishnyakova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (G.A.P.); (K.S.V.); (Y.S.C.); (V.N.S.)
| | - Tatiana T. Kondratieva
- Research Institute of Clinical Oncology, Blokhin National Medical Research Center of Oncology of the Ministry of Health, 115478 Moscow, Russia;
- Eurasian Federation of Oncology, 125080 Moscow, Russia
| | - Yegor S. Chegodaev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (G.A.P.); (K.S.V.); (Y.S.C.); (V.N.S.)
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Federal State Budgetary Scientific Institution “Petrovsky National Research Centre of Surgery”, 119991 Moscow, Russia;
| | - Anton Y. Postnov
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Federal State Budgetary Scientific Institution “Petrovsky National Research Centre of Surgery”, 119991 Moscow, Russia;
| | - Vera N. Senchenko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (G.A.P.); (K.S.V.); (Y.S.C.); (V.N.S.)
| | - Yegor E. Yegorov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia; (G.A.P.); (K.S.V.); (Y.S.C.); (V.N.S.)
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4
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Zhang KL, Li SM, Hou JY, Hong YH, Chen XX, Zhou CQ, Wu H, Zheng GH, Zeng CT, Wu HD, Fu JY, Wang T. Elabela, a Novel Peptide, Exerts Neuroprotective Effects Against Ischemic Stroke Through the APJ/miR-124-3p/CTDSP1/AKT Pathway. Cell Mol Neurobiol 2023:10.1007/s10571-023-01352-6. [PMID: 37106272 DOI: 10.1007/s10571-023-01352-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023]
Abstract
Elabela (ELA), which is the second endogenous peptide ligand of the apelin receptor (APJ) to be discovered, has been widely studied for potential use as a therapeutic peptide. However, its role in ischemic stroke (IS), which is a leading cause of disability and death worldwide and has limited therapeutic options, is uncertain. The aim of the present study was to investigate the beneficial effects of ELA on neuron survival after ischemia and the underlying molecular mechanisms. Primary cortical neurons were isolated from the cerebral cortex of pregnant C57BL/6J mice. Flow cytometry and immunofluorescence showed that ELA inhibited oxygen-glucose deprivation (OGD) -induced apoptosis and axonal damage in vitro. Additionally, analysis of the Gene Expression Omnibus database revealed that the expression of microRNA-124-3p (miR-124-3p) was decreased in blood samples from patients with IS, while the expression of C-terminal domain small phosphatase 1 (CTDSP1) was increased. These results indicated that miR-124-3p and CTDSP1 were related to ischemic stroke, and there might be a negative regulatory relationship between them. Then, we found that ELA significantly elevated miR-124-3p expression, suppressed CTDSP1 expression, and increased p-AKT expression by binding to the APJ receptor under OGD in vitro. A dual-luciferase reporter assay confirmed that CTDSP1 was a direct target of miR-124-3p. Furthermore, adenovirus-mediated overexpression of CTDSP1 exacerbated neuronal apoptosis and axonal damage and suppressed AKT phosphorylation, while treatment with ELA or miR-124-3p mimics reversed these effects. In conclusion, these results indicated that ELA could alleviate neuronal apoptosis and axonal damage by upregulating miR-124-3p and activating the CTDSP1/AKT signaling pathway. This study, for the first time, verified the protective effect of ELA against neuronal injury after ischemia and revealed the underlying mechanisms. We demonstrated the potential for the use of ELA as a therapeutic agent in the treatment of ischemic stroke.
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Grants
- No. JCYJ20190808101405466, JCYJ20210324115003008, JCYJ20220530144404009 the Shenzhen Fundamental Research Program
- No. JCYJ20190808101405466, JCYJ20210324115003008, JCYJ20220530144404009 the Shenzhen Fundamental Research Program
- No. FTWS2019001, FTWS2021016, FTWS2022018 the Futian District Health and Public Welfare Research Project of Shenzhen City
- No. FTWS2019001, FTWS2021016, FTWS2022018 the Futian District Health and Public Welfare Research Project of Shenzhen City
- No. 81070125, 81270213, 81670306 National Natural Science Foundation of China
- No. 2010B031600032, 2014A020211002 the Science and Technology Foundation in Guangdong Province
- No. 2017A030313503 the National Natural Science Foundation of Guangdong Province
- No. 201806020084 the Science and Technology Foundation in Guangzhou City
- No. 13ykzd16, 17ykjc18 the Fundamental Research Funds for the Central Universities
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Affiliation(s)
- Kang-Long Zhang
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Shuang-Mei Li
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Jing-Yu Hou
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Ying-Hui Hong
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Xu-Xiang Chen
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Chang-Qing Zhou
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Hao Wu
- Department of Emergency, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou, 510120, Guangdong, People's Republic of China
| | - Guang-Hui Zheng
- Department of Emergency, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou, 510120, Guangdong, People's Republic of China
| | - Chao-Tao Zeng
- Department of Emergency, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, Guangzhou, 510120, Guangdong, People's Republic of China
| | - Hai-Dong Wu
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Jia-Ying Fu
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China
| | - Tong Wang
- Department of Emergency, The Eighth Affiliated Hospital of Sun Yat-Sen University, Shenzhen, 518003, Guangdong, People's Republic of China.
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5
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Zhao C, Liu J, Xu Y, Guo J, Wang L, Chen L, Xu L, Dong G, Zheng W, Li Z, Cai H, Li S. MiR-574-5p promotes cell proliferation by negatively regulating small C-terminal domain phosphatase 1 in esophageal squamous cell carcinoma. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2022; 25:1243-1250. [PMID: 36311195 PMCID: PMC9588319 DOI: 10.22038/ijbms.2022.65886.14492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/06/2022] [Indexed: 11/20/2022]
Abstract
Objectives Esophageal cancer is one of the most common cancers with high incidence and mortality rates, especially in China. MicroRNA (miRNA) can be used as a prognostic marker for various human cancers. This study aims to detect suitable miRNA markers for esophageal squamous cell carcinoma (ESCC). Materials and Methods Our previous gene expression data of ESCC cells and the data from GSE43732 and GSE112840 were analyzed. The expression of miR-574-5p in ESCC patients and controls was analyzed by real-time quantitative PCR. The effect of miR-574-5p on proliferation was detected by real-time cell analysis (RTCA) and EdU proliferation assay after cell transfections. The target gene small C-terminal domain phosphatase 1 (CTDSP1) of miR-574-5p was validated by luciferase reporter assay and western blotting. Results In the current study, the bioinformatics analysis found miR-574-5p up-regulated in ESCC. The qPCR assay of 26 ESCC and 13 adjacent/ normal tissues confirmed these results. We further demonstrated that miR-574-5p overexpression promoted cell proliferation. Then the dual-luciferase reporter assay and the rescue experiment suggested that CTDSP1 was a direct target of miR-574-5p. Conclusion MiR-574-5p played an oncological role in ESCC by interacting and negatively regulating CTDSP1. These results provided a deeper understanding of the effect of miR-574-5p on ESCC.
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Affiliation(s)
- Chunming Zhao
- Department of Human Anatomy, Xuzhou Medical University, Xuzhou, Jiangsu, China,Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jialin Liu
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yong Xu
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jiamei Guo
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Liping Wang
- Department of Basic Pathology, Pathology College, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Linfeng Chen
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Lina Xu
- NGS Center, Hangzhou D.A. Medical Laboratory Co., Ltd., Hangzhou, Zhejiang, China
| | - Guokai Dong
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Wei Zheng
- Department of Basic Pathology, Pathology College, Qiqihar Medical University, Qiqihar, Heilongjiang, China
| | - Zhouru Li
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Hongxing Cai
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China,Corresponding authors: Shanshan Li. Department of Forensic Medicine, Xuzhou Medical University, 84 Huaihai Road, Xuzhou, Jiangsu, 221002, China. ; Hongxing Cai. Department of Forensic Medicine, Xuzhou Medical University, 84 Huaihai Road, Xuzhou, Jiangsu, 221002, China.
| | - Shanshan Li
- Jiangsu Medical Engineering Research Center of Gene Detection, Xuzhou Medical University, Xuzhou, Jiangsu, China,Department of Forensic Medicine, Xuzhou Medical University, Xuzhou, Jiangsu, China,Corresponding authors: Shanshan Li. Department of Forensic Medicine, Xuzhou Medical University, 84 Huaihai Road, Xuzhou, Jiangsu, 221002, China. ; Hongxing Cai. Department of Forensic Medicine, Xuzhou Medical University, 84 Huaihai Road, Xuzhou, Jiangsu, 221002, China.
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6
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Puzanov GA, Senchenko VN. SCP Phosphatases and Oncogenesis. Mol Biol 2021. [DOI: 10.1134/s0026893321030092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Blaustein M, Piegari E, Martínez Calejman C, Vila A, Amante A, Manese MV, Zeida A, Abrami L, Veggetti M, Guertin DA, van der Goot FG, Corvi MM, Colman-Lerner A. Akt Is S-Palmitoylated: A New Layer of Regulation for Akt. Front Cell Dev Biol 2021; 9:626404. [PMID: 33659252 PMCID: PMC7917195 DOI: 10.3389/fcell.2021.626404] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 01/25/2021] [Indexed: 11/13/2022] Open
Abstract
The protein kinase Akt/PKB participates in a great variety of processes, including translation, cell proliferation and survival, as well as malignant transformation and viral infection. In the last few years, novel Akt posttranslational modifications have been found. However, how these modification patterns affect Akt subcellular localization, target specificity and, in general, function is not thoroughly understood. Here, we postulate and experimentally demonstrate by acyl-biotin exchange (ABE) assay and 3H-palmitate metabolic labeling that Akt is S-palmitoylated, a modification related to protein sorting throughout subcellular membranes. Mutating cysteine 344 into serine blocked Akt S-palmitoylation and diminished its phosphorylation at two key sites, T308 and T450. Particularly, we show that palmitoylation-deficient Akt increases its recruitment to cytoplasmic structures that colocalize with lysosomes, a process stimulated during autophagy. Finally, we found that cysteine 344 in Akt1 is important for proper its function, since Akt1-C344S was unable to support adipocyte cell differentiation in vitro. These results add an unexpected new layer to the already complex Akt molecular code, improving our understanding of cell decision-making mechanisms such as cell survival, differentiation and death.
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Affiliation(s)
- Matías Blaustein
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina.,Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Estefanía Piegari
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina
| | - Camila Martínez Calejman
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States
| | - Antonella Vila
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina.,Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Analía Amante
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina.,Instituto de Biociencias, Biotecnología y Biología Traslacional (iB3), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María Victoria Manese
- Laboratorio de bioquímica y biología celular de parásitos, Instituto Tecnológico de Chascomús (IIB-INTECH), Universidad Nacional de San Martín (UNSAM) - CONICET, Chascomús, Argentina
| | - Ari Zeida
- Departamento de Bioquímica and Centro de Investigaciones Biomédicas (CEINBIO), Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Laurence Abrami
- Global Health Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Mariela Veggetti
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina
| | - David A Guertin
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, United States.,Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA, United States.,Lei Weibo Institute for Rare Diseases, University of Massachusetts Medical School, Worcester, MA, United States
| | - F Gisou van der Goot
- Global Health Institute, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - María Martha Corvi
- Laboratorio de bioquímica y biología celular de parásitos, Instituto Tecnológico de Chascomús (IIB-INTECH), Universidad Nacional de San Martín (UNSAM) - CONICET, Chascomús, Argentina
| | - Alejandro Colman-Lerner
- Departamento de Fisiología, Biología Molecular y Celular (DFBMC), Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.,Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-UBA, Buenos Aires, Argentina
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8
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Schianchi F, Glatz JFC, Navarro Gascon A, Nabben M, Neumann D, Luiken JJFP. Putative Role of Protein Palmitoylation in Cardiac Lipid-Induced Insulin Resistance. Int J Mol Sci 2020; 21:ijms21249438. [PMID: 33322406 PMCID: PMC7764417 DOI: 10.3390/ijms21249438] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/25/2022] Open
Abstract
In the heart, inhibition of the insulin cascade following lipid overload is strongly associated with contractile dysfunction. The translocation of fatty acid transporter CD36 (SR-B2) from intracellular stores to the cell surface is a hallmark event in the lipid-overloaded heart, feeding forward to intracellular lipid accumulation. Yet, the molecular mechanisms by which intracellularly arrived lipids induce insulin resistance is ill-understood. Bioactive lipid metabolites (diacyl-glycerols, ceramides) are contributing factors but fail to correlate with the degree of cardiac insulin resistance in diabetic humans. This leaves room for other lipid-induced mechanisms involved in lipid-induced insulin resistance, including protein palmitoylation. Protein palmitoylation encompasses the reversible covalent attachment of palmitate moieties to cysteine residues and is governed by protein acyl-transferases and thioesterases. The function of palmitoylation is to provide proteins with proper spatiotemporal localization, thereby securing the correct unwinding of signaling pathways. In this review, we provide examples of palmitoylations of individual signaling proteins to discuss the emerging role of protein palmitoylation as a modulator of the insulin signaling cascade. Second, we speculate how protein hyper-palmitoylations (including that of CD36), as they occur during lipid oversupply, may lead to insulin resistance. Finally, we conclude that the protein palmitoylation machinery may offer novel targets to fight lipid-induced cardiomyopathy.
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Affiliation(s)
- Francesco Schianchi
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The Netherlands; (F.S.); (J.F.C.G.); (A.N.G.); (M.N.)
| | - Jan F. C. Glatz
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The Netherlands; (F.S.); (J.F.C.G.); (A.N.G.); (M.N.)
- Department of Clinical Genetics, Maastricht University Medical Center+, 6202 AZ Maastricht, The Netherlands
| | - Artur Navarro Gascon
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The Netherlands; (F.S.); (J.F.C.G.); (A.N.G.); (M.N.)
| | - Miranda Nabben
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The Netherlands; (F.S.); (J.F.C.G.); (A.N.G.); (M.N.)
- Department of Clinical Genetics, Maastricht University Medical Center+, 6202 AZ Maastricht, The Netherlands
| | - Dietbert Neumann
- Department of Pathology, Maastricht University Medical Center+, 6202 AZ Maastricht, The Netherlands;
| | - Joost J. F. P. Luiken
- Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The Netherlands; (F.S.); (J.F.C.G.); (A.N.G.); (M.N.)
- Department of Clinical Genetics, Maastricht University Medical Center+, 6202 AZ Maastricht, The Netherlands
- Correspondence: ; Tel.: +31-43-388-1998
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Methods for Identification of Substrates/Inhibitors of FCP/SCP Type Protein Ser/Thr Phosphatases. Processes (Basel) 2020. [DOI: 10.3390/pr8121598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Protein phosphorylation is the most widespread type of post-translational modification and is properly controlled by protein kinases and phosphatases. Regarding the phosphorylation of serine (Ser) and threonine (Thr) residues, relatively few protein Ser/Thr phosphatases control the specific dephosphorylation of numerous substrates, in contrast with Ser/Thr kinases. Recently, protein Ser/Thr phosphatases were reported to have rigid substrate recognition and exert various biological functions. Therefore, identification of targeted proteins by individual protein Ser/Thr phosphatases is crucial to clarify their own biological functions. However, to date, information on the development of methods for identification of the substrates of protein Ser/Thr phosphatases remains scarce. In turn, substrate-trapping mutants are powerful tools to search the individual substrates of protein tyrosine (Tyr) phosphatases. This review focuses on the development of novel methods for the identification of Ser/Thr phosphatases, especially small C-terminal domain phosphatase 1 (Scp1), using peptide-displayed phage library with AlF4−/BeF3−, and discusses the identification of putative inhibitors.
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10
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Diao P, Wang X, Jia F, Kimura T, Hu X, Shirotori S, Nakamura I, Sato Y, Nakayama J, Moriya K, Koike K, Gonzalez FJ, Aoyama T, Tanaka N. A saturated fatty acid-rich diet enhances hepatic lipogenesis and tumorigenesis in HCV core gene transgenic mice. J Nutr Biochem 2020; 85:108460. [PMID: 32992072 DOI: 10.1016/j.jnutbio.2020.108460] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 05/25/2020] [Accepted: 06/16/2020] [Indexed: 02/07/2023]
Abstract
Previous studies suggested that high consumption of saturated fatty acid (SFA) is a risk factor for liver cancer. However, it remains unclear how dietary SFA affects liver tumorigenesis. This study aimed to investigate the impact of a SFA-rich diet on hepatic tumorigenesis using hepatitis C virus core gene transgenic (HCVcpTg) mice that spontaneously developed hepatic steatosis and tumors with aging. Male HCVcpTg mice were treated for 15 months with a purified control diet or SFA-rich diet prepared by replacing soybean oil in the control diet with hydrogenated coconut oil, and phenotypic changes were assessed. In this special diet, almost all dietary fatty acids were SFA. Long-term feeding of SFA-rich diet to HCVcpTg mice increased hepatic steatosis, liver dysfunction, and the prevalence of liver tumors, likely due to stimulation of de novo lipogenesis, activation of the pro-inflammatory and pro-oncogenic transcription factor nuclear factor-kappa B (NF-κB), enhanced c-Jun N-terminal kinase/activator protein 1 (JNK/AP-1) signaling and induction of the oncogenes cyclin D1 and p62/sequestosome 1. The SFA-rich diet did not affect liver fibrosis or autophagy. Collectively, long-term SFA-rich diet consumption promoted hepatic tumorigenesis mainly through activation of lipogenesis, NF-κB, and JNK/AP-1 signaling. We therefore propose that HCV-infected patients should avoid excessive intake of SFA-rich foods to prevent liver cancer.
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Affiliation(s)
- Pan Diao
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan
| | - Xiaojing Wang
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan; Department of Gastroenterology, Lishui Hospital, Zhejiang University School of Medicine, Lishui, Zhejiang, People's Republic of China
| | - Fangping Jia
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takefumi Kimura
- Department of Gastroenterology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Xiao Hu
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan; Department of Pathophysiology, Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Saki Shirotori
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan
| | - Ibuki Nakamura
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan
| | - Yoshiko Sato
- Department of Molecular Pathology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Jun Nakayama
- Department of Molecular Pathology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Kyoji Moriya
- Department of Infection Control and Prevention, The University of Tokyo, Tokyo, Japan
| | - Kazuhiko Koike
- Department of Gastroenterology, The University of Tokyo, Tokyo, Japan
| | - Frank J Gonzalez
- Laboratory of Metabolism, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Toshifumi Aoyama
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan
| | - Naoki Tanaka
- Department of Metabolic Regulation, Shinshu University School of Medicine, Matsumoto, Japan; Research Center for Social Systems, Shinshu University, Matsumoto, Japan.
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Rallabandi HR, Ganesan P, Kim YJ. Targeting the C-Terminal Domain Small Phosphatase 1. Life (Basel) 2020; 10:life10050057. [PMID: 32397221 PMCID: PMC7281111 DOI: 10.3390/life10050057] [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: 03/29/2020] [Revised: 05/05/2020] [Accepted: 05/07/2020] [Indexed: 12/15/2022] Open
Abstract
The human C-terminal domain small phosphatase 1 (CTDSP1/SCP1) is a protein phosphatase with a conserved catalytic site of DXDXT/V. CTDSP1’s major activity has been identified as dephosphorylation of the 5th Ser residue of the tandem heptad repeat of the RNA polymerase II C-terminal domain (RNAP II CTD). It is also implicated in various pivotal biological activities, such as acting as a driving factor in repressor element 1 (RE-1)-silencing transcription factor (REST) complex, which silences the neuronal genes in non-neuronal cells, G1/S phase transition, and osteoblast differentiation. Recent findings have denoted that negative regulation of CTDSP1 results in suppression of cancer invasion in neuroglioma cells. Several researchers have focused on the development of regulating materials of CTDSP1, due to the significant roles it has in various biological activities. In this review, we focused on this emerging target and explored the biological significance, challenges, and opportunities in targeting CTDSP1 from a drug designing perspective.
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12
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Therapeutic targeting of protein S-acylation for the treatment of disease. Biochem Soc Trans 2019; 48:281-290. [DOI: 10.1042/bst20190707] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/04/2019] [Accepted: 12/09/2019] [Indexed: 12/13/2022]
Abstract
The post-translational modification protein S-acylation (commonly known as palmitoylation) plays a critical role in regulating a wide range of biological processes including cell growth, cardiac contractility, synaptic plasticity, endocytosis, vesicle trafficking, membrane transport and biased-receptor signalling. As a consequence, zDHHC-protein acyl transferases (zDHHC-PATs), enzymes that catalyse the addition of fatty acid groups to specific cysteine residues on target proteins, and acyl proteins thioesterases, proteins that hydrolyse thioester linkages, are important pharmaceutical targets. At present, no therapeutic drugs have been developed that act by changing the palmitoylation status of specific target proteins. Here, we consider the role that palmitoylation plays in the development of diseases such as cancer and detail possible strategies for selectively manipulating the palmitoylation status of specific target proteins, a necessary first step towards developing clinically useful molecules for the treatment of disease.
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13
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Identification of a Specific Inhibitor of Human Scp1 Phosphatase Using the Phosphorylation Mimic Phage Display Method. Catalysts 2019. [DOI: 10.3390/catal9100842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Protein phosphatases are divided into tyrosine (Tyr) phosphatases and serine/threonine (Ser/Thr) phosphatases. While substrate trapping mutants are frequently used to identify substrates of Tyr phosphatases, a rapid and simple method to identify Ser/Thr phosphatase substrates is yet to be developed. The TFIIF-associating component of RNA polymerase II C-terminal domain (CTD) phosphatase/small CTD phosphatase (FCP/SCP) phosphatase family is one of the three types of Ser/Thr protein phosphatases. Defects in these phosphatases are correlated with the occurrence of various diseases such as cancer and neuropathy. Recently, we developed phosphorylation mimic phage display (PMPD) method with AlF4−, a methodology to identify substrates for FCP/SCP type Ser/Thr phosphatase Scp1. Here, we report a PMPD method using BeF3− to identify novel substrate peptides bound to Scp1. After screening peptide phages, we identified peptides that bound to Scp1 in a BeF3−-dependent manner. Synthetic phosphopeptide BeM12-1, the sequence of which was isolated at the highest frequency, directly bound to Scp1. The binding was inhibited by adding BeF3−, indicating that the peptide binds to the active center of catalytic site in Scp1. The phosphorylated BeM12-1 worked as a competitive inhibitor of Scp1. Thus, PMPD method may be applicable for the identification of novel substrates and inhibitors of the FCP/SCP phosphatase family.
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Dynamic palmitoylation regulates trafficking of K channel interacting protein 2 (KChIP2) across multiple subcellular compartments in cardiac myocytes. J Mol Cell Cardiol 2019; 135:1-9. [PMID: 31362018 DOI: 10.1016/j.yjmcc.2019.07.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 06/26/2019] [Accepted: 07/26/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND K channel interacting protein 2 (KChIP2), initially cloned as Kv4 channel modulator, is a multi-tasking protein. In addition to modulating several cardiac ion channels at the plasma membrane, it can also modulate microRNA transcription inside nuclei, and interact with presenilins to modulate Ca release through RyR2 in the cytoplasm. However, the mechanism regulating its subcellular distribution is not clear. OBJECTIVE We tested whether palmitoylation drives KChIP2 trafficking and distribution in cells, and whether the distribution pattern of KChIP2 in cardiac myocytes is sensitive to cellular milieu. METHOD We conducted imaging and biochemical experiments on palmitoylatable and unpalmitoylatable KChIP2 variants expressed in COS-7 cells and in cardiomyocytes, and on native KChIP2 in myocytes. RESULTS In COS-7 cells, palmitoylatable KChIP2 clustered to plasma membrane, while unpalmitoylatable KChIP2 exhibited higher cytoplasmic mobility and faster nuclear entry. The same differences in distribution and mobility were observed when these KChIP2 variants were expressed in cardiac myocytes, indicating that the palmitoylation-dependent distribution and trafficking are intrinsic properties of KChIP2. Importantly, acute stress in a rat model of cardiac arrest/resuscitation induced changes in native KChIP2 resembling those of KChIP2 depalmitoylation, promoting KChIP2 nuclear entry. CONCLUSION The palmitoylation status of KChIP2 determines its subcellular distribution in cardiac myocytes. Stress promotes nuclear entry of KChIP2, diverting it from ion channel modulation at the plasma membrane to other functions in the nuclear compartment.
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Burkholder NT, Mayfield JE, Yu X, Irani S, Arce DK, Jiang F, Matthews WL, Xue Y, Zhang YJ. Phosphatase activity of small C-terminal domain phosphatase 1 (SCP1) controls the stability of the key neuronal regulator RE1-silencing transcription factor (REST). J Biol Chem 2018; 293:16851-16861. [PMID: 30217818 DOI: 10.1074/jbc.ra118.004722] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/20/2018] [Indexed: 02/03/2023] Open
Abstract
The RE1-silencing transcription factor (REST) is the major scaffold protein for assembly of neuronal gene silencing complexes that suppress gene transcription through regulating the surrounding chromatin structure. REST represses neuronal gene expression in stem cells and non-neuronal cells, but it is minimally expressed in neuronal cells to ensure proper neuronal development. Dysregulation of REST function has been implicated in several cancers and neurological diseases. Modulating REST gene silencing is challenging because cellular and developmental differences can affect its activity. We therefore considered the possibility of modulating REST activity through its regulatory proteins. The human small C-terminal domain phosphatase 1 (SCP1) regulates the phosphorylation state of REST at sites that function as REST degradation checkpoints. Using kinetic analysis and direct visualization with X-ray crystallography, we show that SCP1 dephosphorylates two degron phosphosites of REST with a clear preference for phosphoserine 861 (pSer-861). Furthermore, we show that SCP1 stabilizes REST protein levels, which sustains REST's gene silencing function in HEK293 cells. In summary, our findings strongly suggest that REST is a bona fide substrate for SCP1 in vivo and that SCP1 phosphatase activity protects REST against degradation. These observations indicate that targeting REST via its regulatory protein SCP1 can modulate its activity and alter signaling in this essential developmental pathway.
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Affiliation(s)
| | | | - Xiaohua Yu
- the Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China, and
| | | | | | - Faqin Jiang
- the School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | - Yuanchao Xue
- the Key Laboratory of RNA Biology, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China, and
| | - Yan Jessie Zhang
- From the Departments of Molecular Biosciences and .,Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, Texas 78712
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Carluccio AV, Prigigallo MI, Rosas-Diaz T, Lozano-Duran R, Stavolone L. S-acylation mediates Mungbean yellow mosaic virus AC4 localization to the plasma membrane and in turns gene silencing suppression. PLoS Pathog 2018; 14:e1007207. [PMID: 30067843 PMCID: PMC6089456 DOI: 10.1371/journal.ppat.1007207] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 08/13/2018] [Accepted: 07/11/2018] [Indexed: 11/19/2022] Open
Abstract
RNA silencing plays a critical role in plant resistance against viruses. To counteract host defense, plant viruses encode viral suppressors of RNA silencing (VSRs) that interfere with the cellular silencing machinery through various mechanisms not always well understood. We examined the role of Mungbean yellow mosaic virus (MYMV) AC4 and showed that it is essential for infectivity but not for virus replication. It acts as a determinant of pathogenicity and counteracts virus induced gene silencing by strongly suppressing the systemic phase of silencing whereas it does not interfere with local production of siRNA. We demonstrate the ability of AC4 to bind native 21-25 nt siRNAs in vitro by electrophoretic mobility shift assay. While most of the known VSRs have cytoplasmic localization, we observed that despite its hydrophilic nature and the absence of trans-membrane domain, MYMV AC4 specifically accumulates to the plasma membrane (PM). We show that AC4 binds to PM via S-palmitoylation, a process of post-translational modification regulating membrane-protein interactions, not known for plant viral protein before. When localized to the PM, AC4 strongly suppresses systemic silencing whereas its delocalization impairs VSR activity of the protein. We also show that AC4 interacts with the receptor-like kinase (RLK) BARELY ANY MERISTEM 1 (BAM1), a positive regulator of the cell-to-cell movement of RNAi. The absolute requirement of PM localization for direct silencing suppression activity of AC4 is novel and intriguing. We discuss a possible model of action: palmitoylated AC4 anchors to the PM by means of palmitate to acquire the optimal conformation to bind siRNAs, hinder their systemic movement and hence suppress the spread of the PTGS signal in the plant.
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Affiliation(s)
- Anna Vittoria Carluccio
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle ricerche, Bari, Italia
- International Institute of Tropical Agriculture, Ibadan, Nigeria
| | - Maria Isabella Prigigallo
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle ricerche, Bari, Italia
| | - Tabata Rosas-Diaz
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences (CAS), Shanghai, China
| | - Rosa Lozano-Duran
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences (CAS), Shanghai, China
- Chinese Academy of Sciences–John Innes Centre Center of Excellence for Plant and Microbial Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Livia Stavolone
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle ricerche, Bari, Italia
- International Institute of Tropical Agriculture, Ibadan, Nigeria
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