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Sanchez-Lopez I, Orantos-Aguilera Y, Pozo-Guisado E, Alvarez-Barrientos A, Lilla S, Zanivan S, Lachaud C, Martin-Romero FJ. STIM1 translocation to the nucleus protects cells from DNA damage. Nucleic Acids Res 2024; 52:2389-2415. [PMID: 38224453 PMCID: PMC10954485 DOI: 10.1093/nar/gkae001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 10/30/2023] [Accepted: 01/01/2024] [Indexed: 01/16/2024] Open
Abstract
DNA damage represents a challenge for cells, as this damage must be eliminated to preserve cell viability and the transmission of genetic information. To reduce or eliminate unscheduled chemical modifications in genomic DNA, an extensive signaling network, known as the DNA damage response (DDR) pathway, ensures this repair. In this work, and by means of a proteomic analysis aimed at studying the STIM1 protein interactome, we have found that STIM1 is closely related to the protection from endogenous DNA damage, replicative stress, as well as to the response to interstrand crosslinks (ICLs). Here we show that STIM1 has a nuclear localization signal that mediates its translocation to the nucleus, and that this translocation and the association of STIM1 to chromatin increases in response to mitomycin-C (MMC), an ICL-inducing agent. Consequently, STIM1-deficient cell lines show higher levels of basal DNA damage, replicative stress, and increased sensitivity to MMC. We show that STIM1 normalizes FANCD2 protein levels in the nucleus, which explains the increased sensitivity of STIM1-KO cells to MMC. This study not only unveils a previously unknown nuclear function for the endoplasmic reticulum protein STIM1 but also expands our understanding of the genes involved in DNA repair.
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Affiliation(s)
- Irene Sanchez-Lopez
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Universidad de Extremadura, Badajoz 06006, Spain
- Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, Badajoz 06006, Spain
| | - Yolanda Orantos-Aguilera
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Universidad de Extremadura, Badajoz 06006, Spain
- Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, Badajoz 06006, Spain
| | - Eulalia Pozo-Guisado
- Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, Badajoz 06006, Spain
- Department of Cell Biology, School of Medicine, Universidad de Extremadura, Badajoz 06006, Spain
| | | | - Sergio Lilla
- CRUK Scotland Institute, Switchback Road, Glasgow G61 1BD, UK
| | - Sara Zanivan
- CRUK Scotland Institute, Switchback Road, Glasgow G61 1BD, UK
- School of Cancer Sciences, University of Glasgow, Switchback Road, Glasgow G61 1QH, UK
| | - Christophe Lachaud
- Cancer Research Centre of Marseille, Aix-Marseille Univ, Inserm, CNRS, Institut Paoli Calmettes, CRCM, Marseille, France
- OPALE Carnot Institute, Paris, France
| | - Francisco Javier Martin-Romero
- Department of Biochemistry and Molecular Biology, School of Life Sciences, Universidad de Extremadura, Badajoz 06006, Spain
- Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, Badajoz 06006, Spain
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Pascual-Caro C, Orantos-Aguilera Y, Sanchez-Lopez I, de Juan-Sanz J, Parys JB, Area-Gomez E, Pozo-Guisado E, Martin-Romero FJ. STIM1 Deficiency Leads to Specific Down-Regulation of ITPR3 in SH-SY5Y Cells. Int J Mol Sci 2020; 21:ijms21186598. [PMID: 32916960 PMCID: PMC7555297 DOI: 10.3390/ijms21186598] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/05/2020] [Accepted: 09/07/2020] [Indexed: 12/19/2022] Open
Abstract
STIM1 is an endoplasmic reticulum (ER) protein that modulates the activity of a number of Ca2+ transport systems. By direct physical interaction with ORAI1, a plasma membrane Ca2+ channel, STIM1 activates the ICRAC current, whereas the binding with the voltage-operated Ca2+ channel CaV1.2 inhibits the current through this latter channel. In this way, STIM1 is a key regulator of Ca2+ signaling in excitable and non-excitable cells, and altered STIM1 levels have been reported to underlie several pathologies, including immunodeficiency, neurodegenerative diseases, and cancer. In both sporadic and familial Alzheimer’s disease, a decrease of STIM1 protein levels accounts for the alteration of Ca2+ handling that compromises neuronal cell viability. Using SH-SY5Y cells edited by CRISPR/Cas9 to knockout STIM1 gene expression, this work evaluated the molecular mechanisms underlying the cell death triggered by the deficiency of STIM1, demonstrating that STIM1 is a positive regulator of ITPR3 gene expression. ITPR3 (or IP3R3) is a Ca2+ channel enriched at ER-mitochondria contact sites where it provides Ca2+ for transport into the mitochondria. Thus, STIM1 deficiency leads to a strong reduction of ITPR3 transcript and ITPR3 protein levels, a consequent decrease of the mitochondria free Ca2+ concentration ([Ca2+]mit), reduction of mitochondrial oxygen consumption rate, and decrease in ATP synthesis rate. All these values were normalized by ectopic expression of ITPR3 in STIM1-KO cells, providing strong evidence for a new mode of regulation of [Ca2+]mit mediated by the STIM1-ITPR3 axis.
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Affiliation(s)
- Carlos Pascual-Caro
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology and Biomarkers, University of Extremadura, 06006 Badajoz, Spain; (C.P.-C.); (Y.O.-A.); (I.S.-L.)
| | - Yolanda Orantos-Aguilera
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology and Biomarkers, University of Extremadura, 06006 Badajoz, Spain; (C.P.-C.); (Y.O.-A.); (I.S.-L.)
| | - Irene Sanchez-Lopez
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology and Biomarkers, University of Extremadura, 06006 Badajoz, Spain; (C.P.-C.); (Y.O.-A.); (I.S.-L.)
| | - Jaime de Juan-Sanz
- Sorbonne Universités and Institut du Cerveau et de la Moelle Epinière (ICM) - Hôpital Pitié-Salpêtrière, Inserm, CNRS, 75013 Paris, France;
| | - Jan B. Parys
- Department of Cellular and Molecular Medicine, Leuven Kanker Instituut, KU Leuven, B-3000 Leuven, Belgium;
| | - Estela Area-Gomez
- Department of Neurology, Columbia University Medical Center, New York, NY 10032-3748, USA;
| | - Eulalia Pozo-Guisado
- Department of Cell Biology, School of Medicine and Institute of Molecular Pathology and Biomarkers, University of Extremadura, 06006 Badajoz, Spain;
| | - Francisco Javier Martin-Romero
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology and Biomarkers, University of Extremadura, 06006 Badajoz, Spain; (C.P.-C.); (Y.O.-A.); (I.S.-L.)
- Correspondence: ; Tel.: +34-924-489-971
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Lopez-Guerrero AM, Espinosa-Bermejo N, Sanchez-Lopez I, Macartney T, Pascual-Caro C, Orantos-Aguilera Y, Rodriguez-Ruiz L, Perez-Oliva AB, Mulero V, Pozo-Guisado E, Martin-Romero FJ. RAC1-Dependent ORAI1 Translocation to the Leading Edge Supports Lamellipodia Formation and Directional Persistence. Sci Rep 2020; 10:6580. [PMID: 32313105 PMCID: PMC7171199 DOI: 10.1038/s41598-020-63353-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/26/2020] [Indexed: 12/18/2022] Open
Abstract
Tumor invasion requires efficient cell migration, which is achieved by the generation of persistent and polarized lamellipodia. The generation of lamellipodia is supported by actin dynamics at the leading edge where a complex of proteins known as the WAVE regulatory complex (WRC) promotes the required assembly of actin filaments to push the front of the cell ahead. By using an U2OS osteosarcoma cell line with high metastatic potential, proven by a xenotransplant in zebrafish larvae, we have studied the role of the plasma membrane Ca2+ channel ORAI1 in this process. We have found that epidermal growth factor (EGF) triggered an enrichment of ORAI1 at the leading edge, where colocalized with cortactin (CTTN) and other members of the WRC, such as CYFIP1 and ARP2/3. ORAI1-CTTN co-precipitation was sensitive to the inhibition of the small GTPase RAC1, an upstream activator of the WRC. RAC1 potentiated ORAI1 translocation to the leading edge, increasing the availability of surface ORAI1 and increasing the plasma membrane ruffling. The role of ORAI1 at the leading edge was studied in genetically engineered U2OS cells lacking ORAI1 expression that helped us to prove the key role of this Ca2+ channel on lamellipodia formation, lamellipodial persistence, and cell directness, which are required for tumor cell invasiveness in vivo.
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Affiliation(s)
- Aida M Lopez-Guerrero
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain
| | - Noelia Espinosa-Bermejo
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain
| | - Irene Sanchez-Lopez
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain
| | - Thomas Macartney
- MRC- Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, DD1 5EH, Scotland, United Kingdom
| | - Carlos Pascual-Caro
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain
| | - Yolanda Orantos-Aguilera
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain
| | - Lola Rodriguez-Ruiz
- Department of Cell Biology and Histology, University of Murcia, IMIB-Arrixaca, Murcia, 30100, Spain
| | - Ana B Perez-Oliva
- Department of Cell Biology and Histology, University of Murcia, IMIB-Arrixaca, Murcia, 30100, Spain
| | - Victoriano Mulero
- Department of Cell Biology and Histology, University of Murcia, IMIB-Arrixaca, Murcia, 30100, Spain
| | - Eulalia Pozo-Guisado
- Department of Cell Biology, School of Medicine and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain.
| | - Francisco Javier Martin-Romero
- Department of Biochemistry and Molecular Biology, School of Life Sciences and Institute of Molecular Pathology Biomarkers, University of Extremadura, Badajoz, 06006, Spain.
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