1
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Sanchez W, Lindsay S, Li Y. Modeling the Annexin A1-S100A11 heterotetramer: a molecular dynamics investigation of structure and correlated motion. J Biomol Struct Dyn 2024; 42:2825-2833. [PMID: 37194290 PMCID: PMC10654263 DOI: 10.1080/07391102.2023.2212804] [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: 02/09/2023] [Accepted: 04/20/2023] [Indexed: 05/18/2023]
Abstract
Annexin A1 (A1) has been shown to form a tetrameric complex (A1t) with S100A11 which is implicated in calcium homeostasis and EGFR pathways. In this work, a full-length model of the A1t was generated for the first time. Multiple molecular dynamics simulations were performed on the complete A1t model for several hundred nanoseconds each to assess the structure and dynamics of A1t. These simulations yielded three structures for the A1 N-terminus (ND) which were identified via principal component analysis. The orientations and interactions of the first 11 A1-ND residues for all three structures were conserved, and their binding modes were strikingly similar to those of the Annexin A2 N-terminus in the Annexin A2-p11 tetramer. In this study, we provided detailed atomistic information for the A1t. Strong interactions were identified within the A1t between the A1-ND and both S100A11 monomers. Residues M3, V4, S5, E6, L8, K9, W12, E15, and E18 of A1 were the strongest interactions between A1 and the S100A11 dimer. The different conformations of the A1t were attributed to the interaction between W12 of the A1-ND with M63 of S100A11 which caused a kink in the A1-ND. Cross-correlation analysis revealed strong correlated motion throughout the A1t. Strong positive correlation was observed between the ND and S100A11 in all simulations regardless of conformation. This work suggests that the stable binding of the first 11 residues of A1-ND to S100A11 is potentially a theme for Annexin-S100 complexes and that the flexibility of the A1-ND allows for multiple conformations of the A1t.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Wesley Sanchez
- Department of Chemistry, East Carolina University, Greenville, NC, USA
| | - Samuel Lindsay
- Department of Chemistry, East Carolina University, Greenville, NC, USA
| | - Yumin Li
- Department of Chemistry, East Carolina University, Greenville, NC, USA
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2
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Macyszyn J, Chyży P, Burmistrz M, Lobka M, Miszkiewicz J, Wojciechowska M, Trylska J. Structural dynamics influences the antibacterial activity of a cell-penetrating peptide (KFF) 3K. Sci Rep 2023; 13:14826. [PMID: 37684254 PMCID: PMC10491836 DOI: 10.1038/s41598-023-38745-y] [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: 03/17/2023] [Accepted: 07/13/2023] [Indexed: 09/10/2023] Open
Abstract
Given the widespread demand for novel antibacterial agents, we modified a cell-penetrating peptide (KFF)3K to transform it into an antibacterial peptide. Namely, we inserted a hydrocarbon staple into the (KFF)3K sequence to induce and stabilize its membrane-active secondary structure. The staples were introduced at two positions, (KFF)3K[5-9] and (KFF)3K[2-6], to retain the initial amphipathic character of the unstapled peptide. The stapled analogues are protease resistant contrary to (KFF)3K; 90% of the stapled (KFF)3K[5-9] peptide remained undigested after incubation in chymotrypsin solution. The stapled peptides showed antibacterial activity (with minimal inhibitory concentrations in the range of 2-16 µM) against various Gram-positive and Gram-negative strains, contrary to unmodified (KFF)3K, which had no antibacterial effect against any strain at concentrations up to 32 µM. Also, both stapled peptides adopted an α-helical structure in the buffer and micellar environment, contrary to a mostly undefined structure of the unstapled (KFF)3K in the buffer. We found that the antibacterial activity of (KFF)3K analogues is related to their disruptive effect on cell membranes and we showed that by stapling this cell-penetrating peptide, we can induce its antibacterial character.
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Affiliation(s)
- Julia Macyszyn
- Centre of New Technologies, University of Warsaw, Warsaw, Poland
| | - Piotr Chyży
- Centre of New Technologies, University of Warsaw, Warsaw, Poland
| | - Michał Burmistrz
- Centre of New Technologies, University of Warsaw, Warsaw, Poland
| | - Małgorzata Lobka
- Centre of New Technologies, University of Warsaw, Warsaw, Poland
- Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
| | - Joanna Miszkiewicz
- Centre of New Technologies, University of Warsaw, Warsaw, Poland
- College of Inter-Faculty Individual Studies in Mathematics and Natural Sciences, University of Warsaw, Warsaw, Poland
| | | | - Joanna Trylska
- Centre of New Technologies, University of Warsaw, Warsaw, Poland.
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3
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Romero-Zamora D, Hayashi MT. A non-catalytic N-terminus domain of WRN prevents mitotic telomere deprotection. Sci Rep 2023; 13:645. [PMID: 36635307 PMCID: PMC9837040 DOI: 10.1038/s41598-023-27598-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 01/04/2023] [Indexed: 01/14/2023] Open
Abstract
Telomeric ends form a loop structure (T-loop) necessary for the repression of ATM kinase activation throughout the normal cell cycle. However, cells undergoing a prolonged mitotic arrest are prone to lose the T-loop, resulting in Aurora B kinase-dependent mitotic telomere deprotection, which was proposed as an anti-tumor mechanism that eliminates precancerous cells from the population. The mechanism of mitotic telomere deprotection has not been elucidated. Here, we show that WRN, a RECQ helicase family member, can suppress mitotic telomere deprotection independently of its exonuclease and helicase activities. Truncation of WRN revealed that N-terminus amino acids 168-333, a region that contains a coiled-coil motif, is sufficient to suppress mitotic telomere deprotection without affecting both mitotic Aurora B-dependent spindle checkpoint and ATM kinase activity. The suppressive activity of the WRN168-333 fragment is diminished in cells partially depleted of TRF2, while WRN is required for complete suppression of mitotic telomere deprotection by TRF2 overexpression. Finally, we found that phosphomimetic but not alanine mutations of putative Aurora B target sites in the WRN168-333 fragment abolished its suppressive effect. Our findings reveal a non-enzymatic function of WRN, which may be regulated by phosphorylation in cells undergoing mitotic arrest. We propose that WRN enhances the protective function of TRF2 to counteract the hypothetical pathway that resolves the mitotic T-loop.
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Affiliation(s)
- Diana Romero-Zamora
- grid.258799.80000 0004 0372 2033Graduate School of Biostudies, Kyoto University, Yoshida-Konoe, Sakyo, Kyoto, 606-8501 Japan ,grid.258799.80000 0004 0372 2033IFOM-KU Joint Research Laboratory, Graduate School of Medicine, Kyoto University, Yoshida-Konoe, Sakyo, Kyoto, 606-8501 Japan
| | - Makoto T. Hayashi
- grid.258799.80000 0004 0372 2033IFOM-KU Joint Research Laboratory, Graduate School of Medicine, Kyoto University, Yoshida-Konoe, Sakyo, Kyoto, 606-8501 Japan ,IFOM ETS, The AIRC Institute of Molecular Oncology, Via Adamello 16, 20139 Milan, Italy
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4
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Canales Coutiño B, Mayor R. Neural crest mechanosensors: Seeing old proteins in a new light. Dev Cell 2022; 57:1792-1801. [PMID: 35901790 DOI: 10.1016/j.devcel.2022.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/26/2022] [Accepted: 07/05/2022] [Indexed: 11/25/2022]
Abstract
Mechanical forces exerted on neural crest cells control their collective migration and differentiation. This perspective discusses our current understanding of neural crest mechanotransduction during cell migration and differentiation. Additionally, we describe proteins that have mechanosensitive functions in other systems, such as mechanosensitive G-protein-coupled receptors, mechanosensitive ion channels, cell-cell adhesion, and cell-matrix-interacting proteins, and highlight that these same proteins have in the past been studied in neural crest development from a purely signaling point of view. We propose that future studies elucidate the mechanosensitive functions these receptors may play in neural crest development and integrate this with their known molecular role.
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Affiliation(s)
- Brenda Canales Coutiño
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK
| | - Roberto Mayor
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, UK.
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5
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Lichocka M, Krzymowska M, Górecka M, Hennig J. Arabidopsis annexin 5 is involved in maintenance of pollen membrane integrity and permeability. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:94-109. [PMID: 34522949 DOI: 10.1093/jxb/erab419] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
In Arabidopsis, a dry stigma surface enables a gradual hydration of pollen grains by a controlled release of water. Occasionally the grains may be exposed to extreme precipitations that cause rapid water influx and swelling, eventually leading to pollen membrane rupture. In metazoans, calcium- and phospholipid-binding proteins, referred to as annexins, participate in the repair of plasma membrane damages. It remains unclear, however, how this process is conducted in plants. Here, we examined whether plant annexin 5 (ANN5), the most abundant member of the annexin family in pollen, is involved in the restoration of pollen membrane integrity. We analyzed the cellular dynamics of ANN5 in pollen grains undergoing hydration in favorable or stress conditions. We observed a transient association of ANN5 with the pollen membrane during in vitro hydration that did not occur in the pollen grains being hydrated on the stigma. To simulate a rainfall, we performed spraying of the pollinated stigma with deionized water that induced ANN5 accumulation at the pollen membrane. Interestingly, calcium or magnesium application affected pollen membrane properties differently, causing rupture or shrinkage of pollen membrane, respectively. Both treatments, however, induced ANN5 recruitment to the pollen membrane. Our data suggest a model in which ANN5 is involved in the maintenance of membrane integrity in pollen grains exposed to osmotic or ionic imbalances.
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Affiliation(s)
- Małgorzata Lichocka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland
| | - Magdalena Krzymowska
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland
| | - Magdalena Górecka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland
| | - Jacek Hennig
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Pawinskiego 5a, 02-106 Warsaw, Poland
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6
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Jiang ZJ, Li W, Yao LH, Saed B, Rao Y, Grewe BS, McGinley A, Varga K, Alford S, Hu YS, Gong LW. TRPM7 is critical for short-term synaptic depression by regulating synaptic vesicle endocytosis. eLife 2021; 10:e66709. [PMID: 34569930 PMCID: PMC8516418 DOI: 10.7554/elife.66709] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 09/10/2021] [Indexed: 12/15/2022] Open
Abstract
Transient receptor potential melastatin 7 (TRPM7) contributes to a variety of physiological and pathological processes in many tissues and cells. With a widespread distribution in the nervous system, TRPM7 is involved in animal behaviors and neuronal death induced by ischemia. However, the physiological role of TRPM7 in central nervous system (CNS) neuron remains unclear. Here, we identify endocytic defects in neuroendocrine cells and neurons from TRPM7 knockout (KO) mice, indicating a role of TRPM7 in synaptic vesicle endocytosis. Our experiments further pinpoint the importance of TRPM7 as an ion channel in synaptic vesicle endocytosis. Ca2+ imaging detects a defect in presynaptic Ca2+ dynamics in TRPM7 KO neuron, suggesting an importance of Ca2+ influx via TRPM7 in synaptic vesicle endocytosis. Moreover, the short-term depression is enhanced in both excitatory and inhibitory synaptic transmissions from TRPM7 KO mice. Taken together, our data suggests that Ca2+ influx via TRPM7 may be critical for short-term plasticity of synaptic strength by regulating synaptic vesicle endocytosis in neurons.
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Affiliation(s)
- Zhong-Jiao Jiang
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
| | - Wenping Li
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
| | - Li-Hua Yao
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
- School of Life Science, Jiangxi Science & Technology Normal UniversityNanchangChina
| | - Badeia Saed
- Department of Chemistry, University of Illinois at ChicagoChicagoUnited States
| | - Yan Rao
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
| | - Brian S Grewe
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
| | - Andrea McGinley
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
| | - Kelly Varga
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
- Department of Biological Sciences, University of North Texas at DallasDallasUnited States
| | - Simon Alford
- Department of Anatomy and Cell Biology, University of Illinois at ChicagoChicagoUnited States
| | - Ying S Hu
- Department of Chemistry, University of Illinois at ChicagoChicagoUnited States
| | - Liang-Wei Gong
- Department of Biological Sciences, University of Illinois at ChicagoChicagoUnited States
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7
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Liang HY, Chen Y, Wei X, Ma GG, Ding J, Lu C, Zhou RP, Hu W. Immunomodulatory functions of TRPM7 and its implications in autoimmune diseases. Immunology 2021; 165:3-21. [PMID: 34558663 DOI: 10.1111/imm.13420] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 08/17/2021] [Accepted: 09/14/2021] [Indexed: 12/18/2022] Open
Abstract
An autoimmune disease is an inappropriate response to one's tissues due to a break in immune tolerance and exposure to self-antigens. It often leads to structural and functional damage to organs and systemic disorders. To date, there are no effective interventions to prevent the progression of autoimmune diseases. Hence, there is an urgent need for new treatment targets. TRPM7 is an enzyme-coupled, transient receptor ion channel of the subfamily M that plays a vital role in pathologic and physiologic conditions. While TRPM7 is constitutively activated under certain conditions, it can regulate cell migration, polarization, proliferation and cytokine secretion. However, a growing body of evidence highlights the critical role of TRPM7 in autoimmune diseases, including rheumatoid arthritis, multiple sclerosis and diabetes. Herein, we present (a) a review of the channel kinase properties of TRPM7 and its pharmacological properties, (b) discuss the role of TRPM7 in immune cells (neutrophils, macrophages, lymphocytes and mast cells) and its upstream immunoreactive substances, and (c) highlight TRPM7 as a potential therapeutic target for autoimmune diseases.
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Affiliation(s)
- Hong-Yu Liang
- The Second School of Clinical Medicine, Anhui Medical University, Hefei, China
| | - Yong Chen
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Xin Wei
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Gang-Gang Ma
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Jie Ding
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Chao Lu
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
| | - Ren-Peng Zhou
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China
| | - Wei Hu
- Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Hefei, China
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8
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Saldías MP, Maureira D, Orellana-Serradell O, Silva I, Lavanderos B, Cruz P, Torres C, Cáceres M, Cerda O. TRP Channels Interactome as a Novel Therapeutic Target in Breast Cancer. Front Oncol 2021; 11:621614. [PMID: 34178620 PMCID: PMC8222984 DOI: 10.3389/fonc.2021.621614] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 03/31/2021] [Indexed: 12/14/2022] Open
Abstract
Breast cancer is one of the most frequent cancer types worldwide and the first cause of cancer-related deaths in women. Although significant therapeutic advances have been achieved with drugs such as tamoxifen and trastuzumab, breast cancer still caused 627,000 deaths in 2018. Since cancer is a multifactorial disease, it has become necessary to develop new molecular therapies that can target several relevant cellular processes at once. Ion channels are versatile regulators of several physiological- and pathophysiological-related mechanisms, including cancer-relevant processes such as tumor progression, apoptosis inhibition, proliferation, migration, invasion, and chemoresistance. Ion channels are the main regulators of cellular functions, conducting ions selectively through a pore-forming structure located in the plasma membrane, protein–protein interactions one of their main regulatory mechanisms. Among the different ion channel families, the Transient Receptor Potential (TRP) family stands out in the context of breast cancer since several members have been proposed as prognostic markers in this pathology. However, only a few approaches exist to block their specific activity during tumoral progress. In this article, we describe several TRP channels that have been involved in breast cancer progress with a particular focus on their binding partners that have also been described as drivers of breast cancer progression. Here, we propose disrupting these interactions as attractive and potential new therapeutic targets for treating this neoplastic disease.
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Affiliation(s)
- María Paz Saldías
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Diego Maureira
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Octavio Orellana-Serradell
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Ian Silva
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Boris Lavanderos
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Pablo Cruz
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Camila Torres
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile
| | - Mónica Cáceres
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile.,The Wound Repair, Treatment, and Health (WoRTH) Initiative, Santiago, Chile
| | - Oscar Cerda
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Universidad de Chile, Santiago, Chile.,Millennium Nucleus of Ion Channels-Associated Diseases (MiNICAD), Santiago, Chile.,The Wound Repair, Treatment, and Health (WoRTH) Initiative, Santiago, Chile
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9
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Meng S, Alanazi R, Ji D, Bandura J, Luo ZW, Fleig A, Feng ZP, Sun HS. Role of TRPM7 kinase in cancer. Cell Calcium 2021; 96:102400. [PMID: 33784560 DOI: 10.1016/j.ceca.2021.102400] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 01/09/2023]
Abstract
Cancer is the second leading cause of death worldwide and accounted for an estimated 9.6 million deaths, or 1 in 6 deaths, in 2018. Despite recent advances in cancer prevention, diagnosis, and treatment strategies, the burden of this disease continues to grow with each year, with dire physical, emotional, and economic consequences for all levels of society. Classic characteristics of cancer include rapid, uncontrolled cell proliferation and spread of cancerous cells to other parts of the body, a process known as metastasis. Transient receptor potential melastatin 7 (TRPM7), a Ca2+- and Mg2+-permeable nonselective divalent cation channel defined by the atypical presence of an α-kinase within its C-terminal domain, has been implicated, due to its modulation of Ca2+ and Mg2+ influx, in a wide variety of physiological and pathological processes, including cancer. TRPM7 is overexpressed in several cancer types and has been shown to variably increase cellular proliferation, migration, and invasion of tumour cells. However, the relative contribution of TRPM7 kinase domain activity to cancer as opposed to ion flux through its channel pore remains an area of active discovery. In this review, we describe the specific role of the TRPM7 kinase domain in cancer processes as well as mechanisms of regulation and inhibition of the kinase domain.
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Affiliation(s)
- Selena Meng
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Rahmah Alanazi
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Delphine Ji
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Julia Bandura
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Zheng-Wei Luo
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada
| | - Andrea Fleig
- Center for Biomedical Research at The Queen's Medical Center and John A. Burns School of Medicine and Cancer Center at the University of Hawaii, Honolulu, HI, 96720, USA
| | - Zhong-Ping Feng
- Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada.
| | - Hong-Shuo Sun
- Department of Surgery, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Physiology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Department of Pharmacology, Temerty Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada; Leslie Dan Faculty of Pharmacy, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada.
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10
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Beesetty P, Rockwood J, Kaitsuka T, Zhelay T, Hourani S, Matsushita M, Kozak JA. Phagocytic activity of splenic macrophages is enhanced and accompanied by cytosolic alkalinization in TRPM7 kinase-dead mice. FEBS J 2021; 288:3585-3601. [PMID: 33354894 DOI: 10.1111/febs.15683] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 10/29/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022]
Abstract
Transient receptor potential melastatin 7 (TRPM7) is a unique protein functioning as a cation channel as well as a serine/threonine kinase and is highly expressed in immune cells such as lymphocytes and macrophages. TRPM7 kinase-dead (KD) mouse model has been used to investigate the role of this protein in immune cells; these animals display moderate splenomegaly and ectopic hemopoiesis. The basal TRPM7 current magnitudes in peritoneal macrophages isolated from KD mice were higher; however, the maximum currents, achieved after cytoplasmic Mg2+ washout, were not different. In the present study, we investigated the consequences of TRPM7 kinase inactivation in splenic and peritoneal macrophages. We measured the basal phagocytic activity of splenic macrophages using fluorescent latex beads, pHrodo zymosan bioparticles, and opsonized red blood cells. KD macrophages phagocytized more efficiently and had slightly higher baseline calcium levels compared to WT cells. We found no obvious differences in store-operated Ca2+ entry between WT and KD macrophages. By contrast, the resting cytosolic pH in KD macrophages was significantly more alkaline than in WT. Pharmacological blockade of sodium hydrogen exchanger 1 (NHE1) reversed the cytosolic alkalinization and reduced phagocytosis in KD macrophages. Basal TRPM7 channel activity in KD macrophages was also reduced after NHE1 blockade. Cytosolic Mg2+ sensitivity of TRPM7 channels measured in peritoneal macrophages was similar in WT and KD mice. The higher basal TRPM7 channel activity in KD macrophages is likely due to alkalinization. Our results identify a novel role for TRPM7 kinase as a suppressor of basal phagocytosis and a regulator of cellular pH.
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Affiliation(s)
- Pavani Beesetty
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Jananie Rockwood
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Taku Kaitsuka
- Department of Molecular Physiology, Faculty of Life Sciences, Kumamoto University, Japan
| | - Tetyana Zhelay
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Siham Hourani
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
| | - Masayuki Matsushita
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
| | - J Ashot Kozak
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH, USA
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11
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Hu F, Li M, Han F, Zhang Q, Zeng Y, Zhang W, Cheng X. Role of TRPM7 in cardiac fibrosis: A potential therapeutic target (Review). Exp Ther Med 2020; 21:173. [PMID: 33456540 PMCID: PMC7792474 DOI: 10.3892/etm.2020.9604] [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: 04/04/2020] [Accepted: 12/04/2020] [Indexed: 02/06/2023] Open
Abstract
Cardiac fibrosis is a hallmark of cardiac remodeling associated with nearly all forms of heart disease. Clinically, no effective therapeutic drugs aim to inhibit cardiac fibrosis, owing to the complex etiological heterogeneity and pathogenesis of this disease. A two-in-one protein structure, a ubiquitous expression profile and unique biophysical characteristics enable the involvement of transient receptor potential melastatin-subfamily member 7 (TRPM7) in the pathogenesis and development of fibrosis-related cardiac diseases, such as heart failure (HF), cardiomyopathies, arrhythmia and hyperaldosteronism. In response to a variety of stimuli, multiple bioactive molecules can activate TRPM7 and related signaling pathways, leading to fibroblast proliferation, differentiation and extracellular matrix production in cardiac fibroblasts. TRPM7-mediated Ca2+ signaling and TGF-β1 signaling pathways are critical for the formation of fibrosis. Accumulating evidence has demonstrated that TRPM7 is a potential pharmacological target for halting the development of fibrotic cardiac diseases. Reliable drug-like molecules for further development of high-affinity in vivo drugs targeting TRPM7 are urgently needed. The present review discusses the widespread and significant role of TRPM7 in cardiac fibrosis and focuses on its potential as a therapeutic target for alleviating heart fibrogenesis.
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Affiliation(s)
- Feng Hu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Meiyong Li
- Department of Laboratory Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Fengyu Han
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Qing Zhang
- Department of Cardiology, The Union Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Yuhao Zeng
- Department of Medical Education, The Second Clinical Medical College of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Weifang Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
| | - Xiaoshu Cheng
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China.,Center for Prevention and Treatment of Cardiovascular Diseases, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
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12
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Wojciechowska M, Miszkiewicz J, Trylska J. Conformational Changes of Anoplin, W-MreB 1-9, and (KFF) 3K Peptides near the Membranes. Int J Mol Sci 2020; 21:E9672. [PMID: 33352981 PMCID: PMC7766051 DOI: 10.3390/ijms21249672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 12/07/2020] [Accepted: 12/14/2020] [Indexed: 12/12/2022] Open
Abstract
Many peptides interact with biological membranes, but elucidating these interactions is challenging because cellular membranes are complex and peptides are structurally flexible. To contribute to understanding how the membrane-active peptides behave near the membranes, we investigated peptide structural changes in different lipid surroundings. We focused on two antimicrobial peptides, anoplin and W-MreB1-9, and one cell-penetrating peptide, (KFF)3K. Firstly, by using circular dichroism spectroscopy, we determined the secondary structures of these peptides when interacting with micelles, liposomes, E. coli lipopolysaccharides, and live E. coli bacteria. The peptides were disordered in the buffer, but anoplin and W-MreB1-9 displayed lipid-induced helicity. Yet, structural changes of the peptide depended on the composition and concentration of the membranes. Secondly, we quantified the destructive activity of peptides against liposomes by monitoring the release of a fluorescent dye (calcein) from the liposomes treated with peptides. We observed that only for anoplin and W-MreB1-9 calcein leakage from liposomes depended on the peptide concentration. Thirdly, bacterial growth inhibition assays showed that peptide conformational changes, evoked by the lipid environments, do not directly correlate with the antimicrobial activity of the peptides. However, understanding the relation between peptide structural properties, mechanisms of membrane disruption, and their biological activities can guide the design of membrane-active peptides.
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Affiliation(s)
- Monika Wojciechowska
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland;
| | - Joanna Miszkiewicz
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland;
- College of Inter-Faculty Individual Studies in Mathematics and Natural Sciences, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland
| | - Joanna Trylska
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warsaw, Poland;
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13
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Firinu D, Arba M, Vincenzoni F, Iavarone F, Costanzo G, Cabras T, Castagnola M, Messana I, Del Giacco SR, Sanna MT. Proteomic Analysis of the Acid-Insoluble Fraction of Whole Saliva from Patients Affected by Different Forms of Non-histaminergic Angioedema. J Clin Immunol 2020; 40:840-850. [PMID: 32519288 DOI: 10.1007/s10875-020-00802-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 06/01/2020] [Indexed: 01/17/2023]
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14
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Stelling MP, Motta JM, Mashid M, Johnson WE, Pavão MS, Farrell NP. Metal ions and the extracellular matrix in tumor migration. FEBS J 2020; 286:2950-2964. [PMID: 31379111 DOI: 10.1111/febs.14986] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 05/22/2019] [Accepted: 07/06/2019] [Indexed: 12/15/2022]
Abstract
In this review, we explore the roles of divalent metal ions in structure and function within the extracellular matrix (ECM), specifically, their interaction with glycosaminoglycans (GAGs) during tumor progression. Metals and GAGs have been individually associated with physiological and pathological processes, however, their combined activities in regulating cell behavior and ECM remodeling have not been fully explored to date. During tumor progression, divalent metals and GAGs participate in central processes, such as cell migration and angiogenesis, either by modulating cell surface molecules, as well as soluble signaling factors. In addition, studies on metals and polysaccharides interactions have been of great value, as they provide structural information that can be correlated with function. Finally, we believe that understanding how metals are regulated in physiological and pathological conditions is paramount for the development of new treatment strategies, as well as diagnostic and exploratory tools.
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Affiliation(s)
- Mariana P Stelling
- Instituto Federal de Educacao, Educação, Ciência e Tecnologia do Rio de Janeiro, Brazil
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15
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Rios FJ, Zou ZG, Harvey AP, Harvey KY, Nosalski R, Anyfanti P, Camargo LL, Lacchini S, Ryazanov AG, Ryazanova L, McGrath S, Guzik TJ, Goodyear CS, Montezano AC, Touyz RM. Chanzyme TRPM7 protects against cardiovascular inflammation and fibrosis. Cardiovasc Res 2020; 116:721-735. [PMID: 31250885 PMCID: PMC7252442 DOI: 10.1093/cvr/cvz164] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 05/07/2019] [Accepted: 06/26/2019] [Indexed: 12/12/2022] Open
Abstract
AIMS Transient Receptor Potential Melastatin 7 (TRPM7) cation channel is a chanzyme (channel + kinase) that influences cellular Mg2+ homeostasis and vascular signalling. However, the pathophysiological significance of TRPM7 in the cardiovascular system is unclear. The aim of this study was to investigate the role of this chanzyme in the cardiovascular system focusing on inflammation and fibrosis. METHODS AND RESULTS TRPM7-deficient mice with deletion of the kinase domain (TRPM7+/Δkinase) were studied and molecular mechanisms investigated in TRPM7+/Δkinase bone marrow-derived macrophages (BMDM) and co-culture systems with cardiac fibroblasts. TRPM7-deficient mice had significant cardiac hypertrophy, fibrosis, and inflammation. Cardiac collagen and fibronectin content, expression of pro-inflammatory mediators (SMAD3, TGFβ) and cytokines [interleukin (IL)-6, IL-10, IL-12, tumour necrosis factor-α] and phosphorylation of the pro-inflammatory signalling molecule Stat1, were increased in TRPM7+/Δkinase mice. These processes were associated with infiltration of inflammatory cells (F4/80+CD206+ cardiac macrophages) and increased galectin-3 expression. Cardiac [Mg2+]i, but not [Ca2+]i, was reduced in TRPM7+/Δkinase mice. Calpain, a downstream TRPM7 target, was upregulated (increased expression and activation) in TRPM7+/Δkinase hearts. Vascular functional and inflammatory responses, assessed in vivo by intra-vital microscopy, demonstrated impaired neutrophil rolling, increased neutrophil: endothelial attachment and transmigration of leucocytes in TRPM7+/Δkinase mice. TRPM7+/Δkinase BMDMs had increased levels of galectin-3, IL-10, and IL-6. In co-culture systems, TRPM7+/Δkinase macrophages increased expression of fibronectin, proliferating cell nuclear antigen, and TGFβ in cardiac fibroblasts from wild-type mice, effects ameliorated by MgCl2 treatment. CONCLUSIONS We identify a novel anti-inflammatory and anti-fibrotic role for TRPM7 and suggest that its protective effects are mediated, in part, through Mg2+-sensitive processes.
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Affiliation(s)
- Francisco J Rios
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Zhi-Guo Zou
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Adam P Harvey
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Katie Y Harvey
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Ryszard Nosalski
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Panagiota Anyfanti
- 3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Livia L Camargo
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Silvia Lacchini
- Department of Anatomy, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Alexey G Ryazanov
- Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ, USA
| | - Lillia Ryazanova
- Lewis Sigler Institute of Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Sarah McGrath
- Centre of Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Tomasz J Guzik
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Carl S Goodyear
- Centre of Immunobiology, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Augusto C Montezano
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
| | - Rhian M Touyz
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA, UK
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16
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Wan J, Guo AA, Chowdhury I, Guo S, Hibbert J, Wang G, Liu M. TRPM7 Induces Mechanistic Target of Rap1b Through the Downregulation of miR-28-5p in Glioma Proliferation and Invasion. Front Oncol 2019; 9:1413. [PMID: 31921670 PMCID: PMC6928690 DOI: 10.3389/fonc.2019.01413] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/28/2019] [Indexed: 01/29/2023] Open
Abstract
Objectives: Our previous findings demonstrate that channel-kinase transient receptor potential (TRP) ion channel subfamily M, member 7 (TRPM7) is critical in regulating human glioma cell migration and invasion. Since microRNAs (miRNAs) participate in complex regulatory networks that may affect almost every cellular and molecular process during glioma formation and progression, we explored the role of miRNAs in human glioma progression by comparing miRNA expression profiles due to differentially expressed TRPM7. Methods: First, we performed miRNA microarray analysis to determine TRPM7's miRNA targets upon TRPM7 silencing in A172 cells and validated the miRNA microarray data using A172, U87MG, U373MG, and SNB19 cell lines by stem-loop RT-qPCRs. We next determined whether TRPM7 regulates glioma cell proliferation and migration/invasion through different functional domains by overexpressing wild-type human TRPM7 (wtTRPM7), two mutants with TRPM7's α-kinase domain deleted (Δkinase-DK), or a point mutation in the ATP binding site of the α-kinase domain (K1648R-KR). In addition, we determined the roles of miR-28-5p in glioma cell proliferation and invasion by overexpressing or under expressing miR-28-5p in vitro. Lastly, we determined whether a Ras-related small GTP-binding protein (Rap1b) is a target of miR-28-5p in glioma tumorigenesis. Results: The miRNA microarray data revealed a list of 16 downregulated and 10 upregulated miRNAs whose transcripts are significantly changed by TRPM7 knock-down. Cell invasion was significantly reduced in two TRPM7 mutants with inactive kinase domain, Δkinase, and K1648R transfected glioma cells. miR-28-5p overexpression suppressed glioma cells' proliferation and invasion, and miR-28-5p under expression led to a significant increase in glioma cell proliferation and migration/invasion compared to that of the controls. miR-28-5p suppressed glioma cell proliferation and migration by targeting Rap1b. Co-transfection of siRap1b with miR28-5p inhibitor reduced the glioma cell proliferation and invasion, caused by the latter. Conclusions: These results indicate that TRPM7's channel activity is required for glioma cell growth while the kinase domain is required for cell migration/invasion. TRPM7 regulates miR-28-5p expression, which suppresses cell proliferation and invasion in glioma cells by targeting Rap1b signaling.
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Affiliation(s)
- Jingwei Wan
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, United States,Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Alyssa Aihui Guo
- Department of Obstetrics and Gynecology, Morehouse School of Medicine, Atlanta, GA, United States,University of South Carolina SOM Greenville, Greenville, SC, United States
| | - Indrajit Chowdhury
- Department of Obstetrics and Gynecology, Morehouse School of Medicine, Atlanta, GA, United States
| | - Shanchun Guo
- Department of Chemistry, Xavier University, New Orleans, LA, United States
| | - Jacqueline Hibbert
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, United States
| | - Guangdi Wang
- Department of Chemistry, Xavier University, New Orleans, LA, United States
| | - Mingli Liu
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, United States,*Correspondence: Mingli Liu
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17
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Inhibition of TRPM7 blocks MRTF/SRF-dependent transcriptional and tumorigenic activity. Oncogene 2019; 39:2328-2344. [PMID: 31844251 DOI: 10.1038/s41388-019-1140-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 11/24/2019] [Accepted: 11/29/2019] [Indexed: 12/13/2022]
Abstract
Myocardin-related transcription factors A and B (MRTFs) are coactivators of Serum Response Factor (SRF) that mediates the expression of genes involved in cell proliferation, migration and differentiation. There is mounting evidence that MRTFs and SRF represent promising targets for hepatocellular carcinoma (HCC) growth. Since MRTF-A nuclear localization is a prerequisite for its transcriptional activity and oncogenic properties, we searched for pharmacologically active compounds able to redistribute MRTF-A to the cytoplasm. We identified NS8593, a negative gating modulator of the transient receptor potential cation channel TRPM7, as a novel inhibitor of MRTF-A nuclear localization and transcriptional activity. Using a pharmacological approach and targeted genome editing, we investigated the functional contribution of TRPM7, a unique ion channel containing a serine-threonine kinase domain, to MRTF transcriptional and tumorigenic activity. We found that TRPM7 function regulates RhoA activity and subsequently actin polymerization, MRTF-A-Filamin A complex formation and MRTF-A/SRF target gene expression. Mechanistically, TRPM7 signaling relies on TRPM7 channel-mediated Mg2+ influx and phosphorylation of RhoA by TRPM7 kinase. Pharmacological blockade of TRPM7 results in oncogene-induced senescence of hepatocellular carcinoma (HCC) cells in vitro and in vivo in HCC xenografts. Hence, inhibition of the TRPM7/MRTF axis emerges as a promising strategy to curb HCC growth.
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18
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Nadolni W, Zierler S. The Channel-Kinase TRPM7 as Novel Regulator of Immune System Homeostasis. Cells 2018; 7:cells7080109. [PMID: 30126133 PMCID: PMC6115979 DOI: 10.3390/cells7080109] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/13/2018] [Accepted: 08/13/2018] [Indexed: 12/16/2022] Open
Abstract
The enzyme-coupled transient receptor potential channel subfamily M member 7, TRPM7, has been associated with immunity and immune cell signalling. Here, we review the role of this remarkable signalling protein in lymphocyte proliferation, differentiation, activation and survival. We also discuss its role in mast cell, neutrophil and macrophage function and highlight the potential of TRPM7 to regulate immune system homeostasis. Further, we shed light on how the cellular signalling cascades involving TRPM7 channel and/or kinase activity culminate in pathologies as diverse as allergic hypersensitivity, arterial thrombosis and graft versus host disease (GVHD), stressing the need for TRPM7 specific pharmacological modulators.
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Affiliation(s)
- Wiebke Nadolni
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Goethestr. 33, 80336 Munich, Germany.
| | - Susanna Zierler
- Walther Straub Institute of Pharmacology and Toxicology, Faculty of Medicine, LMU Munich, Goethestr. 33, 80336 Munich, Germany.
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19
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Ranchoux B, Harvey LD, Ayon RJ, Babicheva A, Bonnet S, Chan SY, Yuan JXJ, Perez VDJ. Endothelial dysfunction in pulmonary arterial hypertension: an evolving landscape (2017 Grover Conference Series). Pulm Circ 2018; 8:2045893217752912. [PMID: 29283043 PMCID: PMC5798691 DOI: 10.1177/2045893217752912] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/18/2017] [Indexed: 02/06/2023] Open
Abstract
Endothelial dysfunction is a major player in the development and progression of vascular pathology in pulmonary arterial hypertension (PAH), a disease associated with small vessel loss and obstructive vasculopathy that leads to increased pulmonary vascular resistance, subsequent right heart failure, and premature death. Over the past ten years, there has been tremendous progress in our understanding of pulmonary endothelial biology as it pertains to the genetic and molecular mechanisms that orchestrate the endothelial response to direct or indirect injury, and how their dysregulation can contribute to the pathogenesis of PAH. As one of the major topics included in the 2017 Grover Conference Series, discussion centered on recent developments in four areas of pulmonary endothelial biology: (1) angiogenesis; (2) endothelial-mesenchymal transition (EndMT); (3) epigenetics; and (4) biology of voltage-gated ion channels. The present review will summarize the content of these discussions and provide a perspective on the most promising aspects of endothelial dysfunction that may be amenable for therapeutic development.
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Affiliation(s)
| | - Lloyd D. Harvey
- University of Pittsburgh Vascular Medicine Institute Division of Cardiology, Pittsburgh, PA, USA
| | - Ramon J. Ayon
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, AZ, USA
| | - Aleksandra Babicheva
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, AZ, USA
| | | | - Stephen Y. Chan
- University of Pittsburgh Vascular Medicine Institute Division of Cardiology, Pittsburgh, PA, USA
| | - Jason X.-J. Yuan
- Division of Translational and Regenerative Medicine, The University of Arizona College of Medicine, Tucson, AZ, USA
| | - Vinicio de Jesus Perez
- Division of Pulmonary and Critical Care Medicine, Stanford University Medical Center, Stanford, CA, USA
- The Vera Moulton Wall Center for Pulmonary Vascular Medicine, Stanford University Medical Center, Stanford, CA, USA
- Stanford Cardiovascular Institute, Stanford University Medical Center, Stanford, CA, USA
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20
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Romagnani A, Vettore V, Rezzonico-Jost T, Hampe S, Rottoli E, Nadolni W, Perotti M, Meier MA, Hermanns C, Geiger S, Wennemuth G, Recordati C, Matsushita M, Muehlich S, Proietti M, Chubanov V, Gudermann T, Grassi F, Zierler S. TRPM7 kinase activity is essential for T cell colonization and alloreactivity in the gut. Nat Commun 2017; 8:1917. [PMID: 29203869 PMCID: PMC5714948 DOI: 10.1038/s41467-017-01960-z] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 10/29/2017] [Indexed: 02/08/2023] Open
Abstract
The melastatin-like transient-receptor-potential-7 protein (TRPM7), harbouring a cation channel and a serine/threonine kinase, has been implicated in thymopoiesis and cytokine expression. Here we show, by analysing TRPM7 kinase-dead mutant (Trpm7 R/R ) mice, that the enzymatic activity of the receptor is not essential for thymopoiesis, but is required for CD103 transcription and gut-homing of intra-epithelial lymphocytes. Defective T cell gut colonization reduces MHCII expression in intestinal epithelial cells. Mechanistically, TRPM7 kinase activity controls TGF-β-induced CD103 expression and pro-inflammatory T helper 17, but not regulatory T, cell differentiation by modulating SMAD2. Notably, we find that the TRPM7 kinase activity promotes gut colonization by alloreactive T cells in acute graft-versus-host disease. Thus, our results unravel a function of TRPM7 kinase in T cell activity and suggest a therapeutic potential of kinase inhibitors in averting acute graft-versus-host disease.
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Affiliation(s)
- Andrea Romagnani
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, c/o Theodor Kocher Institute, Freiestrasse 1, P.O. Box 938, CH-3000, Bern 9, Switzerland
| | - Valentina Vettore
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Tanja Rezzonico-Jost
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland
| | - Sarah Hampe
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Elsa Rottoli
- Department of Medical Biotechnology and Translational Medicine (BIOMETRA), Università degli Studi di Milano, Via G.B. Viotti 3/5, 20133, Milan, Italy
| | - Wiebke Nadolni
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Michela Perotti
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland
| | - Melanie A Meier
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Constanze Hermanns
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Sheila Geiger
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Gunther Wennemuth
- Institute for Anatomy, Universitätsklinikum Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | | | - Masayuki Matsushita
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Okinawa, 903-0215, Japan
| | - Susanne Muehlich
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Michele Proietti
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland.,Center for Chronic Immunodeficiency, Universitätsklinikum Freiburg, Breisacher Street 115, 79106, Freiburg, Germany
| | - Vladimir Chubanov
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Thomas Gudermann
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany
| | - Fabio Grassi
- Institute for Research in Biomedicine, Università della Svizzera Italiana, Via Vincenzo Vela 6, CH-6500, Bellinzona, Switzerland. .,Department of Medical Biotechnology and Translational Medicine (BIOMETRA), Università degli Studi di Milano, Via G.B. Viotti 3/5, 20133, Milan, Italy. .,Istituto Nazionale Genetica Molecolare "Romeo ed Enrica Invernizzi", Via Francesco Sforza, 35-20122, Milan, Italy.
| | - Susanna Zierler
- Walther Straub Institute of Pharmacology and Toxicology, Ludwig-Maximilians Universität München, Goethestrasse 33, 80336, Munich, Germany.
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21
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Antunes TT, Callera GE, He Y, Yogi A, Ryazanov AG, Ryazanova LV, Zhai A, Stewart DJ, Shrier A, Touyz RM. Transient Receptor Potential Melastatin 7 Cation Channel Kinase: New Player in Angiotensin II-Induced Hypertension. Hypertension 2016; 67:763-73. [PMID: 26928801 DOI: 10.1161/hypertensionaha.115.07021] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 01/13/2016] [Indexed: 12/30/2022]
Abstract
Transient receptor potential melastatin 7 (TRPM7) is a bifunctional protein comprising a magnesium (Mg(2+))/cation channel and a kinase domain. We previously demonstrated that vasoactive agents regulate vascular TRPM7. Whether TRPM7 plays a role in the pathophysiology of hypertension and associated cardiovascular dysfunction is unknown. We studied TRPM7 kinase-deficient mice (TRPM7Δkinase; heterozygous for TRPM7 kinase) and wild-type (WT) mice infused with angiotensin II (Ang II; 400 ng/kg per minute, 4 weeks). TRPM7 kinase expression was lower in heart and aorta from TRPM7Δkinase versus WT mice, effects that were further reduced by Ang II infusion. Plasma Mg(2+) was lower in TRPM7Δkinase versus WT mice in basal and stimulated conditions. Ang II increased blood pressure in both strains with exaggerated responses in TRPM7Δkinase versus WT groups (P<0.05). Acetylcholine-induced vasorelaxation was reduced in Ang II-infused TRPM7Δkinase mice, an effect associated with Akt and endothelial nitric oxide synthase downregulation. Vascular cell adhesion molecule-1 expression was increased in Ang II-infused TRPM7 kinase-deficient mice. TRPM7 kinase targets, calpain, and annexin-1, were activated by Ang II in WT but not in TRPM7Δkinase mice. Echocardiographic and histopathologic analysis demonstrated cardiac hypertrophy and left ventricular dysfunction in Ang II-treated groups. In TRPM7 kinase-deficient mice, Ang II-induced cardiac functional and structural effects were amplified compared with WT counterparts. Our data demonstrate that in TRPM7Δkinase mice, Ang II-induced hypertension is exaggerated, cardiac remodeling and left ventricular dysfunction are amplified, and endothelial function is impaired. These processes are associated with hypomagnesemia, blunted TRPM7 kinase expression/signaling, endothelial nitric oxide synthase downregulation, and proinflammatory vascular responses. Our findings identify TRPM7 kinase as a novel player in Ang II-induced hypertension and associated vascular and target organ damage.
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Affiliation(s)
- Tayze T Antunes
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Glaucia E Callera
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Ying He
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Alvaro Yogi
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Alexey G Ryazanov
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Lillia V Ryazanova
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Alexander Zhai
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Duncan J Stewart
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Alvin Shrier
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.)
| | - Rhian M Touyz
- From the Kidney Research Centre (T.T.A., G.E.C., Y.H., A.Y., R.M.T.) and Sprott Centre for Stem Cell Research and Regenerative Medicine Program (A.Z., D.J.S.), Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada; Department of Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ (A.G.R., L.V.R.); Department of Physiology and Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montreal, QC, Canada (A.S.); and BHF Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom (R.M.T.).
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22
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Schäfer S, Ferioli S, Hofmann T, Zierler S, Gudermann T, Chubanov V. Mibefradil represents a new class of benzimidazole TRPM7 channel agonists. Pflugers Arch 2015; 468:623-34. [PMID: 26669310 DOI: 10.1007/s00424-015-1772-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 12/02/2015] [Accepted: 12/04/2015] [Indexed: 01/16/2023]
Abstract
Transient receptor potential cation channel, subfamily M, member 7 (TRPM7) is a bi-functional protein comprising an ion channel moiety covalently linked to a protein kinase domain. Currently, the prevailing view is that a decrease in the cytosolic Mg(2+) concentration leads to activation of divalent cation-selective TRPM7 currents. TRPM7 plays a role in immune responses, hypotension, tissue fibrosis, and tumor progression and, therefore, represents a new promising therapeutic target. Because of the dearth of pharmacological tools, our mechanistic understanding of the role of TRPM7 in physiology and pathophysiology still lags behind. Therefore, we have recently carried out a high throughput screen for small-molecule activators of TRPM7. We have characterized the phenanthrene naltriben as a first stimulatory agonist of the TRPM7 channel. Surprisingly, the effect of naltriben on TRPM7 was found to be unaffected by the physiological levels of cytosolic Mg(2+). Here, we demonstrate that mibefradil and NNC 50-0396, two benzimidazole relatives of the TRPM7 inhibitor NS8593, are positive modulators of TRPM7. Using Ca(2+) imaging and the patch-clamp technique, we show that mibefradil activates TRPM7-mediated Ca(2+) entry and whole-cell currents. The response to mibefradil was fast, reversible, and reproducible. In contrast to naltriben, mibefradil efficiently activates TRPM7 currents only at physiological intracellular Mg(2+) concentrations, and its stimulatory effect was fully abrogated by high internal Mg(2+) levels. Consequently, a TRPM7 variant harboring a gain-of-function mutation was insensitive to further mibefradil activation. Finally, we observed that the effect of mibefradil was selective for TRPM7 when various TRP channels were tested. Taken together, mibefradil acts as a Mg(2+)-regulated agonist of the TRPM7 channel and, hence, uncovers a new class of TRPM7 agonists.
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Affiliation(s)
- Sebastian Schäfer
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Silvia Ferioli
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Thomas Hofmann
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Susanna Zierler
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
| | - Thomas Gudermann
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany
- Comprehensive Pneumology Center Munich (CPC-M), German Center for Lung Research, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), Munich Heart Alliance, Munich, Germany
| | - Vladimir Chubanov
- Walther-Straub-Institute of Pharmacology and Toxicology, University of Munich, Goethestrasse 33, 80336, Munich, Germany.
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23
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Abstract
Calcium (Ca2+) and magnesium (Mg2+) ions have been shown to play an important role in regulating various neuronal functions. In the present review we focus on the emerging role of transient potential melastatin-7 (TRPM7) channel in not only regulating Ca2+ and Mg2+ homeostasis necessary for biological functions, but also how alterations in TRPM7 function/expression could induce neurodegeneration. Although eight TRPM channels have been identified, the channel properties, mode of activation, and physiological responses of various TRPM channels are quite distinct. Among the known 8 TRPM channels only TRPM6 and TRPM7 channels are highly permeable to both Ca2+ and Mg2+; however here we will only focus on TRPM7 as unlike TRPM6, TRPM7 channels are abundantly expressed in neuronal cells. Importantly, the discrepancy in TRPM7 channel function and expression leads to various neuronal diseases such as Alzheimer disease (AD) and Parkinson disease (PD). Further, it is emerging as a key factor in anoxic neuronal death and in other neurodegenerative disorders. Thus, by understanding the precise involvement of the TRPM7 channels in different neurodegenerative diseases and by understanding the factors that regulate TRPM7 channels, we could uncover new strategies in the future that could evolve as new drug therapeutic targets for effective treatment of these neurodegenerative diseases.
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Affiliation(s)
- Yuyang Sun
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
| | - Pramod Sukumaran
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
| | - Anne Schaar
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
| | - Brij B Singh
- a Department of Basic Science ; School of Medicine and Health Sciences, University of North Dakota ; Grand Forks , ND USA
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24
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Visser D, Middelbeek J, van Leeuwen FN, Jalink K. Function and regulation of the channel-kinase TRPM7 in health and disease. Eur J Cell Biol 2014; 93:455-65. [DOI: 10.1016/j.ejcb.2014.07.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 06/24/2014] [Accepted: 07/01/2014] [Indexed: 11/30/2022] Open
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25
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Donohue MP, Bartolotti LJ, Li Y. The N-terminal of annexin A1 as a secondary membrane binding site: A molecular dynamics study. Proteins 2014; 82:2936-42. [DOI: 10.1002/prot.24623] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 05/19/2014] [Accepted: 05/28/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Matthew P. Donohue
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858
| | - Libero J. Bartolotti
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858
| | - Yumin Li
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858
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26
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Zhou W, Guo S, Xiong Z, Liu M. Oncogenic role and therapeutic target of transient receptor potential melastatin 7 channel in malignancy. Expert Opin Ther Targets 2014; 18:1177-96. [DOI: 10.1517/14728222.2014.940894] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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27
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Inactivation of TRPM7 kinase activity does not impair its channel function in mice. Sci Rep 2014; 4:5718. [PMID: 25030553 PMCID: PMC4101474 DOI: 10.1038/srep05718] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 06/23/2014] [Indexed: 11/30/2022] Open
Abstract
Transient receptor potential (TRP) family channels are involved in sensory pathways and respond to various environmental stimuli. Among the members of this family, TRPM7 is a unique fusion of an ion channel and a C-terminus kinase domain that is highly expressed in immune cells. TRPM7 serves as a key molecule governing cellular Mg2+ homeostasis in mammals since its channel pore is permeable to Mg2+ ions and can act as a Mg2+ influx pathway. However, mechanistic links between its kinase activity and channel function have remained uncertain. In this study, we generated kinase inactive knock-in mutant mice by mutagenesis of a key lysine residue involved in Mg2+-ATP binding. These mutant mice were normal in development and general locomotor activity. In peritoneal macrophages isolated from adult animals the basal activity of TRPM7 channels prior to cytoplasmic Mg2+ depletion was significantly potentiated, while maximal current densities measured after Mg2+ depletion were unchanged in the absence of detectable kinase function. Serum total Ca2+ and Mg2+ levels were not significantly altered in kinase-inactive mutant mice. Our findings suggest that abolishing TRPM7 kinase activity does not impair its channel activity and kinase activity is not essential for regulation of mammalian Mg2+ homeostasis.
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28
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Hofmann T, Schäfer S, Linseisen M, Sytik L, Gudermann T, Chubanov V. Activation of TRPM7 channels by small molecules under physiological conditions. Pflugers Arch 2014; 466:2177-89. [PMID: 24633576 DOI: 10.1007/s00424-014-1488-0] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 02/17/2014] [Accepted: 02/18/2014] [Indexed: 01/07/2023]
Abstract
Transient receptor potential cation channel, subfamily M, member 7 (TRPM7) is a cation channel covalently linked to a protein kinase domain. TRPM7 is ubiquitously expressed and regulates key cellular processes such as Mg(2+) homeostasis, motility, and proliferation. TRPM7 is involved in anoxic neuronal death, cardiac fibrosis, and tumor growth. The goal of this work was to identify small molecule activators of the TRPM7 channel and investigate their mechanism of action. We used an aequorin bioluminescence-based assay to screen for activators of the TRPM7 channel. Valid candidates were further characterized using patch clamp electrophysiology. We identified 20 drug-like compounds with various structural backbones that can activate the TRPM7 channel. Among them, the δ opioid antagonist naltriben was studied in greater detail. Naltriben's action was selective among the TRP channels tested. Naltriben activates TRPM7 currents without prior depletion of intracellular Mg(2+) even under conditions of low PIP2. Moreover, naltriben interfered with the effect of the TRPM7 inhibitor NS8593. Finally, our experiments with TRPM7 variants carrying mutations in the pore, TRP, and kinase domains indicate that the site of TRPM7 activation by this small-molecule ligand is most likely located in or near the TRP domain. In conclusion, we identified the first organic small-molecule activators of TRPM7 channels, thus providing new experimental tools to study TRPM7 function in native cellular environments.
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Affiliation(s)
- T Hofmann
- Philipps-Universität Marburg, Klinik für Innere Medizin/Nephrologie, Baldingerstraße 1, 35043, Marburg, Germany,
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29
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Kotlo K, Xing Y, Lather S, Grillon JM, Johnson K, Skidgel RA, Solaro RJ, Danziger RS. PR65A phosphorylation regulates PP2A complex signaling. PLoS One 2014; 9:e85000. [PMID: 24465463 PMCID: PMC3897379 DOI: 10.1371/journal.pone.0085000] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 11/27/2013] [Indexed: 01/12/2023] Open
Abstract
Serine-threonine Protein phosphatase 2 A (PP2A), a member of the PPP family of phosphatases, regulates a variety of essential cellular processes, including cell-cycling, DNA replication, transcription, translation, and secondary signaling pathways. In the heart, increased PP2A activity/signaling has been linked to cardiac remodeling, contractile dysfunction and, in failure, arrythmogenicity. The core PP2A complex is a hetero-trimeric holoenzyme consisting of a 36 kDa catalytic subunit (PP2Ac); a regulatory scaffold subunit of 65 kDa (PR65A or PP2Aa); and one of at least 18 associated variable regulatory proteins (B subunits) classified into 3 families. In the present study, three in vivo sites of phosphorylation in cardiac PR65A are identified (S303, T268, S314). Using HEK cells transfected with recombinant forms of PR65A with phosphomimetic (P-PR65A) and non-phosphorylated (N-PR65A) amino acid substitutions at these sites, these phosphorylations were shown to inhibit the interaction of PR65A with PP2Ac and PP2A holoenzyme signaling. Forty-seven phospho-proteins were increased in abundance in HEK cells transfected with P-PR65A versus N-PR65A by phospho-protein profiling using 2D-DIGE analysis on phospho-enriched whole cell protein extracts. Among these proteins were elongation factor 1α (EF1A), elongation factor 2, heat shock protein 60 (HSP60), NADPH-dehydrogenase 1 alpha sub complex, annexin A, and PR65A. Compared to controls, failing hearts from the Dahl rat had less phosphorylated PR65A protein abundance and increased PP2A activity. Thus, PR65A phosphorylation is an in vivo mechanism for regulation of the PP2A signaling complex and increased PP2A activity in heart failure.
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Affiliation(s)
- Kumar Kotlo
- Department of Medicine and Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Yongna Xing
- Department of Oncology, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Sonia Lather
- Jesse Brown Veterans Administration, Chicago, Illinois, United States of America
| | - Jean Michel Grillon
- Department of Medicine and Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Keven Johnson
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Randal A. Skidgel
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - R. John Solaro
- Department of Medicine and Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Physiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Robert S. Danziger
- Department of Medicine and Center for Cardiovascular Research, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Department of Physiology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Jesse Brown Veterans Administration, Chicago, Illinois, United States of America
- Department of Pharmacology, University of Illinois at Chicago, Chicago, Illinois, United States of America
- * E-mail:
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30
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Abstract
TRPM6 is a bifunctional protein comprising a TRP cation channel segment covalently linked to an α-type serine/threonine protein kinase. TRPM6 is expressed in the intestinal and renal epithelial cells. Loss-of-function mutations in the human TRPM6 gene give rise to hypomagnesemia with secondary hypocalcemia (HSH), suggesting that the TRPM6 channel kinase plays a central role in systemic Mg(2+) homeostasis. In contrast, Trpm6 null mice show a delay in prenatal development, neural tube defects, and prenatal death. Possible functions of TRPM6 in prenatal and adult organisms will be discussed in this chapter.
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Affiliation(s)
- Vladimir Chubanov
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians University Munich, Goethestrasse 33, Munich, 80336, Germany,
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31
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Abstract
The channel kinases TRPM6 and TRPM7 are fusion proteins with an ion transport domain and an enzymatically active kinase domain. TRPM7 has been found in every mammalian tissue investigated to date. The two-in-one protein structure, the ubiquitous expression profile, and the protein's unique biophysical characteristics that enable divalent ion transport involve TRPM7 in a plethora of (patho)physiological processes. With its prominent role in cellular and systemic magnesium homeostasis, TRPM7 emerges as a key player in embryonic development, global ischemia, cardiovascular disease, and cancer.
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Affiliation(s)
- Andrea Fleig
- Center for Biomedical Research at The Queen's Medical Center, Honolulu, HI, USA,
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32
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D'Acunto CW, Gbelcova H, Festa M, Ruml T. The complex understanding of Annexin A1 phosphorylation. Cell Signal 2013; 26:173-8. [PMID: 24103589 DOI: 10.1016/j.cellsig.2013.09.020] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 09/18/2013] [Accepted: 09/30/2013] [Indexed: 12/20/2022]
Abstract
Annexin A1 (ANXA1) is the first characterized member of the annexins superfamily. It binds the cellular membrane phospholipids in Ca(2+) regulated manner. Annexin A1 has been found in several tissues and many physiological roles as hormones secretion, vesiculation, inflammatory response, apoptosis and differentiation have been shown. Its subcellular localization and binding with many partner proteins are altered accordingly with its physiological role. The Annexin A1 membrane localization is crucial for binding to receptors, suggesting a paracrine and juxtacrine extracellular action. Annexin A1 is subjected to several post-translational modifications. In particular the protein is phosphorylated on several residues both on the N-terminal functional domain and on the C-terminus core. Different kinases have been identified as responsible for the phosphorylation status of selective residues. The specific change in the phosphorylation status on the different sites alters ANXA1 localization, binding properties and functions. This review shows the physiological relevance of the ANXA1 phosphorylation leading to the conclusion that numerous and different roles of Annexin A1 could be associated with different phosphorylations to alter not only intracellular localization and bindings to its partners but also the extracellular receptor interactions.
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Affiliation(s)
- Cosimo Walter D'Acunto
- Department of Biochemistry and Microbiology, Institute of Chemical Technology, Prague, Technická 5, Prague 6, 166 28, Czech Republic.
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33
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Yogi A, Callera GE, O'Connor S, Antunes TT, Valinsky W, Miquel P, Montezano ACI, Perraud AL, Schmitz C, Shrier A, Touyz RM. Aldosterone signaling through transient receptor potential melastatin 7 cation channel (TRPM7) and its α-kinase domain. Cell Signal 2013; 25:2163-75. [PMID: 23838006 DOI: 10.1016/j.cellsig.2013.07.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 07/01/2013] [Indexed: 12/20/2022]
Abstract
We demonstrated a role for the Mg(2+) transporter TRPM7, a bifunctional protein with channel and α-kinase domains, in aldosterone signaling. Molecular mechanisms underlying this are elusive. Here we investigated the function of TRPM7 and its α-kinase domain on Mg(2+) and pro-inflammatory signaling by aldosterone. Kidney cells (HEK-293) expressing wild-type human TRPM7 (WThTRPM7) or constructs in which the α-kinase domain was deleted (ΔKinase) or rendered inactive with a point mutation in the ATP binding site of the α-kinase domain (K1648R) were studied. Aldosterone rapidly increased [Mg(2+)]i and stimulated NADPH oxidase-derived generation of reactive oxygen species (ROS) in WT hTRPM7 and TRPM7 kinase dead mutant cells. Translocation of annexin-1 and calpain-II and spectrin cleavage (calpain target) were increased by aldosterone in WT hTRPM7 cells but not in α-kinase-deficient cells. Aldosterone stimulated phosphorylation of MAP kinases and increased expression of pro-inflammatory mediators ICAM-1, Cox-2 and PAI-1 in Δkinase and K1648R cells, effects that were inhibited by eplerenone (mineralocorticoid receptor (MR) blocker). 2-APB, a TRPM7 channel inhibitor, abrogated aldosterone-induced Mg(2+) responses in WT hTRPM7 and mutant cells. In 2-APB-treated ΔKinase and K1648R cells, aldosterone-stimulated inflammatory responses were unchanged. These data indicate that aldosterone stimulates Mg(2+) influx and ROS production in a TRPM7-sensitive, kinase-insensitive manner, whereas activation of annexin-1 requires the TRPM7 kinase domain. Moreover TRPM7 α-kinase modulates inflammatory signaling by aldosterone in a TRPM7 channel/Mg(2+)-independent manner. Our findings identify novel mechanisms for non-genomic actions of aldosterone involving differential signaling through MR-activated TRPM7 channel and α-kinase.
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Affiliation(s)
- Alvaro Yogi
- Kidney Research Centre, Dept. of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Canada
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34
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Annexin-phospholipid interactions. Functional implications. Int J Mol Sci 2013; 14:2652-83. [PMID: 23358253 PMCID: PMC3588008 DOI: 10.3390/ijms14022652] [Citation(s) in RCA: 168] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 01/12/2013] [Accepted: 01/15/2013] [Indexed: 02/03/2023] Open
Abstract
Annexins constitute an evolutionary conserved multigene protein superfamily characterized by their ability to interact with biological membranes in a calcium dependent manner. They are expressed by all living organisms with the exception of certain unicellular organisms. The vertebrate annexin core is composed of four (eight in annexin A6) homologous domains of around 70 amino acids, with the overall shape of a slightly bent ring surrounding a central hydrophilic pore. Calcium- and phospholipid-binding sites are located on the convex side while the N-terminus links domains I and IV on the concave side. The N-terminus region shows great variability in length and amino acid sequence and it greatly influences protein stability and specific functions of annexins. These proteins interact mainly with acidic phospholipids, such as phosphatidylserine, but differences are found regarding their affinity for lipids and calcium requirements for the interaction. Annexins are involved in a wide range of intra- and extracellular biological processes in vitro, most of them directly related with the conserved ability to bind to phospholipid bilayers: membrane trafficking, membrane-cytoskeleton anchorage, ion channel activity and regulation, as well as antiinflammatory and anticoagulant activities. However, the in vivo physiological functions of annexins are just beginning to be established.
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35
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Magnesium and its transporters in cancer: a novel paradigm in tumour development. Clin Sci (Lond) 2012; 123:417-27. [PMID: 22671428 DOI: 10.1042/cs20120086] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The relationship between magnesium and cancer is not as simple as could be assumed from the well-established requirement of magnesium for cell proliferation. Basic and pre-clinical studies indicate that magnesium deficiency can have both anti- and pro-tumour effects. In the present review, we briefly outline the new findings on the role of magnesium in angiogenesis and metastatization, and focus on the relationship between tumour cell proliferation and metabolic reprogramming, discussing how magnesium and its transporters are involved in these processes. The role of magnesium in cancer is also critically examined with regard to mitochondrial function, apoptosis and resistance to treatment. Finally, we bring together the latest experimental evidence indicating that alteration in the expression and/or activity of magnesium channels is a frequent finding in cancer cells and human tumour tissues examined to date, and we discuss the potential implications for developing novel diagnostic and therapeutic strategies.
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Song J, Wu B, Beitz E. Functional and evolutional implications of natural channel-enzyme fusion proteins. Biomol Concepts 2011; 2:439-44. [PMID: 25962046 DOI: 10.1515/bmc.2011.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 07/20/2011] [Indexed: 11/15/2022] Open
Abstract
Channeling of ions or substrates across membranes and enzymatic activity are two highly distinct biochemical concepts. They are usually studied by different research groups, which focus on either subject. Nature has provided a challenge for specialized scientists by fusing genes coding for a transmembrane channel domain with an enzyme domain. There are examples of fusion proteins consisting of an N-terminal ion channel or sensor and a C-terminal, cytosolic kinase domain (or other enzymes involved in signaling) of which either domain may influence the functionality of the other. The physiological role of such fusions may reside in coupling ion flux or membrane potential sensing to cellular responses or vice-versa. Other examples can be found in metabolism. We have identified and characterized an ar-senite-conducting aquaglyceroporin carrying a C-terminal ar-senate reductase domain. Here, a function in the detoxification of arsenic is obvious, with the enzyme domain generating the substrate for the channel domain, which immediately shuttles the toxic metabolite out of the cell. We see two advantages in this latter concept: lowering of the cellular toxicity due to rapid release of the substrate and energetic coupling of the reaction enthalpy to extrusion due to high local substrate gradients. In this overview, we summarize and discuss the current view on functional and physiological aspects of channel/enzyme fusion proteins.
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Farooqi AA, Javeed MK, Javed Z, Riaz AM, Mukhtar S, Minhaj S, Abbas S, Bhatti S. TRPM channels: same ballpark, different players, and different rules in immunogenetics. Immunogenetics 2011; 63:773-87. [PMID: 21932052 DOI: 10.1007/s00251-011-0570-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Accepted: 09/02/2011] [Indexed: 11/29/2022]
Abstract
Transient receptor potential (TRP) channels belong to a large family of cation channels and are the "border guards" predominantly localized to the plasma membrane. Research over the years has considerably and highly developed the knowledge of expression and functional aspects of the TRPM channels. A closer look at the channel dynamics has dismantled undeniable substantiation for multifaceted roles for TRPM channel-mediated extracellular Ca(2+) influx in several physiological and pathophysiological functions. Given the wealth of literature unfolding the multiple roles of TRP channels in physiology in a very extensive range of different mammalian tissues, this review confines itself to the literature describing the multiple roles of TRPM channels in diabetes, smooth muscle cell regulation, immunological responses, and emerging aspects of cancer. We also focus on differential activities of TRPM channels after post-transcriptional and post-translational processing and their exquisite roles at various cellular and molecular levels.
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Affiliation(s)
- Ammad Ahmad Farooqi
- Institute of Molecular Biology and Biotechnology (IMBB), The University of Lahore, Punjab, Pakistan.
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Konopka-Postupolska D, Clark G, Hofmann A. Structure, function and membrane interactions of plant annexins: an update. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2011; 181:230-41. [PMID: 21763533 DOI: 10.1016/j.plantsci.2011.05.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/18/2011] [Accepted: 05/18/2011] [Indexed: 05/08/2023]
Abstract
Knowledge accumulated over the past 15 years on plant annexins clearly indicates that this disparate group of proteins builds on the common annexin function of membrane association, but possesses divergent molecular mechanisms. Functionally, the current literature agrees on a key role of plant annexins in stress response processes such as wound healing and drought tolerance. This is contrasted by only few established details of the molecular level mechanisms that are driving these activities. In this review, we appraise the current knowledge of plant annexin molecular, functional and structural properties with a special emphasis on topics of less coverage in recent past overviews. In particular, plant annexin post-translational modification, roles in polar growth and membrane stabilisation processes are discussed.
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