1
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Horvath M, Schrofel A, Kowalska K, Sabo J, Vlasak J, Nourisanami F, Sobol M, Pinkas D, Knapp K, Koupilova N, Novacek J, Veverka V, Lansky Z, Rozbesky D. Structural basis of MICAL autoinhibition. Nat Commun 2024; 15:9810. [PMID: 39532862 PMCID: PMC11557892 DOI: 10.1038/s41467-024-54131-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 11/01/2024] [Indexed: 11/16/2024] Open
Abstract
MICAL proteins play a crucial role in cellular dynamics by binding and disassembling actin filaments, impacting processes like axon guidance, cytokinesis, and cell morphology. Their cellular activity is tightly controlled, as dysregulation can lead to detrimental effects on cellular morphology. Although previous studies have suggested that MICALs are autoinhibited, and require Rab proteins to become active, the detailed molecular mechanisms remained unclear. Here, we report the cryo-EM structure of human MICAL1 at a nominal resolution of 3.1 Å. Structural analyses, alongside biochemical and functional studies, show that MICAL1 autoinhibition is mediated by an intramolecular interaction between its N-terminal catalytic and C-terminal coiled-coil domains, blocking F-actin interaction. Moreover, we demonstrate that allosteric changes in the coiled-coil domain and the binding of the tripartite assembly of CH-L2α1-LIM domains to the coiled-coil domain are crucial for MICAL activation and autoinhibition. These mechanisms appear to be evolutionarily conserved, suggesting a potential universality across the MICAL family.
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Affiliation(s)
- Matej Horvath
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Adam Schrofel
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Karolina Kowalska
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Jan Sabo
- Institute of Biotechnology of the Czech Academy of Sciences, Prague, Czechia
| | - Jonas Vlasak
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Farahdokht Nourisanami
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Margarita Sobol
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Daniel Pinkas
- Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Krystof Knapp
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Nicola Koupilova
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia
| | - Jiri Novacek
- Central European Institute of Technology, Masaryk University, Brno, Czechia
| | - Vaclav Veverka
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
| | - Zdenek Lansky
- Institute of Biotechnology of the Czech Academy of Sciences, Prague, Czechia
| | - Daniel Rozbesky
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czechia.
- Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czechia.
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2
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Lin L, Dong J, Xu S, Xiao J, Yu C, Niu F, Wei Z. Autoinhibition and relief mechanisms for MICAL monooxygenases in F-actin disassembly. Nat Commun 2024; 15:6824. [PMID: 39122694 PMCID: PMC11315924 DOI: 10.1038/s41467-024-50940-7] [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: 02/16/2024] [Accepted: 07/25/2024] [Indexed: 08/12/2024] Open
Abstract
MICAL proteins represent a unique family of actin regulators crucial for synapse development, membrane trafficking, and cytokinesis. Unlike classical actin regulators, MICALs catalyze the oxidation of specific residues within actin filaments to induce robust filament disassembly. The potent activity of MICALs requires tight control to prevent extensive damage to actin cytoskeleton. However, the molecular mechanism governing MICALs' activity regulation remains elusive. Here, we report the cryo-EM structure of MICAL1 in the autoinhibited state, unveiling a head-to-tail interaction that allosterically blocks enzymatic activity. The structure also reveals the assembly of C-terminal domains via a tripartite interdomain interaction, stabilizing the inhibitory conformation of the RBD. Our structural, biochemical, and cellular analyses elucidate a multi-step mechanism to relieve MICAL1 autoinhibition in response to the dual-binding of two Rab effectors, revealing its intricate activity regulation mechanisms. Furthermore, our mutagenesis study of MICAL3 suggests the conserved autoinhibition and relief mechanisms among MICALs.
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Affiliation(s)
- Leishu Lin
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Shenzhen, Guangdong, China
- Department of Neuroscience and Brain Research Center, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jiayuan Dong
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Shenzhen, Guangdong, China
- Department of Neuroscience and Brain Research Center, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Shun Xu
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Shenzhen, Guangdong, China
- Department of Neuroscience and Brain Research Center, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jinman Xiao
- Department of Chemical Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen, Guangdong, China
| | - Cong Yu
- Department of Chemical Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, and Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen, Guangdong, China
- Institute for Biological Electron Microscopy, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Fengfeng Niu
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Shenzhen, Guangdong, China.
- Department of Neuroscience and Brain Research Center, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China.
| | - Zhiyi Wei
- Shenzhen Key Laboratory of Biomolecular Assembling and Regulation, Shenzhen, Guangdong, China.
- Department of Neuroscience and Brain Research Center, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, China.
- Institute for Biological Electron Microscopy, Southern University of Science and Technology, Shenzhen, Guangdong, China.
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3
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Rajan S, Terman JR, Reisler E. MICAL-mediated oxidation of actin and its effects on cytoskeletal and cellular dynamics. Front Cell Dev Biol 2023; 11:1124202. [PMID: 36875759 PMCID: PMC9982024 DOI: 10.3389/fcell.2023.1124202] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/02/2023] [Indexed: 02/19/2023] Open
Abstract
Actin and its dynamic structural remodelings are involved in multiple cellular functions, including maintaining cell shape and integrity, cytokinesis, motility, navigation, and muscle contraction. Many actin-binding proteins regulate the cytoskeleton to facilitate these functions. Recently, actin's post-translational modifications (PTMs) and their importance to actin functions have gained increasing recognition. The MICAL family of proteins has emerged as important actin regulatory oxidation-reduction (Redox) enzymes, influencing actin's properties both in vitro and in vivo. MICALs specifically bind to actin filaments and selectively oxidize actin's methionine residues 44 and 47, which perturbs filaments' structure and leads to their disassembly. This review provides an overview of the MICALs and the impact of MICAL-mediated oxidation on actin's properties, including its assembly and disassembly, effects on other actin-binding proteins, and on cells and tissue systems.
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Affiliation(s)
- Sudeepa Rajan
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jonathan R. Terman
- Departments of Neuroscience and Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Emil Reisler
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, United States
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
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4
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McGarry DJ, Castino G, Lilla S, Carnet A, Kelly L, Micovic K, Zanivan S, Olson MF. MICAL1 activation by PAK1 mediates actin filament disassembly. Cell Rep 2022; 41:111442. [PMID: 36198272 DOI: 10.1016/j.celrep.2022.111442] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 06/14/2022] [Accepted: 09/09/2022] [Indexed: 11/03/2022] Open
Abstract
The MICAL1 monooxygenase is an important regulator of filamentous actin (F-actin) structures. Although MICAL1 has been shown to be regulated via protein-protein interactions at the autoinhibitory carboxyl terminus, a link between actin-regulatory RHO GTPase signaling pathways and MICAL1 has not been established. We show that the CDC42 GTPase effector PAK1 associates with and phosphorylates MICAL1 on two serine residues, leading to accelerated F-actin disassembly. PAK1 binds to the amino-terminal catalytic monooxygenase and calponin homology domains, distinct from the autoinhibitory carboxyl terminus. Extracellular ligand stimulation leads to PAK-dependent phosphorylation, linking external signals to MICAL1 phosphorylation. Mass spectrometry indicates that MICAL1 co-expression with CDC42 and PAK1 increases MICAL1 association with hundreds of proteins, including the previously described MICAL1-interacting proteins RAB10 and RAB7A. These results provide insights into a redox-mediated pathway linking extracellular signals to cytoskeleton regulation via a RHO GTPase and indicate a means of communication between RHO and RAB GTPases.
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Affiliation(s)
- David J McGarry
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Giovanni Castino
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Sergio Lilla
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK
| | - Alexandre Carnet
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Loughlin Kelly
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Katarina Micovic
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada
| | - Sara Zanivan
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK; Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Michael F Olson
- Department of Chemistry and Biology, Toronto Metropolitan University, Toronto, ON M5B 2K3, Canada.
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5
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Rouyère C, Serrano T, Frémont S, Echard A. Oxidation and reduction of actin: Origin, impact in vitro and functional consequences in vivo. Eur J Cell Biol 2022; 101:151249. [PMID: 35716426 DOI: 10.1016/j.ejcb.2022.151249] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 05/13/2022] [Accepted: 06/06/2022] [Indexed: 11/15/2022] Open
Abstract
Actin is among the most abundant proteins in eukaryotic cells and assembles into dynamic filamentous networks regulated by many actin binding proteins. The actin cytoskeleton must be finely tuned, both in space and time, to fulfill key cellular functions such as cell division, cell shape changes, phagocytosis and cell migration. While actin oxidation by reactive oxygen species (ROS) at non-physiological levels are known for long to impact on actin polymerization and on the cellular actin cytoskeleton, growing evidence shows that direct and reversible oxidation/reduction of specific actin amino acids plays an important and physiological role in regulating the actin cytoskeleton. In this review, we describe which actin amino acid residues can be selectively oxidized and reduced in many different ways (e.g. disulfide bond formation, glutathionylation, carbonylation, nitration, nitrosylation and other oxidations), the cellular enzymes at the origin of these post-translational modifications, and the impact of actin redox modifications both in vitro and in vivo. We show that the regulated balance of oxidation and reduction of key actin amino acid residues contributes to the control of actin filament polymerization and disassembly at the subcellular scale and highlight how improper redox modifications of actin can lead to pathological conditions.
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Affiliation(s)
- Clémentine Rouyère
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Membrane Traffic and Cell Division Unit, 25-28 rue du Dr Roux, F-75015 Paris, France; Sorbonne Université, Collège Doctoral, F-75005 Paris, France
| | - Thomas Serrano
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Membrane Traffic and Cell Division Unit, 25-28 rue du Dr Roux, F-75015 Paris, France
| | - Stéphane Frémont
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Membrane Traffic and Cell Division Unit, 25-28 rue du Dr Roux, F-75015 Paris, France
| | - Arnaud Echard
- Institut Pasteur, Université Paris Cité, CNRS UMR3691, Membrane Traffic and Cell Division Unit, 25-28 rue du Dr Roux, F-75015 Paris, France.
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6
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Haikazian S, Olson MF. MICAL1 Monooxygenase in Autosomal Dominant Lateral Temporal Epilepsy: Role in Cytoskeletal Regulation and Relation to Cancer. Genes (Basel) 2022; 13:715. [PMID: 35627100 PMCID: PMC9141472 DOI: 10.3390/genes13050715] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 12/04/2022] Open
Abstract
Autosomal dominant lateral temporal epilepsy (ADLTE) is a genetic focal epilepsy associated with mutations in the LGI1, RELN, and MICAL1 genes. A previous study linking ADLTE with two MICAL1 mutations that resulted in the substitution of a highly conserved glycine residue for serine (G150S) or a frameshift mutation that swapped the last three C-terminal amino acids for 59 extra residues (A1065fs) concluded that the mutations increased enzymatic activity and promoted cell contraction. The roles of the Molecule Interacting with CasL 1 (MICAL1) protein in tightly regulated semaphorin signaling pathways suggest that activating MICAL1 mutations could result in defects in axonal guidance during neuronal development. Further studies would help to illuminate the causal relationships of these point mutations with ADLTE. In this review, we discuss the proposed pathogenesis caused by mutations in these three genes, with a particular emphasis on the G150S point mutation discovered in MICAL1. We also consider whether these types of activating MICAL1 mutations could be linked to cancer.
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Affiliation(s)
| | - Michael F. Olson
- Department of Chemistry and Biology, Ryerson University, Toronto, ON M5B 2K3, Canada;
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7
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Signal-regulated oxidation of proteins via MICAL. Biochem Soc Trans 2021; 48:613-620. [PMID: 32219383 DOI: 10.1042/bst20190866] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/09/2020] [Accepted: 03/11/2020] [Indexed: 12/12/2022]
Abstract
Processing of and responding to various signals is an essential cellular function that influences survival, homeostasis, development, and cell death. Extra- or intracellular signals are perceived via specific receptors and transduced in a particular signalling pathway that results in a precise response. Reversible post-translational redox modifications of cysteinyl and methionyl residues have been characterised in countless signal transduction pathways. Due to the low reactivity of most sulfur-containing amino acid side chains with hydrogen peroxide, for instance, and also to ensure specificity, redox signalling requires catalysis, just like phosphorylation signalling requires kinases and phosphatases. While reducing enzymes of both cysteinyl- and methionyl-derivates have been characterised in great detail before, the discovery and characterisation of MICAL proteins evinced the first examples of specific oxidases in signal transduction. This article provides an overview of the functions of MICAL proteins in the redox regulation of cellular functions.
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8
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Lucken-Ardjomande Häsler S, Vallis Y, Pasche M, McMahon HT. GRAF2, WDR44, and MICAL1 mediate Rab8/10/11-dependent export of E-cadherin, MMP14, and CFTR ΔF508. J Cell Biol 2021; 219:151714. [PMID: 32344433 PMCID: PMC7199855 DOI: 10.1083/jcb.201811014] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 11/07/2019] [Accepted: 02/26/2020] [Indexed: 02/07/2023] Open
Abstract
In addition to the classical pathway of secretion, some transmembrane proteins reach the plasma membrane through alternative routes. Several proteins transit through endosomes and are exported in a Rab8-, Rab10-, and/or Rab11-dependent manner. GRAFs are membrane-binding proteins associated with tubules and vesicles. We found extensive colocalization of GRAF1b/2 with Rab8a/b and partial with Rab10. We identified MICAL1 and WDR44 as direct GRAF-binding partners. MICAL1 links GRAF1b/2 to Rab8a/b and Rab10, and WDR44 binds Rab11. Endogenous WDR44 labels a subset of tubular endosomes, which are closely aligned with the ER via binding to VAPA/B. With its BAR domain, GRAF2 can tubulate membranes, and in its absence WDR44 tubules are not observed. We show that GRAF2 and WDR44 are essential for the export of neosynthesized E-cadherin, MMP14, and CFTR ΔF508, three proteins whose exocytosis is sensitive to ER stress. Overexpression of dominant negative mutants of GRAF1/2, WDR44, and MICAL1 also interferes with it, facilitating future studies of Rab8/10/11-dependent exocytic pathways of central importance in biology.
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Affiliation(s)
| | - Yvonne Vallis
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Mathias Pasche
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
| | - Harvey T McMahon
- Medical Research Council Laboratory of Molecular Biology, Cambridge, UK
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9
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Konstantinidis K, Bezzerides VJ, Lai L, Isbell HM, Wei AC, Wu Y, Viswanathan MC, Blum ID, Granger JM, Heims-Waldron D, Zhang D, Luczak ED, Murphy KR, Lu F, Gratz DH, Manta B, Wang Q, Wang Q, Kolodkin AL, Gladyshev VN, Hund TJ, Pu WT, Wu MN, Cammarato A, Bianchet MA, Shea MA, Levine RL, Anderson ME. MICAL1 constrains cardiac stress responses and protects against disease by oxidizing CaMKII. J Clin Invest 2021; 130:4663-4678. [PMID: 32749237 PMCID: PMC7456244 DOI: 10.1172/jci133181] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 05/29/2020] [Indexed: 01/22/2023] Open
Abstract
Oxidant stress can contribute to health and disease. Here we show that invertebrates and vertebrates share a common stereospecific redox pathway that protects against pathological responses to stress, at the cost of reduced physiological performance, by constraining Ca2+/calmodulin-dependent protein kinase II (CaMKII) activity. MICAL1, a methionine monooxygenase thought to exclusively target actin, and MSRB, a methionine reductase, control the stereospecific redox status of M308, a highly conserved residue in the calmodulin-binding (CaM-binding) domain of CaMKII. Oxidized or mutant M308 (M308V) decreased CaM binding and CaMKII activity, while absence of MICAL1 in mice caused cardiac arrhythmias and premature death due to CaMKII hyperactivation. Mimicking the effects of M308 oxidation decreased fight-or-flight responses in mice, strikingly impaired heart function in Drosophila melanogaster, and caused disease protection in human induced pluripotent stem cell-derived cardiomyocytes with catecholaminergic polymorphic ventricular tachycardia, a CaMKII-sensitive genetic arrhythmia syndrome. Our studies identify a stereospecific redox pathway that regulates cardiac physiological and pathological responses to stress across species.
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Affiliation(s)
- Klitos Konstantinidis
- Division of Cardiology.,Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | | | - Lo Lai
- Laboratory of Biochemistry, National Heart, Lung, and Blood Institute, Bethesda, Maryland, USA
| | - Holly M Isbell
- Department of Biochemistry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - An-Chi Wei
- Department of Electrical Engineering, Graduate Institute of Biomedical and Bioinformatics, National Taiwan University, Taipei City, Taiwan
| | - Yuejin Wu
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Meera C Viswanathan
- Division of Cardiology.,Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Ian D Blum
- Department of Neurology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Jonathan M Granger
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | | | - Donghui Zhang
- Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts, USA.,State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, China
| | - Elizabeth D Luczak
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Kevin R Murphy
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Fujian Lu
- Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts, USA
| | - Daniel H Gratz
- Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.,Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA
| | - Bruno Manta
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Qiang Wang
- Department of Neurology, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qinchuan Wang
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA
| | - Alex L Kolodkin
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, Maryland, USA
| | - Vadim N Gladyshev
- Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Thomas J Hund
- Frick Center for Heart Failure and Arrhythmia, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.,Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, USA
| | - William T Pu
- Department of Cardiology, Boston Children's Hospital, Boston, Massachusetts, USA.,Harvard Stem Cell Institute, Cambridge, Massachusetts, USA
| | - Mark N Wu
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Neurology, Johns Hopkins University, Baltimore, Maryland, USA.,Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, Maryland, USA.,Department of Genetic Medicine
| | - Anthony Cammarato
- Division of Cardiology.,Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Physiology, and
| | - Mario A Bianchet
- Department of Neurology, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Biophysics and Biophysical Chemistry, Johns Hopkins University, Baltimore, Maryland, USA
| | - Madeline A Shea
- Department of Biochemistry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Rodney L Levine
- Laboratory of Biochemistry, National Heart, Lung, and Blood Institute, Bethesda, Maryland, USA
| | - Mark E Anderson
- Division of Cardiology.,Department of Medicine, Johns Hopkins University, Baltimore, Maryland, USA.,Department of Physiology, and
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10
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Kim J, Lee H, Roh YJ, Kim HU, Shin D, Kim S, Son J, Lee A, Kim M, Park J, Hwang SY, Kim K, Lee YK, Jung HS, Hwang KY, Lee BC. Structural and kinetic insights into flavin-containing monooxygenase and calponin-homology domains in human MICAL3. IUCRJ 2020; 7:90-99. [PMID: 31949908 PMCID: PMC6949599 DOI: 10.1107/s2052252519015409] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
MICAL is an oxidoreductase that participates in cytoskeleton reorganization via actin disassembly in the presence of NADPH. Although three MICALs (MICAL1, MICAL2 and MICAL3) have been identified in mammals, only the structure of mouse MICAL1 has been reported. Here, the first crystal structure of human MICAL3, which contains the flavin-containing monooxygenase (FMO) and calponin-homology (CH) domains, is reported. MICAL3 has an FAD/NADP-binding Rossmann-fold domain for mono-oxygenase activity like MICAL1. The FMO and CH domains of both MICAL3 and MICAL1 are highly similar in structure, but superimposition of the two structures shows a different relative position of the CH domain in the asymmetric unit. Based on kinetic analyses, the catalytic efficiency of MICAL3 dramatically increased on adding F-actin only when the CH domain was available. However, this did not occur when two residues, Glu213 and Arg530, were mutated in the FMO and CH domains, respectively. Overall, MICAL3 is structurally highly similar to MICAL1, which suggests that they may adopt the same catalytic mechanism, but the difference in the relative position of the CH domain produces a difference in F-actin substrate specificity.
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Affiliation(s)
- Junsoo Kim
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Haemin Lee
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Yeon Jin Roh
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Han-ul Kim
- Biochemistry Laboratory, Department of Biosystems and Biotechnology, Kangwon National University, 1 Kangwondaekak-gil, Chuncheon-si, Gangwon-do 24341, Republic of Korea
| | - Donghyuk Shin
- Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Sorah Kim
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jonghyeon Son
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Aro Lee
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Minseo Kim
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Junga Park
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Seong Yun Hwang
- Department of Biology, College of Natural Sciences, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Kyunghwan Kim
- Department of Biology, College of Natural Sciences, Chungbuk National University, Cheongju, Chungbuk 361-763, Republic of Korea
| | - Yong Kwon Lee
- Department of Culinary Art and Food Service Management, Yuhan University, 590 Gyeongin-ro, Bucheon-si, Gyeonggi-do 14780, Republic of Korea
| | - Hyun Suk Jung
- Biochemistry Laboratory, Department of Biosystems and Biotechnology, Kangwon National University, 1 Kangwondaekak-gil, Chuncheon-si, Gangwon-do 24341, Republic of Korea
| | - Kwang Yeon Hwang
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Byung Cheon Lee
- College of Life Sciences and Biotechnology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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11
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Esposito A, Ventura V, Petoukhov MV, Rai A, Svergun DI, Vanoni MA. Human MICAL1: Activation by the small GTPase Rab8 and small-angle X-ray scattering studies on the oligomerization state of MICAL1 and its complex with Rab8. Protein Sci 2018; 28:150-166. [PMID: 30242933 DOI: 10.1002/pro.3512] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 09/08/2018] [Accepted: 09/10/2018] [Indexed: 12/18/2022]
Abstract
Human MICAL1 is a member of a recently discovered family of multidomain proteins that couple a FAD-containing monooxygenase-like domain to typical protein interaction domains. Growing evidence implicates the NADPH oxidase reaction catalyzed by the flavoprotein domain in generation of hydrogen peroxide as a second messenger in an increasing number of cell types and as a specific modulator of actin filaments stability. Several proteins of the Rab families of small GTPases are emerging as regulators of MICAL activity by binding to its C-terminal helical domain presumably shifting the equilibrium from the free - auto-inhibited - conformation to the active one. We here extend the characterization of the MICAL1-Rab8 interaction and show that indeed Rab8, in the active GTP-bound state, stabilizes the active MICAL1 conformation causing a specific four-fold increase of kcat of the NADPH oxidase reaction. Kinetic data and small-angle X-ray scattering (SAXS) measurements support the formation of a 1:1 complex between full-length MICAL1 and Rab8 with an apparent dissociation constant of approximately 8 μM. This finding supports the hypothesis that Rab8 is a physiological regulator of MICAL1 activity and shows how the protein region preceding the C-terminal Rab-binding domain may mask one of the Rab-binding sites detected with the isolated C-terminal fragment. SAXS-based modeling allowed us to propose the first model of the free full-length MICAL1, which is consistent with an auto-inhibited conformation in which the C-terminal region prevents catalysis by interfering with the conformational changes that are predicted to occur during the catalytic cycle.
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Affiliation(s)
- Alessandro Esposito
- Department of Biosciences, University of Milan, Via Celoria 26, 20133, Milan, Italy
| | - Valeria Ventura
- Department of Biosciences, University of Milan, Via Celoria 26, 20133, Milan, Italy
| | - Maxim V Petoukhov
- A.V. Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Leninsky prospect 59, 119333, Moscow, Russia.,A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences, Leninsky Prospect 31, 119071, Moscow, Russia.,N.N. Semenov Institute of Chemical Physics of Russian Academy of Sciences, Kosygina str. 4, 119991, Moscow, Russia.,European Molecular Biology Laboratory, EMBL Hamburg Unit, c/o DESY, Notkestrasse 85, D-22607, Hamburg, Germany
| | - Amrita Rai
- Department of Structural Biochemistry, Max-Planck Institute of Molecular Physiology, Otto-Hahn-Str. 11, 44227, Dortmund
| | - Dmitri I Svergun
- European Molecular Biology Laboratory, EMBL Hamburg Unit, c/o DESY, Notkestrasse 85, D-22607, Hamburg, Germany
| | - Maria A Vanoni
- Department of Biosciences, University of Milan, Via Celoria 26, 20133, Milan, Italy
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12
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Wu H, Yesilyurt HG, Yoon J, Terman JR. The MICALs are a Family of F-actin Dismantling Oxidoreductases Conserved from Drosophila to Humans. Sci Rep 2018; 8:937. [PMID: 29343822 PMCID: PMC5772675 DOI: 10.1038/s41598-017-17943-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 11/30/2017] [Indexed: 12/27/2022] Open
Abstract
Cellular form and function – and thus normal development and physiology – are specified via proteins that control the organization and dynamic properties of the actin cytoskeleton. Using the Drosophila model, we have recently identified an unusual actin regulatory enzyme, Mical, which is directly activated by F-actin to selectively post-translationally oxidize and destabilize filaments – regulating numerous cellular behaviors. Mical proteins are also present in mammals, but their actin regulatory properties, including comparisons among different family members, remain poorly defined. We now find that each human MICAL family member, MICAL-1, MICAL-2, and MICAL-3, directly induces F-actin dismantling and controls F-actin-mediated cellular remodeling. Specifically, each human MICAL selectively associates with F-actin, which directly induces MICALs catalytic activity. We also find that each human MICAL uses an NADPH-dependent Redox activity to post-translationally oxidize actin’s methionine (M) M44/M47 residues, directly dismantling filaments and limiting new polymerization. Genetic experiments also demonstrate that each human MICAL drives F-actin disassembly in vivo, reshaping cells and their membranous extensions. Our results go on to reveal that MsrB/SelR reductase enzymes counteract each MICAL’s effect on F-actin in vitro and in vivo. Collectively, our results therefore define the MICALs as an important phylogenetically-conserved family of catalytically-acting F-actin disassembly factors.
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Affiliation(s)
- Heng Wu
- Departments of Neuroscience and Pharmacology, Harold C Simmons Comprehensive Cancer Center, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Hunkar Gizem Yesilyurt
- Departments of Neuroscience and Pharmacology, Harold C Simmons Comprehensive Cancer Center, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Jimok Yoon
- Departments of Neuroscience and Pharmacology, Harold C Simmons Comprehensive Cancer Center, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.,Drug Development Center, SK biopharmaceuticals Co. Ltd., Seongnam, 13494, Korea
| | - Jonathan R Terman
- Departments of Neuroscience and Pharmacology, Harold C Simmons Comprehensive Cancer Center, The University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.
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13
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Cai Y, Lu J, Tang F. Overexpression of MICAL2, a novel tumor-promoting factor, accelerates tumor progression through regulating cell proliferation and EMT. J Cancer 2018; 9:521-527. [PMID: 29483957 PMCID: PMC5820919 DOI: 10.7150/jca.22355] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Accepted: 10/20/2017] [Indexed: 12/11/2022] Open
Abstract
Molecule interacting with CasL 2 (MICAL2), a microtubule associated monooxygenase, is involved in cell growth, axon guidance, vesicle trafficking and apoptosis. Recent studies have demonstrated that MICAL2 is highly expressed in tumor and accelerates tumor progression and it is deemed to be a novel tumor-promoting factor. MICAL2 overexpression increases cell proliferation to accelerate tumor growth, and MICAL2 also promotes epithelial-mesenchymal transition (EMT)-related proteins to increase cancer cell metastasis. On mechanism, MICAL2 induces EMT by regulating SRF (serum response factor)/MRTF-A (myocardin related transcription factor A) signaling, Semaphorin/Plexin pathway and inducing ROS (Reactive oxygen species) production. In the present review, we introduced MICAL family, expatiated the structure and functions of MICALs, and summarized the mechanisms of MICAL2 involving tumor progression. The challenges and perspectives for MICAL2 in tumor are also discussed.
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Affiliation(s)
- Yongqiang Cai
- Clinical Laboratory and Medical Research Center, Zhuhai Hospital, Jinan University, Zhuhai 519000, Guangdong, China
| | - Jinping Lu
- Clinical Laboratory and Medical Research Center, Zhuhai Hospital, Jinan University, Zhuhai 519000, Guangdong, China
| | - Faqing Tang
- Clinical Laboratory and Medical Research Center, Zhuhai Hospital, Jinan University, Zhuhai 519000, Guangdong, China
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14
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Liu Q, Remmelzwaal S, Heck AJR, Akhmanova A, Liu F. Facilitating identification of minimal protein binding domains by cross-linking mass spectrometry. Sci Rep 2017; 7:13453. [PMID: 29044157 PMCID: PMC5647383 DOI: 10.1038/s41598-017-13663-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 09/25/2017] [Indexed: 10/27/2022] Open
Abstract
Characterization of protein interaction domains is crucial for understanding protein functions. Here we combine cross-linking mass spectrometry (XL-MS) with deletion analysis to accurately locate minimal protein interaction domains. As a proof of concept, we investigated in detail the binding interfaces of two protein assemblies: the complex formed by MICAL3, ELKS and Rab8A, which is involved in exocytosis, and the complex of SLAIN2, CLASP2 and ch-TOG, which controls microtubule dynamics. We found that XL-MS provides valuable information to efficiently guide the design of protein fragments that are essential for protein interaction. However, we also observed a number of cross-links between polypeptide regions that were dispensable for complex formation, especially among intrinsically disordered sequences. Collectively, our results indicate that XL-MS, which renders distance restrains of linked residue pairs, accelerates the characterization of protein binding regions in combination with other biochemical approaches.
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Affiliation(s)
- Qingyang Liu
- Cell Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Sanne Remmelzwaal
- Cell Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH, Utrecht, The Netherlands
| | - Anna Akhmanova
- Cell Biology, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands.
| | - Fan Liu
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH, Utrecht, The Netherlands.
- Leibniz Institute of Molecular Pharmacology (FMP), Robert-Rössle-Straße 10, 13125, Berlin, Germany.
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15
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Abstract
Protein function can be regulated via post-translational modifications by numerous enzymatic and non-enzymatic mechanisms, including oxidation of cysteine and methionine residues. Redox-dependent regulatory mechanisms have been identified for nearly every cellular process, but the major paradigm has been that cellular components are oxidized (damaged) by reactive oxygen species (ROS) in a relatively unspecific way, and then reduced (repaired) by designated reductases. While this scheme may work with cysteine, it cannot be ascribed to other residues, such as methionine, whose reaction with ROS is too slow to be biologically relevant. However, methionine is clearly oxidized in vivo and enzymes for its stereoselective reduction are present in all three domains of life. Here, we revisit the chemistry and biology of methionine oxidation, with emphasis on its generation by enzymes from the monooxygenase family. Particular attention is placed on MICALs, a recently discovered family of proteins that harbor an unusual flavin-monooxygenase domain with an NADPH-dependent methionine sulfoxidase activity. Based on structural and kinetic information we provide a rational framework to explain MICAL mechanism, inhibition, and regulation. Methionine residues that are targeted by MICALs are reduced back by methionine sulfoxide reductases, suggesting that reversible methionine oxidation may be a general mechanism analogous to the regulation by phosphorylation by kinases/phosphatases. The identification of new enzymes that catalyze the oxidation of methionine will open a new area of research at the forefront of redox signaling.
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Affiliation(s)
- Bruno Manta
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Vadim N Gladyshev
- Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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16
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Vanoni MA. Structure-function studies of MICAL, the unusual multidomain flavoenzyme involved in actin cytoskeleton dynamics. Arch Biochem Biophys 2017; 632:118-141. [PMID: 28602956 DOI: 10.1016/j.abb.2017.06.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 05/27/2017] [Accepted: 06/05/2017] [Indexed: 12/11/2022]
Abstract
MICAL (from the Molecule Interacting with CasL) indicates a family of multidomain proteins conserved from insects to humans, which are increasingly attracting attention for their participation in the control of actin cytoskeleton dynamics, and, therefore, in the several related key processes in health and disease. MICAL is unique among actin binding proteins because it catalyzes a NADPH-dependent F-actin depolymerizing reaction. This unprecedented reaction is associated with its N-terminal FAD-containing domain that is structurally related to p-hydroxybenzoate hydroxylase, the prototype of aromatic monooxygenases, but catalyzes a strong NADPH oxidase activity in the free state. This review will focus on the known structural and functional properties of MICAL forms in order to provide an overview of the arguments supporting the current hypotheses on the possible mechanism of action of MICAL in the free and F-actin bound state, on the modulating effect of the CH, LIM, and C-terminal domains that follow the catalytic flavoprotein domain on the MICAL activities, as well as that of small molecules and proteins interacting with MICAL.
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Affiliation(s)
- Maria Antonietta Vanoni
- Department of Biosciences, Università degli Studi di Milano, Via Celoria 26, 20133 Milano, Italy.
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17
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Frémont S, Romet-Lemonne G, Houdusse A, Echard A. Emerging roles of MICAL family proteins - from actin oxidation to membrane trafficking during cytokinesis. J Cell Sci 2017; 130:1509-1517. [PMID: 28373242 DOI: 10.1242/jcs.202028] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cytokinetic abscission is the terminal step of cell division, leading to the physical separation of the two daughter cells. The exact mechanism mediating the final scission of the intercellular bridge connecting the dividing cells is not fully understood, but requires the local constriction of endosomal sorting complex required for transport (ESCRT)-III-dependent helices, as well as remodelling of lipids and the cytoskeleton at the site of abscission. In particular, microtubules and actin filaments must be locally disassembled for successful abscission. However, the mechanism that actively removes actin during abscission is poorly understood. In this Commentary, we will focus on the latest findings regarding the emerging role of the MICAL family of oxidoreductases in F-actin disassembly and describe how Rab GTPases regulate their enzymatic activity. We will also discuss the recently reported role of MICAL1 in controlling F-actin clearance in the ESCRT-III-mediated step of cytokinetic abscission. In addition, we will highlight how two other members of the MICAL family (MICAL3 and MICAL-L1) contribute to cytokinesis by regulating membrane trafficking. Taken together, these findings establish the MICAL family as a key regulator of actin cytoskeleton dynamics and membrane trafficking during cell division.
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Affiliation(s)
- Stéphane Frémont
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection department, Institut Pasteur, 25-28 rue du Dr Roux, Paris CEDEX 15 75724, France .,Centre National de la Recherche Scientifique UMR3691, Paris 75015, France
| | - Guillaume Romet-Lemonne
- Institut Jacques Monod, CNRS, Université Paris Diderot, Université Sorbonne Paris Cité, Paris 75013, France
| | - Anne Houdusse
- Structural Motility, Institut Curie, PSL Research University, CNRS, UMR 144, Paris F-75005, France
| | - Arnaud Echard
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection department, Institut Pasteur, 25-28 rue du Dr Roux, Paris CEDEX 15 75724, France .,Centre National de la Recherche Scientifique UMR3691, Paris 75015, France
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18
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Frémont S, Hammich H, Bai J, Wioland H, Klinkert K, Rocancourt M, Kikuti C, Stroebel D, Romet-Lemonne G, Pylypenko O, Houdusse A, Echard A. Oxidation of F-actin controls the terminal steps of cytokinesis. Nat Commun 2017; 8:14528. [PMID: 28230050 PMCID: PMC5331220 DOI: 10.1038/ncomms14528] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Accepted: 01/04/2017] [Indexed: 12/30/2022] Open
Abstract
Cytokinetic abscission, the terminal step of cell division, crucially depends on the local constriction of ESCRT-III helices after cytoskeleton disassembly. While the microtubules of the intercellular bridge are cut by the ESCRT-associated enzyme Spastin, the mechanism that clears F-actin at the abscission site is unknown. Here we show that oxidation-mediated depolymerization of actin by the redox enzyme MICAL1 is key for ESCRT-III recruitment and successful abscission. MICAL1 is recruited to the abscission site by the Rab35 GTPase through a direct interaction with a flat three-helix domain found in MICAL1 C terminus. Mechanistically, in vitro assays on single actin filaments demonstrate that MICAL1 is activated by Rab35. Moreover, in our experimental conditions, MICAL1 does not act as a severing enzyme, as initially thought, but instead induces F-actin depolymerization from both ends. Our work reveals an unexpected role for oxidoreduction in triggering local actin depolymerization to control a fundamental step of cell division. Cytokinetic abscission relies on the local constriction after cytoskeleton disassembly, but it is not known how the actin filaments are disassembled. Here, the authors show that the redox enzyme MICAL1 is recruited by Rab35 and induces oxidation-mediated depolymerization of actin, which is required to recruit ESCRT-III and complete abscission.
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Affiliation(s)
- Stéphane Frémont
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection Department Institut Pasteur, 25-28 rue du Dr Roux, 75724 Paris Cedex 15, France.,Centre National de la Recherche Scientifique UMR3691, 75015 Paris, France
| | - Hussein Hammich
- Structural Motility, Institut Curie, PSL Research University, CNRS, UMR 144, F-75005 Paris, France
| | - Jian Bai
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection Department Institut Pasteur, 25-28 rue du Dr Roux, 75724 Paris Cedex 15, France.,Centre National de la Recherche Scientifique UMR3691, 75015 Paris, France.,Sorbonne Universités, UPMC Univ Paris06, Sorbonne Universités, IFD, 4 Place Jussieu, 75252 Paris Cedex 15, France
| | - Hugo Wioland
- Institut Jacques Monod, CNRS, Université Paris Diderot, Université Sorbonne Paris Cité, 75013 Paris, France
| | - Kerstin Klinkert
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection Department Institut Pasteur, 25-28 rue du Dr Roux, 75724 Paris Cedex 15, France.,Centre National de la Recherche Scientifique UMR3691, 75015 Paris, France.,Sorbonne Universités, UPMC Univ Paris06, Sorbonne Universités, IFD, 4 Place Jussieu, 75252 Paris Cedex 15, France
| | - Murielle Rocancourt
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection Department Institut Pasteur, 25-28 rue du Dr Roux, 75724 Paris Cedex 15, France.,Centre National de la Recherche Scientifique UMR3691, 75015 Paris, France
| | - Carlos Kikuti
- Structural Motility, Institut Curie, PSL Research University, CNRS, UMR 144, F-75005 Paris, France
| | - David Stroebel
- Ecole Normale Supérieure, PSL Research University, CNRS, INSERM, Institut de Biologie de l'École Normale Supérieure (IBENS), 75005 Paris, France
| | - Guillaume Romet-Lemonne
- Institut Jacques Monod, CNRS, Université Paris Diderot, Université Sorbonne Paris Cité, 75013 Paris, France
| | - Olena Pylypenko
- Structural Motility, Institut Curie, PSL Research University, CNRS, UMR 144, F-75005 Paris, France
| | - Anne Houdusse
- Structural Motility, Institut Curie, PSL Research University, CNRS, UMR 144, F-75005 Paris, France
| | - Arnaud Echard
- Membrane Traffic and Cell Division Lab, Cell Biology and Infection Department Institut Pasteur, 25-28 rue du Dr Roux, 75724 Paris Cedex 15, France.,Centre National de la Recherche Scientifique UMR3691, 75015 Paris, France
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19
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Structural studies of RNA-protein complexes: A hybrid approach involving hydrodynamics, scattering, and computational methods. Methods 2016; 118-119:146-162. [PMID: 27939506 DOI: 10.1016/j.ymeth.2016.12.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/01/2016] [Accepted: 12/05/2016] [Indexed: 01/01/2023] Open
Abstract
The diverse functional cellular roles played by ribonucleic acids (RNA) have emphasized the need to develop rapid and accurate methodologies to elucidate the relationship between the structure and function of RNA. Structural biology tools such as X-ray crystallography and Nuclear Magnetic Resonance are highly useful methods to obtain atomic-level resolution models of macromolecules. However, both methods have sample, time, and technical limitations that prevent their application to a number of macromolecules of interest. An emerging alternative to high-resolution structural techniques is to employ a hybrid approach that combines low-resolution shape information about macromolecules and their complexes from experimental hydrodynamic (e.g. analytical ultracentrifugation) and solution scattering measurements (e.g., solution X-ray or neutron scattering), with computational modeling to obtain atomic-level models. While promising, scattering methods rely on aggregation-free, monodispersed preparations and therefore the careful development of a quality control pipeline is fundamental to an unbiased and reliable structural determination. This review article describes hydrodynamic techniques that are highly valuable for homogeneity studies, scattering techniques useful to study the low-resolution shape, and strategies for computational modeling to obtain high-resolution 3D structural models of RNAs, proteins, and RNA-protein complexes.
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20
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Grintsevich EE, Yesilyurt HG, Rich SK, Hung RJ, Terman JR, Reisler E. F-actin dismantling through a redox-driven synergy between Mical and cofilin. Nat Cell Biol 2016; 18:876-85. [PMID: 27454820 PMCID: PMC4966907 DOI: 10.1038/ncb3390] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 06/21/2016] [Indexed: 02/06/2023]
Abstract
Numerous cellular functions depend on actin filament (F-actin) disassembly. The
best-characterized disassembly proteins, the ADF/cofilins/twinstar, sever filaments and
recycle monomers to promote actin assembly. Cofilin is also a relatively weak actin
disassembler, posing questions about mechanisms of cellular F-actin destabilization. Here
we uncover a key link to targeted F-actin disassembly by finding that F-actin is
efficiently dismantled through a post-translational-mediated synergism between cofilin and
the actin-oxidizing enzyme Mical. We find that Mical-mediated oxidation of actin improves
cofilin binding to filaments, where their combined effect dramatically accelerates F-actin
disassembly compared to either effector alone. This synergism is also necessary and
sufficient for F-actin disassembly in vivo, magnifying the effects of
both Mical and cofilin on cellular remodeling, axon guidance, and Semaphorin/Plexin
repulsion. Mical and cofilin, therefore, form a Redox-dependent synergistic pair that
promotes F-actin instability by rapidly dismantling F-actin and generating
post-translationally modified actin that has altered assembly properties.
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Affiliation(s)
- Elena E Grintsevich
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California 90095, USA
| | - Hunkar Gizem Yesilyurt
- Departments of Neuroscience and Pharmacology and Neuroscience Graduate Program, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Shannon K Rich
- Departments of Neuroscience and Pharmacology and Neuroscience Graduate Program, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Ruei-Jiun Hung
- Departments of Neuroscience and Pharmacology and Neuroscience Graduate Program, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Jonathan R Terman
- Departments of Neuroscience and Pharmacology and Neuroscience Graduate Program, The University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Emil Reisler
- Department of Chemistry and Biochemistry, University of California-Los Angeles, Los Angeles, California 90095, USA.,Molecular Biology Institute, University of California-Los Angeles, Los Angeles, California 90095, USA
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