1
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Anbalagan GK, Agarwal P, Ghosh SK. Evidence of 14-3-3 proteins contributing to kinetochore integrity and chromosome congression during mitosis. J Cell Sci 2024; 137:jcs261928. [PMID: 38988319 DOI: 10.1242/jcs.261928] [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: 12/24/2023] [Accepted: 07/05/2024] [Indexed: 07/12/2024] Open
Abstract
The 14-3-3 family of proteins are conserved across eukaryotes and serve myriad important regulatory functions in the cell. Homo- and hetero-dimers of these proteins mainly recognize their ligands via conserved motifs to modulate the localization and functions of those effector ligands. In most of the genetic backgrounds of Saccharomyces cerevisiae, disruption of both 14-3-3 homologs (Bmh1 and Bmh2) are either lethal or cells survive with severe growth defects, including gross chromosomal missegregation and prolonged cell cycle arrest. To elucidate their contributions to chromosome segregation, in this work, we investigated their centromere- and kinetochore-related functions of Bmh1 and Bmh2. Analysis of appropriate deletion mutants shows that Bmh isoforms have cumulative and non-shared isoform-specific contributions in maintaining the proper integrity of the kinetochore ensemble. Consequently, Bmh mutant cells exhibited perturbations in kinetochore-microtubule (KT-MT) dynamics, characterized by kinetochore declustering, mis-localization of kinetochore proteins and Mad2-mediated transient G2/M arrest. These defects also caused an asynchronous chromosome congression in bmh mutants during metaphase. In summary, this report advances the knowledge on contributions of budding yeast 14-3-3 proteins in chromosome segregation by demonstrating their roles in kinetochore integrity and chromosome congression.
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Affiliation(s)
| | - Prakhar Agarwal
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, Powai, 400 076, India
| | - Santanu Kumar Ghosh
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Bombay, Powai, 400 076, India
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2
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Kapitonova AA, Perfilova KV, Cooley RB, Sluchanko NN. Phosphorylation Code of Human Nucleophosmin Includes Four Cryptic Sites for Hierarchical Binding of 14-3-3 Proteins. J Mol Biol 2024; 436:168592. [PMID: 38702038 DOI: 10.1016/j.jmb.2024.168592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/18/2024] [Accepted: 04/27/2024] [Indexed: 05/06/2024]
Abstract
Nucleophosmin (NPM1) is the 46th most abundant human protein with many functions whose dysregulation leads to various cancers. Pentameric NPM1 resides in the nucleolus but can also shuttle to the cytosol. NPM1 is regulated by multisite phosphorylation, yet molecular consequences of site-specific NPM1 phosphorylation remain elusive. Here we identify four 14-3-3 protein binding sites in NPM1 concealed within its oligomerization and α-helical C-terminal domains that are found phosphorylated in vivo. By combining mutagenesis, in-cell phosphorylation and PermaPhos technology for site-directed incorporation of a non-hydrolyzable phosphoserine mimic, we show how phosphorylation promotes NPM1 monomerization and partial unfolding, to recruit 14-3-3 dimers with low-micromolar affinity. Using fluorescence anisotropy we quantified pairwise interactions of all seven human 14-3-3 isoforms with four recombinant NPM1 phosphopeptides and assessed their druggability by fusicoccin. This revealed a complex hierarchy of 14-3-3 affinities toward the primary (S48, S293) and secondary (S106, S260) sites, differentially modulated by the small molecule. As three of these 14-3-3 binding phosphosites in NPM1 reside within signal sequences, this work suggests a mechanism of NPM1 regulation by which NPM1 phosphorylation can promote 14-3-3 binding to affect NPM1 shuttling between cell compartments. It also provides further evidence that phosphorylation-induced structural rearrangements of globular proteins serve to expose otherwise cryptic 14-3-3-binding sites that are important for cellular function.
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Affiliation(s)
- Anna A Kapitonova
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Kristina V Perfilova
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Richard B Cooley
- GCE4All Center, Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia.
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3
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Heesink G, van den Oetelaar MCM, Semerdzhiev SA, Ottmann C, Brunsveld L, Blum C, Claessens MMAE. 14-3-3τ as a Modulator of Early α-Synuclein Multimerization and Amyloid Formation. ACS Chem Neurosci 2024; 15:1926-1936. [PMID: 38635928 PMCID: PMC11066837 DOI: 10.1021/acschemneuro.4c00100] [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: 02/13/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/20/2024] Open
Abstract
The aggregation of α-synuclein (αS) plays a key role in Parkinson's disease (PD) etiology. While the onset of PD is age-related, the cellular quality control system appears to regulate αS aggregation throughout most human life. Intriguingly, the protein 14-3-3τ has been demonstrated to delay αS aggregation and the onset of PD in various models. However, the molecular mechanisms behind this delay remain elusive. Our study confirms the delay in αS aggregation by 14-3-3τ, unveiling a concentration-dependent relation. Utilizing microscale thermophoresis (MST) and single-molecule burst analysis, we quantified the early αS multimers and concluded that these multimers exhibit properties that classify them as nanoscale condensates that form in a cooperative process, preceding the critical nucleus for fibril formation. Significantly, the αS multimer formation mechanism changes dramatically in the presence of scaffold protein 14-3-3τ. Our data modeling suggests that 14-3-3τ modulates the multimerization process, leading to the creation of mixed multimers or co-condensates, comprising both αS and 14-3-3τ. These mixed multimers form in a noncooperative process. They are smaller, more numerous, and distinctively not on the pathway to amyloid formation. Importantly, 14-3-3τ thus acts in the very early stage of αS multimerization, ensuring that αS does not aggregate but remains soluble and functional. This offers long-sought novel entries for the pharmacological modulation of PD.
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Affiliation(s)
- Gobert Heesink
- Nanobiophysics,
Faculty of Science and Technology, MESA + Institute for Nanotechnology
and Technical Medical Centre, University
of Twente, Enschede 7500 AE, The Netherlands
| | - Maxime C. M. van den Oetelaar
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Slav A. Semerdzhiev
- Nanobiophysics,
Faculty of Science and Technology, MESA + Institute for Nanotechnology
and Technical Medical Centre, University
of Twente, Enschede 7500 AE, The Netherlands
| | - Christian Ottmann
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Luc Brunsveld
- Laboratory
of Chemical Biology, Department of Biomedical Engineering and Institute
for Complex Molecular Systems, Eindhoven
University of Technology, Eindhoven 5600 MB, The Netherlands
| | - Christian Blum
- Nanobiophysics,
Faculty of Science and Technology, MESA + Institute for Nanotechnology
and Technical Medical Centre, University
of Twente, Enschede 7500 AE, The Netherlands
| | - Mireille M. A. E. Claessens
- Nanobiophysics,
Faculty of Science and Technology, MESA + Institute for Nanotechnology
and Technical Medical Centre, University
of Twente, Enschede 7500 AE, The Netherlands
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4
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Khalil B, Da Cruz S. 14-3-3θ, a novel player in TDP-43 pathophysiology: Implications for ALS/FTD. Neuron 2024; 112:1197-1199. [PMID: 38636451 DOI: 10.1016/j.neuron.2024.03.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 03/25/2024] [Accepted: 03/25/2024] [Indexed: 04/20/2024]
Abstract
In this issue of Neuron, Ke et al.1 report a novel non-canonical interaction between 14-3-3θ and TDP-43 that impacts loss-of-function and gain-of-toxic pathology in TDP-43 proteinopathies. The authors further provide proof of principle for a 14-3-3θ-targeted gene therapy to reduce TDP-43-induced deficits in transgenic TDP-43 mutant mice.
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Affiliation(s)
- Bilal Khalil
- VIB-KU Leuven Center for Brain and Disease Research, Department of Neurosciences, KU Leuven, Leuven Brain Institute, Leuven, Belgium
| | - Sandrine Da Cruz
- VIB-KU Leuven Center for Brain and Disease Research, Department of Neurosciences, KU Leuven, Leuven Brain Institute, Leuven, Belgium.
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5
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Mukherjee S, Roy S, Mukherjee S, Harikishore A, Bhunia A, Mandal AK. 14-3-3 interaction with phosphodiesterase 8A sustains PKA signaling and downregulates the MAPK pathway. J Biol Chem 2024; 300:105725. [PMID: 38325743 PMCID: PMC10926215 DOI: 10.1016/j.jbc.2024.105725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 01/29/2024] [Indexed: 02/09/2024] Open
Abstract
The cAMP/PKA and mitogen-activated protein kinase (MAPK) signaling cascade control many cellular processes and are highly regulated for optimal cellular responses upon external stimuli. Phosphodiesterase 8A (PDE8A) is an important regulator that inhibits signaling via cAMP-dependent PKA by hydrolyzing intracellular cAMP pool. Conversely, PDE8A activates the MAPK pathway by protecting CRAF/Raf1 kinase from PKA-mediated inhibitory phosphorylation at Ser259 residue, a binding site of scaffold protein 14-3-3. It still remains enigmatic as to how the cross-talk involving PDE8A regulation influences cAMP/PKA and MAPK signaling pathways. Here, we report that PDE8A interacts with 14-3-3ζ in both yeast and mammalian system, and this interaction is enhanced upon the activation of PKA, which phosphorylates PDE8A's Ser359 residue. Biophysical characterization of phospho-Ser359 peptide with 14-3-3ζ protein further supports their interaction. Strikingly, 14-3-3ζ reduces the catalytic activity of PDE8A, which upregulates the cAMP/PKA pathway while the MAPK pathway is downregulated. Moreover, 14-3-3ζ in complex with PDE8A and cAMP-bound regulatory subunit of PKA, RIα, delays the deactivation of PKA signaling. Our results define 14-3-3ζ as a molecular switch that operates signaling between cAMP/PKA and MAPK by associating with PDE8A.
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Affiliation(s)
| | - Somesh Roy
- Department of Biological Sciences, Bose Institute, Kolkata, India
| | | | | | - Anirban Bhunia
- Department of Chemical Sciences, Bose Institute, Kolkata, India
| | - Atin K Mandal
- Department of Biological Sciences, Bose Institute, Kolkata, India.
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6
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Kapitonova AA, Perfilova KV, Cooley RB, Sluchanko NN. Phosphorylation code of human nucleophosmin includes four cryptic sites for hierarchical binding of 14-3-3 proteins. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.13.580064. [PMID: 38405961 PMCID: PMC10888825 DOI: 10.1101/2024.02.13.580064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Nucleophosmin (NPM1) is the 46th most abundant human protein with many functions whose dysregulation leads to various cancers. Pentameric NPM1 resides in the nucleolus but can also shuttle to the cytosol. NPM1 is regulated by multisite phosphorylation, yet molecular consequences of site-specific NPM1 phosphorylation remain elusive. Here we identify four 14-3-3 protein binding sites in NPM1 concealed within its oligomerization and α-helical C-terminal domains that are found phosphorylated in vivo. By combining mutagenesis, in-cell phosphorylation and PermaPhos technology for site-directed incorporation of a non-hydrolyzable phosphoserine mimic, we show how phosphorylation promotes NPM1 monomerization and partial unfolding, to recruit 14-3-3 dimers with low-micromolar affinity. Using fluorescence anisotropy we quantified pairwise interactions of all seven human 14-3-3 isoforms with four recombinant NPM1 phosphopeptides and assessed their druggability by fusicoccin. This revealed a complex hierarchy of 14-3-3 affinities toward the primary (S48, S293) and secondary (S106, S260) sites, differentially modulated by the small molecule. As three of these 14-3-3 binding phospho-sites in NPM1 reside within signal sequences, this work highlights a key mechanism of NPM1 regulation by which NPM1 phosphorylation promotes 14-3-3 binding to control nucleocytoplasmic shuttling. It also provides further evidence that phosphorylation-induced structural rearrangements of globular proteins serve to expose otherwise cryptic 14-3-3-binding sites that are important for cellular function.
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Affiliation(s)
- Anna A. Kapitonova
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Kristina V. Perfilova
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Richard B. Cooley
- GCE4All Center, Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR, 97331, USA
| | - Nikolai N. Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
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7
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Šulskis D, Žiaunys M, Sakalauskas A, Sniečkutė R, Smirnovas V. Formation of amyloid fibrils by the regulatory 14-3-3 ζ protein. Open Biol 2024; 14:230285. [PMID: 38228169 DOI: 10.1098/rsob.230285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 12/11/2023] [Indexed: 01/18/2024] Open
Abstract
The 14-3-3 proteins are a highly conserved adaptor protein family with multi-layer functions, abundantly expressed in the brain. The 14-3-3 proteins modulate phosphorylation, regulate enzymatic activity and can act as chaperones. Most importantly, they play an important role in various neurodegenerative disorders due to their vast interaction partners. Particularly, the 14-3-3ζ isoform is known to co-localize in aggregation tangles in both Alzheimer's and Parkinson's diseases as a result of protein-protein interactions. These abnormal clumps consist of amyloid fibrils, insoluble aggregates, mainly formed by the amyloid-β, tau and α-synuclein proteins. However, the molecular basis of if and how 14-3-3ζ can aggregate into amyloid fibrils is unknown. In this study, we describe the formation of amyloid fibrils by 14-3-3ζ using a comprehensive approach that combines bioinformatic tools, amyloid-specific dye binding, secondary structure analysis and atomic force microscopy. The results presented herein characterize the amyloidogenic properties of 14-3-3ζ and imply that the well-folded protein undergoes aggregation to β-sheet-rich amyloid fibrils.
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Affiliation(s)
- Darius Šulskis
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Mantas Žiaunys
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Andrius Sakalauskas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Rūta Sniečkutė
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Vytautas Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
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8
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Zhao Y, Sheldon M, Sun Y, Ma L. New Insights into YAP/TAZ-TEAD-Mediated Gene Regulation and Biological Processes in Cancer. Cancers (Basel) 2023; 15:5497. [PMID: 38067201 PMCID: PMC10705714 DOI: 10.3390/cancers15235497] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/07/2023] [Accepted: 11/17/2023] [Indexed: 02/12/2024] Open
Abstract
The Hippo pathway is conserved across species. Key mammalian Hippo pathway kinases, including MST1/2 and LATS1/2, inhibit cellular growth by inactivating the TEAD coactivators, YAP, and TAZ. Extensive research has illuminated the roles of Hippo signaling in cancer, development, and regeneration. Notably, dysregulation of Hippo pathway components not only contributes to tumor growth and metastasis, but also renders tumors resistant to therapies. This review delves into recent research on YAP/TAZ-TEAD-mediated gene regulation and biological processes in cancer. We focus on several key areas: newly identified molecular patterns of YAP/TAZ activation, emerging mechanisms that contribute to metastasis and cancer therapy resistance, unexpected roles in tumor suppression, and advances in therapeutic strategies targeting this pathway. Moreover, we provide an updated view of YAP/TAZ's biological functions, discuss ongoing controversies, and offer perspectives on specific debated topics in this rapidly evolving field.
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Affiliation(s)
- Yang Zhao
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (Y.Z.); (M.S.)
| | - Marisela Sheldon
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (Y.Z.); (M.S.)
| | - Yutong Sun
- Department of Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
| | - Li Ma
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; (Y.Z.); (M.S.)
- The University of Texas MD Anderson Cancer Center UTHealth Houston Graduate School of Biomedical Sciences, Houston, TX 77030, USA
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9
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Liu J, Zhao C, Xiao X, Li A, Liu Y, Zhao J, Fan L, Liang Z, Pang W, Yao W, Li W, Zhou J. Endothelial discoidin domain receptor 1 senses flow to modulate YAP activation. Nat Commun 2023; 14:6457. [PMID: 37833282 PMCID: PMC10576099 DOI: 10.1038/s41467-023-42341-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 10/06/2023] [Indexed: 10/15/2023] Open
Abstract
Mechanotransduction in endothelial cells is critical to maintain vascular homeostasis and can contribute to disease development, yet the molecules responsible for sensing flow remain largely unknown. Here, we demonstrate that the discoidin domain receptor 1 (DDR1) tyrosine kinase is a direct mechanosensor and is essential for connecting the force imposed by shear to the endothelial responses. We identify the flow-induced activation of endothelial DDR1 to be atherogenic. Shear force likely causes conformational changes of DDR1 ectodomain by unfolding its DS-like domain to expose the buried cysteine-287, whose exposure facilitates force-induced receptor oligomerization and phase separation. Upon shearing, DDR1 forms liquid-like biomolecular condensates and co-condenses with YWHAE, leading to nuclear translocation of YAP. Our findings establish a previously uncharacterized role of DDR1 in directly sensing flow, propose a conceptual framework for understanding upstream regulation of the YAP signaling, and offer a mechanism by which endothelial activation of DDR1 promotes atherosclerosis.
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Affiliation(s)
- Jiayu Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China
| | - Chuanrong Zhao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China
| | - Xue Xiao
- National Laboratory of Biomacromolecules and Key Laboratory of Epigenetic Regulation and Intervention, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Aohan Li
- National Laboratory for Condensed Matter Physics and Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yueqi Liu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China
| | - Jianan Zhao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China
| | - Linwei Fan
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China
| | - Zhenhui Liang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China
| | - Wei Pang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
| | - Weijuan Yao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
| | - Wei Li
- National Laboratory of Biomacromolecules and Key Laboratory of Epigenetic Regulation and Intervention, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Jing Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, State Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China.
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University, Beijing, 100191, China.
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10
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Tame J, Berliner L, Shaitan K, Hall D. Editors' roundup: April 2023. Biophys Rev 2023; 15:157-160. [PMID: 37113564 PMCID: PMC10091333 DOI: 10.1007/s12551-023-01060-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/22/2023] [Indexed: 04/29/2023] Open
Abstract
The IUPAB Biophysical Reviews journal provides a regular forum, known as the "Editors' Roundup," that is available to editorial board members of any biophysics-related journal to contribute a personal recommendation of articles appearing within their publications. This latest Issue of the Editors' Roundup carries recommendations from editorial board members associated with the following journals, Cell Biochemistry and Biophysics, Biophysics, and the Biophysical Reviews journal.
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Affiliation(s)
- Jeremy Tame
- Graduate School of Medical Life Science, Yokohama City University, Yokohama, Japan
| | - Lawrence Berliner
- Department of Chemistry and Biochemistry, University of Denver, Denver, USA
| | | | - Damien Hall
- WPI Nano Life Science Institute, Kanazawa University, Kakumamachi, Kanazawa, Ishikawa, Kanazawa, 920-1164 Japan
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11
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Konietzny A, Wegmann S, Mikhaylova M. The endoplasmic reticulum puts a new spin on synaptic tagging. Trends Neurosci 2023; 46:32-44. [PMID: 36428191 DOI: 10.1016/j.tins.2022.10.012] [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: 08/18/2022] [Revised: 10/12/2022] [Accepted: 10/31/2022] [Indexed: 11/23/2022]
Abstract
The heterogeneity of the endoplasmic reticulum (ER) makes it a versatile platform for a broad range of homeostatic processes, ranging from calcium regulation to synthesis and trafficking of proteins and lipids. It is not surprising that neurons use this organelle to fine-tune synaptic properties and thereby provide specificity to synaptic inputs. In this review, we discuss the mechanisms that enable activity-dependent ER recruitment into dendritic spines, with a focus on molecular mechanisms that mediate transport and retention of the ER in spines. The role of calcium signaling in spine ER, synaptopodin 'tagging' of active synapses, and the formation of the spine apparatus (SA) are highlighted. Finally, we discuss the role of liquid-liquid phase separation as a possible driving force in these processes.
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Affiliation(s)
- Anja Konietzny
- AG Optobiology, Institute of Biology, Humboldt Universität zu Berlin, Berlin, Germany; Guest Group 'Neuronal Protein Transport', Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Susanne Wegmann
- German Center for Neurodegenerative Diseases (DZNE), Berlin, Germany
| | - Marina Mikhaylova
- AG Optobiology, Institute of Biology, Humboldt Universität zu Berlin, Berlin, Germany; Guest Group 'Neuronal Protein Transport', Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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12
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Li H, Ernst C, Kolonko-Adamska M, Greb-Markiewicz B, Man J, Parissi V, Ng BWL. Phase separation in viral infections. Trends Microbiol 2022; 30:1217-1231. [PMID: 35902318 DOI: 10.1016/j.tim.2022.06.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 06/24/2022] [Accepted: 06/27/2022] [Indexed: 01/13/2023]
Abstract
Viruses rely on the reprogramming of cellular processes to enable efficient viral replication; this often requires subcompartmentalization within the host cell. Liquid-liquid phase separation (LLPS) has emerged as a fundamental principle to organize and subdivide cellular processes, and plays an important role in viral life cycles. Despite substantial advances in the field, elucidating the exact organization and function of these organelles remains a major challenge. In this review, we summarize the biochemical basis of condensate formation, the role of LLPS during viral infection, and interplay of LLPS with innate immune responses. Finally, we discuss possible strategies and molecules to modulate LLPS during viral infections.
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Affiliation(s)
- Haohua Li
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC, Canada
| | - Christina Ernst
- School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Marta Kolonko-Adamska
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Beata Greb-Markiewicz
- Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Jackie Man
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Faculty of Medicine, Imperial College, London, UK
| | - Vincent Parissi
- Microbiologie Fondamentale et Pathogénicité Laboratory (MPF), UMR 5234, « Mobility of pathogenic genomes and chromatin dynamics » team (MobilVIR), CNRS-University of Bordeaux, Bordeaux, France
| | - Billy Wai-Lung Ng
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong.
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DiRusso CJ, Dashtiahangar M, Gilmore TD. Scaffold proteins as dynamic integrators of biological processes. J Biol Chem 2022; 298:102628. [PMID: 36273588 PMCID: PMC9672449 DOI: 10.1016/j.jbc.2022.102628] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/14/2022] [Accepted: 10/15/2022] [Indexed: 11/15/2022] Open
Abstract
Scaffold proteins act as molecular hubs for the docking of multiple proteins to organize efficient functional units for signaling cascades. Over 300 human proteins have been characterized as scaffolds, acting in a variety of signaling pathways. While the term scaffold implies a static, supportive platform, it is now clear that scaffolds are not simply inert docking stations but can undergo conformational changes that affect their dependent signaling pathways. In this review, we catalog scaffold proteins that have been shown to undergo actionable conformational changes, with a focus on the role that conformational change plays in the activity of the classic yeast scaffold STE5, as well as three human scaffold proteins (KSR, NEMO, SHANK3) that are integral to well-known signaling pathways (RAS, NF-κB, postsynaptic density). We also discuss scaffold protein conformational changes vis-à-vis liquid-liquid phase separation. Changes in scaffold structure have also been implicated in human disease, and we discuss how aberrant conformational changes may be involved in disease-related dysregulation of scaffold and signaling functions. Finally, we discuss how understanding these conformational dynamics will provide insight into the flexibility of signaling cascades and may enhance our ability to treat scaffold-associated diseases.
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Han Y, Ye H, Li P, Zeng Y, Yang J, Gao M, Su Z, Huang Y. In vitro characterization and molecular dynamics simulation reveal mechanism of 14-3-3ζ regulated phase separation of the tau protein. Int J Biol Macromol 2022; 208:1072-1081. [PMID: 35381286 DOI: 10.1016/j.ijbiomac.2022.03.215] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/10/2022] [Accepted: 03/31/2022] [Indexed: 11/29/2022]
Abstract
As a major microtubule-associated protein, tau is involved in the assembly of microtubules in the central nervous system. However, under pathological conditions tau assembles into amyloid filaments. Liquid droplets formed by liquid-liquid phase separation (LLPS) are a recently identified assembly state of tau and may have a major effect on the physiological function of tau and the formation of tau aggregates. 14-3-3 proteins are ubiquitously expressed in various tissues and regulate a wide variety of biological processes. In this work, we demonstrate that 14-3-3ζ is recruited into tau droplets and regulates tau LLPS by in vitro assays. While the mobility of tau molecules inside the droplets is not affected in the presence of 14-3-3ζ, the amount and size of droplets can vary significantly. Mechanistic studies reveal that 14-3-3ζ regulates tau LLPS by electrostatic interactions and hydrophobic interactions with the proline-rich domain and the microtubule-binding domain of tau. Surprisingly, the disordered C-terminal tail rather than the amphipathic binding groove of 14-3-3ζ plays a key role. Our findings not only provide a novel dimension to understand the interactions between 14 and 3-3 proteins and tau, but also suggest that 14-3-3 proteins may play an important role in regulating the LLPS of their binding partners.
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Affiliation(s)
- Yue Han
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Haiqiong Ye
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Ping Li
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yifan Zeng
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Jing Yang
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Meng Gao
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China.
| | - Zhengding Su
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China
| | - Yongqi Huang
- Key Laboratory of Industrial Fermentation (Ministry of Education), Hubei University of Technology, Wuhan 430068, China; Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan 430068, China; Department of Biological Engineering, Hubei University of Technology, Wuhan 430068, China.
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