1
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Aono Y, Nakajima T, Ichimiya W, Yoshida M, Sato M. Highly Efficient Fluorescent Probe to Visualize Protein Interactions at the Superresolution. ACS Chem Biol 2024; 19:1271-1279. [PMID: 38835147 DOI: 10.1021/acschembio.4c00075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Superresolution microscopy (SR microscopy) of protein-protein interactions (PPIs) occurring in subcellular structures is essential for understanding cellular functions. However, a powerful and useful technology for SR microscopy of PPIs remains elusive. Here, we develop a highly efficient photoconvertible fluorescent probe, named split-Dendra2, for SR microscopy of PPIs in the cell. We found that split-Dendra2 enables a highly efficient detection of PPIs, making it possible to perform SR microscopy of PPIs with high spatial resolution and high image reconstruction fidelity. We demonstrate the utility of split-Dendra2 by visualizing PPIs occurring in small subcellular structures at the superresolution, such as clathrin-coated pits and focal adhesions, which cannot be visualized by the existing tools. Split-Dendra2 offers a powerful and useful tool that greatly expands the possibility of SR microscopy and can contribute to revealing the function of PPIs at the nanoscale resolution.
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Affiliation(s)
- Yuki Aono
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
| | - Takahiro Nakajima
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
- Kanagawa Institute of Industrial Science and Technology, Kanagawa 243-0435, Japan
| | - Wataru Ichimiya
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
| | - Mayumi Yoshida
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
| | - Moritoshi Sato
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
- Kanagawa Institute of Industrial Science and Technology, Kanagawa 243-0435, Japan
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2
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Lawrence EJ, Chatterjee S, Zanic M. More is different: Reconstituting complexity in microtubule regulation. J Biol Chem 2023; 299:105398. [PMID: 37898404 PMCID: PMC10694663 DOI: 10.1016/j.jbc.2023.105398] [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: 06/11/2023] [Revised: 10/13/2023] [Accepted: 10/18/2023] [Indexed: 10/30/2023] Open
Abstract
Microtubules are dynamic cytoskeletal filaments that undergo stochastic switching between phases of polymerization and depolymerization-a behavior known as dynamic instability. Many important cellular processes, including cell motility, chromosome segregation, and intracellular transport, require complex spatiotemporal regulation of microtubule dynamics. This coordinated regulation is achieved through the interactions of numerous microtubule-associated proteins (MAPs) with microtubule ends and lattices. Here, we review the recent advances in our understanding of microtubule regulation, focusing on results arising from biochemical in vitro reconstitution approaches using purified multiprotein ensembles. We discuss how the combinatory effects of MAPs affect both the dynamics of individual microtubule ends, as well as the stability and turnover of the microtubule lattice. In addition, we highlight new results demonstrating the roles of protein condensates in microtubule regulation. Our overall intent is to showcase how lessons learned from reconstitution approaches help unravel the regulatory mechanisms at play in complex cellular environments.
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Affiliation(s)
- Elizabeth J Lawrence
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Saptarshi Chatterjee
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Marija Zanic
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, USA; Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee, USA; Department of Biochemistry, Vanderbilt University, Nashville, Tennessee, USA.
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3
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Yu Q, Liu X, Fang J, Wu H, Guo C, Zhang W, Liu N, Jiang C, Sha Q, Yuan X, Wang Z, Qu K. Dynamics and regulation of mitotic chromatin accessibility bookmarking at single-cell resolution. SCIENCE ADVANCES 2023; 9:eadd2175. [PMID: 36696508 PMCID: PMC9876548 DOI: 10.1126/sciadv.add2175] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 12/29/2022] [Indexed: 06/17/2023]
Abstract
Although mitotic chromosomes are highly compacted and transcriptionally inert, some active chromatin features are retained during mitosis to ensure the proper postmitotic reestablishment of maternal transcriptional programs, a phenomenon termed "mitotic bookmarking." However, the dynamics and regulation of mitotic bookmarking have not been systemically surveyed. Using single-cell transposase-accessible chromatin sequencing (scATAC-seq), we examined 6538 mitotic L02 human liver cells of variable stages and found that chromatin accessibility remained changing throughout cell division, with a constant decrease until metaphase and a gradual increase as chromosomes segregated. In particular, a subset of chromatin regions were identified to remain open throughout mitosis, and genes associated with these bookmarked regions are primarily linked to rapid reactivation upon mitotic exit. We also demonstrated that nuclear transcription factor Y subunit α (NF-YA) preferentially occupied bookmarked regions and contributed to transcriptional reactivation after mitosis. Our study uncovers the dynamic and regulatory blueprint of mitotic bookmarking.
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Affiliation(s)
- Qiaoni Yu
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
- Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei 230088, China
- Department of Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230021, China
| | - Xu Liu
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
- Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Jingwen Fang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
- HanGene Biotech, Xiaoshan Innovation Polis, Hangzhou, Zhejiang 311200, China
| | - Huihui Wu
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
- Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Chuang Guo
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Wen Zhang
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Nianping Liu
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Chen Jiang
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Qing Sha
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Xiao Yuan
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
- Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Zhikai Wang
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
- Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Kun Qu
- MOE Key Laboratory for Cellular Dynamics, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, China
- Institute of Artificial Intelligence, Hefei Comprehensive National Science Center, Hefei 230088, China
- Department of Oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230021, China
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
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4
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Song X, Yang F, Yang T, Wang Y, Ding M, Li L, Xu P, Liu S, Dai M, Chi C, Xiang S, Xu C, Li D, Wang Z, Li L, Hill DL, Fu C, Yuan K, Li P, Zang J, Hou Z, Jiang K, Shi Y, Liu X, Yao X. Phase separation of EB1 guides microtubule plus-end dynamics. Nat Cell Biol 2023; 25:79-91. [PMID: 36536176 DOI: 10.1038/s41556-022-01033-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 10/21/2022] [Indexed: 12/24/2022]
Abstract
In eukaryotes, end-binding (EB) proteins serve as a hub for orchestrating microtubule dynamics and are essential for cellular dynamics and organelle movements. EB proteins modulate structural transitions at growing microtubule ends by recognizing and promoting an intermediate state generated during GTP hydrolysis. However, the molecular mechanisms and physiochemical properties of the EB1 interaction network remain elusive. Here we show that EB1 formed molecular condensates through liquid-liquid phase separation (LLPS) to constitute the microtubule plus-end machinery. EB1 LLPS is driven by multivalent interactions among different segments, which are modulated by charged residues in the linker region. Phase-separated EB1 provided a compartment for enriching tubulin dimers and other plus-end tracking proteins. Real-time imaging of chromosome segregation in HeLa cells expressing LLPS-deficient EB1 mutants revealed the importance of EB1 LLPS dynamics in mitotic chromosome movements. These findings demonstrate that EB1 forms a distinct physical and biochemical membraneless-organelle via multivalent interactions that guide microtubule dynamics.
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Affiliation(s)
- Xiaoyu Song
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China.,Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Fengrui Yang
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China.,Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Tongtong Yang
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Yong Wang
- Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Mingrui Ding
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China.,Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Linge Li
- Anhui Key Laboratory for Chemical Biology & Hefei National Center for Cross-disciplinary Sciences, Hefei, China
| | - Panpan Xu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Shuaiyu Liu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China.,Anhui Key Laboratory for Chemical Biology & Hefei National Center for Cross-disciplinary Sciences, Hefei, China
| | - Ming Dai
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Changbiao Chi
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Shengqi Xiang
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Chao Xu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Dong Li
- Institute of Biophysics, Beijing, China
| | - Zhikai Wang
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China.,Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA
| | - Lin Li
- CAS Center of Excellence in Molecular Cell Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Donald L Hill
- Department of Pathology, University of Alabama, Birmingham, AL, USA
| | - Chuanhai Fu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Kai Yuan
- Hunan Key Laboratory of Molecular Precision Medicine, Central South University School of Life Sciences, Changsha, China
| | - Pilong Li
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Jianye Zang
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Zhonghuai Hou
- Anhui Key Laboratory for Chemical Biology & Hefei National Center for Cross-disciplinary Sciences, Hefei, China
| | - Kai Jiang
- Frontier Science Center for Immunology and Metabolism, Medical Research Institute, Wuhan University, Wuhan, China
| | - Yunyu Shi
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China
| | - Xing Liu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China. .,Keck Center for Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA, USA.
| | - Xuebiao Yao
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, Hefei National Center for Cross-disciplinary Sciences, University of Science & Technology of China School of Life Sciences, Hefei, China.
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5
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Sedzro DM, Yuan X, Mullen M, Ejaz U, Yang T, Liu X, Song X, Tang YC, Pan W, Zou P, Gao X, Wang D, Wang Z, Dou Z, Liu X, Yao X. Phosphorylation of CENP-R by Aurora B regulates kinetochore-microtubule attachment for accurate chromosome segregation. J Mol Cell Biol 2022; 14:6693714. [PMID: 36069839 PMCID: PMC9802239 DOI: 10.1093/jmcb/mjac051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 06/14/2022] [Accepted: 09/01/2022] [Indexed: 01/14/2023] Open
Abstract
Error-free mitosis depends on accurate chromosome attachment to spindle microtubules via a fine structure called the centromere that is epigenetically specified by the enrichment of CENP-A nucleosomes. Centromere maintenance during mitosis requires CENP-A-mediated deposition of constitutive centromere-associated network that establishes the inner kinetochore and connects centromeric chromatin to spindle microtubules during mitosis. Although previously proposed to be an adaptor of retinoic acid receptor, here, we show that CENP-R synergizes with CENP-OPQU to regulate kinetochore-microtubule attachment stability and ensure accurate chromosome segregation in mitosis. We found that a phospho-mimicking mutation of CENP-R weakened its localization to the kinetochore, suggesting that phosphorylation may regulate its localization. Perturbation of CENP-R phosphorylation is shown to prevent proper kinetochore-microtubule attachment at metaphase. Mechanistically, CENP-R phosphorylation disrupts its binding with CENP-U. Thus, we speculate that Aurora B-mediated CENP-R phosphorylation promotes the correction of improper kinetochore-microtubule attachment in mitosis. As CENP-R is absent from yeast, we reasoned that metazoan evolved an elaborate chromosome stability control machinery to ensure faithful chromosome segregation in mitosis.
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Affiliation(s)
- Divine Mensah Sedzro
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China
| | - Xiao Yuan
- Correspondence to: Xiao Yuan, E-mail:
| | - McKay Mullen
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China,Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Umer Ejaz
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China
| | - Tongtong Yang
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China
| | - Xu Liu
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China,Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Xiaoyu Song
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China,Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Yun-Chi Tang
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences (CAS), Shanghai 200031, China
| | - Weijun Pan
- Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences (CAS), Shanghai 200031, China
| | - Peng Zou
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xinjiao Gao
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China
| | - Dongmei Wang
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China
| | - Zhikai Wang
- MOE Key Laboratory for Cellular Dynamics, University of Science and Technology of China School of Life Sciences, Hefei 230027, China,Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, National Center for Cross-Disciplinary Sciences & CAS Center for Excellence in Molecular Cell Science, Hefei 230026, China,Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Zhen Dou
- Correspondence to: Zhen Dou, E-mail:
| | - Xing Liu
- Correspondence to: Xing Liu, E-mail:
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6
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MAPRE2 regulates the first meiotic progression in mouse oocytes. Exp Cell Res 2022; 416:113135. [DOI: 10.1016/j.yexcr.2022.113135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/30/2022] [Accepted: 04/01/2022] [Indexed: 11/22/2022]
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7
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Dynamic crotonylation of EB1 by TIP60 ensures accurate spindle positioning in mitosis. Nat Chem Biol 2021; 17:1314-1323. [PMID: 34608293 DOI: 10.1038/s41589-021-00875-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 08/04/2021] [Indexed: 02/08/2023]
Abstract
Spindle position control is essential for cell fate determination and organogenesis. Early studies indicate the essential role of the evolutionarily conserved Gαi/LGN/NuMA network in spindle positioning. However, the regulatory mechanisms that couple astral microtubules dynamics to the spindle orientation remain elusive. Here we delineated a new mitosis-specific crotonylation-regulated astral microtubule-EB1-NuMA interaction in mitosis. EB1 is a substrate of TIP60, and TIP60-dependent crotonylation of EB1 tunes accurate spindle positioning in mitosis. Mechanistically, TIP60 crotonylation of EB1 at Lys66 forms a dynamic link between accurate attachment of astral microtubules to the lateral cell cortex defined by NuMA-LGN and fine tune of spindle positioning. Real-time imaging of chromosome movements in HeLa cells expressing genetically encoded crotonylated EB1 revealed the importance of crotonylation dynamics for accurate control of spindle orientation during metaphase-anaphase transition. These findings delineate a general signaling cascade that integrates protein crotonylation with accurate spindle positioning for chromosome stability in mitosis.
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8
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Huang YT, Hsu YT, Chen YF, Shen MR. Super-Resolution Microscopy Reveals That Stromal Interaction Molecule 1 Trafficking Depends on Microtubule Dynamics. Front Physiol 2021; 12:762387. [PMID: 34803742 PMCID: PMC8602801 DOI: 10.3389/fphys.2021.762387] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/18/2021] [Indexed: 12/23/2022] Open
Abstract
Store-operated Ca2+ entry (SOCE) is an essential pathway for Ca2+ signaling, and regulates various vital cellular functions. It is triggered by the endoplasmic reticulum Ca2+ sensor stromal interaction molecule 1 (STIM1). Illustration of STIM1 spatiotemporal structure at the nanometer scale during SOCE activation provides structural and functional insights into the fundamental Ca2+ homeostasis. In this study, we used direct stochastic optical reconstruction microscopy (dSTORM) to revisit the dynamic process of the interaction between STIM1, end-binding protein (EB), and microtubules to the ER-plasma membrane. Using dSTORM, we found that“powder-like”STIM1 aggregates into “trabecular-like” architectures toward the cell periphery during SOCE, and that an intact microtubule network and EB1 are essential for STIM1 trafficking. After thapsigargin treatment, STIM1 can interact with EB1 regardless of undergoing aggregation. We generated STIM1 variants adapted from a real-world database and introduced them into SiHa cells to clarify the impact of STIM1 mutations on cancer cell behavior. The p.D76G and p.D84Y variants locating on the Ca2+ binding domain of STIM1 result in inhibition of focal adhesion turnover, Ca2+ influx during SOCE and subsequent cell migration. Inversely, the p.R643C variant on the microtubule interacting domain of STIM1 leads to dissimilar consequence and aggravates cell migration. These findings imply that STIM1 mutational patterns have an impact on cancer metastasis, and therefore could be either a prognostic marker or a novel therapeutic target to inhibit the malignant behavior of STIM1-mediated cancer cells. Altogether, we generated novel insight into the role of STIM1 during SOCE activation, and uncovered the impact of real-world STIM1 variants on cancer cells.
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Affiliation(s)
- Yi-Ting Huang
- Department of Pharmacology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Basic Medical Sciences, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ya-Ting Hsu
- Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Division of Hematology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yih-Fung Chen
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Meng-Ru Shen
- Department of Pharmacology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Obstetrics and Gynecology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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9
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Gui P, Sedzro DM, Yuan X, Liu S, Hei M, Tian W, Zohbi N, Wang F, Yao Y, Aikhionbare FO, Gao X, Wang D, Yao X, Dou Z. Mps1 dimerization and multisite interactions with Ndc80 complex enable responsive spindle assembly checkpoint signaling. J Mol Cell Biol 2021; 12:486-498. [PMID: 32219319 PMCID: PMC7493027 DOI: 10.1093/jmcb/mjaa006] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/13/2020] [Accepted: 03/18/2020] [Indexed: 12/21/2022] Open
Abstract
Error-free mitosis depends on accurate chromosome attachment to spindle microtubules, which is monitored by the spindle assembly checkpoint (SAC) signaling. As an upstream factor of SAC, the precise and dynamic kinetochore localization of Mps1 kinase is critical for initiating and silencing SAC signaling. However, the underlying molecular mechanism remains elusive. Here, we demonstrated that the multisite interactions between Mps1 and Ndc80 complex (Ndc80C) govern Mps1 kinetochore targeting. Importantly, we identified direct interaction between Mps1 tetratricopeptide repeat domain and Ndc80C. We further identified that Mps1 C-terminal fragment, which contains the protein kinase domain and C-tail, enhances Mps1 kinetochore localization. Mechanistically, Mps1 C-terminal fragment mediates its dimerization. Perturbation of C-tail attenuates the kinetochore targeting and activity of Mps1, leading to aberrant mitosis due to compromised SAC function. Taken together, our study highlights the importance of Mps1 dimerization and multisite interactions with Ndc80C in enabling responsive SAC signaling.
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Affiliation(s)
- Ping Gui
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China.,Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Divine M Sedzro
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Xiao Yuan
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Sikai Liu
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Mohan Hei
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wei Tian
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Najdat Zohbi
- Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Fangwei Wang
- Life Sciences Institute and Innovation Center for Cell Signaling Network, Zhejiang University, Hangzhou 310058, China
| | - Yihan Yao
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Felix O Aikhionbare
- Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Xinjiao Gao
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Dongmei Wang
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Xuebiao Yao
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Zhen Dou
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
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10
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Wang X, Wang W, Wang X, Wang M, Zhu L, Garba F, Fu C, Zieger B, Liu X, Liu X, Yao X. The septin complex links the catenin complex to the actin cytoskeleton for establishing epithelial cell polarity. J Mol Cell Biol 2021; 13:395-408. [PMID: 34143183 PMCID: PMC8436676 DOI: 10.1093/jmcb/mjab036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 03/16/2021] [Accepted: 03/23/2021] [Indexed: 11/13/2022] Open
Abstract
Cell polarity is essential for spatially regulating of physiological processes in metazoans by which hormonal stimulation‒secretion coupling is precisely coupled for tissue homeostasis and organ communications. However, the molecular mechanisms underlying epithelial cell polarity establishment remain elusive. Here, we show that septin cytoskeleton interacts with catenin complex to organize a functional domain to separate apical from basal membranes in polarized epithelial cells. Using polarized epithelial cell monolayer as a model system with transepithelial electrical resistance as functional readout, our studies show that septins are essential for epithelial cell polarization. Our proteomic analyses discovered a novel septin‒catenin complex during epithelial cell polarization. The functional relevance of septin‒catenin complex was then examined in three-dimensional (3D) culture in which suppression of septins resulted in deformation of apical lumen in cysts, a hallmark seen in polarity-deficient 3D cultures and animals. Mechanistically, septin cytoskeleton stabilizes the association of adherens catenin complex with actin cytoskeleton, and depletion or disruption of septin cytoskeleton liberates adherens junction and polarity complexes into the cytoplasm. Together, these findings reveal a previously unrecognized role for septin cytoskeleton in the polarization of the apical‒basal axis and lumen formation in polarized epithelial cells.
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Affiliation(s)
- Xueying Wang
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Keck Center for Organoids Plasticity Control, Atlanta, GA 30310, USA
| | - Wenwen Wang
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology and CAS Center for Excellence in Molecular Cell Science, Hefei 230027, China.,Keck Center for Organoids Plasticity Control, Atlanta, GA 30310, USA
| | - Xiwei Wang
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Keck Center for Organoids Plasticity Control, Atlanta, GA 30310, USA
| | - Ming Wang
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China
| | - Lijuan Zhu
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology and CAS Center for Excellence in Molecular Cell Science, Hefei 230027, China
| | - Fatima Garba
- Keck Center for Organoids Plasticity Control, Atlanta, GA 30310, USA
| | - Chuanhai Fu
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology and CAS Center for Excellence in Molecular Cell Science, Hefei 230027, China
| | - Barbara Zieger
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Hematology and Oncology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Xu Liu
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Keck Center for Organoids Plasticity Control, Atlanta, GA 30310, USA
| | - Xing Liu
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology and CAS Center for Excellence in Molecular Cell Science, Hefei 230027, China
| | - Xuebiao Yao
- MOE Key Laboratory for Membraneless Organelles & Cellular Dynamics and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230027, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology and CAS Center for Excellence in Molecular Cell Science, Hefei 230027, China
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11
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Ayyappan S, Dharan PS, Krishnan A, Marira RR, Lambert M, Manna TK, Vijayan V. SxIP binding disrupts the constitutive homodimer interface of EB1 and stabilizes EB1 monomer. Biophys J 2021; 120:2019-2029. [PMID: 33737159 DOI: 10.1016/j.bpj.2021.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/16/2021] [Accepted: 03/01/2021] [Indexed: 11/16/2022] Open
Abstract
SxIP is a microtubule tip localizing signal found in many +TIP proteins that bind to the hydrophobic cavity of the C-terminal domain of end binding protein 1 (EB1) and then positively regulate the microtubule plus-end tracking of EBs. However, the exact mechanism of microtubule activation of EBs in the presence of SxIP signaling motif is not known. Here, we studied the effect of SxIP peptide on the native conformation of EB1 in solution. Using various NMR experiments, we found that SxIP peptide promoted the dissociation of natively formed EB1 dimer. We also discovered that I224A mutation of EB1 resulted in an unfolded C-terminal domain, which upon binding with the SxIP motif folded to its native structure. Molecular dynamics simulations also confirmed the relative structural stability of EB1 monomer in the SxIP bound state. Residual dipolar couplings and heteronuclear NOE analysis suggested that the binding of SxIP peptide at the C-terminal domain of EB1 decreased the dynamics and conformational flexibility of the N-terminal domain involved in EB1-microtubule interaction. The SxIP-induced disruption of the dimeric interactions in EB1, coupled with the reduction in conformational flexibility of the N-terminal domain of EB1, might facilitate the microtubule association of EB1.
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Affiliation(s)
- Shine Ayyappan
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India
| | - Pooja S Dharan
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India
| | - Arya Krishnan
- School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India
| | - Renjith R Marira
- School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India
| | - Mahil Lambert
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India
| | - Tapas K Manna
- School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India
| | - Vinesh Vijayan
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram, Kerala, India.
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12
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Zhou X, Mehta S, Zhang J. Genetically Encodable Fluorescent and Bioluminescent Biosensors Light Up Signaling Networks. Trends Biochem Sci 2020; 45:889-905. [PMID: 32660810 PMCID: PMC7502535 DOI: 10.1016/j.tibs.2020.06.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 05/25/2020] [Accepted: 06/01/2020] [Indexed: 12/12/2022]
Abstract
Cell signaling networks are intricately regulated in time and space to determine the responses and fates of cells to different cues. Genetically encodable fluorescent and bioluminescent biosensors enable the direct visualization of these spatiotemporal signaling dynamics within the native biological context, and have therefore become powerful molecular tools whose unique benefits are being used to address challenging biological questions. We first review the basis of biosensor design and remark on recent technologies that are accelerating biosensor development. We then discuss a few of the latest advances in the development and application of genetically encodable fluorescent and bioluminescent biosensors that have led to scientific or technological breakthroughs.
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Affiliation(s)
- Xin Zhou
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
| | - Sohum Mehta
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
| | - Jin Zhang
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA.
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13
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Liu X, Liu X, Wang H, Dou Z, Ruan K, Hill DL, Li L, Shi Y, Yao X. Phase separation drives decision making in cell division. J Biol Chem 2020; 295:13419-13431. [PMID: 32699013 DOI: 10.1074/jbc.rev120.011746] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 07/22/2020] [Indexed: 12/11/2022] Open
Abstract
Liquid-liquid phase separation (LLPS) of biomolecules drives the formation of subcellular compartments with distinct physicochemical properties. These compartments, free of lipid bilayers and therefore called membraneless organelles, include nucleoli, centrosomes, heterochromatin, and centromeres. These have emerged as a new paradigm to account for subcellular organization and cell fate decisions. Here we summarize recent studies linking LLPS to mitotic spindle, heterochromatin, and centromere assembly and their plasticity controls in the context of the cell division cycle, highlighting a functional role for phase behavior and material properties of proteins assembled onto heterochromatin, centromeres, and central spindles via LLPS. The techniques and tools for visualizing and harnessing membraneless organelle dynamics and plasticity in mitosis are also discussed, as is the potential for these discoveries to promote new research directions for investigating chromosome dynamics, plasticity, and interchromosome interactions in the decision-making process during mitosis.
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Affiliation(s)
- Xing Liu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China; Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - Xu Liu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China; Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, Georgia, USA
| | - Haowei Wang
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China
| | - Zhen Dou
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China
| | - Ke Ruan
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China
| | - Donald L Hill
- Comprehensive Cancer Center, University of Alabama, Birmingham, Alabama, USA
| | - Lin Li
- CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Shanghai, China
| | - Yunyu Shi
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China
| | - Xuebiao Yao
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics and CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China School of Life Science, Hefei, China; Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Center for Physical Sciences at Nanoscale, Hefei, China; Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, Georgia, USA; Comprehensive Cancer Center, University of Alabama, Birmingham, Alabama, USA; CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Shanghai, China.
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14
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Yu R, Wu H, Ismail H, Du S, Cao J, Wang J, Ward T, Yang F, Gui P, Ali M, Chu L, Mo F, Wang Q, Chu Y, Zang J, Zhao Y, Ye M, Fang G, Chen PR, Dou Z, Gao X, Wang W, Liu X, Yao X. Methylation of PLK1 by SET7/9 ensures accurate kinetochore-microtubule dynamics. J Mol Cell Biol 2020; 12:462-476. [PMID: 31863092 PMCID: PMC7333475 DOI: 10.1093/jmcb/mjz107] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/05/2019] [Accepted: 11/11/2019] [Indexed: 01/10/2023] Open
Abstract
Faithful segregation of mitotic chromosomes requires bi-orientation of sister chromatids, which relies on the sensing of correct attachments between spindle microtubules and kinetochores. Although the mechanisms underlying PLK1 activation have been extensively studied, the regulatory mechanisms that couple PLK1 activity to accurate chromosome segregation are not well understood. In particular, PLK1 is implicated in stabilizing kinetochore-microtubule attachments, but how kinetochore PLK1 activity is regulated to avoid hyperstabilized kinetochore-microtubules in mitosis remains elusive. Here, we show that kinetochore PLK1 kinase activity is modulated by SET7/9 via lysine methylation during early mitosis. The SET7/9-elicited dimethylation occurs at the Lys191 of PLK1, which tunes down its activity by limiting ATP utilization. Overexpression of the non-methylatable PLK1 mutant or chemical inhibition of SET7/9 methyltransferase activity resulted in mitotic arrest due to destabilized kinetochore-microtubule attachments. These data suggest that kinetochore PLK1 is essential for stable kinetochore-microtubule attachments and methylation by SET7/9 promotes dynamic kinetochore-microtubule attachments for accurate error correction. Our findings define a novel homeostatic regulation at the kinetochore that integrates protein phosphorylation and methylation with accurate chromosome segregation for maintenance of genomic stability.
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Affiliation(s)
- Ruoying Yu
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Huihui Wu
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Hazrat Ismail
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- BUCM-MSM-USTC Joint Program on Global Health Equity, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Shihao Du
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- BUCM-MSM-USTC Joint Program on Global Health Equity, Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Jun Cao
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
| | - Jianyu Wang
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
| | - Tarsha Ward
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- BUCM-MSM-USTC Joint Program on Global Health Equity, Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Fengrui Yang
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- BUCM-MSM-USTC Joint Program on Global Health Equity, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Ping Gui
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- BUCM-MSM-USTC Joint Program on Global Health Equity, Beijing University of Chinese Medicine, Beijing 100029, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Mahboob Ali
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- BUCM-MSM-USTC Joint Program on Global Health Equity, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Lingluo Chu
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Harvard Medical School, Boston, MA 02115, USA
| | - Fei Mo
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Harvard Medical School, Boston, MA 02115, USA
| | - Qi Wang
- Dalian Institute for Physical Chemistry, Dalian 116023, China
| | - Youjun Chu
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Jianye Zang
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
| | - Yun Zhao
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China
| | - Mingliang Ye
- Dalian Institute for Physical Chemistry, Dalian 116023, China
| | - Guowei Fang
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
| | - Peng R Chen
- College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhen Dou
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Xinjiao Gao
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
| | - Wenwen Wang
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Xing Liu
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
- Department of Physiology, Morehouse School of Medicine, Atlanta, GA 30310, USA
| | - Xuebiao Yao
- MOE Key Laboratory for Cellular Dynamics & Anhui Key Laboratory for Chemical Biology, CAS Center for Excellence in Molecular Cell Science, Hefei National Science Center for Physical Sciences at Microscale & University of Science and Technology of China, Hefei 230027, China
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15
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Tang R, Jiang Z, Chen F, Yu W, Fan K, Tan J, Zhang Z, Liu X, Li P, Yuan K. The Kinase Activity of Drosophila BubR1 Is Required for Insulin Signaling-Dependent Stem Cell Maintenance. Cell Rep 2020; 31:107794. [PMID: 32579921 DOI: 10.1016/j.celrep.2020.107794] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 04/29/2020] [Accepted: 05/31/2020] [Indexed: 02/06/2023] Open
Abstract
As a core component of the mitotic checkpoint complex, BubR1 has a modular organization of molecular functions, with KEN box and other motifs at the N terminus inhibiting the anaphase-promoting complex/cyclosome, and a kinase domain at the C terminus, whose function remains unsettled, especially at organismal levels. We generate knock-in BubR1 mutations in the Drosophila genome to separately disrupt the KEN box and the kinase domain. All of the mutants are homozygously viable and fertile and show no defects in mitotic progression. The mutants without kinase activity have an increased lifespan and phenotypic changes associated with attenuated insulin signaling, including reduced InR on the cell membrane, weakened PI3K and AKT activity, and elevated expression of dFoxO targets. The BubR1 kinase-dead mutants have a reduced cap cell number in female germaria, which can be rescued by expressing a constitutively active InR. We conclude that one major physiological role of BubR1 kinase in Drosophila is to modulate insulin signaling.
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Affiliation(s)
- Ruijun Tang
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China
| | - Zhenghui Jiang
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China
| | - Fang Chen
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Weiyu Yu
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China
| | - Kaijing Fan
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China
| | - Jieqiong Tan
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China
| | - Zhuohua Zhang
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China
| | - Xing Liu
- MOE Key Laboratory for Membraneless Organelles and Cellular Dynamics, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China.
| | - Pishun Li
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Kai Yuan
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Neurosurgery, Xiangya Hospital, and Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan 410008, China; Center for Clinical Biorepositories and Biospecimens, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China.
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16
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Song Y, Zhang Y, Pan Y, He J, Wang Y, Chen W, Guo J, Deng H, Xue Y, Fang X, Liang X. The microtubule end-binding affinity of EB1 is enhanced by a dimeric organization that is susceptible to phosphorylation. J Cell Sci 2020; 133:jcs241216. [PMID: 32152183 DOI: 10.1242/jcs.241216] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/28/2020] [Indexed: 12/18/2022] Open
Abstract
In cells, microtubule dynamics are regulated by plus-end tracking proteins (+TIPs). End-binding protein 1 (EB1, also known as MAPRE1) acts as a master regulator of +TIP networks by targeting the growing ends of microtubules and recruiting other factors. However, the molecular mechanism underlying high-affinity binding of EB1 to microtubule ends remains an open area of research. Using single-molecule imaging, we show that the end-binding kinetics of EB1 change when the polymerization and hydrolysis rates of tubulin dimers are altered, confirming that EB1 binds to GTP-tubulin and/or GDP-Pi-tubulin at microtubule growing ends. The affinity of wild-type EB1 to these sites is higher than that of monomeric EB1 mutants, suggesting that both calponin homology domains present in the EB1 dimer contribute to end binding. Introduction of phosphomimetic mutations into the EB1 linker domain weakens the end-binding affinity and confers a more curved conformation on the EB1 dimer without compromising dimerization, suggesting that the overall architecture of EB1 is important for its end-binding affinity. Taken together, our results provide insights into how the high-affinity end-binding of EB1 is achieved and how this activity may be regulated in cells.
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Affiliation(s)
- Yinlong Song
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Yikan Zhang
- Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Ying Pan
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, 100084 Beijing, China
- Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Jianfeng He
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Yan Wang
- Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Wei Chen
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Jing Guo
- Protein Chemistry Facility at the Center for Biomedical Analysis of Tsinghua University, 100084 Beijing, China
| | - Haiteng Deng
- Protein Chemistry Facility at the Center for Biomedical Analysis of Tsinghua University, 100084 Beijing, China
| | - Yi Xue
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, 100084 Beijing, China
- Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Xianyang Fang
- Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084 Beijing, China
| | - Xin Liang
- Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, 100084 Beijing, China
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17
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Niu X, Zheng F, Fu C. The concerted actions of Tip1/CLIP-170, Klp5/Kinesin-8, and Alp14/XMAP215 regulate microtubule catastrophe at the cell end. J Mol Cell Biol 2019; 11:956-966. [PMID: 31071203 PMCID: PMC6927233 DOI: 10.1093/jmcb/mjz039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/23/2019] [Accepted: 04/26/2019] [Indexed: 11/14/2022] Open
Abstract
Spatial regulation of microtubule catastrophe is important for controlling microtubule length and consequently contributes to the proper establishment of cell polarity and cell growth. The +TIP proteins including Tip1/CLIP-170, Klp5/Kinesin-8, and Alp14/XMAP215 reside at microtubule plus ends to regulate microtubule dynamics. In the fission yeast Schizosaccharomyces pombe, Tip1 and Alp14 serve as microtubule-stabilizing factors, while Klp5 functions oppositely as a catastrophe-promoting factor. Despite that Tip1 has been shown to play a key role in restricting microtubule catastrophe to the cell end, how Tip1 fulfills the role remains to be determined. Employing live-cell microscopy, we showed that the absence of Tip1 impairs the localization of both Klp5 and Alp14 at microtubule plus ends, but the absence of Klp5 prolongs the residence time of Tip1 at microtubule plus ends. We further revealed that Klp5 accumulates behind Tip1 at microtubule plus ends in a Tip1-dependent manner. In addition, artificially tethering Klp5 to microtubule plus ends promotes premature microtubule catastrophe, while tethering Alp14 to microtubule plus ends in the cells lacking Tip1 rescues the phenotype of short microtubules. These findings establish that Tip1 restricts microtubule catastrophe to the cell end likely by spatially restricting the microtubule catastrophe activity of Klp5 and stabilizing Alp14 at microtubule plus ends. Thus, the work demonstrates the orchestration of Tip1, Alp14, and Klp5 in ensuring microtubule catastrophe at the cell end.
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Affiliation(s)
- Xiaojia Niu
- Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences, University of Science and Technology of China, Hefei, Anhui, China.,Chinese Academy of Sciences Center for Excellence in Molecular Cell Sciences, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, University of Science and Technology of China, Hefei, China
| | - Fan Zheng
- Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences, University of Science and Technology of China, Hefei, Anhui, China.,Chinese Academy of Sciences Center for Excellence in Molecular Cell Sciences, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, University of Science and Technology of China, Hefei, China
| | - Chuanhai Fu
- Division of Molecular & Cell Biophysics, Hefei National Science Center for Physical Sciences, University of Science and Technology of China, Hefei, Anhui, China.,Chinese Academy of Sciences Center for Excellence in Molecular Cell Sciences, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China.,Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, University of Science and Technology of China, Hefei, China
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18
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Fluorescent Protein-Based Indicators for Functional Super-Resolution Imaging of Biomolecular Activities in Living Cells. Int J Mol Sci 2019; 20:ijms20225784. [PMID: 31744242 PMCID: PMC6887983 DOI: 10.3390/ijms20225784] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/15/2019] [Accepted: 11/15/2019] [Indexed: 11/16/2022] Open
Abstract
Super-resolution light microscopy (SRM) offers a unique opportunity for diffraction-unlimited imaging of biomolecular activities in living cells. To realize such potential, genetically encoded indicators were developed recently from fluorescent proteins (FPs) that exhibit phototransformation behaviors including photoactivation, photoconversion, and photoswitching, etc. Super-resolution observations of biomolecule interactions and biochemical activities have been demonstrated by exploiting the principles of bimolecular fluorescence complementation (BiFC), points accumulation for imaging nanoscale topography (PAINT), and fluorescence fluctuation increase by contact (FLINC), etc. To improve functional nanoscopy with the technology of genetically encoded indicators, it is essential to fully decipher the photo-induced chemistry of FPs and opt for innovative indicator designs that utilize not only fluorescence intensity but also multi-parametric readouts such as phototransformation kinetics. In parallel, technical improvements to both the microscopy optics and image analysis pipeline are promising avenues to increase the sensitivity and versatility of functional SRM.
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19
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Visualizing the inner life of microbes: practices of multi-color single-molecule localization microscopy in microbiology. Biochem Soc Trans 2019; 47:1041-1065. [PMID: 31296734 DOI: 10.1042/bst20180399] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 04/22/2019] [Accepted: 04/26/2019] [Indexed: 12/28/2022]
Abstract
In this review, we discuss multi-color single-molecule imaging and tracking strategies for studying microbial cell biology. We first summarize and compare the methods in a detailed literature review of published studies conducted in bacteria and fungi. We then introduce a guideline on which factors and parameters should be evaluated when designing a new experiment, from fluorophore and labeling choices to imaging routines and data analysis. Finally, we give some insight into some of the recent and promising applications and developments of these techniques and discuss the outlook for this field.
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20
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Yao X, Smolka AJ. Gastric Parietal Cell Physiology and Helicobacter pylori-Induced Disease. Gastroenterology 2019; 156:2158-2173. [PMID: 30831083 PMCID: PMC6715393 DOI: 10.1053/j.gastro.2019.02.036] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 02/12/2019] [Accepted: 02/14/2019] [Indexed: 12/13/2022]
Abstract
Acidification of the gastric lumen poses a barrier to transit of potentially pathogenic bacteria and enables activation of pepsin to complement nutrient proteolysis initiated by salivary proteases. Histamine-induced activation of the PKA signaling pathway in gastric corpus parietal cells causes insertion of proton pumps into their apical plasma membranes. Parietal cell secretion and homeostasis are regulated by signaling pathways that control cytoskeletal changes required for apical membrane remodeling and organelle and proton pump activities. Helicobacter pylori colonization of human gastric mucosa affects gastric epithelial cell plasticity and homeostasis, promoting epithelial progression to neoplasia. By intervening in proton pump expression, H pylori regulates the abundance and diversity of microbiota that populate the intestinal lumen. We review stimulation-secretion coupling and renewal mechanisms in parietal cells and the mechanisms by which H pylori toxins and effectors alter cell secretory pathways (constitutive and regulated) and organelles to establish and maintain their inter- and intracellular niches. Studies of bacterial toxins and their effector proteins have provided insights into parietal cell physiology and the mechanisms by which pathogens gain control of cell activities, increasing our understanding of gastrointestinal physiology, microbial infectious disease, and immunology.
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Affiliation(s)
- Xuebiao Yao
- MOE Key Laboratory of Cellular Dynamics, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei, China; Keck Center for Cellular Dynamics and Organoids Plasticity, Morehouse School of Medicine, Atlanta, Georgia.
| | - Adam J. Smolka
- Gastroenterology and Hepatology Division, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
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21
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Abstract
Many proteins can be split into fragments that spontaneously reassemble, without covalent linkage, into a functional protein. For split green fluorescent proteins (GFPs), fragment reassembly leads to a fluorescent readout, which has been widely used to investigate protein-protein interactions. We review the scope and limitations of this approach as well as other diverse applications of split GFPs as versatile sensors, molecular glues, optogenetic tools, and platforms for photophysical studies.
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Affiliation(s)
- Matthew G Romei
- Department of Chemistry, Stanford University, Stanford, California 94305, USA; ,
| | - Steven G Boxer
- Department of Chemistry, Stanford University, Stanford, California 94305, USA; ,
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22
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Greenwald EC, Mehta S, Zhang J. Genetically Encoded Fluorescent Biosensors Illuminate the Spatiotemporal Regulation of Signaling Networks. Chem Rev 2018; 118:11707-11794. [PMID: 30550275 PMCID: PMC7462118 DOI: 10.1021/acs.chemrev.8b00333] [Citation(s) in RCA: 302] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cellular signaling networks are the foundation which determines the fate and function of cells as they respond to various cues and stimuli. The discovery of fluorescent proteins over 25 years ago enabled the development of a diverse array of genetically encodable fluorescent biosensors that are capable of measuring the spatiotemporal dynamics of signal transduction pathways in live cells. In an effort to encapsulate the breadth over which fluorescent biosensors have expanded, we endeavored to assemble a comprehensive list of published engineered biosensors, and we discuss many of the molecular designs utilized in their development. Then, we review how the high temporal and spatial resolution afforded by fluorescent biosensors has aided our understanding of the spatiotemporal regulation of signaling networks at the cellular and subcellular level. Finally, we highlight some emerging areas of research in both biosensor design and applications that are on the forefront of biosensor development.
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Affiliation(s)
- Eric C Greenwald
- University of California , San Diego, 9500 Gilman Drive, BRFII , La Jolla , CA 92093-0702 , United States
| | - Sohum Mehta
- University of California , San Diego, 9500 Gilman Drive, BRFII , La Jolla , CA 92093-0702 , United States
| | - Jin Zhang
- University of California , San Diego, 9500 Gilman Drive, BRFII , La Jolla , CA 92093-0702 , United States
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23
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Song X, Liu W, Yuan X, Jiang J, Wang W, Mullen M, Zhao X, Zhang Y, Liu F, Du S, Rehman A, Tian R, Li J, Frost A, Song Z, Green HN, Henry C, Liu X, Ding X, Wang D, Yao X. Acetylation of ACAP4 regulates CCL18-elicited breast cancer cell migration and invasion. J Mol Cell Biol 2018; 10:559-572. [PMID: 30395269 PMCID: PMC6692856 DOI: 10.1093/jmcb/mjy058] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 08/03/2018] [Accepted: 08/20/2018] [Indexed: 01/03/2023] Open
Abstract
Tumor metastasis represents the main causes of cancer-related death. Our recent study showed that chemokine CCL18 secreted from tumor-associated macrophages regulates breast tumor metastasis, but the underlying mechanisms remain less clear. Here, we show that ARF6 GTPase-activating protein ACAP4 regulates CCL18-elicited breast cancer cell migration via the acetyltransferase PCAF-mediated acetylation. CCL18 stimulation elicited breast cancer cell migration and invasion via PCAF-dependent acetylation. ACAP4 physically interacts with PCAF and is a cognate substrate of PCAF during CCL18 stimulation. The acetylation site of ACAP4 by PCAF was mapped to Lys311 by mass spectrometric analyses. Importantly, dynamic acetylation of ACAP4 is essential for CCL18-induced breast cancer cell migration and invasion, as overexpression of the persistent acetylation-mimicking or non-acetylatable ACAP4 mutant blocked CCL18-elicited cell migration and invasion. Mechanistically, the acetylation of ACAP4 at Lys311 reduced the lipid-binding activity of ACAP4 to ensure a robust and dynamic cycling of ARF6-ACAP4 complex with plasma membrane in response to CCL18 stimulation. Thus, these results present a previously undefined mechanism by which CCL18-elicited acetylation of the PH domain controls dynamic interaction between ACAP4 and plasma membrane during breast cancer cell migration and invasion.
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Affiliation(s)
- Xiaoyu Song
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Wei Liu
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Xiao Yuan
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- Department of Chemistry, Southern University of Science & Technology, Shenzhen, China
| | - Jiying Jiang
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Wanjuan Wang
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - McKay Mullen
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Xuannv Zhao
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
| | - Yin Zhang
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Fusheng Liu
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Shihao Du
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, Beijing, China
| | - Adeel Rehman
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
| | - Ruijun Tian
- Department of Chemistry, Southern University of Science & Technology, Shenzhen, China
| | - Jian Li
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Andra Frost
- Department of Pathology, University of Alabama School of Medicine, Birmingham, AL, USA
| | - Zhenwei Song
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
| | - Hadiyah-Nicole Green
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Calmour Henry
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Xing Liu
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Xia Ding
- School of Basic Medical Sciences, Beijing University of Chinese Medicine, Beijing, China
- Keck Center for Cellular Dynamics & Department of Physiology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Dongmei Wang
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
| | - Xuebiao Yao
- Anhui Key Laboratory for Cellular Dynamics & Chemical Biology, Hefei National Science Center for Physical Sciences at Nanoscale, CAS Center of Excellence in Molecular Cell Sciences, University of Science & Technology of China, Hefei, China
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24
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Ran J, Luo Y, Zhang Y, Yang Y, Chen M, Liu M, Li D, Zhou J. Phosphorylation of EB1 regulates the recruitment of CLIP-170 and p150glued to the plus ends of astral microtubules. Oncotarget 2018; 8:9858-9867. [PMID: 28039481 PMCID: PMC5354776 DOI: 10.18632/oncotarget.14222] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 11/24/2016] [Indexed: 12/31/2022] Open
Abstract
Phosphorylation of end-binding protein 1 (EB1), a key member of microtubule plus end-tracking proteins (+TIPs), by apoptosis signal-regulating kinase 1 (ASK1) has been demonstrated to promote the stability of astral microtubules during mitosis by stimulating the binding of EB1 to microtubule plus ends. However, the roles of other members of the +TIPs family in ASK1/EB1-mediated regulation of astral microtubules are unknown. Herein, we show that ASK1-mediated phosphorylation of EB1 enhances the localization of cytoplasmic linker protein 170 (CLIP-170) and p150glued to the plus ends of astral microtubules. Depletion of ASK1 or expression of phospho-deficient or phospho-mimetic EB1 mutants results in changes in the levels of plus-end localized CLIP-170 or p150glued. Mechanistic studies reveal that EB1 phosphorylation promotes its interactions with CLIP-170 and p150glued, thereby recruiting these +TIPs to microtubules. Structural analysis suggests that serine-40 is the primary phosphorylation site on EB1 that exerts these effects. Together, these findings provide novel insight into the molecular mechanisms that regulate the interactions of EB1 with other +TIPs.
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Affiliation(s)
- Jie Ran
- Institute of Biomedical Sciences, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, Shandong 250014, China
| | - Youguang Luo
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yijun Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yang Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Miao Chen
- Institute of Biomedical Sciences, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, Shandong 250014, China
| | - Min Liu
- Institute of Biomedical Sciences, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, Shandong 250014, China
| | - Dengwen Li
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Jun Zhou
- Institute of Biomedical Sciences, College of Life Sciences, Key Laboratory of Animal Resistance Biology of Shandong Province, Shandong Normal University, Jinan, Shandong 250014, China.,State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin 300071, China
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25
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Hertel F, Mo GCH, Dedecker P, Zhang J. Observing the Assembly of Protein Complexes in Living Eukaryotic Cells in Super-Resolution Using refSOFI. Methods Mol Biol 2018; 1764:267-277. [PMID: 29605920 PMCID: PMC8580746 DOI: 10.1007/978-1-4939-7759-8_16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Few approaches are currently available that allow the detection of protein-protein interactions (PPIs) in super-resolution, and the observation of the assembly of protein complexes in living cells has been particularly challenging. We developed reconstituted fluorescence-based stochastic optical fluctuation imaging (refSOFI), which is based on bimolecular fluorescence complementation (BiFC) and SOFI, allowing us to detect protein complex assembly 30 min after the induction of complex formation. Here we describe how to use refSOFI to map the assembly of two proteins of interest into a complex within living cells at super-resolution.
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Affiliation(s)
- Fabian Hertel
- Department of Chemistry, University of Leuven, Heverlee, Belgium
| | - Gary C H Mo
- Department of Pharmacology, University of California at San Diego, La Jolla, CA, USA
| | - Peter Dedecker
- Department of Chemistry, University of Leuven, Heverlee, Belgium
| | - Jin Zhang
- Department of Pharmacology, University of California at San Diego, La Jolla, CA, USA.
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26
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Yuan X, Yao PY, Jiang J, Zhang Y, Su Z, Yao W, Wang X, Gui P, Mullen M, Henry C, Ward T, Wang W, Brako L, Tian R, Zhao X, Wang F, Cao X, Wang D, Liu X, Ding X, Yao X. MST4 kinase phosphorylates ACAP4 protein to orchestrate apical membrane remodeling during gastric acid secretion. J Biol Chem 2017; 292:16174-16187. [PMID: 28808054 DOI: 10.1074/jbc.m117.808212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Indexed: 12/18/2022] Open
Abstract
Digestion in the stomach depends on acidification of the lumen. Histamine-elicited acid secretion is triggered by activation of the PKA cascade, which ultimately results in the insertion of gastric H,K-ATPases into the apical plasma membranes of parietal cells. Our recent study revealed the functional role of PKA-MST4-ezrin signaling axis in histamine-elicited acid secretion. However, it remains uncharacterized how the PKA-MST4-ezrin signaling axis operates the insertion of H,K-ATPases into the apical plasma membranes of gastric parietal cells. Here we show that MST4 phosphorylates ACAP4, an ARF6 GTPase-activating protein, at Thr545 Histamine stimulation activates MST4 and promotes MST4 interaction with ACAP4. ACAP4 physically interacts with MST4 and is a cognate substrate of MST4 during parietal cell activation. The phosphorylation site of ACAP4 by MST4 was mapped to Thr545 by mass spectrometric analyses. Importantly, phosphorylation of Thr545 is essential for acid secretion in parietal cells because either suppression of ACAP4 or overexpression of non-phosphorylatable ACAP4 prevents the apical membrane reorganization and proton pump translocation elicited by histamine stimulation. In addition, persistent overexpression of MST4 phosphorylation-deficient ACAP4 results in inhibition of gastric acid secretion and blockage of tubulovesicle fusion to the apical membranes. Significantly, phosphorylation of Thr545 enables ACAP4 to interact with ezrin. Given the location of Thr545 between the GTPase-activating protein domain and the first ankyrin repeat, we reason that MST4 phosphorylation elicits a conformational change that enables ezrin-ACAP4 interaction. Taken together, these results define a novel molecular mechanism linking the PKA-MST4-ACAP4 signaling cascade to polarized acid secretion in gastric parietal cells.
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Affiliation(s)
- Xiao Yuan
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China
| | - Phil Y Yao
- the Beijing University of Chinese Medicine, Beijing 100029, China.,the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Jiying Jiang
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China
| | - Yin Zhang
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China.,the Beijing University of Chinese Medicine, Beijing 100029, China
| | - Zeqi Su
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China.,the Beijing University of Chinese Medicine, Beijing 100029, China
| | - Wendy Yao
- the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Xueying Wang
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China
| | - Ping Gui
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China
| | - McKay Mullen
- the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Calmour Henry
- the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Tarsha Ward
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China.,the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Wenwen Wang
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China.,the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Larry Brako
- the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Ruijun Tian
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China.,the Southern University of Science and Technology, Shenzhen 518055, China
| | - Xuannv Zhao
- the Beijing University of Chinese Medicine, Beijing 100029, China
| | - Fengsong Wang
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China.,the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310.,the Department of Biochemistry, Anhui Medical University, Hefei 230027, China, and
| | - Xinwang Cao
- the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310.,the Department of Biochemistry, Anhui Medical University, Hefei 230027, China, and
| | - Dongmei Wang
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China
| | - Xing Liu
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China, .,the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Xia Ding
- the Beijing University of Chinese Medicine, Beijing 100029, China,
| | - Xuebiao Yao
- From the BUCM-USTC Collaborative Center for Parietal Cell Research, CAS Center for Excellence in Molecular Cell Science, University of Science and Technology of China, Hefei 230027, China, .,the Keck Center for Cellular Dynamics, Morehouse School of Medicine, Atlanta, Georgia 30310
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27
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Wei J, Xu H, Meng W. Noncentrosomal microtubules regulate autophagosome transport through CAMSAP2-EB1 cross-talk. FEBS Lett 2017; 591:2379-2393. [PMID: 28726242 DOI: 10.1002/1873-3468.12758] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/02/2017] [Accepted: 07/13/2017] [Indexed: 12/24/2022]
Abstract
Microtubules (MTs) play essential roles in many steps of autophagy, an important degradation pathway in the maintenance of cellular homoeostasis. In many cells, MT networks are comprised of centrosomal MTs and noncentrosomal MTs. However, it is unknown whether noncentrosomal MTs and its binding proteins are involved in autophagy. Here, we show in HeLa cells that calmodulin-regulated spectrin-associated protein 2 (CAMSAP2), a noncentrosomal MT minus-end stabilizing protein, regulates retrograde transport of autophagosomes through MT dynamics. CAMSAP2 cooperates with EB1 to regulate end-binding protein 1 (EB1) behaviour at MT plus ends, MT growth directions and autophagosome transport. An association between CAMSAP2 and EB1 in the cytosol may modulate EB1 binding to MT plus ends. Collectively, our data indicate that noncentrosomal MTs regulate autophagy through a cross-talk between CAMSAP2 and EB1.
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Affiliation(s)
- Jieli Wei
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Honglin Xu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Wenxiang Meng
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
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28
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Ni Q, Mehta S, Zhang J. Live-cell imaging of cell signaling using genetically encoded fluorescent reporters. FEBS J 2017; 285:203-219. [PMID: 28613457 DOI: 10.1111/febs.14134] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 05/19/2017] [Accepted: 06/09/2017] [Indexed: 12/31/2022]
Abstract
Synergistic advances in fluorescent protein engineering and live-cell imaging techniques in recent years have fueled the concurrent development and application of genetically encoded fluorescent reporters that are tailored for tracking signaling dynamics in living systems over multiple length and time scales. These biosensors are uniquely suited for this challenging task, owing to their specificity, sensitivity, and versatility, as well as to the noninvasive and nondestructive nature of fluorescence and the power of genetic encoding. Over the past 10 years, a growing number of fluorescent reporters have been developed for tracking a wide range of biological signals in living cells and animals, including second messenger and metabolite dynamics, enzyme activation and activity, and cell cycle progression and neuronal activity. Many of these biosensors are gaining wide use and are proving to be indispensable for unraveling the complex biological functions of individual signaling molecules in their native environment, the living cell, shedding new light on the structural and molecular underpinnings of cell signaling. In this review, we highlight recent advances in protein engineering that are likely to help expand and improve the design and application of these valuable tools. We then turn our focus to specific examples of live-cell imaging using genetically encoded fluorescent reporters as an important platform for advancing our understanding of G protein-coupled receptor signaling and neuronal activity.
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Affiliation(s)
- Qiang Ni
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
| | - Sohum Mehta
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
| | - Jin Zhang
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA.,Department of Pharmacology and Molecular Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
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29
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Rodriguez EA, Campbell RE, Lin JY, Lin MZ, Miyawaki A, Palmer AE, Shu X, Zhang J, Tsien RY. The Growing and Glowing Toolbox of Fluorescent and Photoactive Proteins. Trends Biochem Sci 2016; 42:111-129. [PMID: 27814948 DOI: 10.1016/j.tibs.2016.09.010] [Citation(s) in RCA: 393] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/21/2016] [Accepted: 09/26/2016] [Indexed: 02/08/2023]
Abstract
Over the past 20 years, protein engineering has been extensively used to improve and modify the fundamental properties of fluorescent proteins (FPs) with the goal of adapting them for a fantastic range of applications. FPs have been modified by a combination of rational design, structure-based mutagenesis, and countless cycles of directed evolution (gene diversification followed by selection of clones with desired properties) that have collectively pushed the properties to photophysical and biochemical extremes. In this review, we provide both a summary of the progress that has been made during the past two decades, and a broad overview of the current state of FP development and applications in mammalian systems.
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Affiliation(s)
- Erik A Rodriguez
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, USA.
| | - Robert E Campbell
- Department of Chemistry, University of Alberta, Edmonton, AB, T6G 2G2, Canada.
| | - John Y Lin
- School of Medicine, University of Tasmania, Hobart, TAS 7000, Australia.
| | - Michael Z Lin
- Department of Bioengineering, Stanford University, Stanford, CA, 94305, USA; Department of Pediatrics, Stanford University, Stanford, CA, 94305, USA.
| | - Atsushi Miyawaki
- Laboratory for Cell Function Dynamics, Brain Science Institute, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
| | - Amy E Palmer
- Department of Chemistry and Biochemistry, BioFrontiers Institute, University of Colorado, Boulder, CO, 80303, USA.
| | - Xiaokun Shu
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA, 94158, USA; Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, 94158, USA.
| | - Jin Zhang
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, USA.
| | - Roger Y Tsien
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, USA; Howard Hughes Medical Institute, University of California, San Diego, La Jolla, CA, 92093, USA.
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Abstract
Super resolution imaging is becoming an increasingly important tool in the arsenal of methods available to cell biologists. In recognition of its potential, the Nobel Prize for chemistry was awarded to three investigators involved in the development of super resolution imaging methods in 2014. The availability of commercial instruments for super resolution imaging has further spurred the development of new methods and reagents designed to take advantage of super resolution techniques. Super resolution offers the advantages traditionally associated with light microscopy, including the use of gentle fixation and specimen preparation methods, the ability to visualize multiple elements within a single specimen, and the potential to visualize dynamic changes in living specimens over time. However, imaging of living cells over time is difficult and super resolution imaging is computationally demanding. In this review, we discuss the advantages/disadvantages of different super resolution systems for imaging fixed live specimens, with particular regard to cytoskeleton structures.
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Affiliation(s)
- Eric A Shelden
- School of Molecular Biosciences, Washington State University, Pullman, WA, USA
| | - Zachary T Colburn
- School of Molecular Biosciences, Washington State University, Pullman, WA, USA
| | - Jonathan C R Jones
- School of Molecular Biosciences, Washington State University, Pullman, WA, USA
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31
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Cammarata GM, Bearce EA, Lowery LA. Cytoskeletal social networking in the growth cone: How +TIPs mediate microtubule-actin cross-linking to drive axon outgrowth and guidance. Cytoskeleton (Hoboken) 2016; 73:461-76. [PMID: 26783725 DOI: 10.1002/cm.21272] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 01/08/2016] [Accepted: 01/08/2016] [Indexed: 11/08/2022]
Abstract
The growth cone is a unique structure capable of guiding axons to their proper destinations. Within the growth cone, extracellular guidance cues are interpreted and then transduced into physical changes in the actin filament (F-actin) and microtubule cytoskeletons, providing direction and movement. While both cytoskeletal networks individually possess important growth cone-specific functions, recent data over the past several years point towards a more cooperative role between the two systems. Facilitating this interaction between F-actin and microtubules, microtubule plus-end tracking proteins (+TIPs) have been shown to link the two cytoskeletons together. Evidence suggests that many +TIPs can couple microtubules to F-actin dynamics, supporting both microtubule advance and retraction in the growth cone periphery. In addition, growing in vitro and in vivo data support a secondary role for +TIPs in which they may participate as F-actin nucleators, thus directly influencing F-actin dynamics and organization. This review focuses on how +TIPs may link F-actin and microtubules together in the growth cone, and how these interactions may influence axon guidance. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
| | | | - Laura Anne Lowery
- Department of Biology, Boston College, Chestnut Hill, Massachusetts.
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Hertel F, Mo GCH, Duwé S, Dedecker P, Zhang J. RefSOFI for Mapping Nanoscale Organization of Protein-Protein Interactions in Living Cells. Cell Rep 2015; 14:390-400. [PMID: 26748717 DOI: 10.1016/j.celrep.2015.12.036] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 09/04/2015] [Accepted: 12/06/2015] [Indexed: 11/27/2022] Open
Abstract
It has become increasingly clear that protein-protein interactions (PPIs) are compartmentalized in nanoscale domains that define the biochemical architecture of the cell. Despite tremendous advances in super-resolution imaging, strategies to observe PPIs at sufficient resolution to discern their organization are just emerging. Here we describe a strategy in which PPIs induce reconstitution of fluorescent proteins (FPs) that are capable of exhibiting single-molecule fluctuations suitable for stochastic optical fluctuation imaging (SOFI). Subsequently, spatial maps of these interactions can be resolved in super-resolution in living cells. Using this strategy, termed reconstituted fluorescence-based SOFI (refSOFI), we investigated the interaction between the endoplasmic reticulum (ER) Ca(2+) sensor STIM1 and the pore-forming channel subunit ORAI1, a crucial process in store-operated Ca(2+) entry (SOCE). Stimulating SOCE does not appear to change the size of existing STIM1/ORAI1 interaction puncta at the ER-plasma membrane junctions, but results in an apparent increase in the number of interaction puncta.
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Affiliation(s)
- Fabian Hertel
- Department of Pharmacology, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Gary C H Mo
- Department of Pharmacology, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Sam Duwé
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Peter Dedecker
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, 3001 Heverlee, Belgium
| | - Jin Zhang
- Department of Pharmacology, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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33
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Nickerson A, Huang T, Lin LJ, Nan X. Photoactivated Localization Microscopy with Bimolecular Fluorescence Complementation (BiFC-PALM). J Vis Exp 2015:e53154. [PMID: 26779930 DOI: 10.3791/53154] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Protein-protein interactions (PPIs) are key molecular events to biology. However, it remains a challenge to visualize PPIs with sufficient resolution and sensitivity in cells because the resolution of conventional light microscopy is diffraction-limited to ~250 nm. By combining bimolecular fluorescence complementation (BiFC) with photoactivated localization microscopy (PALM), PPIs can be visualized in cells with single molecule sensitivity and nanometer spatial resolution. BiFC is a commonly used technique for visualizing PPIs with fluorescence contrast, which involves splitting of a fluorescent protein into two non-fluorescent fragments. PALM is a recent superresolution microscopy technique for imaging biological samples at the nanometer and single molecule scales, which uses phototransformable fluorescent probes such as photoactivatable fluorescent proteins (PA-FPs). BiFC-PALM was demonstrated by splitting PAmCherry1, a PA-FP compatible with PALM, for its monomeric nature, good single molecule brightness, high contrast ratio, and utility for stoichiometry measurements. When split between amino acids 159 and 160, PAmCherry1 can be made into a BiFC probe that reconstitutes efficiently at 37 °C with high specificity to PPIs and low non-specific reconstitution. Ras-Raf interaction is used as an example to show how BiFC-PALM helps to probe interactions at the nanometer scale and with single molecule resolution. Their diffusion can also be tracked in live cells using single molecule tracking (smt-) PALM. In this protocol, factors to consider when designing the fusion proteins for BiFC-PALM are discussed, sample preparation, image acquisition, and data analysis steps are explained, and a few exemplary results are showcased. Providing high spatial resolution, specificity, and sensitivity, BiFC-PALM is a useful tool for studying PPIs in intact biological samples.
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Affiliation(s)
- Andrew Nickerson
- Department of Biomedical Engineering, Oregon Health and Science University; Knight Cancer Institute, Oregon Health and Science University; OHSU Center for Spatial Systems Biomedicine, Oregon Health and Science University
| | - Tao Huang
- Department of Biomedical Engineering, Oregon Health and Science University; Knight Cancer Institute, Oregon Health and Science University; OHSU Center for Spatial Systems Biomedicine, Oregon Health and Science University
| | - Li-Jung Lin
- Department of Biomedical Engineering, Oregon Health and Science University; Knight Cancer Institute, Oregon Health and Science University; OHSU Center for Spatial Systems Biomedicine, Oregon Health and Science University
| | - Xioalin Nan
- Department of Biomedical Engineering, Oregon Health and Science University; Knight Cancer Institute, Oregon Health and Science University; OHSU Center for Spatial Systems Biomedicine, Oregon Health and Science University;
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34
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Control of microtubule organization and dynamics: two ends in the limelight. Nat Rev Mol Cell Biol 2015; 16:711-26. [PMID: 26562752 DOI: 10.1038/nrm4084] [Citation(s) in RCA: 600] [Impact Index Per Article: 66.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Microtubules have fundamental roles in many essential biological processes, including cell division and intracellular transport. They assemble and disassemble from their two ends, denoted the plus end and the minus end. Significant advances have been made in our understanding of microtubule plus-end-tracking proteins (+TIPs) such as end-binding protein 1 (EB1), XMAP215, selected kinesins and dynein. By contrast, information on microtubule minus-end-targeting proteins (-TIPs), such as the calmodulin-regulated spectrin-associated proteins (CAMSAPs) and Patronin, has only recently started to emerge. Here, we review our current knowledge of factors, including microtubule-targeting agents, that associate with microtubule ends to control the dynamics and function of microtubules during the cell cycle and development.
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35
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TOG Proteins Are Spatially Regulated by Rac-GSK3β to Control Interphase Microtubule Dynamics. PLoS One 2015; 10:e0138966. [PMID: 26406596 PMCID: PMC4583408 DOI: 10.1371/journal.pone.0138966] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 09/08/2015] [Indexed: 11/26/2022] Open
Abstract
Microtubules are regulated by a diverse set of proteins that localize to microtubule plus ends (+TIPs) where they regulate dynamic instability and mediate interactions with the cell cortex, actin filaments, and organelles. Although individual +TIPs have been studied in depth and we understand their basic contributions to microtubule dynamics, there is a growing body of evidence that these proteins exhibit cross-talk and likely function to collectively integrate microtubule behavior and upstream signaling pathways. In this study, we have identified a novel protein-protein interaction between the XMAP215 homologue in Drosophila, Mini spindles (Msps), and the CLASP homologue, Orbit. These proteins have been shown to promote and suppress microtubule dynamics, respectively. We show that microtubule dynamics are regionally controlled in cells by Rac acting to suppress GSK3β in the peripheral lamellae/lamellipodium. Phosphorylation of Orbit by GSK3β triggers a relocalization of Msps from the microtubule plus end to the lattice. Mutation of the Msps-Orbit binding site revealed that this interaction is required for regulating microtubule dynamic instability in the cell periphery. Based on our findings, we propose that Msps is a novel Rac effector that acts, in partnership with Orbit, to regionally regulate microtubule dynamics.
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36
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Jiang H, Wang W, Zhang Y, Yao WW, Jiang J, Qin B, Yao WY, Liu F, Wu H, Ward TL, Chen CW, Liu L, Ding X, Liu X, Yao X. Cell Polarity Kinase MST4 Cooperates with cAMP-dependent Kinase to Orchestrate Histamine-stimulated Acid Secretion in Gastric Parietal Cells. J Biol Chem 2015; 290:28272-28285. [PMID: 26405038 DOI: 10.1074/jbc.m115.668855] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Indexed: 01/13/2023] Open
Abstract
The digestive function of the stomach depends on acidification of the gastric lumen. Acid secretion into the lumen is triggered by activation of the PKA cascade, which ultimately results in the insertion of gastric H,K-ATPases into the apical plasma membranes of parietal cells. A coupling protein is ezrin, whose phosphorylation at Ser-66 by PKA is required for parietal cell activation. However, little is known regarding the molecular mechanism(s) by which this signaling pathway operates in gastric acid secretion. Here we show that PKA cooperates with MST4 to orchestrate histamine-elicited acid secretion by phosphorylating ezrin at Ser-66 and Thr-567. Histamine stimulation activates PKA, which phosphorylates MST4 at Thr-178 and then promotes MST4 kinase activity. Interestingly, activated MST4 then phosphorylates ezrin prephosphorylated by PKA. Importantly, MST4 is important for acid secretion in parietal cells because either suppression of MST4 or overexpression of non-phosphorylatable MST4 prevents the apical membrane reorganization and proton pump translocation elicited by histamine stimulation. In addition, overexpressing MST4 phosphorylation-deficient ezrin results in an inhibition of gastric acid secretion. Taken together, these results define a novel molecular mechanism linking the PKA-MST4-ezrin signaling cascade to polarized epithelial secretion in gastric parietal cells.
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Affiliation(s)
- Hao Jiang
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China
| | - Wenwen Wang
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310
| | - Yin Zhang
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Beijing University of Chinese Medicine, Beijing 100029, China
| | - William W Yao
- Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310
| | - Jiying Jiang
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China
| | - Bo Qin
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310
| | - Wendy Y Yao
- Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310
| | - Fusheng Liu
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Beijing University of Chinese Medicine, Beijing 100029, China; Airforce General Hospital, Beijing 100036, China
| | - Huihui Wu
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310
| | - Tarsha L Ward
- Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310
| | - Chun Wei Chen
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China
| | - Lifang Liu
- Airforce General Hospital, Beijing 100036, China
| | - Xia Ding
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Beijing University of Chinese Medicine, Beijing 100029, China.
| | - Xing Liu
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,; Molecular Imaging Center, Atlanta Clinical and Translational Science Institute, Atlanta, Georgia 30310.
| | - Xuebiao Yao
- BUCM-USTC Joint Program in Cellular Dynamics and Anhui Key Laboratory for Cellular Dynamics, University of Science and Technology of China, Hefei 230027, China,.
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37
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Cao D, Su Z, Wang W, Wu H, Liu X, Akram S, Qin B, Zhou J, Zhuang X, Adams G, Jin C, Wang X, Liu L, Hill DL, Wang D, Ding X, Yao X. Signaling Scaffold Protein IQGAP1 Interacts with Microtubule Plus-end Tracking Protein SKAP and Links Dynamic Microtubule Plus-end to Steer Cell Migration. J Biol Chem 2015; 290:23766-80. [PMID: 26242911 DOI: 10.1074/jbc.m115.673517] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2015] [Indexed: 12/27/2022] Open
Abstract
Cell migration is orchestrated by dynamic interaction of microtubules with the plasma membrane cortex. However, the regulatory mechanisms underlying the cortical actin cytoskeleton and microtubule dynamics are less characterized. Our earlier study showed that small GTPase-activating proteins, IQGAPs, regulate polarized secretion in epithelial cells (1). Here, we show that IQGAP1 links dynamic microtubules to steer cell migration via interacting with the plus-end tracking protein, SKAP. Biochemical characterizations revealed that IQGAP1 and SKAP form a cognate complex and that their binding interfaces map to the WWIQ motif and the C-terminal of SKAP, respectively. The WWIQ peptide disrupts the biochemical interaction between IQGAP1 and SKAP in vitro, and perturbation of the IQGAP1-SKAP interaction in vivo using a membrane-permeable TAT-WWIQ peptide results in inhibition of directional cell migration elicited by EGF. Mechanistically, the N-terminal of SKAP binds to EB1, and its C terminus binds to IQGAP1 in migrating cells. Thus, we reason that a novel IQGAP1 complex orchestrates directional cell migration via coupling dynamic microtubule plus-ends to the cell cortex.
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Affiliation(s)
- Dan Cao
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Beijing University of Chinese Medicine, Beijing, China 100029, the Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Zeqi Su
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Beijing University of Chinese Medicine, Beijing, China 100029
| | - Wenwen Wang
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Beijing University of Chinese Medicine, Beijing, China 100029, the Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Huihui Wu
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Morehouse School of Medicine, Atlanta, Georgia 30310, the Airforce General Hospital, Beijing, China 100036, and
| | - Xing Liu
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Beijing University of Chinese Medicine, Beijing, China 100029, the Morehouse School of Medicine, Atlanta, Georgia 30310,
| | - Saima Akram
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027
| | - Bo Qin
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Morehouse School of Medicine, Atlanta, Georgia 30310, the Airforce General Hospital, Beijing, China 100036, and
| | - Jiajia Zhou
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Airforce General Hospital, Beijing, China 100036, and
| | - Xiaoxuan Zhuang
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027
| | - Gregory Adams
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Changjiang Jin
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027
| | - Xiwei Wang
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Morehouse School of Medicine, Atlanta, Georgia 30310
| | - Lifang Liu
- the Airforce General Hospital, Beijing, China 100036, and
| | - Donald L Hill
- the Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama 35294
| | - Dongmei Wang
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027,
| | - Xia Ding
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027, the Beijing University of Chinese Medicine, Beijing, China 100029,
| | - Xuebiao Yao
- From the BUCM-USTC Joint Program for Cellular Dynamics & Chemical Biology, University of Science & Technology of China, Hefei, China 230027
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Cdk1: conductor of CENP-A symphony orchestra. Sci Bull (Beijing) 2015. [DOI: 10.1007/s11434-015-0744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Yu H, Zhou J, Takahashi H, Yao W, Suzuki Y, Yuan X, Yoshimura SH, Zhang Y, Liu Y, Emmett N, Bond V, Wang D, Ding X, Takeyasu K, Yao X. Spatial control of proton pump H,K-ATPase docking at the apical membrane by phosphorylation-coupled ezrin-syntaxin 3 interaction. J Biol Chem 2014; 289:33333-42. [PMID: 25301939 PMCID: PMC4246090 DOI: 10.1074/jbc.m114.581280] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 10/08/2014] [Indexed: 11/06/2022] Open
Abstract
The digestive function of the stomach depends on acidification of the gastric lumen. Acid secretion into the lumen is triggered by activation of a cAMP-dependent protein kinase (PKA) cascade, which ultimately results in the insertion of gastric H,K-ATPases into the apical plasma membranes of parietal cells. A coupling protein is ezrin whose phosphorylation at Ser-66 by PKA is required for parietal cell activation. However, little is known regarding the molecular mechanism(s) by which ezrin operates in gastric acid secretion. Here we show that phosphorylation of Ser-66 induces a conformational change of ezrin that enables its association with syntaxin 3 (Stx3) and provides a spatial cue for H,K-ATPase trafficking. This conformation-dependent association is specific for Stx3, and the binding interface is mapped to the N-terminal region. Biochemical analyses show that inhibition of ezrin phosphorylation at Ser-66 prevents ezrin-Stx3 association and insertion of H,K-ATPase into the apical plasma membrane of parietal cells. Using atomic force microscopic analyses, our study revealed that phosphorylation of Ser-66 induces unfolding of ezrin molecule to allow Stx3 binding to its N terminus. Given the essential role of Stx3 in polarized secretion, our study presents the first evidence in which phosphorylation-induced conformational rearrangement of the ezrin molecule provides a spatial cue for polarized membrane trafficking in epithelial cells.
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Affiliation(s)
- Huijuan Yu
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027
| | - Jiajia Zhou
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027, Morehouse School of Medicine, Atlanta, Georgia 30310, and
| | - Hirohide Takahashi
- Laboratory of Plasma Membrane, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - William Yao
- Morehouse School of Medicine, Atlanta, Georgia 30310, and
| | - Yuki Suzuki
- Laboratory of Plasma Membrane, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Xiao Yuan
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027
| | - Shige H Yoshimura
- Laboratory of Plasma Membrane, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Yin Zhang
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027, Graduate School, Beijing University of Chinese Medicine, Beijing 100086, China
| | - Ya Liu
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027
| | | | - Vincent Bond
- Morehouse School of Medicine, Atlanta, Georgia 30310, and
| | - Dongmei Wang
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027
| | - Xia Ding
- Graduate School, Beijing University of Chinese Medicine, Beijing 100086, China
| | - Kunio Takeyasu
- Laboratory of Plasma Membrane, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan,
| | - Xuebiao Yao
- From the Anhui Key Laboratory for Cellular Dynamics and Chemical Biology, University of Science and Technology of China School of Life Science, Hefei, China 230027,
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