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Haque MA, Barman DN, Rahman A, Hossain MS, Ghosh S, Nahar MA, Nahar MNEN, Saha JK, Cho KM, Yun HD. Molecular Cloning, In Silico Analysis, and Characterization of a Novel Cellulose Microfibril Swelling Gene Isolated from Bacillus sp. Strain AY8. Microorganisms 2023; 11:2857. [PMID: 38138001 PMCID: PMC10745351 DOI: 10.3390/microorganisms11122857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/16/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
A novel cellulose microfibril swelling (Cms) gene of Bacillus sp. AY8 was successfully cloned and sequenced using a set of primers designed based on the conserved region of the gene from the genomic database. The molecular cloning of the Cms gene revealed that the gene consisted of 679 bp sequences encoding 225 amino acids. Further in silico analysis unveiled that the Cms gene contained the NlpC/P60 conserved region that exhibited a homology of 98% with the NlpC/P60 family proteins found in both the strains, Burkholderialata sp. and Burkholderia vietnamiensis. The recombinant Cms enzyme had a significant impact on the reduction of crystallinity indices (CrI) of various substrates including a 3%, a 3.97%, a 4.66%, and a substantial 14.07% for filter paper, defatted cotton fiber, avicel, and alpha cellulose, respectively. Additionally, notable changes in the spectral features were observed among the substrates treated with recombinant Cms enzymes compared to the untreated control. Specifically, there was a decrease in band intensities within the spectral regions of 3000-3450 cm-1, 2900 cm-1, 1429 cm-1, and 1371 cm-1 for the treated filter paper, cotton fiber, avicel, and alpha cellulose, respectively. Furthermore, the recombinant Cms enzyme exhibited a maximum cellulose swelling activity at a pH of 7.0 along with a temperature of 40 °C. The molecular docking data revealed that ligand molecules, such as cellobiose, dextrin, maltose 1-phosphate, and feruloyated xyloglucan, effectively bonded to the active site of the Cms enzyme. The molecular dynamics simulations of the Cms enzyme displayed stable interactions with cellobiose and dextrin molecules up to 100 ns. It is noteworthy to mention that the conserved region of the Cms enzyme did not match with those of the bioadditives like expansins and swollenin proteins. This study is the initial report of a bacterial cellulose microfibril swellase enzyme, which could potentially serve as an additive to enhance biofuel production by releasing fermentable sugars from cellulose.
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Affiliation(s)
- Md. Azizul Haque
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh; (M.S.H.); (M.A.N.); (M.N.-E.-N.N.)
| | - Dhirendra Nath Barman
- Department of Biotechnology and Genetic Engineering, Noakhali Science and Technology University, Noakhali 3814, Bangladesh;
| | - Aminur Rahman
- Department of Biomedical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Md. Shohorab Hossain
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh; (M.S.H.); (M.A.N.); (M.N.-E.-N.N.)
- Department of Biochemistry and Molecular Biology, Trust University, Barisal 8200, Bangladesh
| | - Sibdas Ghosh
- Department of Biological Sciences, College of Arts and Sciences, Carlow University, 3333 Fifth Avenue, Pittsburgh, PA 15213, USA;
| | - Most. Aynun Nahar
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh; (M.S.H.); (M.A.N.); (M.N.-E.-N.N.)
| | - Mst. Nur-E-Nazmun Nahar
- Department of Biochemistry and Molecular Biology, Hajee Mohammad Danesh Science and Technology University, Dinajpur 5200, Bangladesh; (M.S.H.); (M.A.N.); (M.N.-E.-N.N.)
| | - Joyanta K. Saha
- Department of Chemistry, Jagannath University, Dhaka 1100, Bangladesh;
| | - Kye Man Cho
- Department of GreenBio Science and Agri-Food Bio Convergence Institute, Gyeongsang National University, Jinju 52725, Republic of Korea
| | - Han Dae Yun
- Division of Applied Life Science (BK21 Program), Gyeongsang National University, Jinju 52725, Republic of Korea
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Iwano T, Sobajima T, Takeda S, Harada A, Yoshimura SI. The Rab GTPase-binding protein EHBP1L1 and its interactors CD2AP/CIN85 negatively regulate the length of primary cilia via actin remodeling. J Biol Chem 2023; 299:102985. [PMID: 36754282 PMCID: PMC9986712 DOI: 10.1016/j.jbc.2023.102985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 01/27/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
Primary cilia are organelles consisting of axonemal microtubules and plasma membranes, and they protrude from the cell surface to the extracellular region and function in signal sensing and transduction. The integrity of cilia, including the length and structure, is associated with signaling functions; however, factors involved in regulating the integrity of cilia have not been fully elucidated. Here, we showed that the Rab GTPase-binding protein EHBP1L1 and its newly identified interactors CD2AP and CIN85, known as adaptor proteins of actin regulators, are involved in ciliary length control. Immunofluorescence microscopy showed that EHBP1L1 and CD2AP/CIN85 are localized to the ciliary sheath. EHBP1L1 depletion caused mislocalization of CD2AP/CIN85, suggesting that CD2AP/CIN85 localization to the ciliary sheath is dependent on EHBP1L1. Additionally, we determined that EHBP1L1- and CD2AP/CIN85-depleted cells had elongated cilia. The aberrantly elongated cilia phenotype and the ciliary localization defect of CD2AP/CIN85 in EHBP1L1-depleted cells were rescued by the expression of WT EHBP1L1, although this was not observed in the CD2AP/CIN85-binding-deficient mutant, indicating that the EHBP1L1-CD2AP/CIN85 interaction is crucial for controlling ciliary length. Furthermore, EHBP1L1- and CD2AP/CIN85-depleted cells exhibited actin nucleation and branching defects around the ciliary base. Taken together, our data demonstrate that the EHBP1L1-CD2AP/CIN85 axis negatively regulates ciliary length via actin network remodeling around the basal body.
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Affiliation(s)
- Tomohiko Iwano
- Department of Anatomy and Cell Biology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan
| | - Tomoaki Sobajima
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan; Department of Biochemistry, University of Oxford, Oxford, UK
| | - Sén Takeda
- Department of Anatomy and Cell Biology, Faculty of Medicine, University of Yamanashi, Chuo, Yamanashi, Japan; Department of Anatomy, Teikyo University School of Medicine, Itabashi, Tokyo, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Shin-Ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
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3
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Gulotta MR, Vittorio S, Gitto R, Perricone U, De Luca L. Exploring Molecular Contacts of MUC1 at CIN85 Binding Interface to Address Future Drug Design Efforts. Int J Mol Sci 2021; 22:2208. [PMID: 33672244 PMCID: PMC7927047 DOI: 10.3390/ijms22042208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/18/2021] [Accepted: 02/20/2021] [Indexed: 12/17/2022] Open
Abstract
The modulation of protein-protein interactions (PPIs) by small molecules represents a valuable strategy for pharmacological intervention in several human diseases. In this context, computer-aided drug discovery techniques offer useful resources to predict the network of interactions governing the recognition process between protein partners, thus furnishing relevant information for the design of novel PPI modulators. In this work, we focused our attention on the MUC1-CIN85 complex as a crucial PPI controlling cancer progression and metastasis. MUC1 is a transmembrane glycoprotein whose extracellular domain contains a variable number of tandem repeats (VNTRs) regions that are highly glycosylated in normal cells and under-glycosylated in cancer. The hypo-glycosylation fosters the exposure of the backbone to new interactions with other proteins, such as CIN85, that alter the intracellular signalling in tumour cells. Herein, different computational approaches were combined to investigate the molecular recognition pattern of MUC1-CIN85 PPI thus unveiling new structural information useful for the design of MUC1-CIN85 PPI inhibitors as potential anti-metastatic agents.
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Affiliation(s)
- Maria Rita Gulotta
- Molecular Informatics Unit, Fondazione Ri.MED, Via Filippo Marini 14, 90138 Palermo, Italy; (M.R.G.); (U.P.)
| | - Serena Vittorio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci 13, 98168 Messina, Italy; (R.G.); (L.D.L.)
| | - Rosaria Gitto
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci 13, 98168 Messina, Italy; (R.G.); (L.D.L.)
| | - Ugo Perricone
- Molecular Informatics Unit, Fondazione Ri.MED, Via Filippo Marini 14, 90138 Palermo, Italy; (M.R.G.); (U.P.)
| | - Laura De Luca
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Palatucci 13, 98168 Messina, Italy; (R.G.); (L.D.L.)
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Mlera L, Moy M, Maness K, Tran LN, Goodrum FD. The Role of the Human Cytomegalovirus UL133-UL138 Gene Locus in Latency and Reactivation. Viruses 2020; 12:E714. [PMID: 32630219 PMCID: PMC7411667 DOI: 10.3390/v12070714] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 06/29/2020] [Accepted: 06/29/2020] [Indexed: 12/13/2022] Open
Abstract
Human cytomegalovirus (HCMV) latency, the means by which the virus persists indefinitely in an infected individual, is a major frontier of current research efforts in the field. Towards developing a comprehensive understanding of HCMV latency and its reactivation from latency, viral determinants of latency and reactivation and their host interactions that govern the latent state and reactivation from latency have been identified. The polycistronic UL133-UL138 locus encodes determinants of both latency and reactivation. In this review, we survey the model systems used to investigate latency and new findings from these systems. Particular focus is given to the roles of the UL133, UL135, UL136 and UL138 proteins in regulating viral latency and how their known host interactions contribute to regulating host signaling pathways towards the establishment of or exit from latency. Understanding the mechanisms underlying viral latency and reactivation is important in developing strategies to block reactivation and prevent CMV disease in immunocompromised individuals, such as transplant patients.
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Affiliation(s)
- Luwanika Mlera
- BIO5 Institute, University of Arizona, Tucson, AZ 85719, USA;
| | - Melissa Moy
- Graduate Interdisciplinary Program in Cancer Biology, Tucson, AZ 85719, USA;
| | - Kristen Maness
- Immunobiology Department, University of Arizona, Tucson, AZ 85719, USA; (K.M.); (L.N.T.)
| | - Linh N. Tran
- Immunobiology Department, University of Arizona, Tucson, AZ 85719, USA; (K.M.); (L.N.T.)
| | - Felicia D. Goodrum
- BIO5 Institute, University of Arizona, Tucson, AZ 85719, USA;
- Graduate Interdisciplinary Program in Cancer Biology, Tucson, AZ 85719, USA;
- Immunobiology Department, University of Arizona, Tucson, AZ 85719, USA; (K.M.); (L.N.T.)
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5
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Li Y, Wang B, Wang ZW, Huang Y, Jian JC, Lu YS. Molecular cloning, characterization and expression profiles of CD2AP in Nile tilapia (Oreochromis niloticus) responding to Streptococcus agalactiae infection and interaction with CD2 cytoplasmic segment. FISH & SHELLFISH IMMUNOLOGY 2020; 101:205-215. [PMID: 32247045 DOI: 10.1016/j.fsi.2020.03.054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/23/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
The interaction between CD2-associated protein (CD2AP) and CD2 plays a vital role in lymphocyte adhesion and T cells activation in mammals. In this study, a CD2AP gene (GenBank accession number: MK579862; designated as On-CD2AP) was identified from tilapia (Oreochromis niloticus). Sequence analysis showed that On-CD2AP protein shares high similarity with mammals, including three Src homology 3 (SH3) domains, a section of poly proline motif and a coiled coil region. Transcription levels of On-CD2AP were detected in nine tissues of healthy Nile tilapia, and the highest expression levels were detected in the spleen and gill. On-CD2AP were significantly up-regulated in thymus, head kidney and brain after infected by Streptococcus agalactiae, as well as in head kidney leukocytes (HKLs) with LPS and LTA stimulation. Moreover, a section conserved pro-rich motif that are responsible for binding of CD2 to CD2AP were found in the CD2 cytoplasmic sequence of Nile tilapia (On-CD2C). A weak interaction between On-CD2AP and On-CD2C was proved by yeast two-hybrid assay. In addition, the recombinant proteins of CD2AP-His (rOn-CD2AP-His) and GST-CD2C (GST-rOn-CD2C) were obtained through prokaryotic expression system. His pull-down assay showed that rOn-CD2AP-His and GST-rOn-CD2C could bind to each other. These findings indicate that CD2AP is crucial in immune response during S.agalactiae infection, and the mechanism of interaction between CD2AP and CD2 is conservative in Nile tilapia.
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Affiliation(s)
- Yuan Li
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, Guangdong, China; Fisheries College of Guangdong Ocean University, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China
| | - Bei Wang
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, Guangdong, China; Fisheries College of Guangdong Ocean University, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
| | - Zhi-Wen Wang
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, Guangdong, China; Fisheries College of Guangdong Ocean University, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China
| | - Yu Huang
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, Guangdong, China; Fisheries College of Guangdong Ocean University, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Ji-Chang Jian
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, Guangdong, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
| | - Yi-Shan Lu
- Shenzhen Institute of Guangdong Ocean University, Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen, 518120, Guangdong, China; Fisheries College of Guangdong Ocean University, Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang), Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, Zhanjiang, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
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6
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Kozlova N, Mennerich D, Samoylenko A, Dimova EY, Koivunen P, Biterova E, Richter K, Hassinen A, Kellokumpu S, Manninen A, Miinalainen I, Glumoff V, Ruddock L, Drobot LB, Kietzmann T. The Pro-Oncogenic Adaptor CIN85 Acts as an Inhibitory Binding Partner of Hypoxia-Inducible Factor Prolyl Hydroxylase 2. Cancer Res 2019; 79:4042-4056. [PMID: 31142511 DOI: 10.1158/0008-5472.can-18-3852] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/17/2019] [Accepted: 05/24/2019] [Indexed: 11/16/2022]
Abstract
The EGFR adaptor protein, CIN85, has been shown to promote breast cancer malignancy and hypoxia-inducible factor (HIF) stability. However, the mechanisms underlying cancer promotion remain ill defined. Here we show that CIN85 is a novel binding partner of the main HIF-prolyl hydroxylase, PHD2, but not of PHD1 or PHD3. Mechanistically, the N-terminal SRC homology 3 domains of CIN85 interacted with the proline-arginine-rich region within the N-terminus of PHD2, thereby inhibiting PHD2 activity and HIF degradation. This activity is essential in vivo, as specific loss of the CIN85-PHD2 interaction in CRISPR/Cas9-edited cells affected growth and migration properties, as well as tumor growth in mice. Overall, we discovered a previously unrecognized tumor growth checkpoint that is regulated by CIN85-PHD2 and uncovered an essential survival function in tumor cells by linking growth factor adaptors with hypoxia signaling. SIGNIFICANCE: This study provides unprecedented evidence for an oxygen-independent mechanism of PHD2 regulation that has important implications in cancer cell survival. GRAPHICAL ABSTRACT: http://cancerres.aacrjournals.org/content/canres/79/16/4042/F1.large.jpg.
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Affiliation(s)
- Nina Kozlova
- Cancer Center at Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.,Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Daniela Mennerich
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Anatoly Samoylenko
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.,Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Elitsa Y Dimova
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.,Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Peppi Koivunen
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland.,Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Ekaterina Biterova
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Kati Richter
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Antti Hassinen
- Institute for Molecular Medicine Finland (FIMM), Helsinki, Finland
| | - Sakari Kellokumpu
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Aki Manninen
- Center for Cell-Matrix Research, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.,Biocenter Oulu, University of Oulu, Oulu, Finland
| | | | - Virpi Glumoff
- The Research Unit of Biomedicine, University of Oulu, Oulu, Finland
| | - Lloyd Ruddock
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland
| | - Lyudmyla Borysivna Drobot
- Laboratory of Cell Signaling, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Thomas Kietzmann
- Faculty of Biochemistry and Molecular Medicine and Biocenter Oulu, University of Oulu, Oulu, Finland. .,Biocenter Oulu, University of Oulu, Oulu, Finland
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7
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Mutso M, Morro AM, Smedberg C, Kasvandik S, Aquilimeba M, Teppor M, Tarve L, Lulla A, Lulla V, Saul S, Thaa B, McInerney GM, Merits A, Varjak M. Mutation of CD2AP and SH3KBP1 Binding Motif in Alphavirus nsP3 Hypervariable Domain Results in Attenuated Virus. Viruses 2018; 10:E226. [PMID: 29702546 PMCID: PMC5977219 DOI: 10.3390/v10050226] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 04/17/2018] [Accepted: 04/20/2018] [Indexed: 12/28/2022] Open
Abstract
Infection by Chikungunya virus (CHIKV) of the Old World alphaviruses (family Togaviridae) in humans can cause arthritis and arthralgia. The virus encodes four non-structural proteins (nsP) (nsP1, nsp2, nsP3 and nsP4) that act as subunits of the virus replicase. These proteins also interact with numerous host proteins and some crucial interactions are mediated by the unstructured C-terminal hypervariable domain (HVD) of nsP3. In this study, a human cell line expressing EGFP tagged with CHIKV nsP3 HVD was established. Using quantitative proteomics, it was found that CHIKV nsP3 HVD can bind cytoskeletal proteins, including CD2AP, SH3KBP1, CAPZA1, CAPZA2 and CAPZB. The interaction with CD2AP was found to be most evident; its binding site was mapped to the second SH3 ligand-like element in nsP3 HVD. Further assessment indicated that CD2AP can bind to nsP3 HVDs of many different New and Old World alphaviruses. Mutation of the short binding element hampered the ability of the virus to establish infection. The mutation also abolished ability of CD2AP to co-localise with nsP3 and replication complexes of CHIKV; the same was observed for Semliki Forest virus (SFV) harbouring a similar mutation. Similar to CD2AP, its homolog SH3KBP1 also bound the identified motif in CHIKV and SFV nsP3.
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Affiliation(s)
- Margit Mutso
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Ainhoa Moliner Morro
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden.
| | - Cecilia Smedberg
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden.
| | - Sergo Kasvandik
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | | | - Mona Teppor
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Liisi Tarve
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Aleksei Lulla
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Valeria Lulla
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Sirle Saul
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Bastian Thaa
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden.
| | - Gerald M McInerney
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden.
| | - Andres Merits
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
| | - Margus Varjak
- Institute of Technology, University of Tartu, 50411 Tartu, Estonia.
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8
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TAGLN2 polymerizes G-actin in a low ionic state but blocks Arp2/3-nucleated actin branching in physiological conditions. Sci Rep 2018; 8:5503. [PMID: 29615809 PMCID: PMC5883021 DOI: 10.1038/s41598-018-23816-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 03/20/2018] [Indexed: 11/12/2022] Open
Abstract
TAGLN is an actin-binding protein family that comprises three isoforms with theorized roles in smooth muscle differentiation, tumour development, lymphocyte activation, and brain chemistry. However, their fundamental characteristics in regulation of the actin-based cytoskeleton are not fully understood. Here we show that TAGLN2 (including TAGLN1 and TAGLN3) extensively nucleates G-actin polymerization under low-salt conditions, where polymerization would be completely suppressed. The calponin homology domain and actin-binding loop are essential to mechanically connect two adjacent G-actins, thereby mediating multimeric interactions. However, TAGLN2 blocked the Arp2/3 complex binding to actin filaments under physiological salt conditions, thereby inhibiting branched actin nucleation. In HeLa and T cells, TAGLN2 enhanced filopodium-like membrane protrusion. Collectively, the dual functional nature of TAGLN2—G-actin polymerization and Arp2/3 complex inhibition—may account for the mechanisms of filopodia development at the edge of Arp2/3-rich lamellipodia in various cell types.
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9
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Schaefer A, van Duijn TJ, Majolee J, Burridge K, Hordijk PL. Endothelial CD2AP Binds the Receptor ICAM-1 To Control Mechanosignaling, Leukocyte Adhesion, and the Route of Leukocyte Diapedesis In Vitro. THE JOURNAL OF IMMUNOLOGY 2017; 198:4823-4836. [PMID: 28484055 DOI: 10.4049/jimmunol.1601987] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 04/12/2017] [Indexed: 12/16/2022]
Abstract
Inflammation is driven by excessive transmigration (diapedesis) of leukocytes from the blood to the tissue across the endothelial cell monolayer that lines blood vessels. Leukocyte adhesion, crawling, and transmigration are regulated by clustering of the endothelial mechanosensitive receptor intercellular adhesion molecule-1 (ICAM-1). Whereas several proteins are known to promote ICAM-1 function, the molecular mechanisms that limit ICAM-1-mediated adhesion to prevent excessive leukocyte transmigration remain unknown. We identify the endothelial actin-binding protein CD2-associated protein (CD2AP) as a novel interaction partner of ICAM-1. Loss of CD2AP stimulates the dynamics of ICAM-1 clustering, which facilitates the formation of ICAM-1 complexes on the endothelial cell surface. Consequently, neutrophil adhesion is increased, but crawling is decreased. In turn, this promotes the neutrophil preference for the transcellular over the paracellular transmigration route. Mechanistically, CD2AP is required for mechanosensitive ICAM-1 downstream signaling toward activation of the PI3K, and recruitment of F-actin and of the actin-branching protein cortactin. Moreover, CD2AP is necessary for ICAM-1-induced Rac1 recruitment and activation. Mechanical force applied on ICAM-1 impairs CD2AP binding to ICAM-1, suggesting that a tension-induced negative feedback loop promotes ICAM-1-mediated neutrophil crawling and paracellular transmigration. To our knowledge, these data show for the first time that the mechanoreceptor ICAM-1 is negatively regulated by an actin-binding adaptor protein, i.e., CD2AP, to allow a balanced and spatiotemporal control of its adhesive function. CD2AP is important in kidney dysfunction that is accompanied by inflammation. Our findings provide a mechanistic basis for the role of CD2AP in inflamed vessels, identifying this adaptor protein as a potential therapeutic target.
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Affiliation(s)
- Antje Schaefer
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066CX, the Netherlands; .,Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599
| | - Trynette J van Duijn
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066CX, the Netherlands
| | - Jisca Majolee
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066CX, the Netherlands
| | - Keith Burridge
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599.,Department of Cell Biology and Physiology and McAllister Heart Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599; and
| | - Peter L Hordijk
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066CX, the Netherlands.,Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam 1098XH, the Netherlands
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10
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Swiatecka-Urban A. Endocytic Trafficking at the Mature Podocyte Slit Diaphragm. Front Pediatr 2017; 5:32. [PMID: 28286744 PMCID: PMC5324021 DOI: 10.3389/fped.2017.00032] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 02/03/2017] [Indexed: 12/16/2022] Open
Abstract
Endocytic trafficking couples cell signaling with the cytoskeletal dynamics by organizing a crosstalk between protein networks in different subcellular compartments. Proteins residing in the plasma membrane are internalized and transported as cargo in endocytic vesicles (i.e., endocytosis). Subsequently, cargo proteins can be delivered to lysosomes for degradation or recycled back to the plasma membrane. The slit diaphragm is a modified tight junction connecting foot processes of the glomerular epithelial cells, podocytes. Signaling at the slit diaphragm plays a critical role in the kidney while its dysfunction leads to glomerular protein loss (proteinuria), manifesting as nephrotic syndrome, a rare condition with an estimated incidence of 2-4 new cases per 100,000 each year. Relatively little is known about the role of endocytic trafficking in podocyte signaling and maintenance of the slit diaphragm integrity. This review will focus on the role of endocytic trafficking at the mature podocyte slit diaphragm.
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Affiliation(s)
- Agnieszka Swiatecka-Urban
- Department of Nephrology, Children's Hospital of Pittsburgh, Pittsburgh, PA, USA; Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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11
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Nagai K, Doi T. CIN85: Implications for the Development of Proteinuria in Diabetic Nephropathy. Diabetes 2016; 65:3532-3534. [PMID: 27879403 DOI: 10.2337/dbi16-0051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Kojiro Nagai
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Toshio Doi
- Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
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12
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Kühn J, Wong LE, Pirkuliyeva S, Schulz K, Schwiegk C, Fünfgeld KG, Keppler S, Batista FD, Urlaub H, Habeck M, Becker S, Griesinger C, Wienands J. The adaptor protein CIN85 assembles intracellular signaling clusters for B cell activation. Sci Signal 2016; 9:ra66. [PMID: 27353366 DOI: 10.1126/scisignal.aad6275] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The adaptor molecule Cbl-interacting protein of 85 kD (CIN85) regulates signaling from a number of cell surface receptors, such as growth factor receptors and antigen receptors on lymphocytes. Because of its multidomain structure, CIN85 is thought to act as a classical adaptor protein that connects functionally distinct components of a given signaling pathway through diverse protein domains. However, we found that in B lymphocytes, CIN85 functions to oligomerize SLP-65, which is the central effector protein of the B cell receptor (BCR). Therefore, CIN85 trimerizes through a carboxyl-terminal, coiled-coil domain. The multiple Src homology 3 (SH3) domains of trimeric CIN85 molecules associated with multiple SLP-65 molecules, which recruited further CIN85 trimers, thereby perpetuating the oligomerization process. Formation of this oligomeric signaling complex in resting B cells rendered the cells poised for the efficient initiation of intracellular signaling upon BCR stimulation. Our data suggest that the functionality of signaling cascades does not rely solely on the qualitative linkage of their various components but requires a critical number of effectors to become concentrated in signaling complexes.
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Affiliation(s)
- Julius Kühn
- Institute of Cellular and Molecular Immunology, Georg August University of Göttingen, Humboldtallee 34, 37073 Göttingen, Germany
| | - Leo E Wong
- Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Sona Pirkuliyeva
- Institute of Cellular and Molecular Immunology, Georg August University of Göttingen, Humboldtallee 34, 37073 Göttingen, Germany
| | - Kathrin Schulz
- Institute of Cellular and Molecular Immunology, Georg August University of Göttingen, Humboldtallee 34, 37073 Göttingen, Germany
| | - Claudia Schwiegk
- Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Kevser Gencalp Fünfgeld
- Department for Cellular Logistic, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Selina Keppler
- Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, Lincoln's Inn Fields 44, London WC2A 3LY, UK
| | - Facundo D Batista
- Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, Lincoln's Inn Fields 44, London WC2A 3LY, UK
| | - Henning Urlaub
- Bioanalytical Mass Spectrometry, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany. Bioanalytics Group, Institute for Clinical Chemistry, University Medical Center, Robert-Koch-Strasse 40, 37075 Göttingen, Germany
| | - Michael Habeck
- Statistical Inverse Problems in Biophysics, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Stefan Becker
- Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
| | - Christian Griesinger
- Department of NMR-based Structural Biology, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany.
| | - Jürgen Wienands
- Institute of Cellular and Molecular Immunology, Georg August University of Göttingen, Humboldtallee 34, 37073 Göttingen, Germany.
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13
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Xiao Y, Wu W, Gao J, Smith N, Burkard C, Xia D, Zhang M, Wang C, Archibald A, Digard P, Zhou EM, Hiscox JA. Characterization of the Interactome of the Porcine Reproductive and Respiratory Syndrome Virus Nonstructural Protein 2 Reveals the Hyper Variable Region as a Binding Platform for Association with 14–3–3 Proteins. J Proteome Res 2016; 15:1388-401. [DOI: 10.1021/acs.jproteome.5b00396] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yihong Xiao
- Department
of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool L3 5RF, U.K
- Department
of Basic Veterinary Medicine, College of Animal Science and Veterinary
Medicine, Shandong Agricultural University, Tai’an 271018, P.R. China
| | - Weining Wu
- Department
of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool L3 5RF, U.K
| | - Jiming Gao
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, P.R. China
| | - Nikki Smith
- The
Roslin Institute, University of Edinburgh, Edinburgh EH25 9RG, U.K
| | - Christine Burkard
- The
Roslin Institute, University of Edinburgh, Edinburgh EH25 9RG, U.K
| | - Dong Xia
- Department
of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool L3 5RF, U.K
| | - Minxia Zhang
- Department
of Basic Veterinary Medicine, College of Animal Science and Veterinary
Medicine, Shandong Agricultural University, Tai’an 271018, P.R. China
| | - Chengbao Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, P.R. China
| | - Alan Archibald
- The
Roslin Institute, University of Edinburgh, Edinburgh EH25 9RG, U.K
| | - Paul Digard
- The
Roslin Institute, University of Edinburgh, Edinburgh EH25 9RG, U.K
| | - En-min Zhou
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, P.R. China
| | - Julian A. Hiscox
- Department
of Infection Biology, Institute of Infection and Global Health, University of Liverpool, Liverpool L3 5RF, U.K
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, P.R. China
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14
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Long PA, Larsen BT, Evans JM, Olson TM. Exome Sequencing Identifies Pathogenic and Modifier Mutations in a Child With Sporadic Dilated Cardiomyopathy. J Am Heart Assoc 2015; 4:JAHA.115.002443. [PMID: 26656454 PMCID: PMC4845292 DOI: 10.1161/jaha.115.002443] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Background Idiopathic dilated cardiomyopathy (DCM) is typically diagnosed in adulthood, yet familial cases exhibit variable age‐dependent penetrance and a subset of patients develop sporadic DCM in childhood. We sought to discover the molecular basis of sporadic DCM in an 11‐year‐old female with severe heart failure necessitating cardiac transplantation. Methods and Results Parental echocardiograms excluded asymptomatic DCM. Whole exome sequencing was performed on the family trio and filtered for rare, deleterious, recessive, and de novo variants. Of the 8 candidate genes identified, only 2 had a role in cardiac physiology. A de novo missense mutation in TNNT2 was identified, previously reported and functionally validated in familial DCM with markedly variable penetrance. Additionally, recessive compound heterozygous truncating mutations were identified in XIRP2, a member of the ancient Xin gene family, which governs intercalated disc (ICD) maturation. Histomorphological analysis of explanted heart tissue revealed misregistration, mislocalization, and shortening of ICDs, findings similar to Xirp2−/− mice. Conclusions The synergistic effects of TNNT2 and XIRP2 mutations, resulting in perturbed sarcomeric force generation and transmission, respectively, would account for an early‐onset heart failure phenotype. Whereas the importance of Xin proteins in cardiac development has been well established in animal models, this study implicates XIRP2 as a novel modifier gene in the pathogenesis of DCM.
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Affiliation(s)
- Pamela A Long
- Mayo Graduate School, Molecular Pharmacology and Experimental Therapeutics Track, Mayo Clinic, Rochester, MN (P.A.L.) Cardiovascular Genetics Research Laboratory, Mayo Clinic, Rochester, MN (P.A.L., T.M.O.)
| | - Brandon T Larsen
- Department of Pathology, University of Arizona Medical Center, Tucson, AZ (B.T.L.)
| | - Jared M Evans
- Division of Biomedical Statistics and Informatics, Department of Health Sciences Research, Mayo Clinic, Rochester, MN (J.M.E.)
| | - Timothy M Olson
- Cardiovascular Genetics Research Laboratory, Mayo Clinic, Rochester, MN (P.A.L., T.M.O.) Division of Pediatric Cardiology, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN (T.M.O.) Division of Cardiovascular Diseases, Department of Internal Medicine, Mayo Clinic, Rochester, MN (T.M.O.)
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15
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Rouka E, Simister PC, Janning M, Kumbrink J, Konstantinou T, Muniz JRC, Joshi D, O'Reilly N, Volkmer R, Ritter B, Knapp S, von Delft F, Kirsch KH, Feller SM. Differential Recognition Preferences of the Three Src Homology 3 (SH3) Domains from the Adaptor CD2-associated Protein (CD2AP) and Direct Association with Ras and Rab Interactor 3 (RIN3). J Biol Chem 2015; 290:25275-92. [PMID: 26296892 DOI: 10.1074/jbc.m115.637207] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Indexed: 11/06/2022] Open
Abstract
CD2AP is an adaptor protein involved in membrane trafficking, with essential roles in maintaining podocyte function within the kidney glomerulus. CD2AP contains three Src homology 3 (SH3) domains that mediate multiple protein-protein interactions. However, a detailed comparison of the molecular binding preferences of each SH3 remained unexplored, as well as the discovery of novel interactors. Thus, we studied the binding properties of each SH3 domain to the known interactor Casitas B-lineage lymphoma protein (c-CBL), conducted a peptide array screen based on the recognition motif PxPxPR and identified 40 known or novel candidate binding proteins, such as RIN3, a RAB5-activating guanine nucleotide exchange factor. CD2AP SH3 domains 1 and 2 generally bound with similar characteristics and specificities, whereas the SH3-3 domain bound more weakly to most peptide ligands tested yet recognized an unusually extended sequence in ALG-2-interacting protein X (ALIX). RIN3 peptide scanning arrays revealed two CD2AP binding sites, recognized by all three SH3 domains, but SH3-3 appeared non-functional in precipitation experiments. RIN3 recruited CD2AP to RAB5a-positive early endosomes via these interaction sites. Permutation arrays and isothermal titration calorimetry data showed that the preferred binding motif is Px(P/A)xPR. Two high-resolution crystal structures (1.65 and 1.11 Å) of CD2AP SH3-1 and SH3-2 solved in complex with RIN3 epitopes 1 and 2, respectively, indicated that another extended motif is relevant in epitope 2. In conclusion, we have discovered novel interaction candidates for CD2AP and characterized subtle yet significant differences in the recognition preferences of its three SH3 domains for c-CBL, ALIX, and RIN3.
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Affiliation(s)
- Evgenia Rouka
- From the Weatherall Institute of Molecular Medicine, Department of Oncology, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Philip C Simister
- From the Weatherall Institute of Molecular Medicine, Department of Oncology, University of Oxford, Oxford OX3 9DS, United Kingdom,
| | - Melanie Janning
- From the Weatherall Institute of Molecular Medicine, Department of Oncology, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Joerg Kumbrink
- the Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts 02118
| | - Tassos Konstantinou
- From the Weatherall Institute of Molecular Medicine, Department of Oncology, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - João R C Muniz
- the Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Dhira Joshi
- the Peptide Chemistry Laboratory, London Research Institute Cancer Research UK, London WC2A 3LY, United Kingdom
| | - Nicola O'Reilly
- the Peptide Chemistry Laboratory, London Research Institute Cancer Research UK, London WC2A 3LY, United Kingdom
| | - Rudolf Volkmer
- the Institute of Medical Immunology, Charité-Universitätsmedizin Berlin, 10115 Berlin, Germany
| | - Brigitte Ritter
- the Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts 02118
| | - Stefan Knapp
- the Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom
| | - Frank von Delft
- the Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX3 7DQ, United Kingdom, the Diamond Light Source Ltd., Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom, and the Department of Biochemistry, University of Johannesburg, Auckland Park 2006, South Africa
| | - Kathrin H Kirsch
- the Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts 02118
| | - Stephan M Feller
- From the Weatherall Institute of Molecular Medicine, Department of Oncology, University of Oxford, Oxford OX3 9DS, United Kingdom, the Institute of Molecular Medicine, Martin Luther University Halle-Wittenberg, D-06120 Halle, Germany,
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16
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Scholz R, Imami K, Scott NE, Trimble WS, Foster LJ, Finlay BB. Novel Host Proteins and Signaling Pathways in Enteropathogenic E. coli Pathogenesis Identified by Global Phosphoproteome Analysis. Mol Cell Proteomics 2015; 14:1927-45. [PMID: 25944883 DOI: 10.1074/mcp.m114.046847] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Indexed: 12/21/2022] Open
Abstract
Enteropathogenic Escherichia coli (EPEC) uses a type III secretion system (T3SS) to directly translocate effector proteins into host cells where they play a pivotal role in subverting host cell signaling needed for disease. However, our knowledge of how EPEC affects host protein phosphorylation is limited to a few individual protein studies. We employed a quantitative proteomics approach to globally map alterations in the host phosphoproteome during EPEC infection. By characterizing host phosphorylation events at various time points throughout infection, we examined how EPEC dynamically impacts the host phosphoproteome over time. This experimental setup also enabled identification of T3SS-dependent and -independent changes in host phosphorylation. Specifically, T3SS-regulated events affected various cellular processes that are known EPEC targets, including cytoskeletal organization, immune signaling, and intracellular trafficking. However, the involvement of phosphorylation in these events has thus far been poorly studied. We confirmed the MAPK family as an established key host player, showed its central role in signal transduction during EPEC infection, and extended the repertoire of known signaling hubs with previously unrecognized proteins, including TPD52, CIN85, EPHA2, and HSP27. We identified altered phosphorylation of known EPEC targets, such as cofilin, where the involvement of phosphorylation has so far been undefined, thus providing novel mechanistic insights into the roles of these proteins in EPEC infection. An overlap of regulated proteins, especially those that are cytoskeleton-associated, was observed when compared with the phosphoproteome of Shigella-infected cells. We determined the biological relevance of the phosphorylation of a novel protein in EPEC pathogenesis, septin-9 (SEPT9). Both siRNA knockdown and a phosphorylation-impaired SEPT9 mutant decreased bacterial adherence and EPEC-mediated cell death. In contrast, a phosphorylation-mimicking SEPT9 mutant rescued these effects. Collectively, this study provides the first global analysis of phosphorylation-mediated processes during infection with an extracellular, diarrheagenic bacterial pathogen.
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Affiliation(s)
| | - Koshi Imami
- §Centre for High-Throughput Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Nichollas E Scott
- §Centre for High-Throughput Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - William S Trimble
- ¶Cell Biology Program, Hospital for Sick Children and ‖Department of Biochemistry, University of Toronto, Toronto, Ontario M5G 1X8, Canada
| | - Leonard J Foster
- §Centre for High-Throughput Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada, **Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada, and
| | - B Brett Finlay
- From the ‡Michael Smith Laboratories and **Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada, and ¶¶Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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17
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Liao F, Jiang H, Srivatsan S, Xiao Q, Lefton KB, Yamada K, Mahan TE, Lee JM, Shaw AS, Holtzman DM. Effects of CD2-associated protein deficiency on amyloid-β in neuroblastoma cells and in an APP transgenic mouse model. Mol Neurodegener 2015; 10:12. [PMID: 25887956 PMCID: PMC4374406 DOI: 10.1186/s13024-015-0006-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Accepted: 02/26/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND CD2-associated protein (CD2AP) is an SH3-containing scaffold adaptor protein which regulates the actin cytoskeleton. Recently, CD2AP was identified as a genetic risk factor for Alzheimer's disease (AD) by several genome-wide association studies. One of the hallmarks of AD is the accumulation of aggregated forms of Amyloid-β (Aβ) in the brain. In humans, CD2AP AD susceptibility locus (rs9349407) is associated with an increased plaque burden. Aβ production is highly regulated by endocytosis and is influenced by lysosomal function. Lysosomal trafficking is influenced by CD2AP. In this study, we decreased CD2AP levels in N2a neuroblastoma cultures and PS1APP mice and analyzed Aβ levels and plaque burden. RESULTS Our data show that suppressing CD2AP expression using shRNA in N2a-APP695 cells results in decreased cell membrane amyloid precursor protein, decreased Aβ release and a lower Aβ42/Aβ40 ratio. CD2AP protein is expressed in the brain as detected by western blot, and the expression level is dependent on gene dosage. In 1-month old PS1APP mice, complete loss of CD2AP in brain resulted in a decreased Aβ42/Aβ40 ratio in brain tissue lysates while there was no effect on Aβ deposition or accumulation in PS1APP mice expressing one copy of CD2AP. CONCLUSION CD2-Associated Protein affects Aβ levels and Aβ42/Aβ40 ratio in vitro. The effect of CD2-Associated Protein on Aβ metabolism is subtle in vivo.
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Affiliation(s)
- Fan Liao
- Department of Neurology, Hope Center for Neurological Disorders, Charles F. and Joanne Knight Alzheimer's Disease Research Center, Washington University School of Medicine, St. Louis, MO, USA.
| | - Hong Jiang
- Department of Neurology, Hope Center for Neurological Disorders, Charles F. and Joanne Knight Alzheimer's Disease Research Center, Washington University School of Medicine, St. Louis, MO, USA.
| | - Subhashini Srivatsan
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.
| | - Qingli Xiao
- Department of Neurology, Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, USA.
| | - Katheryn B Lefton
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA.
| | - Kaoru Yamada
- Department of Neuropathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
| | - Thomas E Mahan
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA.
| | - Jin-Moo Lee
- Department of Neurology, Hope Center for Neurological Disorders, Washington University School of Medicine, St. Louis, MO, USA.
| | - Andrey S Shaw
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.
| | - David M Holtzman
- Department of Neurology, Hope Center for Neurological Disorders, Charles F. and Joanne Knight Alzheimer's Disease Research Center, Washington University School of Medicine, St. Louis, MO, USA.
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18
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Panni S, Salvioli S, Santonico E, Langone F, Storino F, Altilia S, Franceschi C, Cesareni G, Castagnoli L. The adapter protein CD2AP binds to p53 protein in the cytoplasm and can discriminate its polymorphic variants P72R. J Biochem 2014; 157:101-11. [PMID: 25261582 DOI: 10.1093/jb/mvu059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Proline-rich motifs are widely distributed in eukaryotic proteomes and are usually involved in the assembly of functional complexes through interaction with specific binding modules. The tumour-suppressor p53 protein presents a proline-rich region that is crucial for regulating apoptosis by connecting the p53 with a complex protein network. In humans, a common polymorphism determines the identity of residue 72, either proline or arginine, and affects the features of the motifs present in the polyproline domain. The two isoforms have different biochemical properties and markedly influence cancer onset and progression. In this article, we analyse the binding of the p53 proline-rich region with a pool of selected polyproline binding domains (i.e. SH3 and WW), and we present the first demonstration that the purified SH3 domains of the CD2AP/Cin85 protein family are able to directly bind the p53 protein, and to discriminate between the two polymorphic variants P72R.
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Affiliation(s)
- Simona Panni
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Stefano Salvioli
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Elena Santonico
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Francesca Langone
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Francesca Storino
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Serena Altilia
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Claudio Franceschi
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Gianni Cesareni
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
| | - Luisa Castagnoli
- Department DiBEST, University of Calabria, Rende, 87036, Italy; DIMES, Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Bologna 40126, Italy; CIG, Interdepartmental Center "Luigi Galvani", University of Bologna, Bologna 40126, Italy; Department of Biology, University of Rome Tor Vergata, Rome 00100, Italy; and Istituto Ricovero e Cura a Carattere Scientifico, Fondazione Santa Lucia, Rome, 00100, Italy
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Edwards M, Zwolak A, Schafer DA, Sept D, Dominguez R, Cooper JA. Capping protein regulators fine-tune actin assembly dynamics. Nat Rev Mol Cell Biol 2014; 15:677-89. [PMID: 25207437 DOI: 10.1038/nrm3869] [Citation(s) in RCA: 191] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Capping protein (CP) binds the fast growing barbed end of the actin filament and regulates actin assembly by blocking the addition and loss of actin subunits. Recent studies provide new insights into how CP and barbed-end capping are regulated. Filament elongation factors, such as formins and ENA/VASP (enabled/vasodilator-stimulated phosphoprotein), indirectly regulate CP by competing with CP for binding to the barbed end, whereas other molecules, including V-1 and phospholipids, directly bind to CP and sterically block its interaction with the filament. In addition, a diverse and unrelated group of proteins interact with CP through a conserved 'capping protein interaction' (CPI) motif. These proteins, including CARMIL (capping protein, ARP2/3 and myosin I linker), CD2AP (CD2-associated protein) and the WASH (WASP and SCAR homologue) complex subunit FAM21, recruit CP to specific subcellular locations and modulate its actin-capping activity via allosteric effects.
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Affiliation(s)
- Marc Edwards
- Department of Cell Biology and Physiology, Washington University, St. Louis, Missouri 63110, USA
| | - Adam Zwolak
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Dorothy A Schafer
- Departments of Biology and Cell Biology, University of Virginia, Charlottesville, Virginia 22904, USA
| | - David Sept
- Department of Biomedical Engineering and Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Roberto Dominguez
- Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - John A Cooper
- Department of Cell Biology and Physiology, Washington University, St. Louis, Missouri 63110, USA
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20
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Tang VW, Brieher WM. FSGS3/CD2AP is a barbed-end capping protein that stabilizes actin and strengthens adherens junctions. ACTA ACUST UNITED AC 2014; 203:815-33. [PMID: 24322428 PMCID: PMC3857477 DOI: 10.1083/jcb.201304143] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
By combining in vitro reconstitution biochemistry with a cross-linking approach, we have identified focal segmental glomerulosclerosis 3/CD2-associated protein (FSGS3/CD2AP) as a novel actin barbed-end capping protein responsible for actin stability at the adherens junction. FSGS3/CD2AP colocalizes with E-cadherin and α-actinin-4 at the apical junction in polarized Madin-Darby canine kidney (MDCK) cells. Knockdown of FSGS3/CD2AP compromised actin stability and decreased actin accumulation at the adherens junction. Using a novel apparatus to apply mechanical stress to cell-cell junctions, we showed that knockdown of FSGS3/CD2AP compromised adhesive strength, resulting in tearing between cells and disruption of barrier function. Our results reveal a novel function of FSGS3/CD2AP and a previously unrecognized role of barbed-end capping in junctional actin dynamics. Our study underscores the complexity of actin regulation at cell-cell contacts that involves actin activators, inhibitors, and stabilizers to control adhesive strength, epithelial behavior, and permeability barrier integrity.
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Affiliation(s)
- Vivian W Tang
- Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, IL 61820
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21
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Clioquinol promotes the degradation of metal-dependent amyloid-β (Aβ) oligomers to restore endocytosis and ameliorate Aβ toxicity. Proc Natl Acad Sci U S A 2014; 111:4013-8. [PMID: 24591589 DOI: 10.1073/pnas.1402228111] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Alzheimer's disease (AD) is a common, progressive neurodegenerative disorder without effective disease-modifying therapies. The accumulation of amyloid-β peptide (Aβ) is associated with AD. However, identifying new compounds that antagonize the underlying cellular pathologies caused by Aβ has been hindered by a lack of cellular models amenable to high-throughput chemical screening. To address this gap, we use a robust and scalable yeast model of Aβ toxicity where the Aβ peptide transits through the secretory and endocytic compartments as it does in neurons. The pathogenic Aβ 1-42 peptide forms more oligomers and is more toxic than Aβ 1-40 and genome-wide genetic screens identified genes that are known risk factors for AD. Here, we report an unbiased screen of ∼140,000 compounds for rescue of Aβ toxicity. Of ∼30 hits, several were 8-hydroxyquinolines (8-OHQs). Clioquinol (CQ), an 8-OHQ previously reported to reduce Aβ burden, restore metal homeostasis, and improve cognition in mouse AD models, was also effective and rescued the toxicity of Aβ secreted from glutamatergic neurons in Caenorhabditis elegans. In yeast, CQ dramatically reduced Aβ peptide levels in a copper-dependent manner by increasing degradation, ultimately restoring endocytic function. This mirrored its effects on copper-dependent oligomer formation in vitro, which was also reversed by CQ. This unbiased screen indicates that copper-dependent Aβ oligomer formation contributes to Aβ toxicity within the secretory/endosomal pathways where it can be targeted with selective metal binding compounds. Establishing the ability of the Aβ yeast model to identify disease-relevant compounds supports its further exploitation as a validated early discovery platform.
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22
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Srivatsan S, Swiecki M, Otero K, Cella M, Shaw AS. CD2-associated protein regulates plasmacytoid dendritic cell migration, but is dispensable for their development and cytokine production. THE JOURNAL OF IMMUNOLOGY 2013; 191:5933-40. [PMID: 24218450 DOI: 10.4049/jimmunol.1300454] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Plasmacytoid dendritic cells (pDCs) are a dendritic cell subset that secrete type I IFNs in response to microbial stimuli. The scaffold protein, CD2-associated protein (CD2AP), is a marker of human pDCs as it is highly expressed in this cell type. Recently, in human pDCs, decreased CD2AP expression appeared to enhance the production of type I IFNs via an inhibitory receptor-induced signaling cascade. In this study, we sought to determine the role of CD2AP in murine pDCs using CD2AP knockout (KO) mice. CD2AP was dispensable for the development of pDCs and for the upregulation of activation markers following stimulation. Loss of CD2AP expression did not affect the production of type I IFNs stimulated by TLR ligation, and only slightly impaired type I IFN production when inhibitory pathways were engaged in vitro. This was also confirmed by showing that CD2AP deficiency did not influence type I IFN production by pDCs in vivo. Because CD2AP plays a role in regulating actin dynamics, we examined the actin cytoskeleton in pDCs and found that activated CD2AP KO pDCs had significantly higher levels of actin polymerization than wild-type pDCs. Using two different inflammation models, we found that CD2AP KO pDCs have a defect in lymph node migration, correlating with the defects in actin dynamics. Our work excludes a role for CD2AP in the regulation of type I IFNs in pDCs, and suggests that the major function of CD2AP is on the actin cytoskeleton, affecting migration to local lymph nodes under conditions of inflammation.
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Affiliation(s)
- Subhashini Srivatsan
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
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23
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Sato S, Zhao Y, Imai M, Simister PC, Feller SM, Trackman PC, Kirsch KH, Sonenshein GE. Inhibition of CIN85-mediated invasion by a novel SH3 domain binding motif in the lysyl oxidase propeptide. PLoS One 2013; 8:e77288. [PMID: 24167568 PMCID: PMC3805583 DOI: 10.1371/journal.pone.0077288] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Accepted: 08/30/2013] [Indexed: 12/24/2022] Open
Abstract
The lysyl oxidase gene inhibits Ras signaling in transformed fibroblasts and breast cancer cells. Its activity was mapped to the 162 amino acid propeptide domain (LOX-PP) of the lysyl oxidase precursor protein. LOX-PP inhibited the Her-2/Ras signaling axis in breast cancer cells, and reduced the Her-2-driven breast tumor burden in a xenograft model. Since its mechanism of action is largely unknown, co-affinity-purification/mass spectrometry was performed and the “Cbl-interacting protein of 85-kDa” (CIN85) identified as an associating protein. CIN85 is an SH3-containing adapter protein that is overexpressed in invasive breast cancers. The CIN85 SH3 domains interact with c-Cbl, an E3 ubiquitin ligase, via an unconventional PxxxPR ligand sequence, with the highest affinity displayed by the SH3-B domain. Interaction with CIN85 recruits c-Cbl to the AMAP1 complex where its ubiquitination activity is necessary for cancer cells to develop an invasive phenotype and to degrade the matrix. Direct interaction of LOX-PP with CIN85 was confirmed using co-immunoprecipitation analysis of lysates from breast cancer cells and of purified expressed proteins. CIN85 interaction with c-Cbl was reduced by LOX-PP. Domain specific CIN85 regions and deletion mutants of LOX-PP were prepared and used to map the sites of interaction to the SH3-B domain of CIN85 and to an epitope encompassing amino acids 111 to 116 of LOX-PP. Specific LOX-PP point mutant proteins P111A and R116A failed to interact with CIN85 or to compete for CIN85 binding with c-Cbl. Structural modeling identified a new atypical PxpxxRh SH3-binding motif in this region of LOX-PP. The LOX-PP interaction with CIN85 was shown to reduce the invasive phenotype of breast cancer cells, including their ability to degrade the surrounding extracellular matrix and for Matrigel outgrowth. Thus, LOX-PP interacts with CIN85 via a novel SH3-binding motif and this association reduces CIN85-promoted invasion by breast cancer cells.
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Affiliation(s)
- Seiichi Sato
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, United States of America
| | - Yingshe Zhao
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Misa Imai
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, United States of America
| | - Philip C. Simister
- Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
| | - Stephan M. Feller
- Department of Oncology, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, United Kingdom
- Section Tumor Biology, Institute of Molecular Medicine, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Philip C. Trackman
- Division of Oral Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, United States of America
| | - Kathrin H. Kirsch
- Department of Biochemistry, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Gail E. Sonenshein
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, United States of America
- * E-mail:
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24
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Solovyev AG, Minina EA, Makarova SS, Erokhina TN, Makarov VV, Kaplan IB, Kopertekh L, Schiemann J, Richert-Pöggeler KR, Morozov SY. Subcellular localization and self-interaction of plant-specific Nt-4/1 protein. Biochimie 2013; 95:1360-70. [PMID: 23499290 DOI: 10.1016/j.biochi.2013.02.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 02/26/2013] [Indexed: 11/26/2022]
Abstract
The Nicotiana tabacum Nt-4/1 protein is a plant-specific protein of unknown function. Analysis of bacterially expressed Nt-4/1 protein in vitro revealed that the protein secondary structure is mostly alpha-helical and suggested that it could consist of three structural domains. Earlier studies of At-4/1, the Arabidopsis thaliana-encoded ortholog of Nt-4/1, demonstrated that GFP-fused At-4/1 was capable of polar localization in plant cells, association with plasmodesmata, and cell-to-cell transport. Together with the At-4/1 ability to interact with a plant virus movement protein, these data supported the hypothesis of the At-4/1 protein involvement in viral transport through plasmodesmata. Studies of the Nt-4/1-GFP fusion protein reported in this paper revealed that the protein was localized to cytoplasmic bodies, which were co-aligned with actin filaments and capable of actin-dependent intracellular movement. The Nt-4/1-GFP bodies, being non-membrane structures, were found in association with the plasma membrane, the tubular endoplasmic reticulum and endosome-like structures. Bimolecular fluorescence complementation experiments and inhibition of nuclear export showed that the Nt-4/1 protein was capable of nuclear-cytoplasmic transport. The nuclear export signal (NES) was identified in the Nt-4/1 protein by site-directed mutagenesis. The Nt-4/1 NES mutant was localized to the nucleoplasm forming spherical bodies. Immunogold labeling and electron microscopy of cytoplasmic Nt-4/1-containing bodies and nuclear structures containing the Nt-4/1 NES mutant revealed differences in their fine structure. In mammalian cells, Nt-4/1-GFP formed cytoplasmic spherical bodies similar to those found for the Nt-4/1 NES mutant in plant cell nuclei. Using dynamic laser light scattering and electron microscopy, the Nt-4/1 protein was found to form multimeric complexes in vitro.
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Affiliation(s)
- A G Solovyev
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Chochlova Str. 1, 119992 Moscow, Russia
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25
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Eikenes ÅH, Brech A, Stenmark H, Haglund K. Spatiotemporal control of Cindr at ring canals during incomplete cytokinesis in the Drosophila male germline. Dev Biol 2013; 377:9-20. [PMID: 23499247 DOI: 10.1016/j.ydbio.2013.02.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 02/25/2013] [Accepted: 02/26/2013] [Indexed: 01/08/2023]
Abstract
During male and female gametogenesis in species ranging from insects to mammals, germ cell cyst formation by incomplete cytokinesis involves the stabilization of cleavage furrows and the formation of stable intercellular bridges called ring canals. Accurate regulation of incomplete cytokinesis is required for both female and male fertility in Drosophila melanogaster. Nevertheless, the molecular mechanisms controlling complete versus incomplete cytokinesis are largely unknown. Here, we show that the scaffold protein Cindr is a novel component of both mitotic and meiotic ring canals during Drosophila spermatogenesis. Strikingly, unlike other male germline ring canal components, including Anillin and Pavarotti, Cindr and contractile ring F-actin dissociate from mitotic ring canals and translocate to the fusome upon completion of the mitotic germ cell divisions. We provide evidence that the loss of Cindr from mitotic ring canals is coordinated by signals that mediate the transition from germ cell mitosis to differentiation. Interestingly, Cindr loss from ring canals coincides with completion of the mitotic germ cell divisions in both Drosophila females and males, thus marking a common step of gametogenesis. We also show that Cindr co-localizes with Anillin at mitotic and meiotic ring canals and is recruited to the contractile ring by Anillin during male germ cell meiotic cytokinesis. Taken together, our analyses reveal a key step of incomplete cytokinesis at the endpoint of the mitotic germ cell divisions in D. melanogaster.
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Affiliation(s)
- Åsmund H Eikenes
- Department of Biochemistry, Institute for Cancer Research, Oslo University Hospital, Montebello, Oslo, Norway
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26
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Swiatecka-Urban A. Membrane trafficking in podocyte health and disease. Pediatr Nephrol 2013; 28:1723-37. [PMID: 22932996 PMCID: PMC3578983 DOI: 10.1007/s00467-012-2281-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 07/19/2012] [Accepted: 07/20/2012] [Indexed: 12/21/2022]
Abstract
Podocytes are highly specialized epithelial cells localized in the kidney glomerulus. The distinct cell signaling events and unique cytoskeletal architecture tailor podocytes to withstand changes in hydrostatic pressure during glomerular filtration. Alteration of glomerular filtration leads to kidney disease and frequently manifests with proteinuria. It has been increasingly recognized that cell signaling and cytoskeletal dynamics are coupled more tightly to membrane trafficking than previously thought. Membrane trafficking coordinates the cross-talk between protein networks and signaling cascades in a spatially and temporally organized fashion and may be viewed as a communication highway between the cell exterior and interior. Membrane trafficking involves transport of cargo from the plasma membrane to the cell interior (i.e., endocytosis) followed by cargo trafficking to lysosomes for degradation or to the plasma membrane for recycling. Yet, recent studies indicate that the conventional classification does not fully reflect the complex and versatile nature of membrane trafficking. While the increasing complexity of elaborate protein scaffolds and signaling cascades is being recognized in podocytes, the role of membrane trafficking is less well understood. This review will focus on the role of membrane trafficking in podocyte health and disease.
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27
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Abstract
Podocytes are highly differentiated and polarized epithelial cells located on the visceral side of the glomerulus. They form an indispensable component of the glomerular filter, the slit diaphragm, formed by several transmembrane proteins and adaptor molecules. Disruption of the slit diaphragm can lead to massive proteinuria and nephrotic syndrome in mice and humans. CD2AP is an adaptor protein that is important for the maintenance of the slit diaphragm. Together with its paralogue, CIN85, CD2AP belongs to a family of adaptor proteins that are primarily described as being involved in endocytosis and downregulation of receptor tyrosine kinase activity. We have shown that full-length CIN85 is upregulated in podocytes in the absence of CD2AP, whereas in wild-type cells, full-length CIN85 is not detectable. In this study, we show that full-length CIN85 is postranslationally modified by SUMOylation in wild-type podocytes. We can demonstrate that CIN85 is SUMOylated by SUMO-1, -2, and -3 and that SUMOylation is enhanced in the presence of CD2AP. Conversion of lysine 598 to arginine completely abolishes SUMOylation and leads to increased binding of CIN85 to nephrin. Our results indicate a novel role for CD2AP in regulating posttranslational modification of CIN85.
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28
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Treusch S, Hamamichi S, Goodman JL, Matlack KES, Chung CY, Baru V, Shulman JM, Parrado A, Bevis BJ, Valastyan JS, Han H, Lindhagen-Persson M, Reiman EM, Evans DA, Bennett DA, Olofsson A, DeJager PL, Tanzi RE, Caldwell KA, Caldwell GA, Lindquist S. Functional links between Aβ toxicity, endocytic trafficking, and Alzheimer's disease risk factors in yeast. Science 2011; 334:1241-5. [PMID: 22033521 PMCID: PMC3281757 DOI: 10.1126/science.1213210] [Citation(s) in RCA: 274] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Aβ (beta-amyloid peptide) is an important contributor to Alzheimer's disease (AD). We modeled Aβ toxicity in yeast by directing the peptide to the secretory pathway. A genome-wide screen for toxicity modifiers identified the yeast homolog of phosphatidylinositol binding clathrin assembly protein (PICALM) and other endocytic factors connected to AD whose relationship to Aβ was previously unknown. The factors identified in yeast modified Aβ toxicity in glutamatergic neurons of Caenorhabditis elegans and in primary rat cortical neurons. In yeast, Aβ impaired the endocytic trafficking of a plasma membrane receptor, which was ameliorated by endocytic pathway factors identified in the yeast screen. Thus, links between Aβ, endocytosis, and human AD risk factors can be ascertained with yeast as a model system.
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Affiliation(s)
- Sebastian Treusch
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA
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29
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Kremerskothen J, Stölting M, Wiesner C, Korb-Pap A, van Vliet V, Linder S, Huber TB, Rottiers P, Reuzeau E, Genot E, Pavenstädt H. Zona occludens proteins modulate podosome formation and function. FASEB J 2010; 25:505-14. [PMID: 20930113 DOI: 10.1096/fj.10-155598] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Podosomes are highly dynamic structures that are involved in cell adhesion and extracellular matrix remodeling. They present as intracellular columns composed of an actin-rich core region and a surrounding ring-like structure containing focal adhesion proteins, actin binders as well as cell signaling molecules. A key player in podosome biogenesis is the scaffolding protein cortactin, which is thought to control actin assembly at the core region. We show that the zona occludens protein 1 (ZO-1), a pivotal tight junction protein and known binding partner of cortactin, is a component of podosomes. In the smooth muscle cell line A7r5, phorbol ester treatment induced a rapid relocation of ZO-1 from the cell cortex and cytosolic pools toward newly formed podosomes. Podosomal localization was also observed for the known ZO-1-binding proteins l-afadin, α-catenin, and phospho-connexin 43. Truncation studies revealed that the actin-binding domain but not the association with cortactin is necessary for ZO-1 recruitment to podosomes. Moreover, impaired ZO-1 expression leads to significantly reduced podosome formation and concomitant decreased matrix degradation at podosomes. Our findings demonstrate that besides their known function in tight junction assembly and intercellular communication, zona occludens proteins and their binding partners may play a novel role in podosome formation and associated function, thus regulating cell adhesion and matrix remodeling.
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Affiliation(s)
- Joachim Kremerskothen
- Department for Molecular Nephrology, Internal Medicine D, University Clinic Münster, Domagkstrasse 3a, Münster, Germany 48149.
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30
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Ma Y, Ye F, Xie X, Zhou C, Lu W. Significance of PTPRZ1 and CIN85 expression in cervical carcinoma. Arch Gynecol Obstet 2010; 284:699-704. [PMID: 20882291 DOI: 10.1007/s00404-010-1693-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 09/13/2010] [Indexed: 11/29/2022]
Abstract
PURPOSE To investigate PTPRZ1 and CIN85 expression and their significance in cervical carcinoma. METHODS The expression of PTPRZ1 and CIN85 was detected by immunohistochemistry and the association between PTPRZ1 and CIN85 expression and clinical pathological variables were analyzed. RESULTS The expression of PTPRZ1 and CIN85 were significantly higher in cervical carcinoma than those in normal cervical epithelium. CIN85 expression was significantly higher in patients with deeper cervical invasion when compared with that with superficial invasion, while PTPRZ1 expression was significantly higher in patients with smaller tumor size (≤2 cm) than that with larger size (>2 cm). The expression of PTPRZ1 and CIN85 were higher in squamous cell carcinoma than those in adenocarcinoma. CONCLUSIONS There exist increased PTPRZ1 and CIN85 expression in cervical carcinoma and they are probably associated with tumor growth or invasion. PTPRZ1 and CIN85 expression were higher in squamous cell carcinoma than those in adenocarcinoma.
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Affiliation(s)
- Yaxi Ma
- Department of Gynecology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, People's Republic of China
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31
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Shimokawa N, Haglund K, Hölter SM, Grabbe C, Kirkin V, Koibuchi N, Schultz C, Rozman J, Hoeller D, Qiu CH, Londoño MB, Ikezawa J, Jedlicka P, Stein B, Schwarzacher SW, Wolfer DP, Ehrhardt N, Heuchel R, Nezis I, Brech A, Schmidt MHH, Fuchs H, Gailus-Durner V, Klingenspor M, Bogler O, Wurst W, Deller T, de Angelis MH, Dikic I. CIN85 regulates dopamine receptor endocytosis and governs behaviour in mice. EMBO J 2010; 29:2421-32. [PMID: 20551902 DOI: 10.1038/emboj.2010.120] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2009] [Accepted: 05/17/2010] [Indexed: 01/17/2023] Open
Abstract
Despite extensive investigations of Cbl-interacting protein of 85 kDa (CIN85) in receptor trafficking and cytoskeletal dynamics, little is known about its functions in vivo. Here, we report the study of a mouse deficient of the two CIN85 isoforms expressed in the central nervous system, exposing a function of CIN85 in dopamine receptor endocytosis. Mice lacking CIN85 exon 2 (CIN85(Deltaex2)) show hyperactivity phenotypes, characterized by increased physical activity and exploratory behaviour. Interestingly, CIN85(Deltaex2) animals display abnormally high levels of dopamine and D2 dopamine receptors (D2DRs) in the striatum, an important centre for the coordination of animal behaviour. Importantly, CIN85 localizes to the post-synaptic compartment of striatal neurons in which it co-clusters with D2DRs. Moreover, it interacts with endocytic regulators such as dynamin and endophilins in the striatum. Absence of striatal CIN85 causes insufficient complex formation of endophilins with D2DRs in the striatum and ultimately decreased D2DR endocytosis in striatal neurons in response to dopamine stimulation. These findings indicate an important function of CIN85 in the regulation of dopamine receptor functions and provide a molecular explanation for the hyperactive behaviour of CIN85(Deltaex2) mice.
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Affiliation(s)
- Noriaki Shimokawa
- Institute of Biochemistry II and Cluster of Excellence Macromolecular Complexes, Goethe University, Frankfurt (Main), Germany
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32
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Tossidou I, Teng B, Drobot L, Meyer-Schwesinger C, Worthmann K, Haller H, Schiffer M. CIN85/RukL is a novel binding partner of nephrin and podocin and mediates slit diaphragm turnover in podocytes. J Biol Chem 2010; 285:25285-95. [PMID: 20457601 DOI: 10.1074/jbc.m109.087239] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Podocyte damage is the basis of many glomerular diseases with ultrastructural changes and decreased expression of components of the slit diaphragm such as nephrin and podocin. Under physiological conditions it is likely that the slit diaphragm underlies permanent renewal processes to indemnify its stability in response to changes in filtration pressure. This would require constant reorganization of the podocyte foot process and the renewal of slit diaphragm components. Thus far, the mechanisms underlying the turnover of slit diaphragm proteins are largely unknown. In this manuscript we examined a mechanism of nephrin endocytosis via CIN85/Ruk(L)-mediated ubiquitination. We can demonstrate that the loss of nephrin expression and onset of the proteinuria in CD2AP(-/-) mice correlates with an increased accumulation of ubiquitinated proteins and expression of CIN85/Ruk(L) in podocytes. In cultured murine podocytes CD2AP deficiency leads to an early ubiquitination of nephrin and podocin after stimulation with fibroblast growth factor-4. Binding assays with different CIN85/Ruk isoforms and mutants showed that nephrin and podocin are binding to the coiled-coil domain of CIN85/Ruk(L). We found that in the presence of CIN85/Ruk(L), which is involved in down-regulation of receptor-tyrosine kinases, nephrin is internalized after stimulation with fibroblast growth factor-4. Interestingly, coexpression of CIN85/Ruk(L) with CD2AP led to a decreased binding of CIN85/Ruk(L) to nephrin and podocin, which indicates a functional competition between CD2AP and CIN85/Ruk(L). Our results support a novel role for CIN85/Ruk(L) in slit diaphragm turnover and proteinuria.
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Affiliation(s)
- Irini Tossidou
- Division of Nephrology, Medical School of Hannover, Carl-Neuberg Street 1, Hannover 30625, Germany.
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Cindr Interacts with Anillin to Control Cytokinesis in Drosophila melanogaster. Curr Biol 2010; 20:944-50. [DOI: 10.1016/j.cub.2010.03.068] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 03/29/2010] [Accepted: 03/29/2010] [Indexed: 11/20/2022]
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Structural characterization of a capping protein interaction motif defines a family of actin filament regulators. Nat Struct Mol Biol 2010; 17:497-503. [PMID: 20357771 DOI: 10.1038/nsmb.1792] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2009] [Accepted: 02/25/2010] [Indexed: 12/11/2022]
Abstract
Capping protein (CP) regulates actin dynamics by binding the barbed ends of actin filaments. Removal of CP may be one means to harness actin polymerization for processes such as cell movement and endocytosis. Here we structurally and biochemically investigated a CP interaction (CPI) motif present in the otherwise unrelated proteins CARMIL and CD2AP. The CPI motif wraps around the stalk of the mushroom-shaped CP at a site distant from the actin-binding interface, which lies on the top of the mushroom cap. We propose that the CPI motif may act as an allosteric modulator, restricting CP to a low-affinity, filament-binding conformation. Structure-based sequence alignments extend the CPI motif-containing family to include CIN85, CKIP-1, CapZIP and a relatively uncharacterized protein, WASHCAP (FAM21). Peptides comprising these CPI motifs are able to inhibit CP and to uncap CP-bound actin filaments.
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Havrylov S, Redowicz MJ, Buchman VL. Emerging roles of Ruk/CIN85 in vesicle-mediated transport, adhesion, migration and malignancy. Traffic 2010; 11:721-31. [PMID: 20331533 DOI: 10.1111/j.1600-0854.2010.01061.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Ruk/CIN85 is an adaptor protein. Similar to many other proteins of this type, Ruk/CIN85 is known to take part in multiple cellular processes including signal transduction, vesicle-mediated transport, cytoskeleton remodelling, programmed cell death and viral infection. Recent studies have also revealed the potential importance of Ruk/CIN85 in cancer cell invasiveness. In this review we summarize the various roles of this protein as well as the potential contribution of Ruk/CIN85 to malignancy and the invasiveness of cancer cells. In the last section of the paper we also speculate on the utility of Ruk/CIN85 as a target for novel anti-cancer therapies.
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Affiliation(s)
- Serhiy Havrylov
- Nencki Institute of Experimental Biology, Pasteura 3 Street, 02-093 Warsaw, Poland
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Ma Y, Yang H, Qi J, Liu D, Xiong P, Xu Y, Feng W, Zheng G, Li P, Fang M, Tan Z, Zheng F, Gong F. CD2AP is indispensable to multistep cytotoxic process by NK cells. Mol Immunol 2009; 47:1074-82. [PMID: 19945749 DOI: 10.1016/j.molimm.2009.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Revised: 10/29/2009] [Accepted: 11/03/2009] [Indexed: 12/13/2022]
Abstract
CD2-associated protein (CD2AP) is a cytoplasmic protein which localizes to membrane ruffles, lipid rafts and the leading edges of cells. It is implicated in podocyte homeostasis, signal transduction, dynamic actin remodeling and also membrane trafficking during endocytosis and cytokinesis. CD2AP was reported to orchestrate receptor patterning and cytoskeletal polarity in T cell contacts and it could also modulate TCR signaling. However, whether it plays a role in NK cell killing remains unknown. In this study, we discovered that interfering with CD2AP expression strongly reduced cytotoxicity of human NK92 cell line and this effect was independent of FasL sensitivity of target cells. Conjugate formation and degranulation were impeded in NK92 cells after CD2AP knockdown. Upon encountering target cells, CD2AP in NK92 is enriched near contact site and colocalizes with FasL-bearing granules. In contrast, FasL-bearing granules were found rarely polarized toward cell contact site after CD2AP knockdown. Furthermore, by immunoprecipitation from NK92 cell lysates and transient expression studies in 293T and Hela cells, we demonstrated that CD2AP associates with FasL. Thus, CD2AP, through facilitating conjugate formation and directed transport of lytic granules, plays an important role in NK cells killing.
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Affiliation(s)
- Yuting Ma
- Department of Immunology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Proteins recruited by SH3 domains of Ruk/CIN85 adaptor identified by LC-MS/MS. Proteome Sci 2009; 7:21. [PMID: 19531213 PMCID: PMC2702278 DOI: 10.1186/1477-5956-7-21] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Accepted: 06/16/2009] [Indexed: 11/27/2022] Open
Abstract
Background Ruk/CIN85 is a mammalian adaptor molecule with three SH3 domains. Using its SH3 domains Ruk/CIN85 can cluster multiple proteins and protein complexes, and, consequently, facilitates organisation of elaborate protein interaction networks with diverse regulatory roles. Previous research linked Ruk/CIN85 with the regulation of vesicle-mediated transport and cancer cell invasiveness. Despite the recent findings, precise molecular functions of Ruk/CIN85 in these processes remain largely elusive and further research is hampered by a lack of complete lists of its partner proteins. Results In the present study we employed a LC-MS/MS-based experimental pipeline to identify a considerable number (over 100) of proteins recruited by the SH3 domains of Ruk/CIN85 in vitro. Most of these identifications are novel Ruk/CIN85 interaction candidates. The identified proteins have diverse molecular architectures and can interact with other proteins, as well as with lipids and nucleic acids. Some of the identified proteins possess enzymatic activities. Functional profiling analyses and literature mining demonstrate that many of the proteins recruited by the SH3 domains of Ruk/CIN85 identified in this work were involved in the regulation of membranes and cytoskeletal structures necessary for vesicle-mediated transport and cancer cell invasiveness. Several groups of the proteins were also associated with few other cellular processes not previously related to Ruk/CIN85, most prominently with cell division. Conclusion Obtained data support the notion that Ruk/CIN85 regulates vesicle-mediated transport and cancer cell invasiveness through the assembly of multimeric protein complexes governing coordinated remodelling of membranes and underlying cytoskeletal structures, and imply its important roles in formation of coated vesicles and biogenesis of invadopodia. In addition, this study points to potential involvement of Ruk/CIN85 in other cellular processes, chiefly in cell division.
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Novel Insights into the Mechanisms of CIN85 SH3 Domains Binding to Cbl Proteins: Solution-Based Investigations and In Vivo Implications. J Mol Biol 2009; 387:1120-36. [DOI: 10.1016/j.jmb.2009.02.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Revised: 02/20/2009] [Accepted: 02/24/2009] [Indexed: 11/21/2022]
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Nikolaienko O, Skrypkina I, Tsyba L, Fedyshyn Y, Morderer D, Buchman V, de la Luna S, Drobot L, Rynditch A. Intersectin 1 forms a complex with adaptor protein Ruk/CIN85 in vivo independently of epidermal growth factor stimulation. Cell Signal 2009; 21:753-9. [PMID: 19166927 DOI: 10.1016/j.cellsig.2009.01.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 01/03/2009] [Indexed: 10/21/2022]
Abstract
Intersectin 1 (ITSN1) is an adaptor protein involved in clathrin-mediated endocytosis, apoptosis, signal transduction and cytoskeleton organization. Here, we show that ITSN1 forms a complex with adaptor protein Ruk/CIN85, implicated in downregulation of receptor tyrosine kinases. The interaction is mediated by the SH3A domain of ITSN1 and the third or fourth proline-rich blocks of Ruk/CIN85, and does not depend on epidermal growth factor stimulation, suggesting a constitutive association of ITSN1 with Ruk/CIN85. Moreover, both proteins colocalize in MCF-7 cells with their common binding partner, the ubiquitin ligase c-Cbl. The possible biological role of the interaction between ITSN1 and Ruk/CIN85 is discussed.
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Affiliation(s)
- Oleksii Nikolaienko
- Institute of Molecular Biology and Genetics, 150 Zabolotnogo Street, Kyiv 03680, Ukraine
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Ababou A, Pfuhl M, Ladbury JE. The binding stoichiometry of CIN85 SH3 domain A and cbl-b. Nat Struct Mol Biol 2008; 15:890-1; author reply 891-2. [PMID: 18769462 PMCID: PMC2770232 DOI: 10.1038/nsmb0908-890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Flynn DC, Cho Y, Vincent D, Cunnick JM. Podosomes and Invadopodia: Related structures with Common Protein Components that May Promote Breast Cancer Cellular Invasion. Breast Cancer (Auckl) 2008; 2:17-29. [PMID: 21655365 PMCID: PMC3085414 DOI: 10.4137/bcbcr.s789] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A rate-limiting step in breast cancer progression is acquisition of the invasive phenotype, which can precede metastasis. Expression of cell-surface proteases at the leading edge of a migrating cell provides cells with a mechanism to cross tissue barriers. A newly appreciated mechanism that may be relevant for breast cancer cell invasion is the formation of invadopodia, well-defined structures that project from the ventral membrane and promote degradation of the extracellular matrix, allowing the cell to cross a tissue barrier. Recently, there has been some controversy and discussion as to whether invadopodia, which are associated with carcinoma cells, are related to a similar structure called podosomes, which are associated with normal cells. Invadopodia and podosomes share many common characteristics, including a similar size, shape, subcellular localization and an ability to promote invasion. These two structures also share many common protein components, which we outline herein. It has been speculated that podosomes may be precursors to invadopodia and by extension both structures may be relevant to cancer cell invasion. Here, we compare and contrast the protein components of invadopodia and podosomes and discuss a potential role for these proteins and the evidence that supports a role for invadopodia and podosomes in breast cancer invasion.
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Affiliation(s)
- Daniel C. Flynn
- Mary Babb Randolph Cancer Center
- Department of Microbiology, Immunology and Cell Biology and
| | - YoungJin Cho
- Mary Babb Randolph Cancer Center
- Department of Microbiology, Immunology and Cell Biology and
| | - Deanne Vincent
- Mary Babb Randolph Cancer Center
- Department of Microbiology, Immunology and Cell Biology and
| | - Jess M. Cunnick
- Mary Babb Randolph Cancer Center
- Department of Pathology, West Virginia University, Morgantown, WV 26506-9300
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Johnson RI, Seppa MJ, Cagan RL. The Drosophila CD2AP/CIN85 orthologue Cindr regulates junctions and cytoskeleton dynamics during tissue patterning. ACTA ACUST UNITED AC 2008; 180:1191-204. [PMID: 18362180 PMCID: PMC2290846 DOI: 10.1083/jcb.200706108] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Developing tissues require cells to undergo intricate processes to shift into appropriate niches. This requires a functional connection between adhesion-mediating events at the cell surface and a cytoskeletal reorganization to permit directed movement. A small number of proteins are proposed to link these processes. Here, we identify one candidate, Cindr, the sole Drosophila melanogaster member of the CD2AP/CIN85 family (this family has been previously implicated in a variety of processes). Using D. melanogaster retina, we demonstrate that Cindr links cell surface junctions (E-cadherin) and adhesion (Roughest) with multiple components of the actin cytoskeleton. Reducing cindr activity leads to defects in local cell movement and, consequently, tissue patterning and cell death. Cindr activity is required for normal localization of Drosophila E-cadherin and Roughest, and we show additional physical and functional links to multiple components of the actin cytoskeleton, including the actin-capping proteins capping protein alpha and capping protein beta. Together, these data demonstrate that Cindr is involved in dynamic cell rearrangement in an emerging epithelium.
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Affiliation(s)
- Ruth I Johnson
- Department of Developmental and Regenerative Biology, Mount Sinai Medical School, New York, NY 10029, USA
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