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Kuhm T, Taisne C, de Agrela Pinto C, Gross L, Giannopoulou EA, Huber ST, Pardon E, Steyaert J, Tans SJ, Jakobi AJ. Structural basis of antimicrobial membrane coat assembly by human GBP1. Nat Struct Mol Biol 2024:10.1038/s41594-024-01400-9. [PMID: 39394410 DOI: 10.1038/s41594-024-01400-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 09/05/2024] [Indexed: 10/13/2024]
Abstract
Guanylate-binding proteins (GBPs) are interferon-inducible guanosine triphosphate hydrolases (GTPases) mediating host defense against intracellular pathogens. Their antimicrobial activity hinges on their ability to self-associate and coat pathogen-associated compartments or cytosolic bacteria. Coat formation depends on GTPase activity but how nucleotide binding and hydrolysis prime coat formation remains unclear. Here, we report the cryo-electron microscopy structure of the full-length human GBP1 dimer in its guanine nucleotide-bound state and describe the molecular ultrastructure of the GBP1 coat on liposomes and bacterial lipopolysaccharide membranes. Conformational changes of the middle and GTPase effector domains expose the isoprenylated C terminus for membrane association. The α-helical middle domains form a parallel, crossover arrangement essential for coat formation and position the extended effector domain for intercalation into the lipopolysaccharide layer of gram-negative membranes. Nucleotide binding and hydrolysis create oligomeric scaffolds with contractile abilities that promote membrane extrusion and fragmentation. Our data offer a structural and mechanistic framework for understanding GBP1 effector functions in intracellular immunity.
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Affiliation(s)
- Tanja Kuhm
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands
| | - Clémence Taisne
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands
| | - Cecilia de Agrela Pinto
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands
| | | | - Evdokia A Giannopoulou
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands
| | - Stefan T Huber
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands
| | - Els Pardon
- VIB-VUB Center for Structural Biology, Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium
| | - Jan Steyaert
- VIB-VUB Center for Structural Biology, Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel, Brussels, Belgium
| | - Sander J Tans
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands
- AMOLF, Amsterdam, The Netherlands
| | - Arjen J Jakobi
- Department of Bionanoscience, Kavli Insitute of Nanoscience, Delft University of Technology, Delft, The Netherlands.
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2
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Murillo-Léon M, Bastidas-Quintero AM, Steinfeldt T. Decoding Toxoplasma gondii virulence: the mechanisms of IRG protein inactivation. Trends Parasitol 2024; 40:805-819. [PMID: 39168720 DOI: 10.1016/j.pt.2024.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/17/2024] [Accepted: 07/18/2024] [Indexed: 08/23/2024]
Abstract
Toxoplasmosis is a common parasitic zoonosis that can be life-threatening in immunocompromised patients. About one-third of the human population is infected with Toxoplasma gondii. Primary infection triggers an innate immune response wherein IFN-γ-induced host cell GTPases, namely IRG and GBP proteins, serve as a vital component for host cell resistance. In the past decades, interest in elucidating the function of these GTPase families in controlling various intracellular pathogens has emerged. Numerous T. gondii effectors were identified to inactivate particular IRG proteins. T. gondii is re-optimizing its effectors to combat IRG function and in this way secures transmission. We discuss the IRG-specific effectors employed by the parasite in murine infections, contributing to a better understanding of T. gondii virulence.
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Affiliation(s)
- Mateo Murillo-Léon
- Institute of Medical Microbiology and Hygiene, Medical Center University of Freiburg, 79104 Freiburg, Germany; CIBSS, Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany; Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - Aura María Bastidas-Quintero
- Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Institute of Virology, Medical Center University of Freiburg, 79104 Freiburg, Germany; Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany
| | - Tobias Steinfeldt
- Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Institute of Virology, Medical Center University of Freiburg, 79104 Freiburg, Germany.
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3
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Tessema MB, Feng S, Enosi Tuipulotu D, Farrukee R, Ngo C, Gago da Graça C, Yamomoto M, Utzschneider DT, Brooks AG, Londrigan SL, Man SM, Reading PC. Mouse guanylate-binding proteins of the chromosome 3 cluster do not mediate antiviral activity in vitro or in mouse models of infection. Commun Biol 2024; 7:1050. [PMID: 39183326 PMCID: PMC11345437 DOI: 10.1038/s42003-024-06748-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 08/16/2024] [Indexed: 08/27/2024] Open
Abstract
Dynamin-like GTPase proteins, including myxoma (Mx) and guanylate-binding proteins (GBPs), are among the many interferon stimulated genes induced following viral infections. While studies report that human (h)GBPs inhibit different viruses in vitro, few have convincingly demonstrated that mouse (m)GBPs mediate antiviral activity, although mGBP-deficient mice have been used extensively to define their importance in immunity to diverse intracellular bacteria and protozoa. Herein, we demonstrate that individual (overexpression) or collective (knockout (KO) mice) mGBPs of the chromosome 3 cluster (mGBPchr3) do not inhibit replication of five viruses from different virus families in vitro, nor do we observe differences in virus titres recovered from wild type versus mGBPchr3 KO mice after infection with three of these viruses (influenza A virus, herpes simplex virus type 1 or lymphocytic choriomeningitis virus). These data indicate that mGBPchr3 do not appear to be a major component of cell-intrinsic antiviral immunity against the diverse viruses tested in our studies.
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Affiliation(s)
- Melkamu B Tessema
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Shouya Feng
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Australia
| | - Daniel Enosi Tuipulotu
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, Australia
| | - Rubaiyea Farrukee
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Chinh Ngo
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Catarina Gago da Graça
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Masahiro Yamomoto
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Daniel T Utzschneider
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Andrew G Brooks
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Sarah L Londrigan
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Si Ming Man
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Patrick C Reading
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia.
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, at The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia.
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4
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Chen D, Cao H, Zheng X, Wang H, Han Z, Wang W. Immune checkpoint gene signature assesses immune infiltration profiles in bladder cancer and identifies KRT23 as an immunotherapeutic target. BMC Cancer 2024; 24:1024. [PMID: 39160525 PMCID: PMC11331755 DOI: 10.1186/s12885-024-12790-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Accepted: 08/09/2024] [Indexed: 08/21/2024] Open
Abstract
BACKGROUND In the past few decades, researchers have made promising progress, including the development of immune checkpoint inhibitors (ICIs) in the therapy of bladder cancer (BLCA). Existing studies mainly focus on single immune checkpoint inhibitors but lack relevant studies on the gene expression profiles of multiple immune checkpoints. METHODS RNA-sequencing profiling data and clinical information of BLCA patients and normal human bladder samples were acquired from the Cancer Genome Atlas and Gene Expression Omnibus databases and analyzed to identify different expression profiles of immune checkpoint genes (ICGs) after consensus clustering analysis. Based on the 526 intersecting differentially expressed genes, the LASSO Cox regression analysis was utilized to construct the ICG signature. RESULTS According to the expression of ICGs, BLCA patients were divided into three subtypes with different phenotypic and mechanistic characteristics. Furthermore, the developed ICG signature were independent predictors of outcome in BLCA patients, and was correlated with the immune infiltration, the expression of ICGs and chemotherapeutic effect. CONCLUSIONS This study systematically and comprehensively analyzed the expression profile of immune checkpoint genes, and established the ICG signature to investigate the differences in ICGs expression and tumor immune microenvironment, which will help risk stratification and accelerate precision medicine. Finally, we identified KRT23 as the most critical model gene, and highlighted KRT23 as a potential target to enhance immunotherapy against BLCA.
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Affiliation(s)
- Dongshan Chen
- Department of Urology, Beijing Chaoyang Hospital Affiliated Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, 100020, China
- Department of Urology, Qilu Hospital of Shandong University, Wenhuaxi Road #107, Jinan, 250012, China
| | - Haoyuan Cao
- Department of Urology, Beijing Chaoyang Hospital Affiliated Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, 100020, China
| | - Xiang Zheng
- Department of Urology, Beijing Chaoyang Hospital Affiliated Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, 100020, China
| | - Haojun Wang
- Department of Urology, Beijing Chaoyang Hospital Affiliated Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, 100020, China
| | - Zengchi Han
- Department of Urology, The Second Affiliated Hospital of Shandong University of Traditional Chinese Medicine, NO.1 Jingba Road, Shizhong District, Jinan, 250001, China.
| | - Wei Wang
- Department of Urology, Beijing Chaoyang Hospital Affiliated Capital Medical University, 8 Gong Ti Nan Road, Chaoyang District, Beijing, 100020, China.
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5
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Wang S, Li W, Wang L, Tiwari SK, Bray W, Wu L, Li N, Hui H, Clark AE, Zhang Q, Zhang L, Carlin AF, Rana TM. Interferon-Inducible Guanylate-Binding Protein 5 Inhibits Replication of Multiple Viruses by Binding to the Oligosaccharyltransferase Complex and Inhibiting Glycoprotein Maturation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.01.591800. [PMID: 38746287 PMCID: PMC11092618 DOI: 10.1101/2024.05.01.591800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Viral infection induces production of type I interferons and expression of interferon-stimulated genes (ISGs) that play key roles in inhibiting viral infection. Here, we show that the ISG guanylate-binding protein 5 (GBP5) inhibits N-linked glycosylation of key proteins in multiple viruses, including SARS-CoV-2 spike protein. GBP5 binds to accessory subunits of the host oligosaccharyltransferase (OST) complex and blocks its interaction with the spike protein, which results in misfolding and retention of spike protein in the endoplasmic reticulum likely due to decreased N-glycan transfer, and reduces the assembly and release of infectious virions. Consistent with these observations, pharmacological inhibition of the OST complex with NGI-1 potently inhibits glycosylation of other viral proteins, including MERS-CoV spike protein, HIV-1 gp160, and IAV hemagglutinin, and prevents the production of infectious virions. Our results identify a novel strategy by which ISGs restrict virus infection and provide a rationale for targeting glycosylation as a broad antiviral therapeutic strategy.
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Affiliation(s)
- Shaobo Wang
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
- These authors contributed equally to this work
| | - Wanyu Li
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
- These authors contributed equally to this work
| | - Lingling Wang
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Shashi Kant Tiwari
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - William Bray
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Lujing Wu
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Na Li
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Hui Hui
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Alex E. Clark
- Division of Infectious Diseases and Global Public Health, Department of Medicine; University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Qiong Zhang
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Lingzhi Zhang
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Aaron F. Carlin
- Division of Infectious Diseases and Global Public Health, Department of Medicine; University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
| | - Tariq M. Rana
- Division of Genetics, Department of Pediatrics, Program in Immunology, Bioinformatics and Systems Biology Program, Institute for Genomic Medicine, UCSD Center for AIDS Research, University of California San Diego, 9500 Gilman Drive MC 0762, La Jolla, California 92093, USA
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6
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Marinho FV, Brito C, de Araujo ACVSC, Oliveira SC. Guanylate-binding protein-5 is involved in inflammasome activation by bacterial DNA but only the cooperation of multiple GBPs accounts for control of Brucella abortus infection. Front Immunol 2024; 15:1341464. [PMID: 38404575 PMCID: PMC10885698 DOI: 10.3389/fimmu.2024.1341464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 01/26/2024] [Indexed: 02/27/2024] Open
Abstract
Introduction Guanylate-binding proteins (GBPs) are produced in response to pro-inflammatory signals, mainly interferons. The most studied cluster of GBPs in mice is on chromosome 3. It comprises the genes for GBP1-to-3, GBP5 and GBP7. In humans, all GBPs are present in a single cluster on chromosome 1. Brucella abortus is a Gram-negative bacterium known to cause brucellosis, a debilitating disease that affects both humans and animals. Our group demonstrated previously that GBPs present on murine chromosome 3 (GBPchr3) is important to disrupt Brucella-containing vacuole and GBP5 itself is important to Brucella intracellular LPS recognition. In this work, we investigated further the role of GBPs during B. abortus infection. Methods and results We observed that all GBPs from murine chromosome 3 are significantly upregulated in response to B. abortus infection in mouse bone marrow-derived macrophages. Of note, GBP5 presents the highest expression level in all time points evaluated. However, only GBPchr3-/- cells presented increased bacterial burden compared to wild-type macrophages. Brucella DNA is an important Pathogen-Associated Molecular Pattern that could be available for inflammasome activation after BCV disruption mediated by GBPs. In this regard, we observed reduced IL-1β production in the absence of GBP2 or GBP5, as well as in GBPchr3-/- murine macrophages. Similar result was showed by THP-1 macrophages with downregulation of GBP2 and GBP5 mediated by siRNA. Furthermore, significant reduction on caspase-1 p20 levels, LDH release and Gasdermin-D conversion into its mature form (p30 N-terminal subunit) was observed only in GBPchr3-/- macrophages. In an in vivo perspective, we found that GBPchr3-/- mice had increased B. abortus burden and higher number of granulomas per area of liver tissue, indicating increased disease severity. Discussion/conclusion Altogether, these results demonstrate that although GBP5 presents a high expression pattern and is involved in inflammasome activation by bacterial DNA in macrophages, the cooperation of multiple GBPs from murine chromosome 3 is necessary for full control of Brucella abortus infection.
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Affiliation(s)
- Fabio V. Marinho
- Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Camila Brito
- Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Carolina V. S. C. de Araujo
- Instituto de Ciências Biológicas, Departamento de Genética, Ecologia e Evolução, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Instituto de Ciências Biomédicas, Departamento de Imunologia, Universidade de São Paulo, São Paulo, Brazil
| | - Sergio C. Oliveira
- Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Instituto de Ciências Biomédicas, Departamento de Imunologia, Universidade de São Paulo, São Paulo, Brazil
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7
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Bender D, Koulouri A, Wen X, Glitscher M, Schollmeier A, Fernandes da Costa L, Murra RO, Carra GP, Haberger V, Praefcke GJK, Hildt E. Guanylate-binding protein 1 acts as a pro-viral factor for the life cycle of hepatitis C virus. PLoS Pathog 2024; 20:e1011976. [PMID: 38315728 PMCID: PMC10868826 DOI: 10.1371/journal.ppat.1011976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 02/15/2024] [Accepted: 01/16/2024] [Indexed: 02/07/2024] Open
Abstract
Viral infections trigger the expression of interferons (IFNs) and interferon stimulated genes (ISGs), which are crucial to modulate an antiviral response. The human guanylate binding protein 1 (GBP1) is an ISG and exhibits antiviral activity against several viruses. In a previous study, GBP1 was described to impair replication of the hepatitis C virus (HCV). However, the impact of GBP1 on the HCV life cycle is still enigmatic. To monitor the expression and subcellular distribution of GBP1 and HCV we performed qPCR, Western blot, CLSM and STED microscopy, virus titration and reporter gene assays. In contrast to previous reports, we observed that HCV induces the expression of GBP1. Further, to induce GBP1 expression, the cells were stimulated with IFNγ. GBP1 modulation was achieved either by overexpression of GBP1-Wt or by siRNA-mediated knockdown. Silencing of GBP1 impaired the release of viral particles and resulted in intracellular HCV core accumulation, while overexpression of GBP1 favored viral replication and release. CLSM and STED analyses revealed a vesicular distribution of GBP1 in the perinuclear region. Here, it colocalizes with HCV core around lipid droplets, where it acts as assembly platform and thereby favors HCV morphogenesis and release. Collectively, our results identify an unprecedented function of GBP1 as a pro-viral factor. As such, it is essential for viral assembly and release acting through tethering factors involved in HCV morphogenesis onto the surface of lipid droplets.
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Affiliation(s)
- Daniela Bender
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | | | - Xingjian Wen
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | - Mirco Glitscher
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | | | | | | | - Gert Paul Carra
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
| | | | - Gerrit J. K. Praefcke
- Paul-Ehrlich-Institut, Department Haematology and Transfusion Medicine, Langen, Germany
| | - Eberhard Hildt
- Paul-Ehrlich-Institut, Department of Virology, Langen, Germany
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8
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Weismehl M, Chu X, Kutsch M, Lauterjung P, Herrmann C, Kudryashev M, Daumke O. Structural insights into the activation mechanism of antimicrobial GBP1. EMBO J 2024; 43:615-636. [PMID: 38267655 PMCID: PMC10897159 DOI: 10.1038/s44318-023-00023-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 01/26/2024] Open
Abstract
The dynamin-related human guanylate-binding protein 1 (GBP1) mediates host defenses against microbial pathogens. Upon GTP binding and hydrolysis, auto-inhibited GBP1 monomers dimerize and assemble into soluble and membrane-bound oligomers, which are crucial for innate immune responses. How higher-order GBP1 oligomers are built from dimers, and how assembly is coordinated with nucleotide-dependent conformational changes, has remained elusive. Here, we present cryo-electron microscopy-based structural data of soluble and membrane-bound GBP1 oligomers, which show that GBP1 assembles in an outstretched dimeric conformation. We identify a surface-exposed helix in the large GTPase domain that contributes to the oligomerization interface, and we probe its nucleotide- and dimerization-dependent movements that facilitate the formation of an antimicrobial protein coat on a gram-negative bacterial pathogen. Our results reveal a sophisticated activation mechanism for GBP1, in which nucleotide-dependent structural changes coordinate dimerization, oligomerization, and membrane binding to allow encapsulation of pathogens within an antimicrobial protein coat.
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Affiliation(s)
- Marius Weismehl
- Structural Biology, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125, Berlin, Germany
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, 14195, Berlin, Germany
| | - Xiaofeng Chu
- In Situ Structural Biology, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125, Berlin, Germany
| | - Miriam Kutsch
- Institute of Molecular Pathogenicity, Faculty of Mathematics and Natural Sciences, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
- Institute of Medical Microbiology and Hospital Hygiene, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
- Institute of Biochemistry, Faculty of Mathematics and Natural Sciences, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
- Department of Molecular Genetics and Microbiology, Duke University, 27710, Durham, NC, USA
| | - Paul Lauterjung
- Faculty of Chemistry and Biochemistry, Physical Chemistry I, Ruhr-University Bochum, 44801, Bochum, Germany
- Institute of Molecular Physical Chemistry, Faculty of Mathematics and Natural Sciences, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
| | - Christian Herrmann
- Faculty of Chemistry and Biochemistry, Physical Chemistry I, Ruhr-University Bochum, 44801, Bochum, Germany
| | - Misha Kudryashev
- In Situ Structural Biology, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125, Berlin, Germany
- Institute of Medical Physics and Biophysics, Charité-Universitätsmedizin Berlin, 10117, Berlin, Germany
| | - Oliver Daumke
- Structural Biology, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125, Berlin, Germany.
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, 14195, Berlin, Germany.
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9
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Schelle L, Côrte-Real JV, Fayyaz S, del Pozo Ben A, Shnipova M, Petersen M, Lotke R, Menon B, Matzek D, Pfaff L, Pinheiro A, Marques JP, Melo-Ferreira J, Popper B, Esteves PJ, Sauter D, Abrantes J, Baldauf HM. Evolutionary and functional characterization of lagomorph guanylate-binding proteins: a story of gain and loss and shedding light on expression, localization and innate immunity-related functions. Front Immunol 2024; 15:1303089. [PMID: 38348040 PMCID: PMC10859415 DOI: 10.3389/fimmu.2024.1303089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 01/04/2024] [Indexed: 02/15/2024] Open
Abstract
Guanylate binding proteins (GBPs) are an evolutionarily ancient family of proteins that are widely distributed among eukaryotes. They belong to the dynamin superfamily of GTPases, and their expression can be partially induced by interferons (IFNs). GBPs are involved in the cell-autonomous innate immune response against bacterial, parasitic and viral infections. Evolutionary studies have shown that GBPs exhibit a pattern of gene gain and loss events, indicative for the birth-and-death model of evolution. Most species harbor large GBP gene clusters that encode multiple paralogs. Previous functional and in-depth evolutionary studies have mainly focused on murine and human GBPs. Since rabbits are another important model system for studying human diseases, we focus here on lagomorphs to broaden our understanding of the multifunctional GBP protein family by conducting evolutionary analyses and performing a molecular and functional characterization of rabbit GBPs. We observed that lagomorphs lack GBP3, 6 and 7. Furthermore, Leporidae experienced a loss of GBP2, a unique duplication of GBP5 and a massive expansion of GBP4. Gene expression analysis by reverse transcriptase quantitative polymerase chain reaction (RT-qPCR) and transcriptome data revealed that leporid GBP expression varied across tissues. Overexpressed rabbit GBPs localized either uniformly and/or discretely to the cytoplasm and/or to the nucleus. Oryctolagus cuniculus (oc)GBP5L1 and rarely ocGBP5L2 were an exception, colocalizing with the trans-Golgi network (TGN). In addition, four ocGBPs were IFN-inducible and only ocGBP5L2 inhibited furin activity. In conclusion, from an evolutionary perspective, lagomorph GBPs experienced multiple gain and loss events, and the molecular and functional characteristics of ocGBP suggest a role in innate immunity.
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Affiliation(s)
- Luca Schelle
- Max von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, LMU München, Munich, Germany
| | - João Vasco Côrte-Real
- Max von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, LMU München, Munich, Germany
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
| | - Sharmeen Fayyaz
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
- National Institute of Virology, International Center of Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Augusto del Pozo Ben
- Max von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, LMU München, Munich, Germany
| | - Margarita Shnipova
- Max von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, LMU München, Munich, Germany
| | - Moritz Petersen
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
| | - Rishikesh Lotke
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
| | - Bhavna Menon
- Max von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, LMU München, Munich, Germany
| | - Dana Matzek
- Biomedical Center (BMC), Core facility Animal Models (CAM), Faculty of Medicine, LMU München, Munich, Germany
| | - Lena Pfaff
- Biomedical Center (BMC), Core facility Animal Models (CAM), Faculty of Medicine, LMU München, Munich, Germany
| | - Ana Pinheiro
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
| | - João Pedro Marques
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
- ISEM, University of Montpellier, CNRS, EPHE, IRD, Montpellier, France
| | - José Melo-Ferreira
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
| | - Bastian Popper
- Biomedical Center (BMC), Core facility Animal Models (CAM), Faculty of Medicine, LMU München, Munich, Germany
| | - Pedro José Esteves
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
- CITS - Center of Investigation in Health Technologies, CESPU, Gandra, Portugal
| | - Daniel Sauter
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
| | - Joana Abrantes
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Vairão, Portugal
| | - Hanna-Mari Baldauf
- Max von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, Faculty of Medicine, LMU München, Munich, Germany
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10
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Schumann W, Loschwitz J, Reiners J, Degrandi D, Legewie L, Stühler K, Pfeffer K, Poschmann G, Smits SHJ, Strodel B. Integrative modeling of guanylate binding protein dimers. Protein Sci 2023; 32:e4818. [PMID: 37916607 PMCID: PMC10683561 DOI: 10.1002/pro.4818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/27/2023] [Accepted: 09/30/2023] [Indexed: 11/03/2023]
Abstract
Guanylate-binding proteins (GBPs) are essential interferon-γ-activated large GTPases that play a crucial role in host defense against intracellular bacteria and parasites. While their protective functions rely on protein polymerization, our understanding of the structural intricacies of these multimerized states remains limited. To bridge this knowledge gap, we present dimer models for human GBP1 (hGBP1) and murine GBP2 and 7 (mGBP2 and mGBP7) using an integrative approach, incorporating the crystal structure of hGBP1's GTPase domain dimer, crosslinking mass spectrometry, small-angle X-ray scattering, protein-protein docking, and molecular dynamics simulations. Our investigation begins by comparing the protein dynamics of hGBP1, mGBP2, and mGBP7. We observe that the M/E domain in all three proteins exhibits significant mobility and hinge motion, with mGBP7 displaying a slightly less pronounced motion but greater flexibility in its GTPase domain. These dynamic distinctions can be attributed to variations in the sequences of mGBP7 and hGBP1/mGBP2, resulting in different dimerization modes. Unlike hGBP1 and its close ortholog mGBP2, which exclusively dimerize through their GTPase domains, we find that mGBP7 exhibits three equally probable alternative dimer structures. The GTPase domain of mGBP7 is only partially involved in its dimerization, primarily due to an accumulation of negative charge, allowing mGBP7 to dimerize independently of GTP. Instead, mGBP7 exhibits a strong tendency to dimerize in an antiparallel arrangement across its stalks. The results of this work go beyond the sequence-structure-function relationship, as the sequence differences in mGBP7 and mGBP2/hGBP1 do not lead to different structures, but to different protein dynamics and dimerization. The distinct GBP dimer structures are expected to encode specific functions crucial for disrupting pathogen membranes.
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Affiliation(s)
- Wibke Schumann
- Institute of Theoretical and Computational ChemistryHeinrich Heine University DüsseldorfDüsseldorfGermany
- Institute of Biological Information Processing: Structural BiochemistryForschungszentrum JülichJülichGermany
| | - Jennifer Loschwitz
- Institute of Theoretical and Computational ChemistryHeinrich Heine University DüsseldorfDüsseldorfGermany
- Institute of Biological Information Processing: Structural BiochemistryForschungszentrum JülichJülichGermany
| | - Jens Reiners
- Center for Structural StudiesHeinrich Heine University DüsseldorfDüsseldorfGermany
| | - Daniel Degrandi
- Institute of Medical Microbiology and Hospital HygieneHeinrich Heine UniversityDüsseldorfGermany
| | - Larissa Legewie
- Institute of Medical Microbiology and Hospital HygieneHeinrich Heine UniversityDüsseldorfGermany
| | - Kai Stühler
- Institute of Molecular Medicine, Proteome ResearchMedical Faculty and University Hospital Düsseldorf, Heinrich Heine University DüsseldorfDüsseldorfGermany
- Molecular Proteomics Laboratory, Biomedical Research Centre (BMFZ)Heinrich Heine University DüsseldorfDüsseldorfGermany
| | - Klaus Pfeffer
- Institute of Medical Microbiology and Hospital HygieneHeinrich Heine UniversityDüsseldorfGermany
| | - Gereon Poschmann
- Institute of Molecular Medicine, Proteome ResearchMedical Faculty and University Hospital Düsseldorf, Heinrich Heine University DüsseldorfDüsseldorfGermany
| | - Sander H. J. Smits
- Center for Structural StudiesHeinrich Heine University DüsseldorfDüsseldorfGermany
- Institute for BiochemistryHeinrich Heine University DüsseldorfDüsseldorfGermany
| | - Birgit Strodel
- Institute of Theoretical and Computational ChemistryHeinrich Heine University DüsseldorfDüsseldorfGermany
- Institute of Biological Information Processing: Structural BiochemistryForschungszentrum JülichJülichGermany
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11
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Gao Z, He X, Chen G, Fang Y, Meng Z, Tian H, Zhang H, Jing Z. The Viral Protein Poly(A) Polymerase Catalytic Subunit Interacts with Guanylate-Binding Proteins 2 to Antagonize the Antiviral Ability of Targeting Ectromelia Virus. Int J Mol Sci 2023; 24:15750. [PMID: 37958732 PMCID: PMC10648259 DOI: 10.3390/ijms242115750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/16/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
The recent spread of the monkeypox virus among humans has heightened concerns regarding orthopoxvirus infections. Consequently, conducting a comprehensive study on the immunobiology of the monkeypox virus is imperative for the development of effective therapeutics. Ectromelia virus (ECTV) closely resembles the genetic and disease characteristics of monkeypox virus, making it a valuable research tool for studying orthopoxvirus-host interactions. Guanylate-binding proteins (GBPs), highly expressed interferon-stimulated genes (ISGs), have antagonistic effects against various intracellular pathogenic microorganisms. Our previous research has shown that GBP2 has a mild but statistically significant inhibitory effect on ECTV infection. The presence of a significant number of molecules in the poxvirus genome that encode the host immune response raises questions about whether it also includes proteins that counteract the antiviral activity of GBP2. Using IP/MS and co-IP technology, we discovered that the poly(A) polymerase catalytic subunit (PAPL) protein of ECTV is a viral regulatory molecule that interacts with GBP2. Further studies have shown that PAPL antagonizes the antiviral activity of GBP2 by reducing its protein levels. Knocking out the PAPL gene of ECTV with the CRISPR/Cas9 system significantly diminishes the replication ability of the virus, indicating the indispensable role of PAPL in the replication process of ECTV. In conclusion, our study presents preliminary evidence supporting the significance of PAPL as a virulence factor that can interact with GBP2.
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Affiliation(s)
- Zhenzhen Gao
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
| | - Xiaobing He
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
| | - Guohua Chen
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
| | - Yongxiang Fang
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
| | - Zejing Meng
- School of Public Health, Lanzhou University, Lanzhou 730000, China;
| | - Huihui Tian
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
| | - Hui Zhang
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
| | - Zhizhong Jing
- State Key Laboratory for Animal Disease Control and Prevention, Ministry of Agriculture Key Laboratory of Veterinary Public Health, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- School of Public Health, Lanzhou University, Lanzhou 730000, China;
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12
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Fisch D, Pfleiderer MM, Anastasakou E, Mackie GM, Wendt F, Liu X, Clough B, Lara-Reyna S, Encheva V, Snijders AP, Bando H, Yamamoto M, Beggs AD, Mercer J, Shenoy AR, Wollscheid B, Maslowski KM, Galej WP, Frickel EM. PIM1 controls GBP1 activity to limit self-damage and to guard against pathogen infection. Science 2023; 382:eadg2253. [PMID: 37797010 PMCID: PMC7615196 DOI: 10.1126/science.adg2253] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 08/23/2023] [Indexed: 10/07/2023]
Abstract
Disruption of cellular activities by pathogen virulence factors can trigger innate immune responses. Interferon-γ (IFN-γ)-inducible antimicrobial factors, such as the guanylate binding proteins (GBPs), promote cell-intrinsic defense by attacking intracellular pathogens and by inducing programmed cell death. Working in human macrophages, we discovered that GBP1 expression in the absence of IFN-γ killed the cells and induced Golgi fragmentation. IFN-γ exposure improved macrophage survival through the activity of the kinase PIM1. PIM1 phosphorylated GBP1, leading to its sequestration by 14-3-3σ, which thereby prevented GBP1 membrane association. During Toxoplasma gondii infection, the virulence protein TgIST interfered with IFN-γ signaling and depleted PIM1, thereby increasing GBP1 activity. Although infected cells can restrain pathogens in a GBP1-dependent manner, this mechanism can protect uninfected bystander cells. Thus, PIM1 can provide a bait for pathogen virulence factors, guarding the integrity of IFN-γ signaling.
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Affiliation(s)
- Daniel Fisch
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London, UK
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, UK
| | - Moritz M Pfleiderer
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, Grenoble, France
| | - Eleni Anastasakou
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, Grenoble, France
| | - Gillian M Mackie
- Institute of Immunology and Immunotherapy, University of Birmingham, Edgbaston, UK
| | - Fabian Wendt
- Department of Health Sciences and Technology (D-HEST), ETH Zurich, Institute of Translational Medicine (ITM), Zurich, Switzerland
- Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - Xiangyang Liu
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, Grenoble, France
| | - Barbara Clough
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, UK
| | - Samuel Lara-Reyna
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, UK
| | - Vesela Encheva
- Mass Spectrometry and Proteomics Platform, The Francis Crick Institute, London, UK
| | - Ambrosius P Snijders
- Mass Spectrometry and Proteomics Platform, The Francis Crick Institute, London, UK
- Bruker Nederland BV
| | - Hironori Bando
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Laboratory of Immunoparasitology, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Masahiro Yamamoto
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Laboratory of Immunoparasitology, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Andrew D Beggs
- Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, UK
| | - Jason Mercer
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, UK
| | - Avinash R Shenoy
- MRC Centre for Molecular Bacteriology & Infection, Department of Infectious Disease, Imperial College London, London, UK
- The Francis Crick Institute, London, UK
| | - Bernd Wollscheid
- Department of Health Sciences and Technology (D-HEST), ETH Zurich, Institute of Translational Medicine (ITM), Zurich, Switzerland
- Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland
| | - Kendle M Maslowski
- Institute of Immunology and Immunotherapy, University of Birmingham, Edgbaston, UK
- Institute of Metabolism and Systems Research, University of Birmingham, Edgbaston, UK
- Cancer Research UK Beatson Institute, Glasgow, UK
- School of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Wojtek P Galej
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, Grenoble, France
| | - Eva-Maria Frickel
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London, UK
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, UK
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13
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Kirkby M, Enosi Tuipulotu D, Feng S, Lo Pilato J, Man SM. Guanylate-binding proteins: mechanisms of pattern recognition and antimicrobial functions. Trends Biochem Sci 2023; 48:883-893. [PMID: 37567806 DOI: 10.1016/j.tibs.2023.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 06/19/2023] [Accepted: 07/11/2023] [Indexed: 08/13/2023]
Abstract
Guanylate-binding proteins (GBPs) are a family of intracellular proteins which have diverse biological functions, including pathogen sensing and host defense against infectious disease. These proteins are expressed in response to interferon (IFN) stimulation and can localize and target intracellular microbes (e.g., bacteria and viruses) by protein trafficking and membrane binding. These properties contribute to the ability of GBPs to induce inflammasome activation, inflammation, and cell death, and to directly disrupt pathogen membranes. Recent biochemical studies have revealed that human GBP1, GBP2, and GBP3 can directly bind to the lipopolysaccharide (LPS) of Gram-negative bacteria. In this review we discuss emerging data highlighting the functional versatility of GBPs, with a focus on their molecular mechanisms of pattern recognition and antimicrobial activity.
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Affiliation(s)
- Max Kirkby
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Daniel Enosi Tuipulotu
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Shouya Feng
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Jordan Lo Pilato
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia
| | - Si Ming Man
- Division of Immunology and Infectious Disease, The John Curtin School of Medical Research, The Australian National University, Canberra, Australia.
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14
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Rivera-Cuevas Y, Clough B, Frickel EM. Human guanylate-binding proteins in intracellular pathogen detection, destruction, and host cell death induction. Curr Opin Immunol 2023; 84:102373. [PMID: 37536111 DOI: 10.1016/j.coi.2023.102373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 08/05/2023]
Abstract
Cell-intrinsic defense is an essential part of the immune response against intracellular pathogens regulated by cytokine-induced proteins and pathways. One of the most upregulated families of proteins in this defense system are the guanylate-binding proteins (GBPs), large GTPases of the dynamin family, induced in response to interferon gamma. Human GBPs (hGBPs) exert their antimicrobial activity through detection of pathogen-associated molecular patterns and/or damage-associated molecular patterns to execute control mechanisms directed at the pathogen itself as well as the vacuolar compartments in which it resides. Consequently, hGBPs are also inducers of canonical and noncanonical inflammasome responses leading to host cell death. The mechanisms are both cell-type and pathogen-dependent with hGBP1 acting as a pioneer sensor for intracellular invaders. This review focuses on the most recent functional roles of hGBPs in pathways of pathogen detection, destruction, and host cell death induction.
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Affiliation(s)
- Yolanda Rivera-Cuevas
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Barbara Clough
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, United Kingdom
| | - Eva-Maria Frickel
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, United Kingdom.
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15
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Gao Z, Meng Z, He X, Chen G, Fang Y, Tian H, Zhang H, Jing Z. Guanylate-Binding Protein 2 Exerts GTPase-Dependent Anti-Ectromelia Virus Effect. Microorganisms 2023; 11:2258. [PMID: 37764102 PMCID: PMC10534507 DOI: 10.3390/microorganisms11092258] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 09/05/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Guanylate-binding proteins (GBPs) are highly expressed interferon-stimulated genes (ISGs) that play significant roles in protecting against invading pathogens. Although their functions in response to RNA viruses have been extensively investigated, there is limited information available regarding their role in DNA viruses, particularly poxviruses. Ectromelia virus (ECTV), a member of the orthopoxvirus genus, is a large double-stranded DNA virus closely related to the monkeypox virus and variola virus. It has been intensively studied as a highly effective model virus. According to the study, GBP2 overexpression suppresses ECTV replication in a dose-dependent manner, while GBP2 knockdown promotes ECTV infection. Additionally, it was discovered that GBP2 primarily functions through its N-terminal GTPase activity, and the inhibitory effect of GBP2 was disrupted in the GTP-binding-impaired mutant GBP2K51A. This study is the first to demonstrate the inhibitory effect of GBP2 on ECTV, and it offers insights into innovative antiviral strategies.
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Affiliation(s)
- Zhenzhen Gao
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Zejing Meng
- School of Public Health, Lanzhou University, Lanzhou 730000, China;
| | - Xiaobing He
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Guohua Chen
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Yongxiang Fang
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Huihui Tian
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Hui Zhang
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
| | - Zhizhong Jing
- State Key Laboratory for Animal Disease Control and Prevention, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China; (Z.G.); (X.H.); (G.C.); (Y.F.); (H.T.); (H.Z.)
- Ministry of Agriculture Key Laboratory of Veterinary Public Health, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
- School of Public Health, Lanzhou University, Lanzhou 730000, China;
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16
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Tian Z, Zhang H, Yu R, Du J, Gao S, Wang Q, Guan G, Yin H. The GTPase activity and isoprenylation of Swine GBP1 are critical for inhibiting the production of Japanese Encephalitis Virus. Vet Microbiol 2023; 284:109843. [PMID: 37540998 DOI: 10.1016/j.vetmic.2023.109843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 07/28/2023] [Accepted: 07/30/2023] [Indexed: 08/06/2023]
Abstract
Japanese encephalitis virus (JEV) is a flavivirus that cause severe neurological deficits. The guanylate-binding protein 1 (GBP1) gene is an interferon-stimulated gene and exerts antiviral functions on many RNA and DNA viruses via diverse mechanisms, however, the roles and the action modes of GBP1 in the antiviral effect on the production of JEV RNA and infectious virions remain to be clarified. In this study, we found that the RNA levels of swine GBP1 (sGBP1) in PK15 cells were up-regulated at the late stage of JEV infection. The overexpression of sGBP1 significantly inhibited the production of JEV while the knockdown of sGBP1 promoted the production of JEV. The GTPase activity and isoprenylation of sGBP1 both are critical for anti-JEV activity. The GTPase activity of sGBP1 is responsible for inhibiting the production of JEV genomic RNA. The isoprenylation of sGBP1 inhibited the expression and cleavage of JEV prM to decrease the yields of infectious virions, which may be associated with the interaction between sGBP1 and cellular proprotein convertase furin. Taken together, the study dissected the action modes of sGBP1with potent anti-JEV activity in more details.
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Affiliation(s)
- Zhancheng Tian
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China.
| | - Hongge Zhang
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China
| | - Ruiming Yu
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China
| | - Junzheng Du
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China
| | - Shandian Gao
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China
| | - Qiongjie Wang
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China
| | - Guiquan Guan
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China
| | - Hong Yin
- State Key Laboratory for Animal Disease Control and Prevention, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, PR China; Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, PR China
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17
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Safi R, Sánchez-Álvarez M, Bosch M, Demangel C, Parton RG, Pol A. Defensive-lipid droplets: Cellular organelles designed for antimicrobial immunity. Immunol Rev 2023; 317:113-136. [PMID: 36960679 DOI: 10.1111/imr.13199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Microbes have developed many strategies to subvert host organisms, which, in turn, evolved several innate immune responses. As major lipid storage organelles of eukaryotes, lipid droplets (LDs) are an attractive source of nutrients for invaders. Intracellular viruses, bacteria, and protozoan parasites induce and physically interact with LDs, and the current view is that they "hijack" LDs to draw on substrates for host colonization. This dogma has been challenged by the recent demonstration that LDs are endowed with a protein-mediated antibiotic activity, which is upregulated in response to danger signals and sepsis. Dependence on host nutrients could be a generic "Achilles' heel" of intracellular pathogens and LDs a suitable chokepoint harnessed by innate immunity to organize a front-line defense. Here, we will provide a brief overview of the state of the conflict and discuss potential mechanisms driving the formation of the 'defensive-LDs' functioning as hubs of innate immunity.
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Affiliation(s)
- Rémi Safi
- Lipid Trafficking and Disease Group, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
- Josep Carreras Leukemia Research Institute, Barcelona, Spain
| | - Miguel Sánchez-Álvarez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
- Instituto de Investigaciones Biomédicas Alberto Sols (IIB), Madrid, Spain
| | - Marta Bosch
- Lipid Trafficking and Disease Group, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
- Department of Biomedical Sciences, Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Caroline Demangel
- Immunobiology and Therapy Unit, Institut Pasteur, Université Paris Cité, INSERM U1224, Paris, France
| | - Robert G Parton
- Institute for Molecular Bioscience (IMB), Brisbane, Queensland, Australia
- Centre for Microscopy and Microanalysis (CMM), University of Queensland, Brisbane, Queensland, Australia
| | - Albert Pol
- Lipid Trafficking and Disease Group, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
- Department of Biomedical Sciences, Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
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18
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Kurhade C, Kang S, Biering SB, Hwang S, Randall G. CAPRIN1 Is Required for Control of Viral Replication Complexes by Interferon Gamma. mBio 2023; 14:e0017223. [PMID: 37052473 PMCID: PMC10294620 DOI: 10.1128/mbio.00172-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 03/13/2023] [Indexed: 04/14/2023] Open
Abstract
Replication complexes (RCs), formed by positive-strand (+) RNA viruses through rearrangements of host endomembranes, protect their replicating RNA from host innate immune defenses. We have shown that two evolutionarily conserved defense systems, autophagy and interferon (IFN), target viral RCs and inhibit viral replication collaboratively. However, the mechanism by which autophagy proteins target viral RCs and the role of IFN-inducible GTPases in the disruption of RCs remains poorly understood. Here, using murine norovirus (MNV) as a model (+) RNA virus, we show that the guanylate binding protein 1 (GBP1) is the human GTPase responsible for inhibiting RCs. Furthermore, we found that ATG16L1 mediates the LC3 targeting of MNV RC by binding to WIPI2B and CAPRIN1, and that IFN gamma-mediated control of MNV replication was dependent on CAPRIN1. Collectively, this study identifies a novel mechanism for the autophagy machinery-mediated recognition and inhibition of viral RCs, a hallmark of (+) RNA virus replication. IMPORTANCE Replication complexes provide a microenvironment important for (+) RNA virus replication and shield it from host immune response. Previously we have shown that interferon gamma (IFNG) disrupts the RC of MNV via evolutionarily conserved autophagy proteins and IFN-inducible GTPases. Elucidating the mechanism of targeting of viral RC by ATG16L1 and IFN-induced GTPase will pave the way for development of therapeutics targeting the viral replication complexes. Here, we have identified GBP1 as the sole GBP targeting viral RC and uncovered the novel role of CAPRIN1 in recruiting ATG16L1 to the viral RC.
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Affiliation(s)
- Chaitanya Kurhade
- Department of Microbiology, The University of Chicago, Chicago, Illinois, USA
| | - Soowon Kang
- Department of Microbiology, The University of Chicago, Chicago, Illinois, USA
| | - Scott B. Biering
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Seungmin Hwang
- Department of Pathology, The University of Chicago, Chicago, Illinois, USA
| | - Glenn Randall
- Department of Microbiology, The University of Chicago, Chicago, Illinois, USA
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19
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Buijze H, Brinkmann V, Hurwitz R, Dorhoi A, Kaufmann SHE, Pei G. Human GBP1 Is Involved in the Repair of Damaged Phagosomes/Endolysosomes. Int J Mol Sci 2023; 24:ijms24119701. [PMID: 37298652 DOI: 10.3390/ijms24119701] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/25/2023] [Accepted: 05/27/2023] [Indexed: 06/12/2023] Open
Abstract
Mouse guanylate-binding proteins (mGBPs) are recruited to various invasive pathogens, thereby conferring cell-autonomous immunity against these pathogens. However, whether and how human GBPs (hGBPs) target M. tuberculosis (Mtb) and L. monocytogenes (Lm) remains unclear. Here, we describe hGBPs association with intracellular Mtb and Lm, which was dependent on the ability of bacteria to induce disruption of phagosomal membranes. hGBP1 formed puncta structures which were recruited to ruptured endolysosomes. Furthermore, both GTP-binding and isoprenylation of hGBP1 were required for its puncta formation. hGBP1 was required for the recovery of endolysosomal integrity. In vitro lipid-binding assays demonstrated direct binding of hGBP1 to PI4P. Upon endolysosomal damage, hGBP1 was targeted to PI4P and PI(3,4)P2-positive endolysosomes in cells. Finally, live-cell imaging demonstrated that hGBP1 was recruited to damaged endolysosomes, and consequently mediated endolysosomal repair. In summary, we uncover a novel interferon-inducible mechanism in which hGBP1 contributes to the repair of damaged phagosomes/endolysosomes.
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Affiliation(s)
- Hellen Buijze
- Department of Immunology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany
| | - Volker Brinkmann
- Microscopy Core Facility, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany
| | - Robert Hurwitz
- Protein Purification Facility, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany
| | - Anca Dorhoi
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, 17493 Greifswald, Germany
- Faculty of Mathematics and Natural Sciences, University of Greifswald, 17489 Greifswald, Germany
| | - Stefan H E Kaufmann
- Department of Immunology, Max Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany
- Emeritus Group of Systems Immunology, Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany
- Hagler Institute for Advanced Study, Texas A&M University, College Station, TX 77843, USA
| | - Gang Pei
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, 17493 Greifswald, Germany
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20
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Reimann TM, Müdsam C, Schachtler C, Ince S, Sticht H, Herrmann C, Stürzl M, Kost B. The large GTPase AtGBPL3 links nuclear envelope formation and morphogenesis to transcriptional repression. NATURE PLANTS 2023; 9:766-784. [PMID: 37095224 DOI: 10.1038/s41477-023-01400-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 03/24/2023] [Indexed: 05/03/2023]
Abstract
Guanylate binding proteins (GBPs) are prominent regulators of immunity not known to be required for nuclear envelope formation and morphogenesis. Here we identify the Arabidopsis GBP orthologue AtGBPL3 as a lamina component with essential functions in mitotic nuclear envelope reformation, nuclear morphogenesis and transcriptional repression during interphase. AtGBPL3 is preferentially expressed in mitotically active root tips, accumulates at the nuclear envelope and interacts with centromeric chromatin as well as with lamina components transcriptionally repressing pericentromeric chromatin. Reduced expression of AtGBPL3 or associated lamina components similarly altered nuclear morphology and caused overlapping transcriptional deregulation. Investigating the dynamics of AtGBPL3-GFP and other nuclear markers during mitosis (1) revealed that AtGBPL3 accumulation on the surface of daughter nuclei precedes nuclear envelope reformation and (2) uncovered defects in this process in roots of AtGBPL3 mutants, which cause programmed cell death and impair growth. AtGBPL3 functions established by these observations are unique among dynamin-family large GTPases.
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Affiliation(s)
- Theresa Maria Reimann
- Cell Biology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Christina Müdsam
- Cell Biology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Christina Schachtler
- Cell Biology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
- Molecular and Experimental Surgery, Department of Surgery, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Semra Ince
- Physical and Biophysical Chemistry, Department of Physical Chemistry 1, Ruhr-Universität Bochum (RUB), Bochum, Germany
| | - Heinrich Sticht
- Bioinformatics, Institute of Biochemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Christian Herrmann
- Physical and Biophysical Chemistry, Department of Physical Chemistry 1, Ruhr-Universität Bochum (RUB), Bochum, Germany
| | - Michael Stürzl
- Molecular and Experimental Surgery, Department of Surgery, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Benedikt Kost
- Cell Biology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany.
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21
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Dickinson M, Kutsch M, Sistemich L, Hernandez D, Piro A, Needham D, Lesser C, Herrmann C, Coers J. LPS-aggregating proteins GBP1 and GBP2 are each sufficient to enhance caspase-4 activation both in cellulo and in vitro. Proc Natl Acad Sci U S A 2023; 120:e2216028120. [PMID: 37023136 PMCID: PMC10104521 DOI: 10.1073/pnas.2216028120] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 02/26/2023] [Indexed: 04/07/2023] Open
Abstract
The gamma-interferon (IFNγ)-inducible guanylate-binding proteins (GBPs) promote host defense against gram-negative cytosolic bacteria in part through the induction of an inflammatory cell death pathway called pyroptosis. To activate pyroptosis, GBPs facilitate sensing of the gram-negative bacterial outer membrane component lipopolysaccharide (LPS) by the noncanonical caspase-4 inflammasome. There are seven human GBP paralogs, and it is unclear how each GBP contributes to LPS sensing and pyroptosis induction. GBP1 forms a multimeric microcapsule on the surface of cytosolic bacteria through direct interactions with LPS. The GBP1 microcapsule recruits caspase-4 to bacteria, a process deemed essential for caspase-4 activation. In contrast to GBP1, closely related paralog GBP2 is unable to bind bacteria on its own but requires GBP1 for direct bacterial binding. Unexpectedly, we find that GBP2 overexpression can restore gram-negative-induced pyroptosis in GBP1KO cells, without GBP2 binding to the bacterial surface. A mutant of GBP1 that lacks the triple arginine motif required for microcapsule formation also rescues pyroptosis in GBP1KO cells, showing that binding to bacteria is dispensable for GBPs to promote pyroptosis. Instead, we find that GBP2, like GBP1, directly binds and aggregates "free" LPS through protein polymerization. We demonstrate that supplementation of either recombinant polymerized GBP1 or GBP2 to an in vitro reaction is sufficient to enhance LPS-induced caspase-4 activation. This provides a revised mechanistic framework for noncanonical inflammasome activation where GBP1 or GBP2 assembles cytosol-contaminating LPS into a protein-LPS interface for caspase-4 activation as part of a coordinated host response to gram-negative bacterial infections.
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Affiliation(s)
- Mary S. Dickinson
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC27710
| | - Miriam Kutsch
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC27710
| | - Linda Sistemich
- Department of Physical Chemistry I, Ruhr-University Bochum, 44801Bochum, Germany
| | - Dulcemaria Hernandez
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC27710
| | - Anthony S. Piro
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC27710
| | - David Needham
- Department of Mechanical Engineering and Material Science, Duke University, Durham, NC27708
| | - Cammie F. Lesser
- Center for Bacterial Pathogenesis, Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA02139
- Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, MA02115
| | - Christian Herrmann
- Department of Physical Chemistry I, Ruhr-University Bochum, 44801Bochum, Germany
| | - Jörn Coers
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC27710
- Department of Immunology, Duke University Medical Center, Durham, NC27710
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22
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Schelle L, Côrte-Real JV, Esteves PJ, Abrantes J, Baldauf HM. Functional cross-species conservation of guanylate-binding proteins in innate immunity. Med Microbiol Immunol 2023; 212:141-152. [PMID: 35416510 PMCID: PMC9005921 DOI: 10.1007/s00430-022-00736-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 03/25/2022] [Indexed: 11/29/2022]
Abstract
Guanylate binding proteins (GBPs) represent an evolutionary ancient protein family widely distributed among eukaryotes. They are interferon (IFN)-inducible guanosine triphosphatases that belong to the dynamin superfamily. GBPs are known to have a major role in the cell-autonomous innate immune response against bacterial, parasitic and viral infections and are also involved in inflammasome activation. Evolutionary studies depicted that GBPs present a pattern of gain and loss of genes in each family with several genes pseudogenized and some genes more divergent, indicative for the birth-and-death evolution process. Most species harbor large GBP gene clusters encoding multiple paralogs. Previous functional studies mainly focused on mouse and human GBPs, but more data are becoming available, broadening the understanding of this multifunctional protein family. In this review, we will provide new insights and give a broad overview about GBP evolution, conservation and their roles in all studied species, including plants, invertebrates and vertebrates, revealing how far the described features of GBPs can be transferred to other species.
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Affiliation(s)
- Luca Schelle
- Faculty of Medicine, Max Von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, LMU München, Feodor-Lynen-Str. 23, 81377, Munich, Germany
| | - João Vasco Côrte-Real
- Faculty of Medicine, Max Von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, LMU München, Feodor-Lynen-Str. 23, 81377, Munich, Germany
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, 4485-661, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661, Vairão, Portugal
| | - Pedro José Esteves
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, 4485-661, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661, Vairão, Portugal
- CITS-Center of Investigation in Health Technologies, CESPU, 4585-116, Gandra, Portugal
| | - Joana Abrantes
- CIBIO-InBIO, Research Center in Biodiversity and Genetic Resources, University of Porto, 4485-661, Vairão, Portugal
- Department of Biology, Faculty of Sciences, University of Porto, 4169-007, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, 4485-661, Vairão, Portugal
| | - Hanna-Mari Baldauf
- Faculty of Medicine, Max Von Pettenkofer Institute and Gene Center, Virology, National Reference Center for Retroviruses, LMU München, Feodor-Lynen-Str. 23, 81377, Munich, Germany.
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23
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Valeva SV, Degabriel M, Michal F, Gay G, Rohde JR, Randow F, Lagrange B, Henry T. Comparative study of GBP recruitment on two cytosol-dwelling pathogens, Francisella novicida and Shigella flexneri highlights differences in GBP repertoire and in GBP1 motif requirements. Pathog Dis 2023; 81:ftad005. [PMID: 37012222 DOI: 10.1093/femspd/ftad005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
Guanylate-Binding Proteins are interferon-inducible GTPases that play a key role in cell autonomous responses against intracellular pathogens. Despite sharing high sequence similarity, subtle differences among GBPs translate into functional divergences that are still largely not understood. A key GBP feature is the formation of supramolecular GBP complexes on the bacterial surface. Such complexes are observed when GBP1 binds lipopolysaccharide (LPS) from Shigella and Salmonella and further recruits GBP2-4. Here, we compared GBP recruitment on two cytosol-dwelling pathogens, Francisella novicida and S. flexneri. Francisella novicida was coated by GBP1 and GBP2 and to a lower extent by GBP4 in human macrophages. Contrary to S. flexneri, F. novicida was not targeted by GBP3, a feature independent of T6SS effectors. Multiple GBP1 features were required to promote targeting to F. novicida while GBP1 targeting to S. flexneri was much more permissive to GBP1 mutagenesis suggesting that GBP1 has multiple domains that cooperate to recognize F. novicida atypical LPS. Altogether our results indicate that the repertoire of GBPs recruited onto specific bacteria is dictated by GBP-specific features and by specific bacterial factors that remain to be identified.
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Affiliation(s)
- Stanimira V Valeva
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ Lyon, F-69007, Lyon, France
| | - Manon Degabriel
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ Lyon, F-69007, Lyon, France
| | - Fanny Michal
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ Lyon, F-69007, Lyon, France
| | - Gabrielle Gay
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ Lyon, F-69007, Lyon, France
| | - John R Rohde
- Department of Microbiology and Immunology, Dalhousie University, Halifax, B3H 4R2, NS, Canada
| | - Felix Randow
- Division of Protein and Nucleic Acid Chemistry, MRC Laboratory of Molecular Biology, CB2 0QH, Cambridge, United Kingdom
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, CB2 0QH, Cambridge, United Kingdom
| | - Brice Lagrange
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ Lyon, F-69007, Lyon, France
| | - Thomas Henry
- CIRI, Centre International de Recherche en Infectiologie, Univ Lyon, Inserm U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, ENS de Lyon, Univ Lyon, F-69007, Lyon, France
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24
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Duan H, Dong H, Wu S, Ren J, Zhang M, Chen C, Du Y, Zhang G, Zhang A. Porcine reproductive and respiratory syndrome virus non-structural protein 4 cleaves guanylate-binding protein 1 via its cysteine proteinase activity to antagonize GBP1 antiviral effect. Vet Res 2022; 53:55. [PMID: 35804432 PMCID: PMC9264745 DOI: 10.1186/s13567-022-01071-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/10/2022] [Indexed: 11/12/2022] Open
Abstract
Porcine reproductive and respiratory syndrome (PRRS) is a highly infectious disease caused by PRRS virus (PRRSV) that causes great economic losses to the swine industry worldwide. PRRSV has been recognized to modulate the host antiviral interferon (IFN) response and downstream interferon-stimulated gene expression to intercept the antiviral effect of host cells. Guanylate-binding proteins (GBPs) are IFN-inducible GTPases that exert broad antiviral activity against several DNA and RNA viruses, of which GBP1 is considered to play a pivotal role. However, the role of GBP1 in PRRSV replication remains unknown. The present study showed that overexpression of GBP1 notably inhibited PRRSV infection, while the knockdown of endogenous GBP1 promoted PRRSV infection. The K51 and R48 residues of GBP1 were essential for the suppression of PRRSV replication. Furthermore, GBP1 abrogated PRRSV replication by disrupting normal fibrous actin structures, which was indispensable for effective PRRSV replication. By using a co-immunoprecipitation assay, we found that GBP1 interacted with the non-structural protein 4 (nsp4) protein of PRRSV, and this interaction was mapped to the N-terminal globular GTPase domain of GBP1 and amino acids 1–69 of nsp4. PRRSV infection significantly downregulated GBP1 protein expression in Marc-145 cells, and nsp4, a 3C-like serine proteinase, was responsible for GBP1 cleavage, and the cleaved site was located at glutamic acid 338 of GBP1. Additionally, the anti-PRRSV activity of GBP1 was antagonized by nsp4. Taken together, these findings expand our understanding of the sophisticated interaction between PRRSV and host cells, PRRSV pathogenesis and its mechanisms of evading the host immune response.
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Affiliation(s)
- Hong Duan
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Haoxin Dong
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.,International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Shuya Wu
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.,International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Jiahui Ren
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.,International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Mingfang Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Chuangwei Chen
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Yongkun Du
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.,International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Gaiping Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China.,International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, 450046, Henan, China
| | - Angke Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, 450046, Henan, China. .,International Joint Research Center of National Animal Immunology, Henan Agricultural University, Zhengzhou, 450046, Henan, China.
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Hunt EN, Kopacz JP, Vestal DJ. Unraveling the Role of Guanylate-Binding Proteins (GBPs) in Breast Cancer: A Comprehensive Literature Review and New Data on Prognosis in Breast Cancer Subtypes. Cancers (Basel) 2022; 14:cancers14112794. [PMID: 35681772 PMCID: PMC9179834 DOI: 10.3390/cancers14112794] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 11/19/2022] Open
Abstract
At least one member of the Guanylate-Binding Protein (GBP) family of large interferon-induced GTPases has been classified as both a marker of good prognosis and as a potential drug target to treat breast cancers. However, the activity of individual GBPs appears to not just be tumor cell type–specific but dependent on the growth factor and/or cytokine environment in which the tumor cells reside. To clarify what we do and do not know about GBPs in breast cancer, the current literature on GBP-1, GBP-2, and GBP-5 in breast cancer has been assembled. In addition, we have analyzed the role of each of these GBPs in predicting recurrence-free survival (RFS), overall survival (OS), and distance metastasis-free survival (DMFS) as single gene products in different subtypes of breast cancers. When a large cohort of breast cancers of all types and stages were examined, GBP-1 correlated with poor RFS. However, it was the only GBP to do so. When smaller cohorts of breast cancer subtypes grouped into ER+, ER+/Her2-, and HER2+ tumors were analyzed, none of the GBPs influenced RFS, OS, or DMSF as single agents. The exception is GBP-5, which correlated with improved RFS in Her2+ breast cancers. All three GBPs individually predicted improved RFS, OS, and DMSF in ER- breast cancers, regardless of the PR or HER2 status, and TNBCs.
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Guanylate-Binding Protein 1 Regulates Infection-Induced Autophagy through TBK1 Phosphorylation. Cell Microbiol 2022. [DOI: 10.1155/2022/8612113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Invading bacteria can be degraded by selective autophagy, known as xenophagy. Recent studies have shown that the recruitment of autophagy adaptor proteins such as p62 to bacteria and its regulation by activated TANK-binding kinase 1 (TBK1) are required to overcome bacterial infection. However, the detailed molecular mechanisms behind this are not yet fully understood. Here, we show that the human guanylate-binding protein (GBP) family, especially GBP1, directs xenophagy against invading Group A Streptococcus (GAS) by promoting TBK1 phosphorylation. GBP1 exhibits a GAS-surrounding localization response to bacterially caused membrane damage mediated by the membrane damage sensor galectin-3. We found that GBP1 knockout attenuated TBK1 activation, followed by reduced p62 recruitment and lower bactericidal activity by xenophagy. Furthermore, GBP1-TBK1 interaction was detected by immunoprecipitation. Our findings collectively indicate that GBP1 contributes to GAS-targeted autophagy initiated by membrane damage detection by galectin-3 via TBK1 phosphorylation.
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Chen G, Chen D, Feng Y, Wu W, Gao J, Chang C, Chen S, Zhen G. Identification of Key Signaling Pathways and Genes in Eosinophilic Asthma and Neutrophilic Asthma by Weighted Gene Co-Expression Network Analysis. Front Mol Biosci 2022; 9:805570. [PMID: 35187081 PMCID: PMC8847715 DOI: 10.3389/fmolb.2022.805570] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/10/2022] [Indexed: 12/14/2022] Open
Abstract
Background: Asthma is a heterogeneous disease with different subtypes including eosinophilic asthma (EA) and neutrophilic asthma (NA). However, the mechanisms underlying the difference between the two subtypes are not fully understood.Methods: Microarray datasets (GSE45111 and GSE137268) were acquired from Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) in induced sputum between EA (n = 24) and NA (n = 15) were identified by “Limma” package. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses and Gene set enrichment analysis (GSEA) were used to explore potential signaling pathways. Weighted gene co-expression network analysis (WGCNA) were performed to identify the key genes that were strongly associated with EA and NA.Results: A total of 282 DEGs were identified in induced sputum of NA patients compared with EA patients. In GO and KEGG pathway analyses, DEGs were enriched in positive regulation of cytokine production, and cytokine-cytokine receptor interaction. The results of GSEA showed that ribosome, Parkinson’s disease, and oxidative phosphorylation were positively correlated with EA while toll-like receptor signaling pathway, primary immunodeficiency, and NOD-like receptor signaling pathway were positively correlated with NA. Using WGCNA analysis, we identified a set of genes significantly associated NA including IRFG, IRF1, STAT1, IFIH1, IFIT3, GBP1, GBP5, IFIT2, CXCL9, and CXCL11.Conclusion: We identified potential signaling pathways and key genes involved in the pathogenesis of the asthma subsets, especially in neutrophilic asthma.
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Affiliation(s)
- Gongqi Chen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Dian Chen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Yuchen Feng
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Wenliang Wu
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Jiali Gao
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Chenli Chang
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Shengchong Chen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
| | - Guohua Zhen
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Respiratory Diseases, National Health Commission of People’s Republic of China, National Clinical Research Center for Respiratory Diseases, Wuhan, China
- *Correspondence: Guohua Zhen,
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Fisch D, Clough B, Khan R, Healy L, Frickel EM. Toxoplasma-proximal and distal control by GBPs in human macrophages. Pathog Dis 2022; 79:ftab058. [PMID: 34931666 PMCID: PMC8752258 DOI: 10.1093/femspd/ftab058] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 12/17/2021] [Indexed: 11/13/2022] Open
Abstract
Human guanylate binding proteins (GBPs) are key players of interferon-gamma (IFNγ)-induced cell intrinsic defense mechanisms targeting intracellular pathogens. In this study, we combine the well-established Toxoplasmagondii infection model with three in vitro macrophage culture systems to delineate the contribution of individual GBP family members to control this apicomplexan parasite. Use of high-throughput imaging assays and genome engineering allowed us to define a role for GBP1, 2 and 5 in parasite infection control. While GBP1 performs a pathogen-proximal, parasiticidal and growth-restricting function through accumulation at the parasitophorous vacuole of intracellular Toxoplasma, GBP2 and GBP5 perform a pathogen-distal, growth-restricting role. We further find that mutants of the GTPase or isoprenylation site of GBP1/2/5 affect their normal function in Toxoplasma control by leading to mis-localization of the proteins.
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Affiliation(s)
- Daniel Fisch
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Barbara Clough
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Rabia Khan
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Lyn Healy
- HESCU (Human Embryo and Stem Cell Unit), The Francis Crick Institute, London NW1 1AT, UK
| | - Eva-Maria Frickel
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK
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29
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Kutsch M, Coers J. Human guanylate binding proteins: nanomachines orchestrating host defense. FEBS J 2021; 288:5826-5849. [PMID: 33314740 PMCID: PMC8196077 DOI: 10.1111/febs.15662] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 11/27/2020] [Accepted: 12/07/2020] [Indexed: 02/06/2023]
Abstract
Disease-causing microorganisms not only breach anatomical barriers and invade tissues but also frequently enter host cells, nutrient-enriched environments amenable to support parasitic microbial growth. Protection from many infectious diseases is therefore reliant on the ability of individual host cells to combat intracellular infections through the execution of cell-autonomous defense programs. Central players in human cell-autonomous immunity are members of the family of dynamin-related guanylate binding proteins (GBPs). The importance of these interferon-inducible GTPases in host defense to viral, bacterial, and protozoan pathogens has been established for some time; only recently, cell biological and biochemical studies that largely focused on the prenylated paralogs GBP1, GBP2, and GBP5 have provided us with robust molecular frameworks for GBP-mediated immunity. Specifically, the recent characterization of GBP1 as a bona fide pattern recognition receptor for bacterial lipopolysaccharide (LPS) disrupting the integrity of bacterial outer membranes through LPS aggregation, the discovery of a link between hydrolysis-induced GMP production by GBP1 and inflammasome activation, and the classification of GBP2 and GBP5 as inhibitors of viral envelope glycoprotein processing via suppression of the host endoprotease furin have paved the way for a vastly improved conceptual understanding of the molecular mechanisms by which GBP nanomachines execute cell-autonomous immunity. The herein discussed models incorporate our current knowledge of the antimicrobial, proinflammatory, and biochemical properties of human GBPs and thereby provide testable hypotheses that will guide future studies into the intricacies of GBP-controlled host defense and their role in human disease.
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Affiliation(s)
- Miriam Kutsch
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 22710, USA
| | - Jörn Coers
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina 22710, USA
- Department of Immunology, Duke University Medical Center, Durham, North Carolina 22710, USA
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30
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Rafeld HL, Kolanus W, van Driel IR, Hartland EL. Interferon-induced GTPases orchestrate host cell-autonomous defence against bacterial pathogens. Biochem Soc Trans 2021; 49:1287-1297. [PMID: 34003245 PMCID: PMC8286824 DOI: 10.1042/bst20200900] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/27/2021] [Accepted: 04/30/2021] [Indexed: 01/08/2023]
Abstract
Interferon (IFN)-induced guanosine triphosphate hydrolysing enzymes (GTPases) have been identified as cornerstones of IFN-mediated cell-autonomous defence. Upon IFN stimulation, these GTPases are highly expressed in various host cells, where they orchestrate anti-microbial activities against a diverse range of pathogens such as bacteria, protozoan and viruses. IFN-induced GTPases have been shown to interact with various host pathways and proteins mediating pathogen control via inflammasome activation, destabilising pathogen compartments and membranes, orchestrating destruction via autophagy and the production of reactive oxygen species as well as inhibiting pathogen mobility. In this mini-review, we provide an update on how the IFN-induced GTPases target pathogens and mediate host defence, emphasising findings on protection against bacterial pathogens.
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Affiliation(s)
- Heike L. Rafeld
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
- Life and Medical Sciences Institute (LIMES), Molecular Immunology and Cell Biology, University of Bonn, Bonn, Germany
| | - Waldemar Kolanus
- Life and Medical Sciences Institute (LIMES), Molecular Immunology and Cell Biology, University of Bonn, Bonn, Germany
| | - Ian R. van Driel
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victoria, Australia
| | - Elizabeth L. Hartland
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, Victoria, Australia
- Department of Molecular and Translational Science, Monash University, Clayton, Victoria, Australia
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31
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Xavier A, Al-Zeer MA, Meyer TF, Daumke O. hGBP1 Coordinates Chlamydia Restriction and Inflammasome Activation through Sequential GTP Hydrolysis. Cell Rep 2021; 31:107667. [PMID: 32433976 DOI: 10.1016/j.celrep.2020.107667] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 03/18/2020] [Accepted: 04/28/2020] [Indexed: 11/26/2022] Open
Abstract
Human guanylate binding protein 1 (hGBP1) belongs to the dynamin superfamily of GTPases and conveys host defense against intracellular bacteria and parasites. During infection, hGBP1 is recruited to pathogen-containing vacuoles, such as Chlamydia trachomatis inclusions, restricts pathogenic growth, and induces the activation of the inflammasome pathway. hGBP1 has a unique catalytic activity to hydrolyze guanosine triphosphate (GTP) to guanosine monophosphate (GMP) in two consecutive cleavage steps. However, the functional significance of this activity in host defense remains elusive. Here, we generate a structure-guided mutant that specifically abrogates GMP production, while maintaining fast cooperative GTP hydrolysis. Complementation experiments in human monocytes/macrophages show that hGBP1-mediated GMP production is dispensable for restricting Chlamydia trachomatis growth but is necessary for inflammasome activation. Mechanistically, GMP is catabolized to uric acid, which in turn activates the NLRP3 inflammasome. Our study demonstrates that the unique enzymology of hGBP1 coordinates bacterial growth restriction and inflammasome signaling.
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Affiliation(s)
- Audrey Xavier
- Crystallography, Max Delbrück Center for Molecular Medicine, Robert-Rössle Str. 10, 13125 Berlin, Germany; Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany; Department of Molecular Biology, Max-Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany
| | - Munir A Al-Zeer
- Department of Molecular Biology, Max-Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany; Institute of Biotechnology, TIB 4/3-2, Department of Applied Biochemistry, Technical University of Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | - Thomas F Meyer
- Department of Molecular Biology, Max-Planck Institute for Infection Biology, Charitéplatz 1, 10117 Berlin, Germany
| | - Oliver Daumke
- Crystallography, Max Delbrück Center for Molecular Medicine, Robert-Rössle Str. 10, 13125 Berlin, Germany; Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany.
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32
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Structural basis for GTP-induced dimerization and antiviral function of guanylate-binding proteins. Proc Natl Acad Sci U S A 2021; 118:2022269118. [PMID: 33876762 DOI: 10.1073/pnas.2022269118] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Guanylate-binding proteins (GBPs) form a family of dynamin-related large GTPases which mediate important innate immune functions. They were proposed to form oligomers upon GTP binding/hydrolysis, but the molecular mechanisms remain elusive. Here, we present crystal structures of C-terminally truncated human GBP5 (hGBP51-486), comprising the large GTPase (LG) and middle (MD) domains, in both its nucleotide-free monomeric and nucleotide-bound dimeric states, together with nucleotide-free full-length human GBP2. Upon GTP-loading, hGBP51-486 forms a closed face-to-face dimer. The MD of hGBP5 undergoes a drastic movement relative to its LG domain and forms extensive interactions with the LG domain and MD of the pairing molecule. Disrupting the MD interface (for hGBP5) or mutating the hinge region (for hGBP2/5) impairs their ability to inhibit HIV-1. Our results point to a GTP-induced dimerization mode that is likely conserved among all GBP members and provide insights into the molecular determinants of their antiviral function.
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33
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Identification of the interferon-inducible GTPase GBP1 as major restriction factor for the Hepatitis E virus. J Virol 2021; 95:JVI.01564-20. [PMID: 33472929 PMCID: PMC8092694 DOI: 10.1128/jvi.01564-20] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
This study aims to gain deeper insight into HEV-induced innate immunity by characterizing the crosstalk between the virus and the host factor guanylate-binding protein 1 (GBP1). We observe that the amount of GBP1 is elevated upon infection, although number of transcripts is decreased, which is explained by a prolonged protein half-life. Modulation of GBP1 levels via overexpression significantly inhibits the viral life cycle. Use of various GBP-1 mutants revealed that the antiviral effect of GBP-1 on HEV is independent from the GTPase-activity, but depends on the capacity of GBP-1 to form GBP1 homodimers. This connects GBP-1 to the autophagosomal pathway. Indeed, dimerization competent GBP1 targets the viral capsid protein to the lysosomal compartment leading to inactivation of the viral particle. Most importantly, silencing of GBP1 abolishes the antiviral effect of IFNγ on HEV. In IFNγ treated cells the virus is targeted to lysosomal structures and destroyed therein. This process depends in part on GBP1. These observations about the relevance of GBP1 for type II interferon-mediated innate immunity against HEV could be a base for tailoring novel antivirals and improvement of disease management.IMPORTANCE Although HEV represents a worldwide public health problem with 20 million infections and 44.000 death cases per year, there are still no specific antivirals available and many aspects of the viral life cycle are not well understood. Here we identify the guanylate binding protein 1 (GBP1) as a restriction factor affecting life cycle of HEV. Surprisingly, the antiviral effect of GBP1 does not depend on its GTPase function, but on its capacity to homodimerize. We revealed that GBP1 exerts its antiviral activity by targeting HEV to the lysosomal compartment where the virus is inactivated. Most importantly, we observed that the antiviral effect of interferon-γ on HEV strongly depends on GBP1. Our observation that GBP1 impairs HEV and is crucial for the antiviral effect of interferons on HEV extends understanding of host defense-mechanisms. As the interferon-system represents a universal defense-mechanism, our study could help to design novel antivirals targeting.
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34
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Zhang R, Li Z, Tang YD, Su C, Zheng C. When human guanylate-binding proteins meet viral infections. J Biomed Sci 2021; 28:17. [PMID: 33673837 PMCID: PMC7934404 DOI: 10.1186/s12929-021-00716-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 03/01/2021] [Indexed: 12/23/2022] Open
Abstract
Innate immunity is the first line of host defense against viral infection. After invading into the cells, pathogen-associated-molecular-patterns derived from viruses are recognized by pattern recognition receptors to activate the downstream signaling pathways to induce the production of type I interferons (IFN-I) and inflammatory cytokines, which play critical functions in the host antiviral innate immune responses. Guanylate-binding proteins (GBPs) are IFN-inducible antiviral effectors belonging to the guanosine triphosphatases family. In addition to exerting direct antiviral functions against certain viruses, a few GBPs also exhibit regulatory roles on the host antiviral innate immunity. However, our understanding of the underlying molecular mechanisms of GBPs' roles in viral infection and host antiviral innate immune signaling is still very limited. Therefore, here we present an updated overview of the functions of GBPs during viral infection and in antiviral innate immunity, and highlight discrepancies in reported findings and current challenges for future studies, which will advance our understanding of the functions of GBPs and provide a scientific and theoretical basis for the regulation of antiviral innate immunity.
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Affiliation(s)
- Rongzhao Zhang
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, China
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Zhixin Li
- Fuzhou Medical College of Nanchang University, Fuzhou, Jiangxi, China
| | - Yan-Dong Tang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin, Heilongjiang, China
| | - Chenhe Su
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, China.
| | - Chunfu Zheng
- Department of Immunology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, China.
- Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB, Canada.
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35
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Sistemich L, Dimitrov Stanchev L, Kutsch M, Roux A, Günther Pomorski T, Herrmann C. Structural requirements for membrane binding of human guanylate-binding protein 1. FEBS J 2021; 288:4098-4114. [PMID: 33405388 DOI: 10.1111/febs.15703] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 11/25/2020] [Accepted: 12/29/2020] [Indexed: 12/14/2022]
Abstract
Human guanylate-binding protein 1 (hGBP1) is a key player in innate immunity and fights diverse intracellular microbial pathogens. Its antimicrobial functions depend on hGBP1's GTP binding- and hydrolysis-induced abilities to form large, structured polymers and to attach to lipid membranes. Crucial for both of these biochemical features is the nucleotide-controlled release of the C terminally located farnesyl moiety. Here, we address molecular details of the hGBP1 membrane binding mechanism by employing recombinant, fluorescently labeled hGBP1, and artificial membranes. We demonstrate the importance of the GTPase activity and the resulting structural rearrangement of the hGBP1 molecule, which we term the open state. This open state is supported and stabilized by homodimer contacts involving the middle domain of the protein and is further stabilized by binding to the lipid bilayer surface. We show that on the surface of the lipid bilayer a hGBP1 monolayer is built in a pins in a pincushion-like arrangement with the farnesyl tail integrated in the membrane and the N-terminal GTPase domain facing outwards. We suggest that similar intramolecular contacts between neighboring hGBP1 molecules are responsible for both polymer formation and monolayer formation on lipid membranes. Finally, we show that tethering of large unilamellar vesicles occurs after the vesicle surface is fully covered by the monolayer. Both hGBP1 polymer formation and hGBP1-induced vesicle tethering have implications for understanding the molecular mechanism of combating bacterial pathogens. DATABASES: Structural data are available in RCSB Protein Data Bank under the accession numbers: 6K1Z, 2D4H.
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Affiliation(s)
- Linda Sistemich
- Faculty of Chemistry and Biochemistry, Physical Chemistry I, Ruhr-University Bochum, Bochum, Germany
| | - Lyubomir Dimitrov Stanchev
- Faculty of Chemistry and Biochemistry, Molecular Biochemistry, Ruhr University Bochum, Bochum, Germany.,Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Miriam Kutsch
- Faculty of Chemistry and Biochemistry, Physical Chemistry I, Ruhr-University Bochum, Bochum, Germany.,Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, USA
| | - Aurélien Roux
- Biochemistry Department, University of Geneva, Geneva, Switzerland
| | - Thomas Günther Pomorski
- Faculty of Chemistry and Biochemistry, Molecular Biochemistry, Ruhr University Bochum, Bochum, Germany.,Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Christian Herrmann
- Faculty of Chemistry and Biochemistry, Physical Chemistry I, Ruhr-University Bochum, Bochum, Germany
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36
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Place DE, Malireddi RKS, Kim J, Vogel P, Yamamoto M, Kanneganti TD. Osteoclast fusion and bone loss are restricted by interferon inducible guanylate binding proteins. Nat Commun 2021; 12:496. [PMID: 33479228 PMCID: PMC7820603 DOI: 10.1038/s41467-020-20807-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/14/2020] [Indexed: 02/07/2023] Open
Abstract
Chronic inflammation during many diseases is associated with bone loss. While interferons (IFNs) are often inhibitory to osteoclast formation, the complex role that IFN and interferon-stimulated genes (ISGs) play in osteoimmunology during inflammatory diseases is still poorly understood. We show that mice deficient in IFN signaling components including IFN alpha and beta receptor 1 (IFNAR1), interferon regulatory factor 1 (IRF1), IRF9, and STAT1 each have reduced bone density and increased osteoclastogenesis compared to wild type mice. The IFN-inducible guanylate-binding proteins (GBPs) on mouse chromosome 3 (GBP1, GBP2, GBP3, GBP5, GBP7) are required to negatively regulate age-associated bone loss and osteoclastogenesis. Mechanistically, GBP2 and GBP5 both negatively regulate in vitro osteoclast differentiation, and loss of GBP5, but not GBP2, results in greater age-associated bone loss in mice. Moreover, mice deficient in GBP5 or chromosome 3 GBPs have greater LPS-mediated inflammatory bone loss compared to wild type mice. Overall, we find that GBP5 contributes to restricting age-associated and inflammation-induced bone loss by negatively regulating osteoclastogenesis.
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Affiliation(s)
- David E Place
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - R K Subbarao Malireddi
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Jieun Kim
- Center for In Vivo Imaging and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Peter Vogel
- Veterinary Pathology Core, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Masahiro Yamamoto
- Department of Immunoparasitology, Osaka University, 3-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
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37
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Wang F, Wang X, Song X, Ma L, Yang J, Liu Q, Liu J. Function of Neospora caninum dense granule protein 7 in innate immunity in mice. Parasitol Res 2020; 120:197-207. [PMID: 33164154 DOI: 10.1007/s00436-020-06961-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/02/2020] [Indexed: 11/28/2022]
Abstract
The intracellular parasite Neospora caninum can parasitize all nucleated cells of the host. Dense granule proteins (GRAs) secreted by dense granules are an important material involved in the formation of parasitophorous vacuoles (PVs), which facilitate parasite survival and replication in host cells. Due to the secretory and immune properties of NcGRA7, it is considered to be a promising serodiagnosis marker and an effective neosporosis vaccine candidate. However, the intracellular regulatory mechanisms involved in NcGRA7-induced host responses have rarely been examined. Here, we used the CRISPR/Cas9 genome editing system to obtain a NcGRA7 knockout strain (ΔNcGRA7) and a NcGRA7 complementary strain (iΔNcGRA7) to study their function. We found that ΔNcGRA7 exhibited slower growth in vitro and weakened virulence in mice compared with Nc1 and iΔNcGRA7. All parasite strains can stimulate host immune cells to produce IFN-γ, and the amount of IFN-γ production stimulated by Nc1 was significantly higher than that stimulated by ΔNcGRA7. The transcription levels of the cellular immune factors GBP1, GBP2, IRGa6, and IRGb6 were significantly higher after stimulation with ΔNcGRA7 parasites than after stimulation with Nc1. Furthermore, ΔNcGRA7 infection resulted in greater IRGa6 recruitment to the PVM than Nc1 infection. ΔNcGRA7 parasites were more easily cleared by macrophages than Nc1 parasites. Collectively, these results showed that NcGRA7 plays an important role in regulating the immune factors of mice and the aggregation of IRGa6 at the PVM, which affects the pathogenicity of N. caninum.
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Affiliation(s)
- Fei Wang
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Xianmei Wang
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Xingju Song
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Lei Ma
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Jing Yang
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Qun Liu
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China.,Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China
| | - Jing Liu
- National Animal Protozoa Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China. .,Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China.
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GBP5 Is an Interferon-Induced Inhibitor of Respiratory Syncytial Virus. J Virol 2020; 94:JVI.01407-20. [PMID: 32796072 DOI: 10.1128/jvi.01407-20] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 08/04/2020] [Indexed: 01/26/2023] Open
Abstract
Guanylate binding protein 5 (GBP5) belongs to the GTPase subfamily, which is mainly induced by interferon gamma (IFN-γ) and is involved in many important cellular processes, including inflammasome activation and innate immunity against a wide variety of microbial pathogens. However, it is unknown whether GBP5 inhibits respiratory syncytial virus (RSV) infection. In this study, we identified GBP5 as an effector of the anti-RSV activity of IFN-γ and found that in children, the weaker immune response, especially the weaker IFN-γ response and the decreased GBP5 expression, leads to RSV susceptibility. Furthermore, we revealed that GBP5 reduced the cell-associated levels of the RSV small hydrophobic (SH) protein, which was identified as a viroporin. In contrast, overexpression of the SH protein rescued RSV replication in the presence of GBP5. The GBP5-induced decrease in intracellular SH protein levels is because GBP5 promotes the release of the SH protein into the cell culture. Moreover, the GBP5 C583A mutants with changes at the C terminus or the GBP5 ΔC mutant lacking the C-terminal region, which impairs GBP5 localization in the Golgi, could not inhibit RSV infection, whereas the GTPase-defective GBP5 maintained RSV inhibition, suggesting that Golgi localization but not the GTPase activity of GBP5 is required for RSV inhibition. Interestingly, we found that RSV infection or RSV G protein downregulates GBP5 expression by upregulating DZIP3, an E3 ligase, which induces GBP5 degradation through the K48 ubiquitination and proteasomal pathways. Thus, this study reveals a complicated interplay between host restrictive factor GBP5 and RSV infection and provides important information for understanding the pathogenesis of RSV.IMPORTANCE RSV is a highly contagious virus that causes multiple infections in infants within their first year of life. It can also easily cause infection in elderly or immunocompromised individuals, suggesting that individual differences in immunity play an important role in RSV infection. Therefore, exploring the pathogenic mechanisms of RSV and identifying essential genes which inhibit RSV infection are necessary to develop an effective strategy to control RSV infection. Here, we report that the IFN-inducible gene GBP5 potently inhibits RSV replication by reducing the cell-associated levels of the RSV small hydrophobic (SH) protein, which is a viroporin. In contrast, the RSV G protein was shown to upregulate the expression of the DZIP3 protein, an E3 ligase that degrades GBP5 through the proteasomal pathway. Our study provides important information for the understanding of the pathogenic mechanisms of RSV and host immunity as well as the complicated interplay between the virus and host.
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Fisch D, Clough B, Domart MC, Encheva V, Bando H, Snijders AP, Collinson LM, Yamamoto M, Shenoy AR, Frickel EM. Human GBP1 Differentially Targets Salmonella and Toxoplasma to License Recognition of Microbial Ligands and Caspase-Mediated Death. Cell Rep 2020; 32:108008. [PMID: 32783936 PMCID: PMC7435695 DOI: 10.1016/j.celrep.2020.108008] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/19/2020] [Accepted: 07/15/2020] [Indexed: 12/12/2022] Open
Abstract
Interferon-inducible guanylate-binding proteins (GBPs) promote cell-intrinsic defense through host cell death. GBPs target pathogens and pathogen-containing vacuoles and promote membrane disruption for release of microbial molecules that activate inflammasomes. GBP1 mediates pyroptosis or atypical apoptosis of Salmonella Typhimurium (STm)- or Toxoplasma gondii (Tg)- infected human macrophages, respectively. The pathogen-proximal detection-mechanisms of GBP1 remain poorly understood, as humans lack functional immunity-related GTPases (IRGs) that assist murine Gbps. Here, we establish that GBP1 promotes the lysis of Tg-containing vacuoles and parasite plasma membranes, releasing Tg-DNA. In contrast, we show GBP1 targets cytosolic STm and recruits caspase-4 to the bacterial surface for its activation by lipopolysaccharide (LPS), but does not contribute to bacterial vacuole escape. Caspase-1 cleaves and inactivates GBP1, and a cleavage-deficient GBP1D192E mutant increases caspase-4-driven pyroptosis due to the absence of feedback inhibition. Our studies elucidate microbe-specific roles of GBP1 in infection detection and its triggering of the assembly of divergent caspase signaling platforms.
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Affiliation(s)
- Daniel Fisch
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK; MRC Centre for Molecular Bacteriology & Infection, Department of Infectious Disease, Imperial College London, London SW7 2AZ, UK
| | - Barbara Clough
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK
| | - Marie-Charlotte Domart
- Electron Microscopy Science Technology Platform, The Francis Crick Institute, London NW1 1AT, UK
| | - Vesela Encheva
- Mass Spectrometry and Proteomics Platform, The Francis Crick Institute, London NW1 1AT, UK
| | - Hironori Bando
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan; Laboratory of Immunoparasitology, WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
| | - Ambrosius P Snijders
- Mass Spectrometry and Proteomics Platform, The Francis Crick Institute, London NW1 1AT, UK
| | - Lucy M Collinson
- Electron Microscopy Science Technology Platform, The Francis Crick Institute, London NW1 1AT, UK
| | - Masahiro Yamamoto
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan; Laboratory of Immunoparasitology, WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan
| | - Avinash R Shenoy
- MRC Centre for Molecular Bacteriology & Infection, Department of Infectious Disease, Imperial College London, London SW7 2AZ, UK; The Francis Crick Institute, London NW1 1AT, UK.
| | - Eva-Maria Frickel
- Host-Toxoplasma Interaction Laboratory, The Francis Crick Institute, London NW1 1AT, UK; Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK.
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Transcriptome Analysis of Testes and Uterus: Reproductive Dysfunction Induced by Toxoplasma gondii in Mice. Microorganisms 2020; 8:microorganisms8081136. [PMID: 32731337 PMCID: PMC7464677 DOI: 10.3390/microorganisms8081136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 07/03/2020] [Accepted: 07/20/2020] [Indexed: 11/17/2022] Open
Abstract
Toxoplasma gondii (T. gondii) infection in female mammals during pregnancy can result in poor pregnancy. Similarly, it can result in male reproductive disorders in male mammals. Although the testes and uterus have very different biological makeup, they are still both attacked by T. gondii resulting in reproductive dysfunctions. We hypothesized that there are significant common genes in the testes and uterus that interact with T. gondii. Finding out and studying these genes is vital to understand the infection mechanism of T. gondii and the induced disease pathogenesis. To achieve this goal, we built a mice model of acute infection with T. gondii and the testes and uterus of the mice were sequenced by RNA-Seq. A total of 291 and 679 significantly differently expressed genes (DEGs) were obtained from the testes and the uterus, respectively. In the Gene Ontology (GO) analysis, part of the DEGs in the testes and uterus were related to 35 GO functions. When compared with the KEGG database, seven pathways affecting both the testes and uterus during the course of T. gondii infection were identified. In addition, Toxoplasmosis can significantly affect the expression of Nlrp5 and Insc leading to negative outcomes in the host. On the other hand, the host regulates Gbp7, Gbp2b, and Ifit3 to defend against T. gondii infection.
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Haldar AK, Nigam U, Yamamoto M, Coers J, Goyal N. Guanylate Binding Proteins Restrict Leishmania donovani Growth in Nonphagocytic Cells Independent of Parasitophorous Vacuolar Targeting. mBio 2020; 11:e01464-20. [PMID: 32723921 PMCID: PMC7387799 DOI: 10.1128/mbio.01464-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 02/05/2023] Open
Abstract
Interferon (IFN)-inducible guanylate binding proteins (GBPs) play important roles in host defense against many intracellular pathogens that reside within pathogen-containing vacuoles (PVs). For instance, members of the GBP family translocate to PVs occupied by the protozoan pathogen Toxoplasma and facilitate PV disruption and lytic parasite killing. While the GBP defense program targeting Toxoplasma has been studied in some detail, the role of GBPs in host defense to other protozoan pathogens is poorly characterized. Here, we report a critical role for both mouse and human GBPs in the cell-autonomous immune response against the vector-borne parasite Leishmania donovani Although L. donovani can infect both phagocytic and nonphagocytic cells, it predominantly replicates inside professional phagocytes. The underlying basis for this cell type tropism is unclear. Here, we demonstrate that GBPs restrict growth of L. donovani in both mouse and human nonphagocytic cells. GBP-mediated restriction of L. donovani replication occurs via a noncanonical pathway that operates independent of detectable translocation of GBPs to L. donovan-containing vacuoles (LCVs). Instead of promoting the lytic destruction of PVs, as reported for GBP-mediated killing of Toxoplasma in phagocytic cells, GBPs facilitate the delivery of L. donovani into autolysosomal-marker-positive compartments in mouse embryonic fibroblasts as well as the human epithelial cell line A549. Together our results show that GBPs control a novel cell-autonomous host defense program, which renders nonphagocytic cells nonpermissible for efficient Leishmania replication.IMPORTANCE The obligate intracellular parasite Leishmania causes the disease leishmaniasis, which is transmitted to mammalian hosts, including humans, via the sandfly vector. Following the bite-induced breach of the skin barrier, Leishmania is known to live and replicate predominantly inside professional phagocytes. Although Leishmania is also able to infect nonphagocytic cells, nonphagocytic cells support limited parasitic replication for unknown reasons. In this study, we show that nonphagocytic cells possess an intrinsic property to restrict Leishmania growth. Our study defines a novel role for a family of host defense proteins, the guanylate binding proteins (GBPs), in antileishmanial immunity. Mechanistically, our data indicate that GBPs facilitate the delivery of Leishmania into antimicrobial autolysosomes, thereby enhancing parasite clearance in nonphagocytic cells. We propose that this GBP-dependent host defense program makes nonphagocytic cells an inhospitable host cell type for Leishmania growth.
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Affiliation(s)
- Arun Kumar Haldar
- Division of Biochemistry, Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
| | - Utsav Nigam
- Division of Biochemistry, Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
| | - Masahiro Yamamoto
- Department of Immunoparasitology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Jörn Coers
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Neena Goyal
- Division of Biochemistry, Central Drug Research Institute, Council of Scientific and Industrial Research, Lucknow, India
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Biochemical and structural characterization of murine GBP7, a guanylate binding protein with an elongated C-terminal tail. Biochem J 2020; 476:3161-3182. [PMID: 31689351 DOI: 10.1042/bcj20190364] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 10/08/2019] [Accepted: 10/09/2019] [Indexed: 12/23/2022]
Abstract
Guanylate-binding proteins (GBPs) constitute a family of interferon-inducible guanosine triphosphatases (GTPases) that are key players in host defense against intracellular pathogens ranging from protozoa to bacteria and viruses. So far, human GBP1 and GBP5 as well as murine GBP2 (mGBP2) have been biochemically characterized in detail. Here, with murine GBP7 (mGBP7), a GBP family member with an unconventional and elongated C-terminus is analyzed. The present study demonstrates that mGBP7 exhibits a concentration-dependent GTPase activity and an apparent GTP turnover number of 20 min-1. In addition, fluorescence spectroscopy analyses reveal that mGBP7 binds GTP with high affinity (KD = 0.22 µM) and GTPase activity assays indicate that mGBP7 hydrolyzes GTP to GDP and GMP. The mGBP7 GTPase activity is inhibited by incubation with γ-phosphate analogs and a K51A mutation interfering with GTP binding. SEC-MALS analyses give evidence that mGBP7 forms transient dimers and that this oligomerization pattern is not influenced by the presence of nucleotides. Moreover, a structural model for mGBP7 is provided by homology modeling, which shows that the GTPase possesses an elongated C-terminal (CT) tail compared with the CaaX motif-containing mGBP2 and human GBP1. Molecular dynamics simulations indicate that this tail has transmembrane characteristics and, interestingly, confocal microscopy analyses reveal that the CT tail is required for recruitment of mGBP7 to the parasitophorous vacuole of Toxoplasma gondii.
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Kutsch M, Sistemich L, Lesser CF, Goldberg MB, Herrmann C, Coers J. Direct binding of polymeric GBP1 to LPS disrupts bacterial cell envelope functions. EMBO J 2020; 39:e104926. [PMID: 32510692 PMCID: PMC7327485 DOI: 10.15252/embj.2020104926] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/27/2020] [Accepted: 04/29/2020] [Indexed: 12/13/2022] Open
Abstract
In the outer membrane of gram‐negative bacteria, O‐antigen segments of lipopolysaccharide (LPS) form a chemomechanical barrier, whereas lipid A moieties anchor LPS molecules. Upon infection, human guanylate binding protein‐1 (hGBP1) colocalizes with intracellular gram‐negative bacterial pathogens, facilitates bacterial killing, promotes activation of the lipid A sensor caspase‐4, and blocks actin‐driven dissemination of the enteric pathogen Shigella. The underlying molecular mechanism for hGBP1's diverse antimicrobial functions is unknown. Here, we demonstrate that hGBP1 binds directly to LPS and induces “detergent‐like” LPS clustering through protein polymerization. Binding of polymerizing hGBP1 to the bacterial surface disrupts the O‐antigen barrier, thereby unmasking lipid A, eliciting caspase‐4 recruitment, enhancing antibacterial activity of polymyxin B, and blocking the function of the Shigella outer membrane actin motility factor IcsA. These findings characterize hGBP1 as an LPS‐binding surfactant that destabilizes the rigidity of the outer membrane to exert pleiotropic effects on the functionality of gram‐negative bacterial cell envelopes.
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Affiliation(s)
- Miriam Kutsch
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, USA
| | - Linda Sistemich
- Department of Physical Chemistry I, Ruhr-University Bochum, Bochum, Germany
| | - Cammie F Lesser
- Division of Infectious Diseases, Center for Bacterial Pathogenesis, Massachusetts General Hospital, Boston, MA, USA.,Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Marcia B Goldberg
- Division of Infectious Diseases, Center for Bacterial Pathogenesis, Massachusetts General Hospital, Boston, MA, USA.,Department of Microbiology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Christian Herrmann
- Department of Physical Chemistry I, Ruhr-University Bochum, Bochum, Germany
| | - Jörn Coers
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, USA.,Department of Immunology, Duke University Medical Center, Durham, NC, USA
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44
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Ince S, Zhang P, Kutsch M, Krenczyk O, Shydlovskyi S, Herrmann C. Catalytic activity of human guanylate-binding protein 1 coupled to the release of structural restraints imposed by the C-terminal domain. FEBS J 2020; 288:582-599. [PMID: 32352209 DOI: 10.1111/febs.15348] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/10/2020] [Accepted: 04/27/2020] [Indexed: 12/21/2022]
Abstract
Human guanylate-binding protein 1 (hGBP-1) shows a dimer-induced acceleration of the GTPase activity yielding GDP as well as GMP. While the head-to-head dimerization of the large GTPase (LG) domain is well understood, the role of the rest of the protein, particularly of the GTPase effector domain (GED), in dimerization and GTP hydrolysis is still obscure. In this study, with truncations and point mutations on hGBP-1 and by means of biochemical and biophysical methods, we demonstrate that the intramolecular communication between the LG domain and the GED (LG:GED) is crucial for protein dimerization and dimer-stimulated GTP hydrolysis. In the course of GTP binding and γ-phosphate cleavage, conformational changes within hGBP-1 are controlled by a chain of amino acids ranging from the region near the nucleotide-binding pocket to the distant LG:GED interface and lead to the release of the GED from the LG domain. This opening of the structure allows the protein to form GED:GED contacts within the dimer, in addition to the established LG:LG interface. After releasing the cleaved γ-phosphate, the dimer either dissociates yielding GDP as the final product or it stays dimeric to further cleave the β-phosphate yielding GMP. The second phosphate cleavage step, that is, the formation of GMP, is even more strongly coupled to structural changes and thus more sensitive to structural restraints imposed by the GED. Altogether, we depict a comprehensive mechanism of GTP hydrolysis catalyzed by hGBP-1, which provides a detailed molecular understanding of the enzymatic activity connected to large structural rearrangements of the protein. DATABASE: Structural data are available in RCSB Protein Data Bank under the accession numbers: 1F5N, 1DG3, 2B92.
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Affiliation(s)
- Semra Ince
- Physical Chemistry I, Ruhr-University, Bochum, Germany
| | - Ping Zhang
- Physical Chemistry I, Ruhr-University, Bochum, Germany
| | - Miriam Kutsch
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, USA
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Kohler KM, Kutsch M, Piro AS, Wallace GD, Coers J, Barber MF. A Rapidly Evolving Polybasic Motif Modulates Bacterial Detection by Guanylate Binding Proteins. mBio 2020; 11:e00340-20. [PMID: 32430466 PMCID: PMC7240152 DOI: 10.1128/mbio.00340-20] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 04/16/2020] [Indexed: 12/13/2022] Open
Abstract
Cell-autonomous immunity relies on the rapid detection of invasive pathogens by host proteins. Guanylate binding proteins (GBPs) have emerged as key mediators of vertebrate immune defense through their ability to recognize a diverse array of intracellular pathogens and pathogen-containing cellular compartments. Human and mouse GBPs have been shown to target distinct groups of microbes, although the molecular determinants of pathogen specificity remain unclear. We show that rapid diversification of a C-terminal polybasic motif (PBM) in primate GBPs controls recognition of the model cytosolic bacterial pathogen Shigella flexneri By swapping this membrane-binding motif between primate GBP orthologs, we found that the ability to target S. flexneri has been enhanced and lost in specific lineages of New World primates. Single substitutions in rapidly evolving sites of the GBP1 PBM are sufficient to abolish or restore bacterial detection abilities, illustrating a role for epistasis in the evolution of pathogen recognition. We further demonstrate that the squirrel monkey GBP2 C-terminal domain recently gained the ability to target S. flexneri through a stepwise process of convergent evolution. These findings reveal a mechanism by which accelerated evolution of a PBM shifts GBP target specificity and aid in resolving the molecular basis of GBP function in cell-autonomous immune defense.IMPORTANCE Many infectious diseases are caused by microbes that enter and survive within host cells. Guanylate binding proteins (GBPs) are a group of immune proteins which recognize and inhibit a variety of intracellular pathogenic microbes. We discovered that a short sequence within GBPs required for the detection of bacteria, the polybasic motif (PBM), has been rapidly evolving between primate species. By swapping PBMs between primate GBP1 genes, we were able to show that specific sequences can both reduce and improve the ability of GBP1 to target intracellular bacteria. We also show that the ability to envelop bacteria has independently evolved in GBP2 of South American monkeys. Taking the results together, this report illustrates how primate GBPs have adapted to defend against infectious pathogens.
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Affiliation(s)
- Kristin M Kohler
- Institute of Ecology & Evolution, University of Oregon, Eugene, Oregon, USA
| | - Miriam Kutsch
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Anthony S Piro
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Graham D Wallace
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Jörn Coers
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Matthew F Barber
- Institute of Ecology & Evolution, University of Oregon, Eugene, Oregon, USA
- Department of Biology, University of Oregon, Eugene, Oregon, USA
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Tao Y, Yang Y, Zhou R, Gong T. Golgi Apparatus: An Emerging Platform for Innate Immunity. Trends Cell Biol 2020; 30:467-477. [PMID: 32413316 DOI: 10.1016/j.tcb.2020.02.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/24/2020] [Accepted: 02/24/2020] [Indexed: 12/23/2022]
Abstract
The Golgi apparatus serves as a receiving station where proteins from the endoplasmic reticulum (ER) are further processed before being sent to other cellular compartments. In addition to its well-appreciated roles in vesicular trafficking and protein/lipid secretion, recent studies have demonstrated that the Golgi acts as a signaling platform to facilitate multiple innate immune pathways. Moreover, the membranous networks that connect the Golgi with the ER, mitochondria, endosomes, and autophagosomes provide convenient access to innate immune signal transduction and subsequent effector responses. Here, we review the emerging knowledge about the roles of the Golgi in the initiation and activation of innate immune signaling. Moreover, microbial hijacking strategies that inhibit Golgi-associated innate immune responses will also be discussed.
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Affiliation(s)
- Ye Tao
- Department of Otolaryngology-Head and Neck Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China; Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Science, Division of Life Science and Medicine, University of Science and Technology of China, Hefei 230027, China
| | - Yanqing Yang
- Department of Clinical Laboratory, the First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
| | - Rongbin Zhou
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Science, Division of Life Science and Medicine, University of Science and Technology of China, Hefei 230027, China.
| | - Tao Gong
- Hefei National Laboratory for Physical Sciences at Microscale, the CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Basic Medical Science, Division of Life Science and Medicine, University of Science and Technology of China, Hefei 230027, China.
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47
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Sistemich L, Kutsch M, Hämisch B, Zhang P, Shydlovskyi S, Britzen-Laurent N, Stürzl M, Huber K, Herrmann C. The Molecular Mechanism of Polymer Formation of Farnesylated Human Guanylate-binding Protein 1. J Mol Biol 2020; 432:2164-2185. [PMID: 32087202 DOI: 10.1016/j.jmb.2020.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/30/2020] [Accepted: 02/09/2020] [Indexed: 02/07/2023]
Abstract
The human guanylate-binding protein 1 (hGBP1) belongs to the dynamin superfamily proteins and represents a key player in the innate immune response. Farnesylation at the C-terminus is required for hGBP1's activity against microbial pathogens, as well as for its antiproliferative and antitumor activity. The farnesylated hGBP1 (hGBP1fn) retains many characteristics of the extensively studied nonfarnesylated protein and gains additional abilities like binding to lipid membranes and formation of hGBP1fn polymers. These polymers are believed to serve as a protein depot, making the enzyme immediately available to fight the invasion of intracellular pathogens. Here we study the molecular mechanism of hGBP1 polymer formation as it is a crucial state of this enzyme, allowing for a rapid response demanded by the biological function. We employ Förster resonance energy transfer in order to trace intra and intermolecular distance changes of protein domains. Light scattering techniques yield deep insights into the changes in size and shape. The GTP hydrolysis driven cycling between a closed, farnesyl moiety hidden state and an opened, farnesyl moiety exposed state represents the first phase, preparing the molecule for polymerization. Within the second phase of polymer growth, opened hGBP1 molecules can be incorporated in the growing polymer where the opened structure is stabilized, similar to a surfactant molecule in a micelle, pointing the farnesyl moieties into the hydrophobic center and positioning the head groups at the periphery of the polymer. We contribute the molecular mechanism of polymer formation, paving the ground for a detailed understanding of hGBP1 function.
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Affiliation(s)
- Linda Sistemich
- Physical Chemistry I, Ruhr-University Bochum, 44780, Bochum, Germany
| | - Miriam Kutsch
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC27710, USA
| | - Benjamin Hämisch
- Chemistry Department, University of Paderborn, 33098, Paderborn, Germany
| | - Ping Zhang
- Physical Chemistry I, Ruhr-University Bochum, 44780, Bochum, Germany
| | | | - Nathalie Britzen-Laurent
- Division of Molecular and Experimental Surgery, Translational Research Center, Department of Surgery, University Medical Center Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Michael Stürzl
- Division of Molecular and Experimental Surgery, Translational Research Center, Department of Surgery, University Medical Center Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - Klaus Huber
- Chemistry Department, University of Paderborn, 33098, Paderborn, Germany
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48
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Carbotti G, Petretto A, Naschberger E, Stürzl M, Martini S, Mingari MC, Filaci G, Ferrini S, Fabbi M. Cytokine-Induced Guanylate Binding Protein 1 (GBP1) Release from Human Ovarian Cancer Cells. Cancers (Basel) 2020; 12:E488. [PMID: 32093058 PMCID: PMC7072386 DOI: 10.3390/cancers12020488] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/08/2020] [Accepted: 02/17/2020] [Indexed: 01/01/2023] Open
Abstract
We showed that IL-27 shares several effects with IFN-γ in human cancer cells. To identify novel extracellular mediators, potentially involved in epithelial ovarian cancer (EOC) biology, we analyzed the effect of IL-27 or IFN-γ on the secretome of cultured EOC cells by mass-spectrometry (nano-UHPLC-MS/MS). IL-27 and IFN-γ modulate the release of a limited fraction of proteins among those induced in the whole cell. We focused our attention on GBP1, a guanylate-binding protein and GTPase, which mediates several biological activities of IFNs. Cytokine treatment induced GBP1, 2, and 5 expressions in EOC cells, but only GBP1 was secreted. ELISA and immunoblotting showed that cytokine-stimulated EOC cells release full-length GBP1 in vitro, through non-classical pathways, not involving microvesicles. Importantly, full-length GBP1 accumulates in the ascites of most EOC patients and ex-vivo EOC cells show constitutive tyrosine-phosphorylated STAT1/3 proteins and GBP1 expression, supporting a role for Signal Transducer And Activator Of Transcription (STAT)-activating cytokines in vivo. High GBP1 gene expression correlates with better overall survival in the TCGA (The Cancer Genome Atlas) dataset of EOC. In addition, GBP1 transfection partially reduced EOC cell viability in an MTT assay. Our data show for the first time that cytokine-stimulated tumor cells release soluble GBP1 in vitro and in vivo and suggest that GBP1 may have anti-tumor effects in EOC.
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Affiliation(s)
- Grazia Carbotti
- IRCCS Ospedale Policlinico San Martino, Biotherapies Unit, Largo R. Benzi 10, 16132 Genoa, Italy; (G.C.); (G.F.)
| | - Andrea Petretto
- Core Facilities—Clinical Proteomics and Metabolomics, IRCCS Istituto Giannina Gaslini, Via Gerolamo Gaslini 5, 16147 Genoa, Italy;
| | - Elisabeth Naschberger
- Division of Molecular and Experimental Surgery, University Medical Center Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Schwabachanlage 12, 91054 Erlangen, Germany; (E.N.); (M.S.)
| | - Michael Stürzl
- Division of Molecular and Experimental Surgery, University Medical Center Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg, Schwabachanlage 12, 91054 Erlangen, Germany; (E.N.); (M.S.)
| | - Stefania Martini
- IRCCS Ospedale Policlinico San Martino, Immunology Unit, Largo R. Benzi 10, 16132 Genoa, Italy; (S.M.); (M.C.M.)
| | - Maria Cristina Mingari
- IRCCS Ospedale Policlinico San Martino, Immunology Unit, Largo R. Benzi 10, 16132 Genoa, Italy; (S.M.); (M.C.M.)
- Department of Experimental Medicine and Centre of Excellence for Biomedical Research, University of Genoa, Via L.B. Alberti 2, 16132 Genoa, Italy
| | - Gilberto Filaci
- IRCCS Ospedale Policlinico San Martino, Biotherapies Unit, Largo R. Benzi 10, 16132 Genoa, Italy; (G.C.); (G.F.)
- Centre of Excellence for Biomedical Research and Department of Internal Medicine, University of Genoa, Via De Toni 14, 16132 Genoa, Italy
| | - Silvano Ferrini
- IRCCS Ospedale Policlinico San Martino, Biotherapies Unit, Largo R. Benzi 10, 16132 Genoa, Italy; (G.C.); (G.F.)
| | - Marina Fabbi
- IRCCS Ospedale Policlinico San Martino, Biotherapies Unit, Largo R. Benzi 10, 16132 Genoa, Italy; (G.C.); (G.F.)
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49
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The alpha helix of the intermediate region in hGBP-1 acts as a coupler for enhanced GMP formation. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2020; 1868:140364. [PMID: 31954926 DOI: 10.1016/j.bbapap.2020.140364] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 12/15/2019] [Accepted: 01/11/2020] [Indexed: 01/31/2023]
Abstract
The interferon-gamma inducible large GTPase human guanylate binding protein-1 (hGBP-1) plays a key role in anti-pathogenic and anti-proliferative functions. This protein hydrolyzes GTP to both GDP and GMP (predominant product) through sequential phosphate cleavages, which makes it functionally distinct from other GTPases. Previous study on truncated variants of hGBP-1 suggested that the α-helix present in the intermediate region is essential for dimerization and thus for GMP formation. However, the role of this helix in the full-length protein in GMP formation is not clearly understood. Here, we present that substitution of the helix with a Gly-rich flexible (GGS)3 sequence in the full-length hGBP-1 (termed as linker protein) showed a drastic decrease in GMP formation. Unlike wild-type, the linker protein is not capable of undergoing substrate-induced dimerization and thereby transition state-induced tetramerization, suggesting the importance of the helix in oligomerization. Furthermore, we examined the effect of interactions between this helix and the α2-helix of the globular domain in GMP formation through mutational studies. The L118G mutation in the α2-helix showed a significantly reduced GMP formation. These results indicate that the interactions of the α-helix with the α2-helix are essential for enhanced GMP production. We propose that these interactions help in the oligomerization-assisted proper positioning of the catalytic machinery for efficient second phosphate cleavage. These findings thus provide a better understanding into the regulation of GMP formation in a large GTPase hGBP-1.
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50
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Lorenz C, Ince S, Zhang T, Cousin A, Batra-Safferling R, Nagel-Steger L, Herrmann C, Stadler AM. Farnesylation of human guanylate-binding protein 1 as safety mechanism preventing structural rearrangements and uninduced dimerization. FEBS J 2019; 287:496-514. [PMID: 31330084 DOI: 10.1111/febs.15015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 06/25/2019] [Accepted: 07/19/2019] [Indexed: 01/03/2023]
Abstract
Human guanylate-binding protein 1 (hGBP1) belongs to the family of dynamin-like proteins and is activated by addition of nucleotides, leading to protein oligomerization and stimulated GTPase activity. In vivo, hGBP1 is post-translationally modified by attachment of a farnesyl group yielding farn-hGBP1. In this study, hydrodynamic differences in farn-hGBP1 and unmodified hGBP1 were investigated using dynamic light scattering (DLS), analytical ultracentrifugation (AUC) and analytical size-exclusion chromatography (SEC). In addition, we performed small-angle X-ray scattering (SAXS) experiments coupled with a SEC setup (SEC-SAXS) to investigate structural properties of nonmodified hGBP1 and farn-hGBP1 in solution. SEC-SAXS measurements revealed that farnesylation keeps hGBP1 in its inactive monomeric and crystal-like conformation in nucleotide-free solution, whereas unmodified hGBP1 forms a monomer-dimer equilibrium both in the inactive ground state in nucleotide-free solution as well as in the activated state that is trapped by addition of the nonhydrolysable GTP analogue GppNHp. Nonmodified hGBP1 is structurally perturbed as compared to farn-hGBP. In particular, GppNHp binding leads to large structural rearrangements and higher conformational flexibility of the monomer and the dimer. Structural changes observed in the nonmodified protein are prerequisites for further oligomer assemblies of farn-hGBP1 that occur in the presence of nucleotides. DATABASE: All SEC-SAXS data, corresponding fits to the data and structural models are deposited in the Small Angle Scattering Biological Data Bank [SASBDB (Nucleic Acids Res, 43, 2015, D357)] with project IDs: SASDEE8, SASDEF8, SASDEG8, SASDEH8, SASDEJ8, SASDEK8, SASDEL8 and SASDEM8.
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Affiliation(s)
- Charlotte Lorenz
- Jülich Centre for Neutron Science (JCNS-1) and Institute for Complex Systems (ICS-1), Forschungszentrum Jülich GmbH, Germany.,Institute of Physical Chemistry, RWTH Aachen University, Germany
| | - Semra Ince
- Physical Chemistry I, Faculty of Chemistry and Biochemistry, Ruhr-University, Bochum, Germany
| | - Tao Zhang
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, Germany
| | - Anneliese Cousin
- Institute of Complex Systems (ICS-6), Structural Biochemistry, Forschungszentrum Jülich GmbH, Germany
| | - Renu Batra-Safferling
- Institute of Complex Systems (ICS-6), Structural Biochemistry, Forschungszentrum Jülich GmbH, Germany
| | | | - Christian Herrmann
- Physical Chemistry I, Faculty of Chemistry and Biochemistry, Ruhr-University, Bochum, Germany
| | - Andreas M Stadler
- Jülich Centre for Neutron Science (JCNS-1) and Institute for Complex Systems (ICS-1), Forschungszentrum Jülich GmbH, Germany.,Institute of Physical Chemistry, RWTH Aachen University, Germany
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