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Jia M, Sun M, Tang YD, Zhang YY, Wang H, Cai X, Meng F. Senecavirus A Entry Into Host Cells Is Dependent on the Cholesterol-Mediated Endocytic Pathway. Front Vet Sci 2022; 9:840655. [PMID: 35498725 PMCID: PMC9040607 DOI: 10.3389/fvets.2022.840655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 02/25/2022] [Indexed: 11/13/2022] Open
Abstract
Senecavirus A (SVA), an important member of the Picornaviridae family, causes vesicular disease in pigs. Here, we generated an EGFP-expressing recombinant SVA re-SVA-EGFP, which exhibited similar growth kinetics to its parental virus. The reporter SVA was used to study the role of pig ANTXR1 (pANTXR1) in SVA infection in a porcine alveolar macrophage cell line (PAM-Tang cells). Knockdown of the pANTXR1 significantly reduced SVA infection and replication in PAM-Tang cells, while re-expression of the pANTXR1 promoted the cell susceptibility to SVA infection. The results indicated that pANTXR1 is a crucial receptor mediating SVA infection. Subsequently, the viral endocytosis pathways for SVA entry into pig cells were investigated and the results showed that cholesterol played an essential role in receptor-mediated SVA entry. Together, these results demonstrated that SVA entered into host cells through the pANTXR1-mediated cholesterol pathway. Our findings provide potential targets to develop antiviral drugs for the prevention of SVA infection in the pig population.
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Affiliation(s)
- Meiyu Jia
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Mingxia Sun
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yan-Dong Tang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Yu-Yuan Zhang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Haiwei Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
| | - Xuehui Cai
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- Heilongjiang Provincial Key Laboratory of Veterinary Immunology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- *Correspondence: Xuehui Cai
| | - Fandan Meng
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin, China
- Fandan Meng
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2
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Whitley P, Grau B, Gumbart JC, Martínez-Gil L, Mingarro I. Folding and Insertion of Transmembrane Helices at the ER. Int J Mol Sci 2021; 22:ijms222312778. [PMID: 34884581 PMCID: PMC8657811 DOI: 10.3390/ijms222312778] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 01/16/2023] Open
Abstract
In eukaryotic cells, the endoplasmic reticulum (ER) is the entry point for newly synthesized proteins that are subsequently distributed to organelles of the endomembrane system. Some of these proteins are completely translocated into the lumen of the ER while others integrate stretches of amino acids into the greasy 30 Å wide interior of the ER membrane bilayer. It is generally accepted that to exist in this non-aqueous environment the majority of membrane integrated amino acids are primarily non-polar/hydrophobic and adopt an α-helical conformation. These stretches are typically around 20 amino acids long and are known as transmembrane (TM) helices. In this review, we will consider how transmembrane helices achieve membrane integration. We will address questions such as: Where do the stretches of amino acids fold into a helical conformation? What is/are the route/routes that these stretches take from synthesis at the ribosome to integration through the ER translocon? How do these stretches ‘know’ to integrate and in which orientation? How do marginally hydrophobic stretches of amino acids integrate and survive as transmembrane helices?
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Affiliation(s)
- Paul Whitley
- Department of Biology and Biochemistry, Centre for Regenerative Medicine, University of Bath, Bath BA2 7AY, UK;
| | - Brayan Grau
- Department of Biochemistry and Molecular Biology, Institute of Biotechnology and Biomedicine (BIOTECMED), Universitat de València, E-46100 Burjassot, Spain; (B.G.); (L.M.-G.)
| | - James C. Gumbart
- School of Physics, School of Chemistry and Biochemistry, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA;
| | - Luis Martínez-Gil
- Department of Biochemistry and Molecular Biology, Institute of Biotechnology and Biomedicine (BIOTECMED), Universitat de València, E-46100 Burjassot, Spain; (B.G.); (L.M.-G.)
| | - Ismael Mingarro
- Department of Biochemistry and Molecular Biology, Institute of Biotechnology and Biomedicine (BIOTECMED), Universitat de València, E-46100 Burjassot, Spain; (B.G.); (L.M.-G.)
- Correspondence: ; Tel.: +34-963543796
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3
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Bañó-Polo M, Martínez-Gil L, Barrera FN, Mingarro I. Insertion of Bacteriorhodopsin Helix C Variants into Biological Membranes. ACS OMEGA 2020; 5:556-560. [PMID: 31956802 PMCID: PMC6964287 DOI: 10.1021/acsomega.9b03126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/04/2019] [Indexed: 06/10/2023]
Abstract
A peptide corresponding to bacteriorhodopsin (bR) helix C, later named pHLIP, inserts across lipid bilayers as a monomeric α-helix at acidic pH, but is an unstructured surface-bound monomer at neutral pH. As a result of such pH-responsiveness, pHLIP targets acidic tumors and has been used as a vehicle for imaging and drug-delivery cargoes. To gain insights about the insertion of bR helix C into biological membranes, we replaced two key aspartic residues that control the topological transition from the aqueous phase into a lipid bilayer. Here, we used an in vitro transcription-translation system to study the translocon-mediated insertion of helix C-derived segments into rough microsomes. Our data provide the first quantitative biological understanding of this effect. Interestingly, replacing the aspartic residues by glutamic residues does not significantly alters the insertion propensity, while replacement by alanines promotes a transmembrane orientation. These results are consistent with mutational data obtained in synthetic liposomes by manipulating pH conditions. Our findings support the notion that the translocon facilitates topogenesis under physiological pH conditions.
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Affiliation(s)
- Manuel Bañó-Polo
- Departament
de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar
en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València. E-46100 Burjassot, Spain
| | - Luis Martínez-Gil
- Departament
de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar
en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València. E-46100 Burjassot, Spain
| | - Francisco N. Barrera
- Department
of Biochemistry & Cellular and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ismael Mingarro
- Departament
de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar
en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València. E-46100 Burjassot, Spain
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4
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Bañó-Polo M, Baeza-Delgado C, Tamborero S, Hazel A, Grau B, Nilsson I, Whitley P, Gumbart JC, von Heijne G, Mingarro I. Transmembrane but not soluble helices fold inside the ribosome tunnel. Nat Commun 2018; 9:5246. [PMID: 30531789 PMCID: PMC6286305 DOI: 10.1038/s41467-018-07554-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 11/09/2018] [Indexed: 12/15/2022] Open
Abstract
Integral membrane proteins are assembled into the ER membrane via a continuous ribosome-translocon channel. The hydrophobicity and thickness of the core of the membrane bilayer leads to the expectation that transmembrane (TM) segments minimize the cost of harbouring polar polypeptide backbones by adopting a regular pattern of hydrogen bonds to form α-helices before integration. Co-translational folding of nascent chains into an α-helical conformation in the ribosomal tunnel has been demonstrated previously, but the features governing this folding are not well understood. In particular, little is known about what features influence the propensity to acquire α-helical structure in the ribosome. Using in vitro translation of truncated nascent chains trapped within the ribosome tunnel and molecular dynamics simulations, we show that folding in the ribosome is attained for TM helices but not for soluble helices, presumably facilitating SRP (signal recognition particle) recognition and/or a favourable conformation for membrane integration upon translocon entry.
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Affiliation(s)
- Manuel Bañó-Polo
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Departament de Bioquímica i Biologia Molecular, Universitat de València, E-46100, Burjassot, Spain
| | - Carlos Baeza-Delgado
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Departament de Bioquímica i Biologia Molecular, Universitat de València, E-46100, Burjassot, Spain
| | - Silvia Tamborero
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Departament de Bioquímica i Biologia Molecular, Universitat de València, E-46100, Burjassot, Spain
| | - Anthony Hazel
- School of Physics, School of Chemistry and Biochemistry, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Brayan Grau
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Departament de Bioquímica i Biologia Molecular, Universitat de València, E-46100, Burjassot, Spain
| | - IngMarie Nilsson
- Center for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, SE-10691, Stockholm, Sweden
| | - Paul Whitley
- Department of Biology and Biochemistry, Centre for Regenerative Medicine, University of Bath, Bath, BA2 7AY, UK
| | - James C Gumbart
- School of Physics, School of Chemistry and Biochemistry, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Gunnar von Heijne
- Center for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, SE-10691, Stockholm, Sweden
| | - Ismael Mingarro
- Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Departament de Bioquímica i Biologia Molecular, Universitat de València, E-46100, Burjassot, Spain.
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5
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Pastor-Cantizano N, García-Murria MJ, Bernat-Silvestre C, Marcote MJ, Mingarro I, Aniento F. N-Linked Glycosylation of the p24 Family Protein p24δ5 Modulates Retrograde Golgi-to-ER Transport of K/HDEL Ligands in Arabidopsis. MOLECULAR PLANT 2017; 10:1095-1106. [PMID: 28735024 DOI: 10.1016/j.molp.2017.07.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 07/04/2017] [Accepted: 07/12/2017] [Indexed: 05/04/2023]
Abstract
The K/HDEL receptor ERD2 mediates the transport of soluble endoplasmic reticulum (ER)-resident proteins containing a C-terminal K/HDEL signal from the Golgi apparatus back to the ER via COPI (COat Protein I)-coated vesicles. Sorting of ERD2 within COPI vesicles is facilitated by p24 proteins. In Arabidopsis, p24δ5 has been shown to interact directly with ERD2 via its luminal GOLD (GOLgi Dynamics) domain and with COPI proteins via its cytoplasmic C-terminal tail at the acidic pH of the Golgi apparatus. Several members of the p24 family in mammals and yeast have been shown to be glycosylated, but whether Arabidopsis p24 proteins are glycosylated and the role of the sugar moiety in p24 function remain unclear. Here, we show that Arabidopsis p24δ5 protein is N-glycosylated in its GOLD domain. Furthermore, we demonstrate that this post-translational modification is important for its coupled transport with p24β2 at the ER-Golgi interface, for its interaction with the K/HDEL receptor ERD2, and for retrograde transport of ERD2 and K/HDEL ligands from the Golgi apparatus back to the ER.
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Affiliation(s)
- Noelia Pastor-Cantizano
- Departamento de Bioquímica y Biología Molecular, Universitat de València, 46100 Burjassot, Spain; Estructura de Recerca Interdisciplinar en Biotecnología i Biomedicina (ERI BIOTECMED), Universitat de València, 46100 Burjassot, Spain
| | - María Jesús García-Murria
- Departamento de Bioquímica y Biología Molecular, Universitat de València, 46100 Burjassot, Spain; Estructura de Recerca Interdisciplinar en Biotecnología i Biomedicina (ERI BIOTECMED), Universitat de València, 46100 Burjassot, Spain
| | - Cesar Bernat-Silvestre
- Departamento de Bioquímica y Biología Molecular, Universitat de València, 46100 Burjassot, Spain; Estructura de Recerca Interdisciplinar en Biotecnología i Biomedicina (ERI BIOTECMED), Universitat de València, 46100 Burjassot, Spain
| | - María Jesús Marcote
- Departamento de Bioquímica y Biología Molecular, Universitat de València, 46100 Burjassot, Spain; Estructura de Recerca Interdisciplinar en Biotecnología i Biomedicina (ERI BIOTECMED), Universitat de València, 46100 Burjassot, Spain
| | - Ismael Mingarro
- Departamento de Bioquímica y Biología Molecular, Universitat de València, 46100 Burjassot, Spain; Estructura de Recerca Interdisciplinar en Biotecnología i Biomedicina (ERI BIOTECMED), Universitat de València, 46100 Burjassot, Spain
| | - Fernando Aniento
- Departamento de Bioquímica y Biología Molecular, Universitat de València, 46100 Burjassot, Spain; Estructura de Recerca Interdisciplinar en Biotecnología i Biomedicina (ERI BIOTECMED), Universitat de València, 46100 Burjassot, Spain.
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6
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Bañó-Polo M, Martínez-Garay CA, Grau B, Martínez-Gil L, Mingarro I. Membrane insertion and topology of the translocon-associated protein (TRAP) gamma subunit. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:903-909. [PMID: 28132902 DOI: 10.1016/j.bbamem.2017.01.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/19/2017] [Accepted: 01/25/2017] [Indexed: 12/20/2022]
Abstract
Translocon-associated protein (TRAP) complex is intimately associated with the ER translocon for the insertion or translocation of newly synthesised proteins in eukaryotic cells. The TRAP complex is comprised of three single-spanning and one multiple-spanning subunits. We have investigated the membrane insertion and topology of the multiple-spanning TRAP-γ subunit by glycosylation mapping and green fluorescent protein fusions both in vitro and in cell cultures. Results demonstrate that TRAP-γ has four transmembrane (TM) segments, an Nt/Ct cytosolic orientation and that the less hydrophobic TM segment inserts efficiently into the membrane only in the cellular context of full-length protein.
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Affiliation(s)
- Manuel Bañó-Polo
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València, E-46 100 Burjassot, Spain
| | - Carlos A Martínez-Garay
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València, E-46 100 Burjassot, Spain
| | - Brayan Grau
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València, E-46 100 Burjassot, Spain
| | - Luis Martínez-Gil
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València, E-46 100 Burjassot, Spain
| | - Ismael Mingarro
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologia i Biomedicina (ERI BioTecMed), Universitat de València, E-46 100 Burjassot, Spain.
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7
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Poms M, Ansorge P, Martinez-Gil L, Jurt S, Gottstein D, Fracchiolla KE, Cohen LS, Güntert P, Mingarro I, Naider F, Zerbe O. NMR Investigation of Structures of G-protein Coupled Receptor Folding Intermediates. J Biol Chem 2016; 291:27170-27186. [PMID: 27864365 DOI: 10.1074/jbc.m116.740985] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 11/03/2016] [Indexed: 11/06/2022] Open
Abstract
Folding of G-protein coupled receptors (GPCRs) according to the two-stage model (Popot, J. L., and Engelman, D. M. (1990) Biochemistry 29, 4031-4037) is postulated to proceed in 2 steps: partitioning of the polypeptide into the membrane followed by diffusion until native contacts are formed. Herein we investigate conformational preferences of fragments of the yeast Ste2p receptor using NMR. Constructs comprising the first, the first two, and the first three transmembrane (TM) segments, as well as a construct comprising TM1-TM2 covalently linked to TM7 were examined. We observed that the isolated TM1 does not form a stable helix nor does it integrate well into the micelle. TM1 is significantly stabilized upon interaction with TM2, forming a helical hairpin reported previously (Neumoin, A., Cohen, L. S., Arshava, B., Tantry, S., Becker, J. M., Zerbe, O., and Naider, F. (2009) Biophys. J. 96, 3187-3196), and in this case the protein integrates into the hydrophobic interior of the micelle. TM123 displays a strong tendency to oligomerize, but hydrogen exchange data reveal that the center of TM3 is solvent exposed. In all GPCRs so-far structurally characterized TM7 forms many contacts with TM1 and TM2. In our study TM127 integrates well into the hydrophobic environment, but TM7 does not stably pack against the remaining helices. Topology mapping in microsomal membranes also indicates that TM1 does not integrate in a membrane-spanning fashion, but that TM12, TM123, and TM127 adopt predominantly native-like topologies. The data from our study would be consistent with the retention of individual helices of incompletely synthesized GPCRs in the vicinity of the translocon until the complete receptor is released into the membrane interior.
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Affiliation(s)
- Martin Poms
- From the Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Philipp Ansorge
- From the Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Luis Martinez-Gil
- the Department of Biochemistry and Molecular Biology, ERI BioTecMed, University of Valencia, E-46100 Burjassot, Spain
| | - Simon Jurt
- From the Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Daniel Gottstein
- the Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, Max-von-Laue-Straße 9, 60438 Frankfurt am Main, Germany
| | - Katrina E Fracchiolla
- the Department of Chemistry, The College of Staten Island, City University of New York (CUNY), Staten Island, New York 10314, the Ph.D. Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, and
| | - Leah S Cohen
- the Department of Chemistry, The College of Staten Island, City University of New York (CUNY), Staten Island, New York 10314, the Ph.D. Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, and
| | - Peter Güntert
- the Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University Frankfurt, Max-von-Laue-Straße 9, 60438 Frankfurt am Main, Germany.,the Laboratory of Physical Chemistry, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Ismael Mingarro
- the Department of Biochemistry and Molecular Biology, ERI BioTecMed, University of Valencia, E-46100 Burjassot, Spain
| | - Fred Naider
- the Department of Chemistry, The College of Staten Island, City University of New York (CUNY), Staten Island, New York 10314, the Ph.D. Programs in Biochemistry and Chemistry, The Graduate Center of the City University of New York, New York, New York 10016, and
| | - Oliver Zerbe
- From the Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland,
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Martinez-Gil L, Mingarro I. Viroporins, Examples of the Two-Stage Membrane Protein Folding Model. Viruses 2015; 7:3462-82. [PMID: 26131957 PMCID: PMC4517110 DOI: 10.3390/v7072781] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 06/15/2015] [Accepted: 06/17/2015] [Indexed: 12/21/2022] Open
Abstract
Viroporins are small, α-helical, hydrophobic virus encoded proteins, engineered to form homo-oligomeric hydrophilic pores in the host membrane. Viroporins participate in multiple steps of the viral life cycle, from entry to budding. As any other membrane protein, viroporins have to find the way to bury their hydrophobic regions into the lipid bilayer. Once within the membrane, the hydrophobic helices of viroporins interact with each other to form higher ordered structures required to correctly perform their porating activities. This two-step process resembles the two-stage model proposed for membrane protein folding by Engelman and Poppot. In this review we use the membrane protein folding model as a leading thread to analyze the mechanism and forces behind the membrane insertion and folding of viroporins. We start by describing the transmembrane segment architecture of viroporins, including the number and sequence characteristics of their membrane-spanning domains. Next, we connect the differences found among viroporin families to their viral genome organization, and finalize focusing on the pathways used by viroporins in their way to the membrane and on the transmembrane helix-helix interactions required to achieve proper folding and assembly.
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Affiliation(s)
- Luis Martinez-Gil
- Department of Biochemistry and Molecular Biology, ERI BioTecMed, University of Valencia, Dr. Moliner 50, 46100 Burjassot, Spain.
| | - Ismael Mingarro
- Department of Biochemistry and Molecular Biology, ERI BioTecMed, University of Valencia, Dr. Moliner 50, 46100 Burjassot, Spain.
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