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Status: Bibliographieeintrag

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Verfasst von:Jirasko, Vlastimil [VerfasserIn]   i
 Montserret, Roland [VerfasserIn]   i
 Lee, Ji Young [VerfasserIn]   i
 Gouttenoire, Jérôme [VerfasserIn]   i
 Moradpour, Darius [VerfasserIn]   i
 Penin, Francois [VerfasserIn]   i
 Bartenschlager, Ralf [VerfasserIn]   i
Titel:Structural and functional studies of nonstructural protein 2 of the hepatitis C virus reveal its key Role as organizer of virion assembly
Verf.angabe:Vlastimil Jirasko, Roland Montserret, Ji Young Lee, Jérôme Gouttenoire, Darius Moradpour, Francois Penin, Ralf Bartenschlager
E-Jahr:2010
Jahr:December 16, 2010
Umfang:22 S.
Fussnoten:Gesehen am 28.08.2023
Titel Quelle:Enthalten in: Public Library of SciencePLoS pathogens
Ort Quelle:Lawrence, Kan. : PLoS, 2005
Jahr Quelle:2010
Band/Heft Quelle:6(2010), 12, Artikel-ID e1001233, Seite 1-22
ISSN Quelle:1553-7374
Abstract:Non-structural protein 2 (NS2) plays an important role in hepatitis C virus (HCV) assembly, but neither the exact contribution of this protein to the assembly process nor its complete structure are known. In this study we used a combination of genetic, biochemical and structural methods to decipher the role of NS2 in infectious virus particle formation. A large panel of NS2 mutations targeting the N-terminal membrane binding region was generated. They were selected based on a membrane topology model that we established by determining the NMR structures of N-terminal NS2 transmembrane segments. Mutants affected in virion assembly, but not RNA replication, were selected for pseudoreversion in cell culture. Rescue mutations restoring virus assembly to various degrees emerged in E2, p7, NS3 and NS2 itself arguing for an interaction between these proteins. To confirm this assumption we developed a fully functional JFH1 genome expressing an N-terminally tagged NS2 demonstrating efficient pull-down of NS2 with p7, E2 and NS3 and, to a lower extent, NS5A. Several of the mutations blocking virus assembly disrupted some of these interactions that were restored to various degrees by those pseudoreversions that also restored assembly. Immunofluorescence analyses revealed a time-dependent NS2 colocalization with E2 at sites close to lipid droplets (LDs) together with NS3 and NS5A. Importantly, NS2 of a mutant defective in assembly abrogates NS2 colocalization around LDs with E2 and NS3, which is restored by a pseudoreversion in p7, whereas NS5A is recruited to LDs in an NS2-independent manner. In conclusion, our results suggest that NS2 orchestrates HCV particle formation by participation in multiple protein-protein interactions required for their recruitment to assembly sites in close proximity of LDs.
DOI:doi:10.1371/journal.ppat.1001233
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: https://doi.org/10.1371/journal.ppat.1001233
 kostenfrei: Volltext: https://journals.plos.org/plospathogens/article?id=10.1371/journal.ppat.1001233
 DOI: https://doi.org/10.1371/journal.ppat.1001233
Datenträger:Online-Ressource
Sprache:eng
Sach-SW:Genomics
 Hepatitis C virus
 Insertion mutation
 Microbial mutation
 Protein interactions
 RNA structure
 Substitution mutation
 Transfection
K10plus-PPN:1858103606
Verknüpfungen:→ Zeitschrift

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