Membrane alterations induced by nonstructural proteins of human norovirus
Publication Date
October 27, 2017
Authors
Sylvie Y. Doerflinger, Mirko Cortese, Inés Romero Brey, Zach Menne, et al
Volume
13
Issue
10
Pages
e1006705
DOI
https://dx.plos.org/10.1371/journal.ppat.1006705
Publisher URL
http://journals.plos.org/plospathogens/article?id=10.1371%2Fjournal.ppat.1006705
Scopus
85033214811
Mendeley
http://www.mendeley.com/research/membrane-alterations-induced-nonstructural-proteins-human-norovirus-2
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Mendeley | Further Information

{"title"=>"Membrane alterations induced by nonstructural proteins of human norovirus", "type"=>"journal", "authors"=>[{"first_name"=>"Sylvie Y.", "last_name"=>"Doerflinger", "scopus_author_id"=>"56193242900"}, {"first_name"=>"Mirko", "last_name"=>"Cortese", "scopus_author_id"=>"55511795600"}, {"first_name"=>"Inés", "last_name"=>"Romero-Brey", "scopus_author_id"=>"35206532000"}, {"first_name"=>"Zach", "last_name"=>"Menne", "scopus_author_id"=>"57195296681"}, {"first_name"=>"Thibault", "last_name"=>"Tubiana", "scopus_author_id"=>"56868617900"}, {"first_name"=>"Christian", "last_name"=>"Schenk", "scopus_author_id"=>"57192544416"}, {"first_name"=>"Peter A.", "last_name"=>"White", "scopus_author_id"=>"35286253700"}, {"first_name"=>"Ralf", "last_name"=>"Bartenschlager", "scopus_author_id"=>"7007011273"}, {"first_name"=>"Stéphane", "last_name"=>"Bressanelli", "scopus_author_id"=>"6505911654"}, {"first_name"=>"Grant S.", "last_name"=>"Hansman", "scopus_author_id"=>"6603445567"}, {"first_name"=>"Volker", "last_name"=>"Lohmann", "scopus_author_id"=>"6701511106"}], "year"=>2017, "source"=>"PLoS Pathogens", "identifiers"=>{"pui"=>"619157802", "issn"=>"15537374", "isbn"=>"1111111111", "doi"=>"10.1371/journal.ppat.1006705", "scopus"=>"2-s2.0-85033214811", "pmid"=>"29077760", "sgr"=>"85033214811"}, "id"=>"0925d709-fd5d-38ef-9b08-5541b40bbc32", "abstract"=>"Human noroviruses (huNoV) are the most frequent cause of non-bacterial acute gastroenteritis worldwide, particularly genogroup II genotype 4 (GII.4) variants. The viral nonstructural (NS) proteins encoded by the ORF1 polyprotein induce vesical clusters harboring the viral replication sites. Little is known so far about the ultrastructure of these replication organelles or the contribution of individual NS proteins to their biogenesis. We compared the ultrastructural changes induced by expression of norovirus ORF1 polyproteins with those induced upon infection with murine norovirus (MNV). Characteristic membrane alterations induced by ORF1 expression resembled those found in MNV infected cells, consisting of vesicle accumulations likely built from the endoplasmic reticulum (ER) which included single membrane vesicles (SMVs), double membrane vesicles (DMVs) and multi membrane vesicles (MMVs). In-depth analysis using electron tomography suggested that MMVs originate through the enwrapping SMVs with tubular structures similar to mechanisms reported for picornaviruses. Expression of GII.4 NS1-2, NS3 and NS4 fused to GFP revealed distinct membrane alterations when analyzed by correlative light and electron microscopy. Expression of NS1-2 induced proliferation of smooth ER membranes forming long tubular structures that were affected by mutations in the active center of the putative NS1-2 hydrolase domain. NS3 was associated with ER membranes around lipid droplets (LDs) and induced the formation of convoluted membranes, which were even more pronounced in case of NS4. Interestingly, NS4 was the only GII.4 protein capable of inducing SMV and DMV formation when expressed individually. Our work provides the first ultrastructural analysis of norovirus GII.4 induced vesicle clusters and suggests that their morphology and biogenesis is most similar to picornaviruses. We further identified NS4 as a key factor in the formation of membrane alterations of huNoV and provide models of the putative membrane topologies of NS1-2, NS3 and NS4 to guide future studies.", "link"=>"http://www.mendeley.com/research/membrane-alterations-induced-nonstructural-proteins-human-norovirus-2", "reader_count"=>4, "reader_count_by_academic_status"=>{"Researcher"=>1, "Student > Ph. D. Student"=>2, "Student > Master"=>1}, "reader_count_by_user_role"=>{"Researcher"=>1, "Student > Ph. D. Student"=>2, "Student > Master"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>1, "Unspecified"=>1, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>1}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>1}}, "group_count"=>0}

Scopus | Further Information

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