{"doi":"10.1128/jvi.79.10.6172-6179.2005","title":"The Polypyrimidine Tract Binding Protein Is Required for Efficient Picornavirus Gene Expression and Propagation","abstract":"<jats:title>ABSTRACT</jats:title>\n          <jats:p>\n            Mammalian host factors required for efficient viral gene expression and propagation have been often recalcitrant to genetic analysis. A case in point is the function of cellular factors that\n            <jats:italic>trans</jats:italic>\n            -activate internal ribosomal entry site (IRES)-driven translation, which is operative in many positive-stranded RNA viruses, including all picornaviruses. These IRES\n            <jats:italic>trans</jats:italic>\n            -acting factors have been elegantly studied in vitro, but their in vivo importance for viral gene expression and propagation has not been widely confirmed experimentally. Here we use RNA interference to deplete mammalian cells of one such factor, the polypyrimidine tract binding protein, and test its requirement in picornavirus gene expression and propagation. Depletion of the polypyrimidine tract binding protein resulted in a marked delay of particle propagation and significantly decreased synthesis and accumulation of viral proteins of poliovirus and encephalomyocarditis virus. These effects could be partially restored by expression of an RNA interference-resistant exogenous polypyrimidine tract binding protein. These data indicate a critical role for the polypyrimidine tract binding protein in picornavirus gene expression and strongly suggest a requirement for efficient IRES-dependent translation.\n          </jats:p>","journal":"Journal of Virology","year":2005,"id":21607,"datarank":1.8226689694104494,"base_score":3.9512437185814275,"endowment":3.9512437185814275,"self_citation_contribution":0.5926865577872142,"citation_network_contribution":1.2299824116232352,"self_endowment_contribution":0.5926865577872142,"citer_contribution":1.2299824116232352,"corpus_percentile":null,"corpus_rank":null,"citation_count":51,"citer_count":44,"citers_with_citation_signal":40,"citers_with_endowment":40,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":138481,"name":"October M. Sessions","orcid":null,"position":1,"is_corresponding":false},{"id":138482,"name":"Eric J. Wagner","orcid":null,"position":2,"is_corresponding":false},{"id":138350,"name":"Matthias Gromeier","orcid":null,"position":3,"is_corresponding":false},{"id":138483,"name":"Mariano A. Garcia-Blanco","orcid":null,"position":4,"is_corresponding":false},{"id":138480,"name":"Paola M. Florez","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"base_score":3.9512437185814275,"endowment":3.9512437185814275,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"15858002","pmcid":"PMC1091667","openalex_id":"https://openalex.org/W2066815436","authors":[],"funders":[{"funder_name":"NCI NIH HHS","grant_id":"R01 CA087537","title":null},{"funder_name":"NCI NIH HHS","grant_id":"R55 CA087537","title":null},{"funder_name":"NIGMS NIH HHS","grant_id":"GM63090","title":null},{"funder_name":"NIGMS NIH HHS","grant_id":"R01 GM063090","title":null},{"funder_name":"NCI NIH HHS","grant_id":"CA87537","title":null}],"total_grants":5,"fwci":3.4833,"citation_percentile":0.92818798,"influential_citations":1,"citation_trend":[{"year":2012,"count":1},{"year":2013,"count":3},{"year":2014,"count":4},{"year":2015,"count":1},{"year":2016,"count":1},{"year":2018,"count":1},{"year":2019,"count":1},{"year":2020,"count":4},{"year":2021,"count":3},{"year":2023,"count":3},{"year":2024,"count":2}],"oa_status":"green","license":"https://journals.asm.org/non-commercial-tdm-license","oa_locations":[{"url":"http://dx.doi.org/10.1128/JVI.79.10.6172-6179.2005","host_type":"repository"},{"url":"https://europepmc.org/articles/pmc1091667?pdf=render","host_type":"GREEN"},{"url":"http://dx.doi.org/10.1128/JVI.79.10.6172-6179.2005","host_type":"repository"},{"url":"https://journals.asm.org/doi/pdf/10.1128/JVI.79.10.6172-6179.2005","host_type":"publisher"},{"url":"https://doi.org/10.1128/jvi.79.10.6172-6179.2005","host_type":"journal"},{"url":"https://pubmed.ncbi.nlm.nih.gov/15858002","host_type":"repository"}],"fields_of_study":["Viral Infections and Immunology Research","RNA and protein synthesis mechanisms","Viral gastroenteritis research and epidemiology","Medicine","Biology","DNA-Binding Proteins","Encephalomyocarditis virus","Gene Expression Regulation, Viral","Genes, Viral","HeLa Cells","Humans","Picornaviridae","Picornaviridae Infections","Poliovirus","Polypyrimidine Tract-Binding Protein","RNA, Small Interfering","Virus Replication"],"mesh_terms":["DNA-Binding Proteins","Encephalomyocarditis virus","Genes, Viral","HeLa Cells","Humans","Picornaviridae","Picornaviridae Infections","Virus Replication","Gene Expression Regulation, Viral","Poliovirus","RNA, Small Interfering","Polypyrimidine Tract-Binding Protein","Hela Cells"],"keywords":["Polypyrimidine tract-binding protein","Picornavirus","Biology","Polypyrimidine tract","Internal ribosome entry site","Translation (biology)","Gene expression","RNA-binding protein","RNA","Gene","Cell biology","Molecular biology","Virology","Genetics","Messenger RNA"],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-06-06T16:21:36.177837Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}