title: RNA helicase is involved in the expression and replication of classical swine fever virus and interacts with untranslated region.
abstract: To investigate whether cytoplasmic RNA helicase A (RHA) influences the expression and replication of classical swine fever virus (CSFV), an siRNA molecule targeted to RHA was transfected into PK-15 cells. The siRNA was found to reduce cytoplasmic RHA. In CSFV subgenomic replicon transfected cells, incubation with the siRNAs negatively impacted viral NS3 and RNA production. In the CSFV infected cells, treatment with the siRNA resulted in a significant reduction of viral replication by 65-70%. Furthermore, affinity chromatography and UV-crosslinking assays revealed that RHA can bind the 5' and 3' terminal region of CSFV 3'-untranslated region (UTR), the 5' terminal region and domain III of CSFV 5' UTR. All these regions are important for viral replication and translation. These data showed that RHA is involved in the expression and replication of CSFV and might participate in modulation of RNA synthesis, replication and translation of CSFV by binding these regions.
authors.affiliation: College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200234, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Sheng
authors.forename: Yuting
authors.initials: Y
authors.lastname: Yao
authors.forename: Bing
authors.initials: B
authors.lastname: Chen
authors.forename: Yujing
authors.initials: Y
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Xiao
mesh_terms: D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D002460:Cell Line; D006692:Classical Swine Fever Virus / Q000201:enzymology* / Q000235:genetics*; D015967:Gene Expression Regulation, Viral; D020868:Gene Silencing; D009690:Nucleic Acid Conformation; D020365:RNA Helicases / Q000235:genetics* / Q000378:metabolism; D034622:RNA Interference; D012367:RNA, Viral; D020506:Untranslated Regions; D014779:Virus Replication
chemical_list: D012367:RNA, Viral; D020506:Untranslated Regions; D020365:RNA Helicases