PMID- 25449571 OWN - NLM STAT- MEDLINE DCOM- 20150723 LR - 20200407 IS - 1872-7492 (Electronic) IS - 0168-1702 (Print) IS - 0168-1702 (Linking) VI - 195 DP - 2015 Jan 2 TI - The DEAD-box RNA helicase 5 positively regulates the replication of porcine reproductive and respiratory syndrome virus by interacting with viral Nsp9 in vitro. PG - 217-24 LID - S0168-1702(14)00438-9 [pii] LID - 10.1016/j.virusres.2014.10.021 [doi] AB - The nonstructural protein 9 (Nsp9) of porcine reproductive and respiratory syndrome virus (PRRSV) has been recognized to play important roles in viral replication. The present study first screened that the DEAD-box RNA helicase 5 (DDX5) was a cellular protein interacting with the Nsp9 of PRRSV by a yeast two-hybrid method in a pulmonary alveolar macrophages (PAMs) cDNA library. Next, DDX5 was shown to interact with viral Nsp9 in the co-transfected HEK293 cells with the DDX5- and Nsp9-expressing plasmids, and the interaction between endogenous DDX5 and Nsp9 was also confirmed in MARC-145 cells infected with the Nsp9-expressing lentiviruses. Then, the interacting domains between DDX5 and Nsp9 were determined to be the DEXDc and HELICc domains in DDX5 and the RdRp domain in Nsp9, respectively. Moreover, in the HEK293 cells, MARC-145 cells and PAM cell lines co-transfected with the DDX5- and Nsp9-expressing plasmids, Nsp9 was shown to co-localize with DDX5 in the cytoplasm with a perinuclear pattern, and meanwhile in PRRSV-infected MARC-145 cells and PAMs, endogenous DDX5 was also found to co-localize with Nsp9. Finally, silencing the DDX5 gene in MARC-145 cells significantly impacted the replication of PRRSV, and while the over-expression of DDX5 could slightly enhance viral replication. These findings indicate that DDX5 positively regulates the replication of PRRSV via its interaction with viral Nsp9 in vitro. CI - Copyright (c) 2014 Elsevier B.V. All rights reserved. FAU - Zhao, Shuangcheng AU - Zhao S AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. FAU - Ge, Xinna AU - Ge X AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. FAU - Wang, Xiaolong AU - Wang X AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. FAU - Liu, Aijing AU - Liu A AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. FAU - Guo, Xin AU - Guo X AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. FAU - Zhou, Lei AU - Zhou L AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. FAU - Yu, Kangzhen AU - Yu K AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China; The Ministry of Agriculture of the People's Republic of China, Beijing 100026, People's Republic of China. FAU - Yang, Hanchun AU - Yang H AD - Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine and State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China. Electronic address: yanghanchun1@cau.edu.cn. LA - eng SI - GENBANK/KM434334 PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20141101 PL - Netherlands TA - Virus Res JT - Virus research JID - 8410979 RN - 0 (Viral Nonstructural Proteins) RN - EC 3.6.4.13 (DEAD-box RNA Helicases) SB - IM MH - Animals MH - Cell Line MH - DEAD-box RNA Helicases/*metabolism MH - Humans MH - Macrophages, Alveolar/virology MH - Molecular Sequence Data MH - Porcine respiratory and reproductive syndrome virus/*physiology MH - Protein Binding MH - Protein Interaction Domains and Motifs MH - Protein Interaction Mapping MH - Sequence Analysis, DNA MH - Swine MH - Two-Hybrid System Techniques MH - Viral Nonstructural Proteins/*metabolism MH - *Virus Replication PMC - PMC7114378 OTO - NOTNLM OT - DEAD (Asp-Glu-Ala-Asp)-box RNA helicase 5 (DDX5) OT - Interaction OT - Nonstructural protein 9 (Nsp9) OT - Porcine reproductive and respiratory syndrome virus (PRRSV) OT - Replication EDAT- 2014/12/03 06:00 MHDA- 2015/07/24 06:00 PMCR- 2014/11/01 CRDT- 2014/12/03 06:00 PHST- 2014/09/01 00:00 [received] PHST- 2014/10/24 00:00 [revised] PHST- 2014/10/27 00:00 [accepted] PHST- 2014/12/03 06:00 [entrez] PHST- 2014/12/03 06:00 [pubmed] PHST- 2015/07/24 06:00 [medline] PHST- 2014/11/01 00:00 [pmc-release] AID - S0168-1702(14)00438-9 [pii] AID - 10.1016/j.virusres.2014.10.021 [doi] PST - ppublish SO - Virus Res. 2015 Jan 2;195:217-24. doi: 10.1016/j.virusres.2014.10.021. Epub 2014 Nov 1.