PMID- 36678439 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230201 IS - 2076-0817 (Print) IS - 2076-0817 (Electronic) IS - 2076-0817 (Linking) VI - 12 IP - 1 DP - 2023 Jan 5 TI - HSP27 Interacts with Nonstructural Proteins of Porcine Reproductive and Respiratory Syndrome Virus and Promotes Viral Replication. LID - 10.3390/pathogens12010091 [doi] LID - 91 AB - Heat shock protein 27 (HSP27) is a multifunctional protein and belongs to the small HSP family. It has been shown that HSP27 is involved in viral replication as a cellular chaperone, but the function of HSP27 during porcine reproductive and respiratory syndrome virus (PRRSV) infections remains unexplored. Here, we found that PRRSV replication can induce HSP27 expression and phosphorylation in vitro. HSP27 overexpression promoted PRRSV replication, whereas its knockdown reduced PRRSV proliferation. Additionally, suppressing HSP27 phosphorylation reduced PRRSV replication and the level of viral double-stranded RNA (dsRNA), a marker of the viral replication and transcription complexes (RTCs). Furthermore, HSP27 can interact with multiple viral nonstructural proteins (nsps), including nsp1alpha, nsp1beta, nsp5, nsp9, nsp11 and nsp12. Suppressing the phosphorylation of HSP27 almost completely disrupted its interaction with nsp1beta and nsp12. Altogether, our study revealed that HSP27 plays an important role in PRRSV replication. FAU - Song, Chunhui AU - Song C AD - College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China. FAU - Liu, Hanze AU - Liu H AD - China Animal Health and Epidemiology Center, Qingdao 266032, China. FAU - Cao, Zhi AU - Cao Z AD - College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China. FAU - Shan, Hu AU - Shan H AD - College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China. FAU - Zhang, Qiaoya AU - Zhang Q AUID- ORCID: 0000-0002-7712-7670 AD - College of Veterinary Medicine, Qingdao Agricultural University, Qingdao 266109, China. LA - eng GR - 31902259/National Natural Sciences Foundation of China/ GR - 1119029/Research Foundation for Distinguished Scholars of Qingdao Agricultural University/ PT - Journal Article DEP - 20230105 PL - Switzerland TA - Pathogens JT - Pathogens (Basel, Switzerland) JID - 101596317 PMC - PMC9860683 OTO - NOTNLM OT - heat shock protein 27 (HSP27) OT - nonstructural proteins OT - porcine reproductive and respiratory syndrome virus (PRRSV) OT - viral replication COIS- The authors declare no conflict of interest. EDAT- 2023/01/22 06:00 MHDA- 2023/01/22 06:01 PMCR- 2023/01/05 CRDT- 2023/01/21 01:48 PHST- 2022/11/29 00:00 [received] PHST- 2022/12/30 00:00 [revised] PHST- 2023/01/03 00:00 [accepted] PHST- 2023/01/21 01:48 [entrez] PHST- 2023/01/22 06:00 [pubmed] PHST- 2023/01/22 06:01 [medline] PHST- 2023/01/05 00:00 [pmc-release] AID - pathogens12010091 [pii] AID - pathogens-12-00091 [pii] AID - 10.3390/pathogens12010091 [doi] PST - epublish SO - Pathogens. 2023 Jan 5;12(1):91. doi: 10.3390/pathogens12010091.