2. Academic Validation
  3. SRCAP is involved in porcine reproductive and respiratory syndrome virus activated Notch signaling pathway

SRCAP is involved in porcine reproductive and respiratory syndrome virus activated Notch signaling pathway

  • J Virol. 2024 Dec 17;98(12):e0121624. doi: 10.1128/jvi.01216-24.
Guofei Ding # 1 2,  Yingchao Li # 1 2,  Dexin Li 1 2,  Mingyu Dou 1 2,  Chaolun Fu 1 2,  Ting Chen 1 2,  Xinyu Cui 1 2,  Qin Zhang 1 2,  Pingping Yang 1 2,  Yanmeng Hou 1 2,  Sidang Liu 1 2,  Yihong Xiao 1 2
Affiliations

Affiliations

  • 1 Department of Fundamental Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong, China.
  • 2 Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, Tai'an, Shandong, China.
  • # Contributed equally.
PMID: 39530666 DOI: 10.1128/jvi.01216-24
Abstract

Porcine reproductive and respiratory syndrome virus (PRRSV) is the cause of porcine reproductive and respiratory syndrome (PRRS); a disease of pigs, which results in great economic losses in the pork industry. The non-structural protein 4 (Nsp4), a 3C-like serine protease responsible for most non-structural protein processing, plays an essential role in PRRSV Infection. We used label-free quantitative proteomics to elucidate the Nsp4 interactome and SRCAP was identified as one of the interactors. SRCAP facilitated PRRSV Infection by activating non-canonical Notch signaling. The ATPase I-IV domain in SRCAP and the 122VITEA126 in Nsp4 were identified as the interacting sites. The Infection of recovered mutant rTA-12/5A (122AAAAA126) could not activate Notch signaling. The results indicated that 122VITEA126 in Nsp4 were key sites to determine the function of SRCAP and their interaction. A function of Nsp4 in activating the Notch signaling pathway was discovered. Block Notch signaling pathway could inhibit PRRSV Infection both in vitro and in vivo which may lead to the development of novel therapeutic Antiviral strategies.

Importance: In the present study, the interactome of the NSP4 originating from PRRSV was studied and SRCAP was confirmed as one of the interactors. Mechanism study showed the interaction of Nsp4 and SRCAP was found to facilitate PRRSV Infection by activating non-canonical Notch signaling. ATPase Ⅰ-Ⅳ domain in SRCAP and the 122VITEA126 in Nsp4 were identified as the interacting sites that demined the activating of Notch signaling. Block Notch signaling pathway could inhibit PRRSV Infection in vitro and in vivo which may be a new target for Antiviral drug development.

Keywords

SRCAP; antiviral drug; interactions; non-canonical Notch signaling; non-structural protein 4; porcine reproductive and respiratory syndrome virus.

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