Abstract

Pigeon paramyxovirus type 1 (PPMV-1) belongs to the avian paramyxovirus type 1 group of viruses, which can cause tremors, torticollis, and respiratory signs in domestic and wild pigeons. The M protein of PPMV-1 is a multifunctional structural protein. It not only helps in the assembly, budding, and positioning of the virus but also inhibits the host's immune response and promotes replication of the virus in the host. In this study, the GST pull-down method was used to screen host proteins that interact with PPMV-1 M protein, and then mass spectrometry (MS) was used to analyse the screened host proteins. Enrichment analysis of the differentially expressed genes showed that the 77 screened proteins were highly associated with the gene ontology categories: protein synthesis, metabolism, and cell signalling pathway transduction. We selected NIMA-related kinase 7 (NEK7) as the candidate protein for co-localization analysis and co-immunoprecipitation verification. The results revealed that PPMV-1 M protein interacts with NEK7 of the host cell. This interactome study of PPMV-1 M protein will serve to clarify its function during viral replication and will provide a crucial theoretical basis for studying the pathogenic mechanism of PPMV-1.

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