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© Research
Publication : Scientific reports

The Interactome analysis of the Respiratory Syncytial Virus protein M2-1 suggests a new role in viral mRNA metabolism post-transcription.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Scientific reports - 24 Oct 2019

Bouillier C, Cosentino G, Léger T, Rincheval V, Richard CA, Desquesnes A, Sitterlin D, Blouquit-Laye S, Eléouët JF, Gault E, Rameix-Welti MA,

Link to Pubmed [PMID] – 31649314

Link to DOI – 1525810.1038/s41598-019-51746-0

Sci Rep 2019 Oct; 9(1): 15258

Human respiratory syncytial virus (RSV) is a globally prevalent negative-stranded RNA virus, which can cause life-threatening respiratory infections in young children, elderly people and immunocompromised patients. Its transcription termination factor M2-1 plays an essential role in viral transcription, but the mechanisms underpinning its function are still unclear. We investigated the cellular interactome of M2-1 using green fluorescent protein (GFP)-trap immunoprecipitation on RSV infected cells coupled with mass spectrometry analysis. We identified 137 potential cellular partners of M2-1, among which many proteins associated with mRNA metabolism, and particularly mRNA maturation, translation and stabilization. Among these, the cytoplasmic polyA-binding protein 1 (PABPC1), a candidate with a major role in both translation and mRNA stabilization, was confirmed to interact with M2-1 using protein complementation assay and specific immunoprecipitation. PABPC1 was also shown to colocalize with M2-1 from its accumulation in inclusion bodies associated granules (IBAGs) to its liberation in the cytoplasm. Altogether, these results strongly suggest that M2-1 interacts with viral mRNA and mRNA metabolism factors from transcription to translation, and imply that M2-1 may have an additional role in the fate of viral mRNA downstream of transcription.

https://pubmed.ncbi.nlm.nih.gov/31649314