N-glycosylation in the Pre-Membrane Protein Is Essential for the Zika Virus Life CycleVisa övriga samt affilieringar
2020 (Engelska)Ingår i: Viruses, E-ISSN 1999-4915, Vol. 12, nr 9, artikel-id 925Artikel i tidskrift (Refereegranskat) Published
Abstract [en]
Asparagine (N)-linked protein glycosylation plays an important role in protein synthesis and modification. Two Zika virus (ZIKV) structural proteins, the pre-membrane (prM) and envelope (E) protein areN-glycosylated. The prM protein of all ZIKV strains contains a singleN-linked glycosylation site, while not all strains contain an N-linked site in the E protein. Our aim was to examine the impact of prM and E N-linked glycosylation on ZIKV infectivity and cell trafficking. Using a ZIKV infectious clone, we found that when theN-glycan sites were removed, the prM- and the prM/E-double mutants did not produce an infectious virus in the supernatant. Further, by using ZIKV prME constructs, we found thatN-glycosylation was necessary for effective secretion of ZIKV virions. The absence of theN-glycan on prM or E caused protein aggregation in the rough endoplasmatic reticulum (ER) compartment. The aggregation was more pronounced for the prM-mutation, and the mutant virus lost the ER-Golgi intermediate compartment (ERGIC) localization. In addition, lack of theN-glycan on prM induced nuclear translocation of CCAAT-enhancer-binding protein homologous protein (CHOP), an ER stress marker. To conclude, we show that the prMN-glycan is essential for the ZIKV infectious cycle, and plays an important role in viral protein trafficking, protein folding, and virion assembly.
Ort, förlag, år, upplaga, sidor
MDPI, 2020. Vol. 12, nr 9, artikel-id 925
Nyckelord [en]
Zika virus, N-glycosylation, pre-membrane, envelope, virus life cycle
Nationell ämneskategori
Mikrobiologi inom det medicinska området
Identifikatorer
URN: urn:nbn:se:umu:diva-176452DOI: 10.3390/v12090925ISI: 000580340900001PubMedID: 32842538Scopus ID: 2-s2.0-85089933821OAI: oai:DiVA.org:umu-176452DiVA, id: diva2:1502515
2020-11-202020-11-202024-01-17Bibliografiskt granskad