N-glycosylation in the Pre-Membrane Protein Is Essential for the Zika Virus Life Cycle

Yong-Dae, Kwon, 1984- (author): Umeå universitet,Umeå Centre for Microbial Research (UCMR),Institutionen för klinisk mikrobiologi,Magnus Evander

Zusinaite, Eva (author)

Merits, Andres (author)

Överby, Anna K., 1978- (author): Umeå universitet,Molekylär Infektionsmedicin, Sverige (MIMS),Institutionen för klinisk mikrobiologi,Anna Överby

Evander, Magnus, 1959- (author): Umeå universitet,Umeå Centre for Microbial Research (UCMR),Institutionen för klinisk mikrobiologi,Magnus Evander

(creator_code:org_t)

Related links:: https://doi.org/10.3...; show more...; https://umu.diva-por... (primary) (Raw object); https://www.mdpi.com...; https://urn.kb.se/re...; https://doi.org/10.3...; show less...

Abstract Subject headings

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.

By the author/editor: Yong-Dae, Kwon, ...; Zusinaite, Eva; Merits, Andres; Överby, Anna K., ...; Evander, Magnus, ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Microbiology in ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.