Abstract
ABSTRACTInfluenza viruses encoding hemagglutinin (HA) and neuraminidase (NA) glycoproteins with deletions in one or both cytoplasmic tails (HAt− or NAt−) have a reduced association with detergent-insoluble glycolipids (DIGs). Mutations which eliminated various combinations of the three palmitoylation sites in HA exhibited reduced amounts of DIG-associated HA in virus-infected cells. The influenza virus matrix (M1) protein was also found to be associated with DIGs, but this association was decreased in cells infected with HAt− or NAt− virus. Regardless of the amount of DIG-associated protein, the HA and NA glycoproteins were targeted primarily to the apical surface of virus-infected, polarized cells. The uncoupling of DIG association and apical transport was augmented by the observation that the influenza A virus M2protein as well as the influenza C virus HA-esterase-fusion glycoprotein were not associated with DIGs but were apically targeted. The reduced DIG association of HAt− and NAt− is an intrinsic property of the glycoproteins, as similar reductions in DIG association were observed when the proteins were expressed from cDNA. Examination of purified virions indicated reduced amounts of DIG-associated lipids in the envelope of HAt− and NAt− viruses. The data indicate that deletion of both the HA and NA cytoplasmic tails results in reduced DIG association and changes in both virus polypeptide and lipid composition.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 27, 2002, 1:58 a.m.) |
Deposited | 1 year, 7 months ago (Jan. 5, 2024, 1:55 p.m.) |
Indexed | 1 month, 3 weeks ago (June 25, 2025, 1:24 a.m.) |
Issued | 25 years, 3 months ago (May 15, 2000) |
Published | 25 years, 3 months ago (May 15, 2000) |
Published Print | 25 years, 3 months ago (May 15, 2000) |
@article{Zhang_2000, title={Influenza Virus Assembly and Lipid Raft Microdomains: a Role for the Cytoplasmic Tails of the Spike Glycoproteins}, volume={74}, ISSN={1098-5514}, url={http://dx.doi.org/10.1128/jvi.74.10.4634-4644.2000}, DOI={10.1128/jvi.74.10.4634-4644.2000}, number={10}, journal={Journal of Virology}, publisher={American Society for Microbiology}, author={Zhang, Jie and Pekosz, Andrew and Lamb, Robert A.}, year={2000}, month=may, pages={4634–4644} }