کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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6135919 | 1224913 | 2013 | 9 صفحه PDF | دانلود رایگان |
Characterization of the primary host factors associated with host-virus interaction is critical for understanding how a virus infects its host cell. In this study, a modified virus overlay protein binding assay was developed. Host factors with 34, 43, and 55Â kDa proteins, which could interact with EDIII, a cell receptor-binding domain of Dengue virus (DENV)-enveloped E protein, were isolated from ECV304 cells. Mass spectrometry identified peptide masses of 43Â kDa protein matched to actin, a cytoskeleton protein in eukaryotic cells. The interaction between 43Â kDa actin and DENV-2 EDIII was further confirmed by competitive blocking and co-immunoprecipitation assays. Actin cytoskeleton rearrangement was observed within 1Â h p.i. of DENV-2-infected ECV304 cells in the confocal immunofluorescent assay. The co-localization of DENV-2 E protein with the actin filaments occurred in the late stage of the DENV replication cycle. Finally, a docking complex was constructed, and the functional residues involved in the interaction of actin and DENV-2 EDIII protein were predicted. Our findings suggest that the direct contact of DENV E protein with 43Â kDa actin protein may have a crucial function in DENV infection of ECV304 cells.
Journal: Microbes and Infection - Volume 15, Issue 4, April 2013, Pages 310-318