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The FG extended loop in domain III of the dengue virus type 2 (DENV2) envelope protein is postulated to be a molecular determinant for host cell infectivity. To determine the contribution of the FG loop to virus infectivity, an infectious cDNA clone of DENV2 was manipulated by deleting amino acids in the loop (VEPGΔ) to mimic tick-borne flaviviruses or by substituting these AAs with RGD or RGDK/S...
To determine the importance of dengue 2 virus (DEN2V) envelope (E) protein glycosylation, virus mutants in one or both of the N-linked glycosylation motifs were prepared. We found that while the E2 mutant virus (N153Q) replicated in mammalian and mosquito cells, the E1 (N67Q) and E1/2 (N67Q and N153Q) mutant viruses were unable to grow in mammalian cells. Infection of C6/36 mosquito cells with either...
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