FIG 2.

DNase activity of ORF37 did not affect latent/lytic KSHV DNA synthesis but rather virion production. (A and B) Comparison of intracellular KSHV genome copies in latent/uninduced and 48-hpi 293L/wt and 293L/Q129H cells, as analyzed by qPCR. The values were normalized to GAPDH and calculated relative to BAC16-wt, defined as 1. Equal numbers of KSHV genome copies were maintained during the latent phase; however, only a slight decrease in KSHV genome copies was observed during the lytic phase of virus replication. (C) Detection of extracellular KSHV progeny virion production in the supernatants of 5-dpi 293L/wt and 293L/Q129H cells revealed a 10-fold decrease in virus production in 293L/Q129H supernatants compared to wt supernatants. (D and E) HEK293L cells infected with 293L/wt and 293L/Q129H virus supernatants were assayed by flow cytometry 2 days postinfection. The side scatter (SSC) versus forward scatter (FSC) plot was used to identify GFP-positive cells/signals. (F) Mean value of at least three independent experiments from the values determined in panel E. The error bars represent standard deviations of the mean from the results of three different experiments; ***, P < 0.001.