Quiescent cells were infected with HAN or HANΔRNA2.7 at an MOI of 1.0 for 72 h. DRB was added into the supernatant 4 h before cell collection at a final concentration of 200 nmol/L. Mock-infected cells were used as controls.
Transcriptions of MCM2, MCM4, MCM5, Cdt1 and Cdc6 were quantified from the cDNA using
QuantiTect SYBR Green-based PCR Kits (QIAGEN) on Applied Biosystems 7300 Fast Real-Time PCR System (Applied Biosystem). Primer details are listed in
Supplementary Table S2. The reaction conditions were as follows: an initial denaturation at 95 °C for 2 min, then 40 cycles of annealing/extension at 60 °C for 30 s followed by a final denaturation at 95 °C for 15 s. Detections were performed in biological triplicates and relative transcription levels of MCM2, MCM4, MCM5, Cdt1 and Cdc6 were normalized to that of housekeeping gene GAPDH in corresponding samples using 2
−ΔΔCT method.
Lysates were separated by SDS-PAGE. Blotted PVDF membranes were incubated with antibodies against Pol II S2 (Abcam, #
ab5095), Cdt1 (Abcam, #
ab202067), Cdc6 (Abcam, #
ab109315) and GAPDH, followed by peroxidase-conjugated goat anti-mouse or rabbit IgG (ZSGB-BIO, #
ZB-2305 or #ZB-2301).
Huang Y., Guo X., Zhang J., Li J., Xu M., Wang Q., Liu Z., Ma Y., Qi Y, & Ruan Q. (2022). Human cytomegalovirus RNA2.7 inhibits RNA polymerase II (Pol II) Serine-2 phosphorylation by reducing the interaction between Pol II and phosphorylated cyclin-dependent kinase 9 (pCDK9). Virologica Sinica, 37(3), 358-369.