Project description:To identify which mRNAs bind to RBM4/HIF-2a Two PAR-CLIPs were performed: One of an RBM4 immunoprecipitation, and the other of a HIF-2a immunoprecipitation and excising the associated RBM4 band.
Project description:We hypothesized that RBM4 regulates HERVs by directly binding to their transcripts. To test this possibility, we performed photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation (PAR-CLIP). We performed four independent PAR-CLIP replicates of our own using HAP1 cells stably expressing a FLAG-tagged RBM4 (FLAG-RBM4) transgene under control of a doxycycline-inducible promoter. Following metabolic labeling with 4-thiouridine (4SU) and crosslinking with ultraviolet light (UV) of 312 nm wavelength, we isolated RNA covalently linked to FLAG-RBM4. The RNA recovered from four biological replicates was converted into cDNA libraries and deep sequenced.
Project description:This is a part of the study that shows that a host microRNA, miR-138, represses herpes simplex virus 1 (HSV-1) gene expression through both viral and host targets. These PAR-CLIP analyses identified viral and host targets of miR-138 in Neuro-2a (mouse neuroblastoma) and 293T (human embryonic kidney) cells. We constructed two cell lines derived from Neuro-2a cells, one overexpressing miR-138 (N2A138) and one antagonizing miR-138 (N2Aanti138). We also constructed two cell lines derived from 293T cells, one overexpressing miR-138 (293T138) and one control cells (293Tcontrol). Uninfected N2A138 and N2Aanti138 were compared by PAR-CLIP for host targets in Neuro-2A cells. 293T138 and 293Tcontrol cells infected for 4 and 8 hours were compared by PAR-CLIP for HSV-1 targets in 293T cells. 293T138 and 293Tcontrol cells infected for 4 hours were also compared for host targets in 293T cells.