ChIP-seq data of prefoldin subunit PFDN5 in HCT116 human colon carcinoma cells

Prefoldin is a heterohexameric complex conserved from archaea to humans that plays a cochaperone role during the co-translational folding of actin and tubulin monomers. Additional functions of prefoldin in the cell nucleus have been described, including a positive contribution to transcription elongation and chromatin dynamics in yeast. Here we show that prefoldin perturbations provoked transcriptional alterations across the genome of human cells. We detected genome-wide prefoldin binding to transcribed genes and found that this binding negatively correlate with the impact of prefoldin depletion on gene expression. Moreover, lack of prefoldin caused significant global decrease in the levels of Ser2 and Ser5 phosphorylation of the RNA polymerase II carboxy-terminal domain (CTD). Altogether the reported results indicate that human prefoldin is able to act locally on the genome to modulate gene expression by influencing phosphorylation of elongating RNA polymerase II, and thereby regulating co-transcriptional splicing. Overall design: ChIP-seq using anti-Flag antibody was carried out in HCT116 Flag-PFDN5 or HCT116-containing Flag cell lines.