Human Gene Set: BRUINS_UVC_RESPONSE_MIDDLE

For the Mouse gene set with the same name, see BRUINS_UVC_RESPONSE_MIDDLE

Standard name BRUINS_UVC_RESPONSE_MIDDLE
Systematic name M2249
Brief description Middle response genes: differentially expressed in the period between 3 h and 12 h after UV-C irradiation of MEF cells (embryonic fibroblast).
Full description or abstract Phosphorylation is important in p53-mediated DNA damage responses. After UV irradiation, p53 is phosphorylated specifically at murine residue Ser389. Phosphorylation mutant p53.S389A cells and mice show reduced apoptosis and compromised tumor suppression after UV irradiation. We investigated the underlying cellular processes by time-series analysis of UV-induced gene expression responses in wild-type, p53.S389A, and p53(-/-) mouse embryonic fibroblasts. The absence of p53.S389 phosphorylation already causes small endogenous gene expression changes for 2,253, mostly p53-dependent, genes. These genes showed basal gene expression levels intermediate to the wild type and p53(-/-), possibly to readjust the p53 network. Overall, the p53.S389A mutation lifts p53-dependent gene repression to a level similar to that of p53(-/-) but has lesser effect on p53-dependently induced genes. In the wild type, the response of 6,058 genes to UV irradiation was strictly biphasic. The early stress response, from 0 to 3 h, results in the activation of processes to prevent the accumulation of DNA damage in cells, whereas the late response, from 12 to 24 h, relates more to reentering the cell cycle. Although the p53.S389A UV gene response was only subtly changed, many cellular processes were significantly affected. The early response was affected the most, and many cellular processes were phase-specifically lost, gained, or altered, e.g., induction of apoptosis, cell division, and DNA repair, respectively. Altogether, p53.S389 phosphorylation seems essential for many p53 target genes and p53-dependent processes.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 18195040   Authors: Bruins W,Bruning O,Jonker MJ,Zwart E,van der Hoeven TV,Pennings JL,Rauwerda H,de Vries A,Breit TM
Exact source Table 2S: Found in=WT_II
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Source species Mus musculus
Contributed by Arthur Liberzon (MSigDB Team)
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identifier namespace		 MOUSE_SEQ_ACCESSION
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Version history 3.1: First introduced

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