2011
DOI: 10.1016/j.yexcr.2011.07.001
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Evidence that phosphorylation by the mitotic kinase Cdk1 promotes ICER monoubiquitination and nuclear delocalization

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Cited by 7 publications
(9 citation statements)
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“…The initially described post-transcriptional regulation was polyubiquitination, which guided ICER to proteasome degradation (39). Recently, phosphorylation with the mitotic kinase CDK1 was also described, resulting in ICER export to the cytoplasm (26).When ICER is overexpressed in cell lines, it is usually phosphorylated and therefore not active as a transcription factor. Cyclin D 1 was not successfully silenced when intact ICER was used for the transfections, but when lysines at the phosphorylation sites were changed to arginines, repression was achieved (26).…”
Section: Discussionmentioning
confidence: 99%
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“…The initially described post-transcriptional regulation was polyubiquitination, which guided ICER to proteasome degradation (39). Recently, phosphorylation with the mitotic kinase CDK1 was also described, resulting in ICER export to the cytoplasm (26).When ICER is overexpressed in cell lines, it is usually phosphorylated and therefore not active as a transcription factor. Cyclin D 1 was not successfully silenced when intact ICER was used for the transfections, but when lysines at the phosphorylation sites were changed to arginines, repression was achieved (26).…”
Section: Discussionmentioning
confidence: 99%
“…Recently, phosphorylation with the mitotic kinase CDK1 was also described, resulting in ICER export to the cytoplasm (26).When ICER is overexpressed in cell lines, it is usually phosphorylated and therefore not active as a transcription factor. Cyclin D 1 was not successfully silenced when intact ICER was used for the transfections, but when lysines at the phosphorylation sites were changed to arginines, repression was achieved (26). In accordance with this, we have shown that the majority of the overexpressed ICER in Hepa 1-6 cells ends in the cytoplasm and not in the nucleus (Fig.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Interestingly, Mémin et al recently showed that CDK1 phosphorylated the ICER (inducible cyclic AMP early repressor) splice variant of CREM on Ser-35, which is analogous to CREB Ser-271 (52). Thus, mitotic phosphorylation of positionally conserved CDK1 sites appears to be common to all members of the CREB/ATF family of transcription factors.…”
Section: Discussionmentioning
confidence: 99%
“…Typically described as having an inactivating genetic mutation [1], there is a growing understanding of the tumor suppressor protein displaying a loss‐of‐function while having an intact gene. This epigenetic inactivation has been recognized in several proteins [2–8]; where the loss of function is a result of protein degradation or translocation.…”
Section: Introductionmentioning
confidence: 99%