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Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 eLife 2017 ; 6 (ä): ä Nephropedia Template TP
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Palmitoylated SCP1 is targeted to the plasma membrane and negatively regulates angiogenesis #MMPMID28440748
Liao P; Wang W; Li Y; Wang R; Jin J; Pang W; Chen Y; Shen M; Wang X; Jiang D; Pang J; Liu M; Lin X; Feng XH; Wang P; Ge X
eLife 2017[]; 6 (ä): ä PMID28440748show ga
SCP1 as a nuclear transcriptional regulator acts globally to silence neuronal genes and to affect the dephosphorylation of RNA Pol ll. However, we report the first finding and description of SCP1 as a plasma membrane-localized protein in various cancer cells using EGFP- or other epitope-fused SCP1. Membrane-located SCP1 dephosphorylates AKT at serine 473, leading to the abolishment of serine 473 phosphorylation that results in suppressed angiogenesis and a decreased risk of tumorigenesis. Consistently, we observed increased AKT phosphorylation and angiogenesis followed by enhanced tumorigenesis in Ctdsp1 (which encodes SCP1) gene - knockout mice. Importantly, we discovered that the membrane localization of SCP1 is crucial for impeding angiogenesis and tumor growth, and this localization depends on palmitoylation of a conserved cysteine motif within its NH2 terminus. Thus, our study discovers a novel mechanism underlying SCP1 shuttling between the plasma membrane and nucleus, which constitutes a unique pathway in transducing AKT signaling that is closely linked to angiogenesis and tumorigenesis.DOI:http://dx.doi.org/10.7554/eLife.22058.001