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Cell. 2005 Dec 2;123(5):833-47.

A nuclear function of beta-arrestin1 in GPCR signaling: regulation of histone acetylation and gene transcription.

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  • 1Laboratory of Molecular Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, The Graduate School, Chinese Academy of Sciences, Shanghai 200031, China.

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  • Cell. 2006 Feb 10;124(3):645.

Abstract

Chromatin modification is considered to be a fundamental mechanism of regulating gene expression to generate coordinated responses to environmental changes, however, whether it could be directly regulated by signals mediated by G protein-coupled receptors (GPCRs), the largest surface receptor family, is not known. Here, we show that stimulation of delta-opioid receptor, a member of the GPCR family, induces nuclear translocation of beta-arrestin 1 (betaarr1), which was previously known as a cytosolic regulator and scaffold of GPCR signaling. In response to receptor activation, betaarr1 translocates to the nucleus and is selectively enriched at specific promoters such as that of p27 and c-fos, where it facilitates the recruitment of histone acetyltransferase p300, resulting in enhanced local histone H4 acetylation and transcription of these genes. Our results reveal a novel function of betaarr1 as a cytoplasm-nucleus messenger in GPCR signaling and elucidate an epigenetic mechanism for direct GPCR signaling from cell membrane to the nucleus through signal-dependent histone modification.

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PMID:
16325578
[PubMed - indexed for MEDLINE]
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