Regulation of coactivator complex assembly and function by protein arginine methylation and demethylimination.
Nuclear receptors activate transcription by recruiting multiple coactivators to the promoters of specific target genes. The functional synergy of the p160 coactivators [steroid receptor coactivator-1, glucocorticoid receptor interacting protein (GRIP1), or the activator for thyroid hormone and retinoid receptors], the histone acetyltransferases cAMP response element binding protein binding protein (CBP) and p300 and the histone methyltransferase coactivator-associated arginine methyltransferase (CARM1) depends on the methyltransferase activity of CARM1. CARM1 methylates histone H3 and other factors including the N-terminal region of p300. Here, we report that CARM1 also methylates Arg-2142 within the C-terminal GRIP1 binding domain (GBD) of p300. In the GBD, both Arg-2088 and Arg-2142 are important for binding GRIP1. Methylation of Arg-2142 inhibits the bimolecular interaction of GRIP1 to p300 in vitro and in vivo. This methylation mark of p300 GBD is removed by peptidyl deiminase 4, thereby enhancing the p300-GRIP1 interaction. These methylation and demethylimination events also alter the conformation and activity of the coactivator complex and regulate estrogen receptor-mediated transcription, and they thus represent unique mechanisms for regulating coactivator complex assembly, conformation, and function.
Lee
Young-Ho
YH
Department of Pathology, University of Southern California, 2011 Zonal Avenue, HMR 301, Los Angeles, CA 90089, USA.
Coonrod
Scott A
SA
Kraus
W Lee
WL
Jelinek
Mary Anne
MA
Stallcup
Michael R
MR
D001120:Arginine / Q000378:metabolism*; D001665:Binding Sites; D006801:Humans; D008745:Methylation; D009687:Nuclear Proteins / Q000737:chemistry* / Q000502:physiology; D051958:Nuclear Receptor Coactivator 2; D011487:Protein Conformation; D011484:Protein-Arginine N-Methyltransferases / Q000502:physiology*; D011960:Receptors, Estrogen / Q000502:physiology; D015534:Trans-Activators / Q000737:chemistry* / Q000502:physiology; D014157:Transcription Factors / Q000737:chemistry* / Q000502:physiology; D015533:Transcriptional Activation
C498001:NCOA2 protein, human; D009687:Nuclear Proteins; D051958:Nuclear Receptor Coactivator 2; D011960:Receptors, Estrogen; D015534:Trans-Activators; D014157:Transcription Factors; D001120:Arginine; D011484:Protein-Arginine N-Methyltransferases; C119966:coactivator-associated arginine methyltransferase 1
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