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Human transcription elongation factor CA150 localizes to splicing factor-rich nuclear speckles and assembles transcription and splicing components into complexes through its amino and carboxyl regions
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Sánchez-Alvarez M Goldstrohm AC Garcia-Blanco MA Suñé C 《Molecular and cellular biology》2006,26(13):4998-5014
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Uta-Maria Bauer Sylvain Daujat S?ren J. Nielsen Karl Nightingale Tony Kouzarides 《EMBO reports》2002,3(1):39-44
The nuclear hormone receptor co-activator CARM1 has the potential to methylate histone H3 at arginine residues in vitro. The methyltransferase activity of CARM1 is necessary for its co-activator functions in transient transfection assays. However, the role of this methyltransferase in vivo is unclear, given that methylation of arginines is not easily detectable on histones. We have raised an antibody that specifically recognizes methylated arginine 17 (R17) of histone H3, the major site of methylation by CARM1. Using this antibody we show that methylated R17 exists in vivo. Chromatin immunoprecipitation analysis shows that R17 methylation on histone H3 is dramatically upregulated when the estrogen receptor-regulated pS2 gene is activated. Coincident with the appearance of methylated R17, CARM1 is found associated with the histones on the pS2 gene. Together these results demonstrate that CARM1 is recruited to an active promoter and that CARM1-mediated R17 methylation on histone H3 takes place in vivo during this active state. 相似文献
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