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Effects of phosphorylation by protein kinase CK2 on the human basal components of the RNA polymerase II transcription machinery
Author(s) -
Cabrejos María Eugenia,
Allende Catherine C.,
Maldonado Edio
Publication year - 2004
Publication title -
journal of cellular biochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 165
eISSN - 1097-4644
pISSN - 0730-2312
DOI - 10.1002/jcb.20209
Subject(s) - transcription factor ii a , transcription factor ii f , transcription factor ii e , rna polymerase ii , rna polymerase ii holoenzyme , transcription factor ii d , transcription factor ii b , microbiology and biotechnology , transcription preinitiation complex , biology , general transcription factor , phosphorylation , chemistry , promoter , genetics , gene , gene expression
We have investigated the role of phosphorylation by vertebrate protein kinase CK2 on the activity of the General Transcription Factors TFIIA, TFIIE, TFIIF, and RNAPII. The largest subunits of TFIIA, TFIIE, and TFIIF were phosphorylated by CK2 holoenzyme. Also, RNA polymerase II was phosphorylated by CK2 in the 214,000 and 20,500 daltons subunits. Our results show that phosphorylation of TFIIA, TFIIF, and RNAPII increase the formation of complexes on the TATA box of the Ad‐MLP promoter. Also, phosphorylation of TFIIF increases the formation of transcripts, where as phosphorylation of RNA polymerase II dramatically inhibits transcript formation. Furthermore, we demonstrate that CK2β directly interacts with RNA polymerase II, TFIIA, TFIIF, and TBP. These results strongly suggest that CK2 may play a role in regulating transcription of protein coding genes. © 2004 Wiley‐Liss, Inc.