Open AccessRNA polymerase II transcription termination is mediated specifically by protein binding to a CCAAT box sequence.
Author(s) -
Sheila Connelly,
James L. Manley
Publication year - 1989
Publication title -
molecular and cellular biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.14
H-Index - 327
eISSN - 1067-8824
pISSN - 0270-7306
DOI - 10.1128/mcb.9.11.5254
Subject(s) - caat box , biology , transcription (linguistics) , microbiology and biotechnology , binding site , ccaat enhancer binding proteins , transcription factor ii d , rna polymerase ii , rna polymerase , transcription factor , consensus sequence , promoter , dna binding protein , gene , rna , gene expression , genetics , peptide sequence , linguistics , philosophy
A region in the adenovirus major late promoter (MLP) containing a CCAAT consensus sequence can direct transcription termination of RNA polymerase II, a mechanism that possibly prevents transcriptional interference from upstream genes. Using a chimeric plasmid template that contains the MLP directing expression of the simian virus 40 early region, we showed that an inserted oligonucleotide containing only 13 base pairs of MLP sequences, including the CCAAT box, is capable of inducing transcription termination in an orientation-dependent, position-independent manner. Point mutations within the CCAAT-specific protein-binding site abolished this effect, while a base substitution outside of this region did not affect termination. These data suggest that termination is mediated by a CCAAT box-binding protein. Several other transcription factor-binding sites do not, however, cause termination, suggesting that this may be a relatively specific property of a CCAAT-binding protein.