Modulation of promoter occupancy by cooperative DNA binding and activation-domain function is a major determinant of transcriptional regulation by activators in vivo

Tanaka, M. (April 1996) Modulation of promoter occupancy by cooperative DNA binding and activation-domain function is a major determinant of transcriptional regulation by activators in vivo. Proceedings of the National Academy of Sciences of the United States of America, 93 (9). pp. 4311-5. ISSN 0027-8424

URL: http://www.ncbi.nlm.nih.gov/pubmed/8633061

Abstract

Binding of transcriptional activators to a promoter is a prerequisite process in transcriptional activation. It is well established that the efficiency of activator binding to a promoter is determined by the affinity of direct interactions between the DNA-binding domain of an activator and its specific target sequences. However, I describe here that activator binding to a promoter is augmented in vivo by the effects of two other determinants that have not been generally appreciated: (i) the number of activator binding sites present in a promoter and (ii) the potency of activation domains of activators. Multiple sites within a promoter can cooperatively recruit cognate factors regardless of whether they contain an effective activation domain. This cooperativity can result in the synergistic activation of transcription. The second effect is the enhancement of activator binding to a promoter by the presence of activation domains. In this case, activation domains are not simply tethered to the promoter by the DNA-binding domain but instead assist the DNA-binding domain being tethered onto the promoter. This effect of activation domains on DNA binding is instrumental in determining how potent activators can induce steep transcriptional increases at low concentrations.

Item Type: Paper
Uncontrolled Keywords: Amino Acid Sequence Base Sequence Binding Sites Cytochrome c Group/ biosynthesis/genetics Cytochromes c DNA-Binding Proteins/ metabolism Escherichia coli/enzymology Fungal Proteins/biosynthesis Gene Expression Regulation Molecular Sequence Data Promoter Regions (Genetics) Recombinant Proteins/biosynthesis Research Support, U.S. Gov't, P.H.S. Saccharomyces cerevisiae Proteins Sulfuric Acid Esters/pharmacology Trans-Activators/ metabolism Transcription Factors Transcription, Genetic beta-Galactosidase/biosynthesis
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > transcription
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > DNA binding protein
organism description > bacteria > escherichia coli
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > genes, structure and function > gene expression
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > transcription factor
CSHL Authors:
Communities: CSHL labs
Depositing User: Kathleen Darby
Date: 30 April 1996
Date Deposited: 13 May 2014 14:14
Last Modified: 13 May 2014 14:14
Related URLs:
URI: http://repository.cshl.edu/id/eprint/30114

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