Related Experiment Video
Updated: Aug 10, 2026

Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp1
Published on: May 27, 2016
Identification of a novel promoter in the replication control region of plasmid R6K
P Mukerji1, A Greener, M Filutowicz
1Department of Bacteriology, University of Wisconsin, Madison 53706.
Abstract:
A novel source of transcription has been detected in the replication region of plasmid R6K by using fusions involving the galK reporter gene. The -35 and -10 consensus RNA polymerase binding sites were identified in the region overlapping the binding sites for the R6K-encoded replication protein pi. Transcription from this promoter, designated P2, is repressed in vivo by pi-protein levels that are inhibitory for replication. Promoter-down mutations in P2 induced in vitro by bisulfite mutagenesis result in a reduced copy number of a beta-replicon but not of a gamma-replicon. Implications of the role of P2 in R6K replication are discussed.
Related Concept Videos
Conservative Site-specific Recombination and Phase Variation
The recognition sites for Cre recombinase called LoxP...
The Eukaryotic Promoter Region
Reporter Genes
Commonly used reporter...
Bacterial Transcription
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
Transcription Initiation
The promoters and enhancers and their accessory proteins allow tight regulation of...

