Related Experiment Video
Updated: Aug 29, 2026

Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp1
Published on: May 27, 2016
Kalirin expression is regulated by multiple promoters
Clifton E McPherson1, Betty A Eipper, Richard E Mains
1Department of Neuroscience, University of Connecticut Health Center, Farmington, CT 06030, USA.
Abstract:
Kalirin is a multidomain guanine nucleotide exchange factor for small GTPbinding proteins of the Rho family. It is expressed in multiple isoforms that contain different combinations of functional domains and display a complex pattern of expression during brain development. In addition to the isoforms generated through alternative splicing, we have identified multiple transcriptional start sites in rats and humans. These multiple transcriptional start sites result in full-length Kalirin transcripts possessing different 5' ends encoding proteins with differing amino termini. These alternative first exons display different patterns of expression in developing rats and humans and in cultured cells. Most of these alternate first exons lie >100 kb upstream of exon 2 in both rats and humans. Comparisons of the rat and human Kalirin promoter regions reveal numerous shared potential regulatory elements.
Related Concept Videos
Regulation of Expression Occurs at Multiple Steps
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Regulation of Expression Occurs at Multiple Steps
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
The Eukaryotic Promoter Region
Regulation of Expression at Multiple Steps
RNA Polymerase II Accessory Proteins
Bacterial RNA Polymerase
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...

