| Literature DB >> 19997887 |
Abstract
Polypurine/polypyrimidine (pPu/pPy) tracts, which exist in the promoter regions of many growth-related genes, have been proposed to be very dynamic in their conformation. In this chapter, we describe a detailed protocol for DNase I and S1 nuclease footprinting experiments with supercoiled plasmid DNA containing the promoter regions to probe whether there are conformational transitions to B-type DNA, melted DNA, and G-quadruplex structures within this tract. This is demonstrated with the proximal promoter region of the human vascular endothelial growth factor (VEGF) gene, which also contains multiple binding sites for Sp1 and Egr-1 transcription factors.Entities:
Mesh:
Substances:
Year: 2010 PMID: 19997887 PMCID: PMC2807360 DOI: 10.1007/978-1-60327-418-0_14
Source DB: PubMed Journal: Methods Mol Biol ISSN: 1064-3745