| Literature DB >> 15250722 |
Jeyaprakashnarayanan Seenisamy1, Evonne M Rezler, Tiffanie J Powell, Denise Tye, Vijay Gokhale, Chandana Sharma Joshi, Adam Siddiqui-Jain, Laurence H Hurley.
Abstract
The nuclease hypersensitivity element III1 (NHE III1) upstream of the P1 and P2 promoters of c-MYC controls 80-90% of the transcriptional activity of this gene. The purine-rich strand in this region can form a G-quadruplex structure that is a critical part of the silencer element for this promoter. We have demonstrated that this G-quadruplex structure can form a mixture of four biologically relevant parallel-loop isomers, which upon interaction with the cationic porphyrin TMPyP4 are converted to mixed parallel/antiparallel G-quadruplex structures.Entities:
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Year: 2004 PMID: 15250722 DOI: 10.1021/ja040022b
Source DB: PubMed Journal: J Am Chem Soc ISSN: 0002-7863 Impact factor: 15.419