Triplex staples: DNA double-strand cross-linking at internal and terminal sites using psoralen-containing triplex-forming oligonucleotides


Li, Hong, Broughton-Head, Victoria J., Peng, Guomei, Powers, Vicki E.C., Ovens, Matthew J., Fox, Keith R.. and Brown, Tom (2006) Triplex staples: DNA double-strand cross-linking at internal and terminal sites using psoralen-containing triplex-forming oligonucleotides. Bioconjugate Chemistry, 17, (6), 1561-1567. (doi:10.1021/bc0601875).

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Original Publication URL: http://dx.doi.org/10.1021/bc0601875

Description/Abstract

A method has been developed to attach 4'-(hydroxymethyl)-4,5',8-trimethylpsoralen to the 5 position of thymine bases during solid-phase oligonucleotide synthesis. UV irradiation of triplex-forming oligonucleotides (TFOs) containing internally attached psoralens produces photoadducts at TpA steps within target duplexes, thus relaxing the constraints on selection of psoralen target sequences. Photoreaction of TFOs containing two psoralens, located at the 5'- and 3'-ends, has been used to create double-strand cross-links (triplex staples) at both termini of the TFO. Such complexes have no free single-stranded ends. TFOs containing 4'-(hydroxymethyl)-4,5',8-trimethyl-psoralen, 3-methyl-2-aminopyridine, and 5-(3-aminoprop-2-ynyl)deoxyuridine formed photoadducts with target duplexes under near-physiological conditions.

Item Type: Article
ISSNs: 1043-1802 (print)
Related URLs:
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
Divisions: University Structure - Pre August 2011 > School of Biological Sciences
University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 56677
Date Deposited: 07 Aug 2008
Last Modified: 27 Mar 2014 18:39
URI: http://eprints.soton.ac.uk/id/eprint/56677

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