4753-03-1Relevant articles and documents
2′-Alkynylnucleotides: A Sequence- and Spin Label-Flexible Strategy for EPR Spectroscopy in DNA
Haugland, Marius M.,El-Sagheer, Afaf H.,Porter, Rachel J.,Pe?a, Javier,Brown, Tom,Anderson, Edward A.,Lovett, Janet E.
supporting information, p. 9069 - 9072 (2016/08/05)
Electron paramagnetic resonance (EPR) spectroscopy is a powerful method to elucidate molecular structure through the measurement of distances between conformationally well-defined spin labels. Here we report a sequence-flexible approach to the synthesis of double spin-labeled DNA duplexes, where 2′-alkynylnucleosides are incorporated at terminal and internal positions on complementary strands. Post-DNA synthesis copper-catalyzed azide-alkyne cycloaddition (CuAAC) reactions with a variety of spin labels enable the use of double electron-electron resonance experiments to measure a number of distances on the duplex, affording a high level of detailed structural information.
Nucleic acid related compounds. 91. Biomimetic reactions are in harmony with loss of 2'-substituents as free radicals (not anions) during mechanism-based inactivation of ribonucleotide reductases. Differential interactions of azide, halogen, and alkylthio
Robins, Morris J.,Wnuk, Stanislaw F.,Hernández-Thirring, Amelia E.,Samano, Mirna C.
, p. 11341 - 11348 (2007/10/03)
The initial step in the mechanism-based inactivation of ribonucleotide reductases by 2'-chloro-2'deoxynucleotides is abstraction of H3' by a proximal free radical on the enzyme. The C3' radical is postulated to undergo spontaneous loss of chloride, and th