UV-Induced Adenine Radicals Induced in DNA A-Tracts: Spectral and Dynamical Characterization.
UV-Induced Adenine Radicals Induced in DNA A-Tracts: Spectral and Dynamical Characterization.
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DOI:
10.1021/acs.jpclett.6b01831
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发表时间:
2016-10-06
影响因子:
5.7
通讯作者:
Markovitsi, Dimitra
中科院分区:
文献类型:
--
作者:
Banyasz, Akos;Ketola, Tiia-Maaria;Munoz-Losa, Aurora;Rishi, Sunny;Adhikary, Amitava;Sevilla, Michael D.;Martinez-Fernandez, Lara;Improta, Roberto;Markovitsi, Dimitra
Adenyl radicals generated in DNA single and double strands, (dA)20 and (dA)20•(dT)20, by one- and two-photon ionization by 266 nm laser pulses decay at 600 nm with half-times of 1.0 ± 0.1 and 4 ± 1 ms, respectively. While ionization initially forms the cation radical, the radicals detected for (dA)20 are quantitatively identified as N6-deprotonated adenyl radicals by their absorption spectrum, which is computed quantum mechanically employing TD-DFT. Theoretical calculations show that deprotonation of the cation radical induces only weak spectral changes, in line with the spectra of the adenyl radical cation and the deprotonated radical trapped in low temperature glasses.
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影响因子:
15
作者:
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通讯作者:
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影响因子:
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