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UV-Induced Proton Transfer between DNA Strands (122 visite) (PDF privato 108 visite)

Zhang Y, de La Harpe K, Beckstead AA, Improta R, Kohler B

J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2015 Jun 10; 137(22): 7059-7062.

Tipo di articolo: Journal Article, Research Support, Non-U. S. Gov'T, Non-P. H. S., , Impact factor: 13.038, Impact factor a 5 anni: 12.376, Url: http://www.scopus.com/inward/record.url?eid=2-s2.0-84935863950&partnerID=40&md5=e5ec12d4c827729bc7c5d5879ddcd610

Parole chiave: Excited States, Free Radical Reactions, Proton Transfer, Quantum Theory, Vibrations (mechanical), Charge Recombinations, Electron Transfer, Mutagenic Tautomers, Photo-Induced, Picosecond Time Scale, Quantum-Mechanical Calculation, Radical Anions, Single-Stranded Dna, Double Stranded Dna, Acid Dissociation Constant, Article, Base Pairing, Dna Helix, Dna Strand, Electron Transport, Nucleotide Sequence, Proton Transport, Quantum Mechanics, Spectroscopy, Ultraviolet Radiation,

Affiliazioni: *** IBB - CNR ***
Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT, United States
Department of Physics, United States Air Force Academy, USAF AcademyCO, United States
Consiglio Nationale Delle Ricerche, Istituto di Biostrutture e Bioimmagini, Via Mezzocannone 16, Naples, Italy
daggerDepartment of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States., double daggerDepartment of Physics, United States Air Force Academy, USAF Academy, Colorado 80840, United States., section signConsiglio Nationale delle Ricerche, Istituto di Biostrutture e Bioimmagini, Via Mezzocannone 16, 80136 Naples, Italy.,


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UV radiation creates excited states in DNA that lead to mutagenic photoproducts. Photoexcitation of single-stranded DNA can transfer an electron between stacked bases, but the fate of excited states in the double helix has been intensely debated. Here, photoinduced interstrand proton transfer (PT) triggered by intrastrand electron transfer (ET) is detected for the first time by time-resolved vibrational spectroscopy and quantum mechanical calculations. Long-lived excited states are shown to be oppositely charged base pair radical ions. In two of the duplexes, the base pair radical anions are present as tautomers formed by interstrand PT. Charge recombination occurs on the picosecond time scale preventing the accumulation of damaging radicals or mutagenic tautomers. © 2015 American Chemical Society.
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UV-Induced Proton Transfer between DNA Strands (accesso riservato) (108 visite)

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Martinez-fernandez L, Zhang Y, De La Harpe K, Beckstead AA, Kohler B, Improta R
* Photoinduced long-lived charge transfer excited states in AT-DNA strands (54 visite)
Phys Chem Chem Phys (ISSN: 1463-9084electronic, 1463-9076linking), 2016 Aug 21; 18(31): 21241-21245.
Impact Factor: 4.123
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Improta R, Barone V
* Excited States behavior of nucleobases in solution: insights from computational studies (96 visite)
Topics In Current Chemistry (ISSN: 0340-1022), 2015; 355: 329-357.
Impact Factor: 4.014
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Santoro F, Improta R, Fahleson T, Kauczor J, Norman P, Coriani S
* Relative stability of the La and Lb excited states in adenine and guanine: Direct evidence from TD-DFT calculations of MCD spectra (101 visite)
J Phys Chem Lett (ISSN: 1948-7185, 1948-7185electronic), 2014 Jun 5; 5(11): 1806-1811.
Impact Factor: 7.458
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Banyasz A, Douki T, Improta R, Gustavsson T, Onidas D, Vaya I, Perron M, Markovitsi D
* Electronic excited states responsible for dimer formation upon UV absorption directly by thymine strands: Joint experimental and theoretical study (124 visite)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2012 Sep 12; 134(36): 14834-14845.
Impact Factor: 10.677
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Hua Y, Changenet-Barret P, Improta R, Vaya I, Gustavsson T, Kotlyar AB, Zikich D, Sket P, Plavec J, Markovitsi D
* Cation effect on the electronic excited states of guanine nanostructures studied by time-resolved fluorescence spectroscopy (130 visite)
J Phys Chem C (ISSN: 1932-7447), 2012 Jul 12; 116(27): 14682-14689.
Impact Factor: 4.814
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Biemann L, Kovalenko SA, Kleinermanns K, Mahrwald R, Markert M, Improta R
* Excited state proton transfer is not involved in the ultrafast deactivation of Guanine-cytosine pair in solution (83 visite)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2011 Dec 14; 133(49): 19664-19667.
Impact Factor: 9.907
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Picconi D, Barone V, Lami A, Santoro F, Improta R
* The Interplay between ππ*/nπ* excited states in gas-phase thymine: A quantum dynamical study (79 visite)
Chemphyschem (ISSN: 1439-4235, 1439-7641, 1439-7641electronic), 2011 Jul 11; 12(10): 1957-1968.
Impact Factor: 3.412
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Improta R, Santoro F, Barone V, Lami A
* Vibronic model for the quantum dynamical study of the competition between bright and charge-transfer excited states in single-strand polynucleotides: the adenine dimer case (85 visite)
J Phys Chem A (ISSN: 1089-5639, 1520-5215electronic, 1089-5639linking), 2009 Dec 31; 113(52): 15346-15354.
Impact Factor: 2.899
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Improta R, Barone V
* PCM/TD-DFT study of the two lowest excited states of uracil derivatives in solution: The effect of the functional and of the cavity model (96 visite)
J Mol Struct Theochem (ISSN: 0166-1280), 2009 Nov 30; 914(1-3): 87-93.
Impact Factor: 1.216
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Santoro F, Barone V, Improta R
* The Excited States Decay Of The A-T Dna: A Pcm/Td-Dft Study In Aqueous Solution Of The (9-Methyl-Adenine) 2 (1-Methyl-Thymine) 2 Stacked Tetramer (87 visite)
J Am Chem Soc (ISSN: 0002-7863, 0002-2786, 1520-5126), 2009; 131(42): 15232-15245.
Impact Factor: 8.58
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Improta R, Barone V
* The excited states of adenine and thymine nucleoside and nucleotide in aqueous solution: A comparative study by time-dependent DFT calculations (94 visite)
Theor Chem Acc (ISSN: 1432-881x), 2008 Jul; 120(4-6): 491-497.
Impact Factor: 2.37
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Santoro F, Barone V, Improta R
* Can TD-DFT calculations accurately describe the excited states behavior of stacked nucleobases? The cytosine dimer as a test case (101 visite)
J Comput Chem (ISSN: 0192-8651, 1096-987xelectronic, 0192-8651linking), 2008 Apr 30; 29(6): 957-964.
Impact Factor: 3.39
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Improta R
The Excited States Of Pi-Stacked 9-Methyl Adenine Oligomers: A Td-Dft Study In Aqueous Solution (82 visite)
Physical Chemistry Chemical Physics, 2008; 10: 2656-2664.
Impact Factor: 2.028
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13 Records (13 escludendo Abstract e Conferenze).
Impact factor totale: 64.888 (64.888 escludendo Abstract e Conferenze).
Impact factor a 5 anni totale: 67.827 (67.827 escludendo Abstract e Conferenze).







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