Oxidation of Adenosine and Inosine: The Chemistry of 8‑Oxo-7,8-dihydropurines, Purine Iminoquinones, and Purine Quinones as Observed by Ultrafast Spectroscopy
Oxidative damage to purine nucleic acid bases proceeds through quinoidal intermediates derived from their corresponding 8-oxo-7,8-dihydropurine bases. Oxidation studies of 8-oxo-7,8-dihyroadenosine and 8-oxo-7,8-dihydroinosine indicate that these quinoidal species can produce stable cross-links with...
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| Veröffentlicht in: | Journal of the American Chemical Society 2013-03, Vol.135 (9), p.3423-3438 |
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| container_issue | 9 |
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| container_title | Journal of the American Chemical Society |
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| creator | Nilov, Denis I Komarov, Dmitry Y Panov, Maxim S Karabaeva, Kanykey E Mereshchenko, Andrey S Tarnovsky, Alexander N Wilson, R. Marshall |
| description | Oxidative damage to purine nucleic acid bases proceeds through quinoidal intermediates derived from their corresponding 8-oxo-7,8-dihydropurine bases. Oxidation studies of 8-oxo-7,8-dihyroadenosine and 8-oxo-7,8-dihydroinosine indicate that these quinoidal species can produce stable cross-links with a wide variety of nucleophiles in the 2-positions of the purines. An azide precursor for the adenosine iminoquinone has been synthesized and applied in ultrafast transient absorption spectroscopic studies. Thus, the adenosine iminoquinone can be observed directly, and its susceptibility to nucleophilic attack with various nucleophiles as well as the stability of the resulting cross-linked species have been evaluated. Finally, these observations indicate that this azide might be a very useful photoaffinity labeling agent, because the reactive intermediate, adenosine iminoquinone, is such a good mimic for the universal purine base adenosine. |
| doi_str_mv | 10.1021/ja3068148 |
| format | Article |
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Thus, the adenosine iminoquinone can be observed directly, and its susceptibility to nucleophilic attack with various nucleophiles as well as the stability of the resulting cross-linked species have been evaluated. Finally, these observations indicate that this azide might be a very useful photoaffinity labeling agent, because the reactive intermediate, adenosine iminoquinone, is such a good mimic for the universal purine base adenosine.</description><subject>Adenosine - chemistry</subject><subject>Inosine - chemistry</subject><subject>Molecular Structure</subject><subject>Oxidation-Reduction</subject><subject>Purines - chemistry</subject><subject>Quinones - chemistry</subject><subject>Spectrum Analysis</subject><issn>0002-7863</issn><issn>1520-5126</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkctKxDAUhoMoOl4WvoBkIyhYzaVpU3fD4GVAGEVdlzQ5ZTrMNDVpxe58Bd_AZ_NJzDijKzfn-vFzDj9Ch5ScU8LoxUxxkkgayw00oIKRSFCWbKIBIYRFqUz4Dtr1fhbamEm6jXYY5zxLaTxAn5O3yqi2sjW2JR4aqK2vasCqNni8qi_x0xTwaAqLyreuX3Ly6_1j8maj9ExGppr2xtmmc4H1Z_j-p8DjRVXbly6En-lSb715WA-x8nhSeHCvYHDR4-d561SpfIsfG9Cts17bpt9HW6WaezhY5z30fH31NLqN7iY349HwLlJckDZKSiaVEECZIJCB1CYtmaCykEKkwoAQmiQx5cxkRglCSkWJTmlmhOK8YJrvoZOVbuPC2eDbPLyrYT5XNdjO55RTkXCR8TigpytUhxu9gzJvXLVQrs8pyZeG5H-GBPZoLdsVCzB_5K8DATheAUr7fGY7V4cv_xH6Bmk6k4k</recordid><startdate>20130306</startdate><enddate>20130306</enddate><creator>Nilov, Denis I</creator><creator>Komarov, Dmitry Y</creator><creator>Panov, Maxim S</creator><creator>Karabaeva, Kanykey E</creator><creator>Mereshchenko, Andrey S</creator><creator>Tarnovsky, Alexander N</creator><creator>Wilson, R. 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| subjects | Adenosine - chemistry Inosine - chemistry Molecular Structure Oxidation-Reduction Purines - chemistry Quinones - chemistry Spectrum Analysis |
| title | Oxidation of Adenosine and Inosine: The Chemistry of 8‑Oxo-7,8-dihydropurines, Purine Iminoquinones, and Purine Quinones as Observed by Ultrafast Spectroscopy |
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