Synthesis of Oligonucleotide Derivatives with Aryl(trifluoromethyl)diazirine Moiety for the Photoaffinity Modification of Proteins and Nucleic Acids |
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Authors: | Agapkina Yu Yu Agapkin D V Zagorodnikov A V Alekseev Ya I Korshunova G A Gottikh M B |
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Institution: | (1) Russian Academy of Sciences, Institute of Chemical Physics Problems, Institutskii pr. 14, Chernogolovka, Moscow oblast, 142432, Russia;(2) Chemical Faculty and Belozerskii Institute of Physicochemical Biology, Moscow State University, Moscow, 119899, Russia;(3) Syntol ZAO, Timiryazevskaya ul. 42, Moscow, 127550, Russia |
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Abstract: | 1-(4-(3-(Trifluoromethyl)-3H-diazirin-3-yl)benzamido)-3-O-(4,4"-dimethoxytrityl)-2,3-propanediol phosphoramidite was synthesized and used as a modified unit in the automatic synthesis of oligodeoxyribonucleotides. Pentadecathymidylates with various numbers of 2,3-propanediol moieties substituted with aryl(trifluoromethyl)diazirinyl (ATFMD) were obtained, and the thermal stability of their duplexes with (dA)15 were studied. One ATFMD-propanediol residue was shown to reduce the thermal stability of the duplex by 8–9°C. The irradiation of the ATFMD-containing duplexes by UV light with the wavelength of 350 nm was found to cause the cross-linking reaction of the ATFMD-containing strand with the complementary strand and the formation of the cross-linked duplexes. The photomodification efficiency was independent of the oligonucleotide sequence, with each ATFMD group providing for 5% cross-linking. The irradiation of an ATFMD-containing duplex, a substrate of the HIV-1 integrase, in the presence of this enzyme resulted in the covalent DNA–protein complex. The oligonucleotides with the 1-(4-(3-(trifluoromethyl)-3H-diazirin-3-yl)benzamido)-2,3-propanediol moiety in their chains can be used for the photoaffinity modification of both nucleic acids and proteins that recognize them. |
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Keywords: | aryl(trifluoromethyl)diazirine integrase oligonucleotides photoaffinity modification |
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