Suzuki T, Ogishi A, Shinohara T, Suito S. Formation of 8-S-L-Cysteinyladenosine from 8-Bromoadenosine and Cysteine.
Chem Pharm Bull (Tokyo) 2018;
66:184-187. [PMID:
29386470 DOI:
10.1248/cpb.c17-00731]
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Abstract
When 8-bromoadenosine was incubated with cysteine at pH 7.2 and 37°C, an exclusive product was generated. This product was identified as a cysteine substitution derivative of adenosine at the 8 position, 8-S-L-cysteinyladenosine. The reaction accelerated as pH increased from mildly acidic to basic conditions. The isolated cysteine adduct of adenosine decreased with a half-life of 15 h at pH 7.2 and 37°C. Similar results were obtained for the incubation of 8-bromo-2'-deoxyadenosine and 8-bromoadenosine 3',5'-cyclic monophosphate with cysteine. These results suggest that 8-bromoadenine in nucleotides, RNA, and DNA can react with thiols, resulting in adducts under physiological conditions.
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