Exocyclic Deoxyadenosine Adducts of 1,2,3,4-Diepoxybutane: Synthesis, Structural Elucidation, and Mechanistic Studies
作者:Uthpala Seneviratne、Sergey Antsypovich、Melissa Goggin、Danae Quirk Dorr、Rebecca Guza、Adam Moser、Carrie Thompson、Darrin M. York、Natalia Tretyakova
DOI:10.1021/tx900312e
日期:2010.1.18
guanine within DNA, DEB induces a large number of A → T transversions, suggesting that it forms strongly mispairing lesions at adenine nucleobases. We now report the discovery of three potentially mispairing exocyclic adenine lesions of DEB: N6,N6-(2,3-dihydroxybutan-1,4-diyl)-2′-deoxyadenosine (compound 2), 1,N6-(2-hydroxy-3-hydroxymethylpropan-1,3-diyl)-2′-deoxyadenosine (compound 3), and 1,N6-(1
1,2,3,4-二环氧丁烷 (DEB) 被认为是 1,3-丁二烯的最终致癌代谢物,1,3-丁二烯是城市空气中存在的一种重要的工业化学品和环境污染物。虽然它优先修饰 DNA 中的鸟嘌呤,但 DEB 会诱导大量 A → T 颠换,表明它在腺嘌呤核碱基处形成强烈的错配损伤。我们现在报告了 DEB 的三个潜在错配环外腺嘌呤病变的发现:N 6 , N 6 -(2,3-dihydroxybutan-1,4-diyl)-2'-deoxyadenosine (compound 2 ), 1, N 6 -( 2-hydroxy-3-hydroxymethylpropan-1,3-diyl)-2'-deoxyadenosine (compound 3 ), and 1, N 6-(1-羟甲基-2-羟基丙烷-1,3-二基)-2'-脱氧腺苷(化合物4 )。新型 DEB-dA 加合物的结构和立体化学由紫外和核磁共振