首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structure of a nucleoside model for the inter­strand cross-link formed by the reaction of 2′-de­oxy­guanosine and an abasic site in duplex DNA
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Crystal structure of a nucleoside model for the inter­strand cross-link formed by the reaction of 2′-de­oxy­guanosine and an abasic site in duplex DNA

机译:2'-脱氧鸟苷与双链DNA中的脱碱基位点反应形成链间交联的核苷模型的晶体结构

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摘要

The title compound, 9-[(2R,4S,5R)-4-hy­droxy-5-(hy­droxy­meth­yl)tetra­hydro­furan-2-yl]-2-{[(2R,4S,5R)-4-meth­oxy-5-(meth­oxy­meth­yl)tetra­hydro­furan-2-yl]amino}-1H-purin-6(9H)-one, C17H25N5O7, crystallizes with two independent mol­ecules (A and B) in the asymmetric unit. In the crystal, the guanosine moieties of mol­ecules A and B are linked by N—H⋯N and O—H⋯N hydrogen-bonding inter­actions, forming ribbons which are stacked to form columns along [100]. These columns are then linked by O—H⋯O hydrogen bonds between the ribose moieties and numerous C—H⋯O inter­actions to complete the three-dimensional structure.
机译:标题化合物9-[((2R,4S,5R)-4-羟基-5-(羟甲基)四氢呋喃-2-基] -2-{[((2R,4S,5R)-4-甲氧基-5-(甲氧基甲基)四氢呋喃-2-基氨基} -1H-嘌呤-6(9H)-1,C17H25N5O7,在不对称单元中与两个独立的分子(A和B)结晶。在晶体中,分子A和B的鸟嘌呤部分通过N-H andN和O-H hydrogenN氢键相互作用连接,形成带状结构,这些带状结构沿[100]堆积成列。然后,这些柱通过核糖部分之间的OH H⋯O氢键和大量CHOH相互作用进行连接,以完成三维结构。

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