A HIGHLY PROPELLER-TWISTED ADENINE-ADENINE BASE PAIR IN 8-TERT-BUTYLADENINE

被引：6

作者：

ALEXANDRESCU, A ^{[1
]}

DRENDEL, WB ^{[1
]}

SUNDARALINGAM, M ^{[1
]}

机构：

[1] UNIV WISCONSIN,COLL AGR & LIFE SCI,DEPT BIOCHEM,MADISON,WI 53706

来源：

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS | 1991年 / 47卷

关键词：

D O I：

10.1107/S0108270190008824

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

C9H13N5, M(r) = 191.24, monoclinic, P2(1)/c, a = 7.562 (1), b = 6.825 (1), c = 20.905 (1) angstrom, beta = 104.84 (1)degrees, V = 1042.9 angstrom 3, Z = 4, room temperature, D(x) = 1.218 g cm-3, lambda(Cu K-alpha) = 1.5418 angstrom, mu = 6.6 cm-1, F(000) = 408. The structure was solved by the multisolution technique and refined by the block-diagonal least-squares method to a final R index of 0.045 using 1970 intensities. The adenine bases form three pairs of hydrogen bonds to symmetry-related molecules in the crystal lattice. Two distinct modes of hydrogen bonding are observed. One mode involves a planar interaction between adjacent adenine bases while the second mode is characterized by an unusually high propeller twist angle of 79.3-degrees between the planes through the two participating adenine bases.

引用

页码：1041 / 1044

页数：4

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