Crystal structure of a naturally occurring dinucleoside phosphate: Uridylyl 3′,5′-adenosine phosphate model for RNA chain folding
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ID: 272730
1972
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Abstract
The crystal structure of uridylyl 3′,5′-adenosine phosphate (UpA) has been determined and refined to an R value of 0.062. There are two UpA molecules per asymmetric unit in a monoclinic unit cell with dimensions a = 16.91, b = 12.37, c = 11.25 Å and β = 96.0 °. The conformation of the phosphodiester linkage is different for the two molecules; one UpA suggests a model for a sharp turn in a single-stranded nucleic acid structure and the other for a helical structure. All the nucleoside units have similar conformations. There is no complementary base pairing between the adenines and uracils but rather layers of base-paired adenines and base-paired uracils separated by 3.4 Å. The predominant form of base stacking involves the ribosyl oxygen atom and the bases.
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berman1972journalcrystal
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| Authors | Joel L. Sussman,Nadrian C. Seeman,S.-H. Kim,Helen M. Berman;Joel L. Sussman;Nadrian C. Seeman;S.-H. Kim;Helen M. Berman; |
| Journal | Journal of molecular biology |
| Year | 1972 |
| DOI |
10.1016/0022-2836(72)90423-8
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