122D

DNA HELIX STRUCTURE AND REFINEMENT ALGORITHM: COMPARISON OF MODELS FOR D(CCAGGCM==5==CTGG) DERIVED FROM NUCLSQ, TNT, AND X-PLOR

122D の概要

• エントリーDOI: 10.2210/pdb122d/pdb
• 分子名称: DNA (5'-D(*CP*CP*AP*GP*GP*CP*(5CM)P*TP*GP*G)-3') (2 entities in total)
• 機能のキーワード: b-dna, double helix, modified, dna
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 6120.04

構造登録者

Hahn, M.,Heinemann, U. (登録日: 1993-05-03, 公開日: 1993-10-15, 最終更新日: 2024-02-07)

主引用文献

Hahn, M.,Heinemann, U.
DNA helix structure and refinement algorithm: comparison of models for d(CCAGGCm5CTGG) derived from NUCLSQ, TNT and X-PLOR.
Acta Crystallogr.,Sect.D, 49:468-477, 1993

PubMed Abstract: In an earlier study [Heinemann & Hahn (1992). J. Biol. Chem. 267, 7332-7341], the crystal structure of the double-stranded B-DNA decamer d(CCAGGCm(5)CTGG) was refined with NUCLSQ to R = 17.4% against 3799 2sigma structure amplitudes in the resolution range 8-1.7 A. This structure has now been re-refined against the same diffraction data using either TNT or X-PLOR in order to determine to what extent the resulting DNA conformations would differ and to examine the suitability of these programs for the refinement of oligonucleotide structures. The R value from the NUCLSQ refinement could not be reached with either TNT or X-PLOR, although both programs yield reasonably refined DNA models showing root-mean-square deviations against the NUCLSQ model of the decamer duplex of 0.25 and 0.32 A, respectively. Some derived local structure parameters differ depending on the refinement procedure used. This holds true for several exocyclic torsion angles of the sugar-phosphate backbone, whereas sugar puckers as well as helical and base-pair stacking parameters are only weakly influenced. A subset of 15 solvent sites with low temperature factors is conserved in all three models.

PubMed: 15299506
DOI: 10.1107/S0907444993004858

実験手法

X-RAY DIFFRACTION (1.7 Å)