title: Low-temperature study of the A-DNA fragment d(GGGCGCCC).
abstract: The structure of the A-type duplex d(GGGCGCCC) was determined from data measured at 115 K to 2.0 A resolution. The space group, P4(3)2(1)2, is the same as for the 293 K structure; cell dimensions are a = 42.74 (4), c = 24.57 (1) A; R = 0.21 for 1694 observed reflections. The conformation and hydration are similar at the two temperatures. The average displacement parameters (B) for bases, sugars and phosphates all decrease by about 9 A2 relative to those found at 293 K. The individual values of B1/2 are linearly related to the distance from the molecular center of mass.
authors.affiliation: Department of Structural Chemistry, Weizmann Institute of Science, Rehovot, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Eisenstein
authors.forename: H
authors.initials: H
authors.lastname: Hope
authors.forename: T E
authors.initials: TE
authors.lastname: Haran
authors.forename: F
authors.initials: F
authors.lastname: Frolow
authors.forename: Z
authors.initials: Z
authors.lastname: Shakked
authors.forename: D
authors.initials: D
authors.lastname: Rabinovich
mesh_terms: D001483:Base Sequence; D004247:DNA; D005615:Freezing; D009690:Nucleic Acid Conformation; D009838:Oligodeoxyribonucleotides; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D009838:Oligodeoxyribonucleotides; D004247:DNA