Crystal structure at 1.5-A resolution of d(CGCICICG), an octanucleotide containing inosine, and its comparison with d(CGCG) and d(CGCGCG) structures.Kumar, V.D., Harrison, R.W., Andrews, L.C., Weber, I.T.
(1992) Biochemistry 31: 1541-1550
- PubMed: 1737011
- PubMed Abstract:
- The Molecular Structure of the Left-Handed Z-DNA Double Helix at 1.0 Angstrom Atomic Resolution. Geometry, Conformation, and Ionic Interaction of d(CGCGCG)
Gessner, R.V.,Frederick, C.A.,Quigley, G.J.,Rich, A.,Wang, A.H.-J.
(1989) J.Biol.Chem. 264: 7921
- The Octamers d(CGCGCGCG) and d(CGCATGCG) Both Crystallize as Z-DNA in the Same Hexagonal Lattice
Fujii, S.,Wang, A.H.-J.,Quigley, G.J.,Westerink, H.,Van Der Marel, G.,Van Boom, J.H.,Rich, A.
(1985) Biopolymers 24: 243
- High-Salt d(CpGpCpG), a Left-Handed Z'DNA Double Helix
Drew, H.,Takano, T.,Tanaka, S.,Itakura, K.,Dickerson, R.
(1980) Nature 286: 567
- The Tetramer d(CpGpCpG) Crystallizes as a Left-Handed Double Helix
Crawford, J.L.,Kolpak, F.J.,Wang, A.H.-J.,Quigley, G.J.,Van Boom, J.H.,Van Der Marel, G.,Rich, A.
(1980) Proc.Natl.Acad.Sci.USA 77: 4016
The octadeoxyribonucleotide d(CGCICICG) has been crystallized in space group P(6)5(22) with unit cell dimensions of a = b = 31.0 A and c = 43.7 A, and X-ray diffraction data have been collected to 1.5-A resolution. Precession photographs and the self ...
The octadeoxyribonucleotide d(CGCICICG) has been crystallized in space group P(6)5(22) with unit cell dimensions of a = b = 31.0 A and c = 43.7 A, and X-ray diffraction data have been collected to 1.5-A resolution. Precession photographs and the self-Patterson function indicate that 12 base pairs of Z-conformation DNA stack along the c-axis, and the double helices pack in a hexagonal array similar to that seen in other crystals of Z-DNA. The structure has been solved by both Patterson deconvolution and molecular replacement methods and refined in space group P(6)5 to an R factor of 0.225 using 2503 unique reflections greater than 3.0 sigma (F). Comparison of the molecules within the hexagonal lattice with highly refined crystal structures of other Z-DNA reveals only minor conformational differences, most notably in the pucker of the deoxyribose of the purine residues. The DNA has multiple occupancy of C:I and C:G base pairs, and C:I base pairs adopt a conformation similar to that of C:G base pairs.
National Cancer Institute, Frederick Cancer Research and Development Center, Maryland 21702-1201.