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  • Title: Crystallization and preliminary crystallographic study of triple-helical DNA.
    Author: Han ZJ, Rhee S, Liu K, Miles HT, Davies DR.
    Journal: Acta Crystallogr D Biol Crystallogr; 2000 Jan; 56(Pt 1):104-5. PubMed ID: 10666643.
    Abstract:
    Single crystals of d(CTCCT(S)CCGCGCG).d(CGCGCGGAG) have been grown by the vapor-diffusion method using 2-methyl-2,4-pentanediol as a precipitant. The crystals are tetragonal, space group P4(2), with unit-cell parameters a = b = 53.8, c = 43.1 A, and diffract to 1.8 A resolution at a synchrotron X-ray beamline. In the crystal, the asymmetric unit contains one copy of the construct. The two halves of the structure are related by non-crystallographic twofold symmetry. These observations are consistent with the conclusion that the sequences of the 12-mer and 9-mer oligonucleotides form a duplex DNA at one end and a triplex DNA at the other end.
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