Abstract:
:Crystals of the self-complementary decadeoxyoligonucleotide d(CpGpTpApCpGpTpApCpG) have been grown from a solution containing [Co(NH3)6]Cl3 and spermine. The amber-colored crystals are hexagonal and belong to the space group P6(5) (or P6(1] with unit cell parameters a = 17.93 A, c = 43.41 A. Precession photography and molecular packing considerations indicate that the unit cell consists of a 12 nucleotide duplex. The asymmetric unit, therefore, is a disordered duplex dimer in which each pyrimidine-purine base-pair is occupied 60% of the time by a C . G pair and 40% of the time by a T . A pair. The above considerations and preliminary structure analysis reveal that this alternating pyrimidine-purine oligomer assumes a Z-DNA conformation.
journal_name
J Mol Bioljournal_title
Journal of molecular biologyauthors
Brennan RG,Sundaralingam Mdoi
10.1016/0022-2836(85)90429-2subject
Has Abstractpub_date
1985-02-20 00:00:00pages
561-3issue
4eissn
0022-2836issn
1089-8638pii
0022-2836(85)90429-2journal_volume
181pub_type
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