Structure of d(CCCCGGTACCGGGG)2 at 1.65 angstrom resolution.
Purushothaman, M., Varghese, A., Mandal, P.K., Gautham, N.(2014) Acta Crystallogr Sect F Struct Biol Cryst Commun 70: 860-865
- PubMed: 25005078 
- DOI: https://doi.org/10.1107/S2053230X1401084X
- Primary Citation of Related Structures:  
4OKL - PubMed Abstract: 
The crystal structure of the tetradecanucleotide d(CCCCGGTACCGGGG)2 has previously been reported as an A-type double helix at a resolution of 2.5 Å in space group P41. Here, the structure of this sequence was determined at a significantly higher resolution of 1.65 Å in space group P4₁2₁2. The differences in crystal packing between the former and latter are described. The crystallographic asymmetric unit consists of one tetradecanucleotide duplex that spans more than one full turn of the A-helix. This structure allowed the unambiguous identification of solvent interactions.
Organizational Affiliation: 
CAS in Crystallography and Biophysics, University of Madras, Guindy, Chennai, Tamil Nadu 600 025, India.