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.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4089521 | PMC |
| http://dx.doi.org/10.1107/S2053230X1401084X | DOI Listing |
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