Structure of the d(CGCCCGCGGGCG) dodecamer: a kinked A-DNA molecule showing some B-DNA features.
Malinina, L., Fernandez, L.G., Huynh-Dinh, T., Subirana, J.A.(1999) J Mol Biol 285: 1679-1690
- PubMed: 9917405 
- DOI: https://doi.org/10.1006/jmbi.1998.2424
- Primary Citation of Related Structures:  
399D - PubMed Abstract: 
We have determined the structure of the dodecamer duplex d(CGCCCGCGGGCG)2. A careful use of the molecular replacement programme AMoRe has been essential in order to solve the structure. This dodecamer shows a unique conformation, quite different from all the previously studied oligonucleotide duplexes: the central octamer has an A conformation, but with a sharp 65 degrees kink in the centre; the terminal base-steps have a B-like conformation; the major groove is completely closed in the centre, a hollow molecule is thus found. The results obtained confirm the high degree of variability of DNA structure. A new type of kink and an intermediate A/B double-helical conformation have been found. Such intermediate conformation differs from those described in DNA polymerase complexes.
Organizational Affiliation: 
Departament d'Enginyeria Química, E.T.S.E.I.B., Av. Diagonal 647, Barcelona, 08028, Spain.