Non-contiguous regions of Z-DNA in a DNA dodecamer.
AUTOR(ES)
Hua, N
RESUMO
The conformation of the self-complimentary DNA dodecamer d(br5CGbr5CGAATTbr5CGbr5CG) has been investigated in a variety of salt and solvent conditions by one and two-dimensional 1H NMR. In low salt aqueous solutions, the molecule forms a regular B-DNA structure similar to the unmodified dodecamer. However, in aqueous solution containing high salt concentration and methanol, the dodecamer adopts a structure in which the br5CGbr5CG ends of the molecule are in a Z-DNA like conformation and the AATT region is neither standard B-DNA nor Z-DNA. The implications of these results for the structure of junctions between B and Z-DNA and the sequence specificity of Z-DNA are discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=334897Documentos Relacionados
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