Karthik S, Mandal PK, Thirugnanasambandam A, Gautham N. Crystal structures of disordered Z-type helices.
Nucleosides Nucleotides Nucleic Acids 2018;
38:279-293. [PMID:
30588873 DOI:
10.1080/15257770.2018.1517883]
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Abstract
The X-ray crystal structures of a decamer sequence d(CGCGTACGCG)2 and a tetradecamer sequence d(CGCGCGTACGCGCG)2 are presented here. Both sequences are alternating pyrimidine-purine repeat sequences and they form disordered, pseudo-continuous left handed Z-type helices. They demonstrate interesting variants of the 'bundles of columns of helices' mode of packing.
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