1d59

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(New page: 200px<br /><applet load="1d59" size="450" color="white" frame="true" align="right" spinBox="true" caption="1d59, resolution 2.300&Aring;" /> '''CRYSTAL STRUCTURE O...)
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Revision as of 00:24, 25 November 2007

Image:1d59.gif

1d59, resolution 2.300Å

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CRYSTAL STRUCTURE OF 4-STRANDED OXYTRICHA TELOMERIC DNA

Overview

The sequence d(GGGGTTTTGGGG) from the 3' overhang of the Oxytricha, telomere has been crystallized and its three-dimensional structure solved, to 2.5 A resolution. The oligonucleotide forms hairpins, two of which join, to make a four-stranded helical structure with the loops containing four, thymine residues at either end. The guanine residues are held together by, cyclic hydrogen bonding and an ion is located in the centre. The four, guanine residues in each segment have a glycosyl conformation that, alternates between anti and syn. There are two four-stranded molecules in, the asymmetric unit showing that the structure has some intrinsic, flexibility.

About this Structure

1D59 is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.

Reference

Crystal structure of four-stranded Oxytricha telomeric DNA., Kang C, Zhang X, Ratliff R, Moyzis R, Rich A, Nature. 1992 Mar 12;356(6365):126-31. PMID:1545863

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