296d: Difference between revisions

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New page: left|200px<br /><applet load="296d" size="350" color="white" frame="true" align="right" spinBox="true" caption="296d, resolution 2.250Å" /> '''SEQUENCE-DEPENDENT ...
 
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==Overview==
==Overview==
The bis-benzimidazole drug Hoechst 33258 has been co-crystallized with the, dodecanucleotide sequence d(CGCAAATTTGCG)2. The structure has been solved, by molecular replacement and refined to an R factor of 18.5% for 2125, reflections collected on a Xentronics area detector. The drug is bound in, the minor groove, at the five base-pair site 5'-ATTTG and is in a unique, orientation. This is displaced by one base pair in the 5' direction, compared to previously-determined structures of this drug with the, sequence d(CGCGAATTCGCG)2. Reasons for this difference in behaviour are, discussed in terms of several sequence-dependent structural features of, the DNA, with particular reference to differences in propeller twist and, minor-groove width.
The bis-benzimidazole drug Hoechst 33258 has been co-crystallized with the dodecanucleotide sequence d(CGCAAATTTGCG)2. The structure has been solved by molecular replacement and refined to an R factor of 18.5% for 2125 reflections collected on a Xentronics area detector. The drug is bound in the minor groove, at the five base-pair site 5'-ATTTG and is in a unique orientation. This is displaced by one base pair in the 5' direction compared to previously-determined structures of this drug with the sequence d(CGCGAATTCGCG)2. Reasons for this difference in behaviour are discussed in terms of several sequence-dependent structural features of the DNA, with particular reference to differences in propeller twist and minor-groove width.


==About this Structure==
==About this Structure==
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Sequence-dependent effects in drug-DNA interaction: the crystal structure of Hoechst 33258 bound to the d(CGCAAATTTGCG)2 duplex., Spink N, Brown DG, Skelly JV, Neidle S, Nucleic Acids Res. 1994 May 11;22(9):1607-12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7515488 7515488]
Sequence-dependent effects in drug-DNA interaction: the crystal structure of Hoechst 33258 bound to the d(CGCAAATTTGCG)2 duplex., Spink N, Brown DG, Skelly JV, Neidle S, Nucleic Acids Res. 1994 May 11;22(9):1607-12. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=7515488 7515488]
[[Category: Protein complex]]
[[Category: Protein complex]]
[[Category: Brown, D.G.]]
[[Category: Brown, D G.]]
[[Category: Neidle, S.]]
[[Category: Neidle, S.]]
[[Category: Skelly, J.V.]]
[[Category: Skelly, J V.]]
[[Category: Spink, N.]]
[[Category: Spink, N.]]
[[Category: HT]]
[[Category: HT]]
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[[Category: double helix]]
[[Category: double helix]]


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