263d

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[[Image:263d.jpg|left|200px]]<br /><applet load="263d" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:263d.jpg|left|200px]]
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caption="263d, resolution 2.200&Aring;" />
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'''ISOHELICITY AND PHASING IN DRUG-DNA SEQUENCE RECOGNITION: CRYSTAL STRUCTURE OF A TRIS(BENZIMIDAZOLE)-OLIGONUCLEOTIDE COMPLEX'''<br />
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{{Structure
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|PDB= 263d |SIZE=350|CAPTION= <scene name='initialview01'>263d</scene>, resolution 2.200&Aring;
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|SITE=
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|LIGAND= <scene name='pdbligand=TBZ:2''-(4-METHOXYPHENYL)-5-(3-AMINO-1-PYRROLIDINYL)-2,5',2',5''-TRI-BENZIMIDAZOLE'>TBZ</scene>
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|ACTIVITY=
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|GENE=
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}}
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'''ISOHELICITY AND PHASING IN DRUG-DNA SEQUENCE RECOGNITION: CRYSTAL STRUCTURE OF A TRIS(BENZIMIDAZOLE)-OLIGONUCLEOTIDE COMPLEX'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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263D is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/ ] with <scene name='pdbligand=TBZ:'>TBZ</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=263D OCA].
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263D is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/ ]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=263D OCA].
==Reference==
==Reference==
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Isohelicity and phasing in drug--DNA sequence recognition: crystal structure of a tris(benzimidazole)--oligonucleotide complex., Clark GR, Gray EJ, Neidle S, Li YH, Leupin W, Biochemistry. 1996 Oct 29;35(43):13745-52. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8901516 8901516]
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Isohelicity and phasing in drug--DNA sequence recognition: crystal structure of a tris(benzimidazole)--oligonucleotide complex., Clark GR, Gray EJ, Neidle S, Li YH, Leupin W, Biochemistry. 1996 Oct 29;35(43):13745-52. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8901516 8901516]
[[Category: Protein complex]]
[[Category: Protein complex]]
[[Category: Clark, G R.]]
[[Category: Clark, G R.]]
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[[Category: double helix]]
[[Category: double helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:21:57 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:43:27 2008''

Revision as of 13:43, 20 March 2008

Image:263d.jpg


PDB ID 263d

Drag the structure with the mouse to rotate
, resolution 2.200Å
Ligands:
Coordinates: save as pdb, mmCIF, xml



ISOHELICITY AND PHASING IN DRUG-DNA SEQUENCE RECOGNITION: CRYSTAL STRUCTURE OF A TRIS(BENZIMIDAZOLE)-OLIGONUCLEOTIDE COMPLEX


Overview

The crystal structure is reported of a tris(benzimidazole) analogue of the minor-groove drug Hoechst 33258 bound to the sequence d(CGCAAATTTGCG)2. The structure has been refined to an R factor of 17.4% at a resolution of 2.2 A. The ligand covers approximately 7 1/2 base pairs, including the 5'-AAATTT central sequence. This has an exceptionally narrow minor-groove width, together with high propeller twists for individual base pairs. The ligand has a highly twisted structure, with an overall twist of 50 degrees between aromatic rings. All three benzimidazole subunits are in register with the DNA, and there is a symmetric group of six hydrogen bonds between ligand and A.T base-pair edges. By contrast, the ligand does not show an optimal isohelical fit to the DNA. The correct phasing of drug and DNA base pairs is ensured by a number of changes to the DNA such that the central 5'-AAATTT region is slightly unwound relative to the structures of other noncovalent minor-groove drug complexes.

About this Structure

263D is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.

Reference

Isohelicity and phasing in drug--DNA sequence recognition: crystal structure of a tris(benzimidazole)--oligonucleotide complex., Clark GR, Gray EJ, Neidle S, Li YH, Leupin W, Biochemistry. 1996 Oct 29;35(43):13745-52. PMID:8901516

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