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244d

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|PDB= 244d |SIZE=350|CAPTION= <scene name='initialview01'>244d</scene>, resolution 1.200&Aring;
|PDB= 244d |SIZE=350|CAPTION= <scene name='initialview01'>244d</scene>, resolution 1.200&Aring;
|SITE=
|SITE=
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|LIGAND= <scene name='pdbligand=NA:SODIUM+ION'>NA</scene> and <scene name='pdbligand=CA:CALCIUM ION'>CA</scene>
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|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=DG:2&#39;-DEOXYGUANOSINE-5&#39;-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5&#39;-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>
|ACTIVITY=
|ACTIVITY=
|GENE=
|GENE=
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|DOMAIN=
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=244d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=244d OCA], [http://www.ebi.ac.uk/pdbsum/244d PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=244d RCSB]</span>
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[[Category: Murchie, A I.H.]]
[[Category: Murchie, A I.H.]]
[[Category: Norman, D G.]]
[[Category: Norman, D G.]]
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[[Category: CA]]
 
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[[Category: NA]]
 
[[Category: parallel-stranded tetraplex]]
[[Category: parallel-stranded tetraplex]]
[[Category: quadruple helix]]
[[Category: quadruple helix]]
[[Category: unusual dna]]
[[Category: unusual dna]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:42:58 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:45:06 2008''

Revision as of 22:45, 30 March 2008


PDB ID 244d

Drag the structure with the mouse to rotate
, resolution 1.200Å
Ligands: , , ,
Resources: FirstGlance, OCA, PDBsum, RCSB
Coordinates: save as pdb, mmCIF, xml



THE HIGH-RESOLUTION CRYSTAL STRUCTURE OF A PARALLEL-STRANDED GUANINE TETRAPLEX


Overview

Repeat tracts of guanine bases found in DNA and RNA can form tetraplex structures in the presence of a variety of monovalent cations. Evidence suggests that guanine tetraplexes assume important functions within chromosomal telomeres, immunoglobulin switch regions, and the human immunodeficiency virus genome. The structure of a parallel-stranded tetraplex formed by the hexanucleotide d(TG4T) and stabilized by sodium cations was determined by x-ray crystallography to 1.2 angstroms resolution. Sharply resolved sodium cations were found between and within planes of hydrogen-bonded guanine quartets, and an ordered groove hydration was observed. Distinct intra- and intermolecular stacking arrangements were adopted by the guanine quartets. Thymine bases were exclusively involved in making extensive lattice contacts.

About this Structure

244D is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.

Reference

The high-resolution crystal structure of a parallel-stranded guanine tetraplex., Laughlan G, Murchie AI, Norman DG, Moore MH, Moody PC, Lilley DM, Luisi B, Science. 1994 Jul 22;265(5171):520-4. PMID:8036494

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