1v3p
From Proteopedia
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| - | [[Image:1v3p.gif|left|200px]] | + | [[Image:1v3p.gif|left|200px]] |
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| - | '''Crystal structure of d(GCGAGAGC): the DNA octaplex structure with I-motif of G-quartet''' | + | {{Structure |
| + | |PDB= 1v3p |SIZE=350|CAPTION= <scene name='initialview01'>1v3p</scene>, resolution 2.3Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=K:POTASSIUM ION'>K</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Crystal structure of d(GCGAGAGC): the DNA octaplex structure with I-motif of G-quartet''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1V3P is a [ | + | 1V3P 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=1V3P OCA]. |
==Reference== | ==Reference== | ||
| - | Crystal structures of a DNA octaplex with I-motif of G-quartets and its splitting into two quadruplexes suggest a folding mechanism of eight tandem repeats., Kondo J, Adachi W, Umeda S, Sunami T, Takenaka A, Nucleic Acids Res. 2004 May 7;32(8):2541-9. Print 2004. PMID:[http:// | + | Crystal structures of a DNA octaplex with I-motif of G-quartets and its splitting into two quadruplexes suggest a folding mechanism of eight tandem repeats., Kondo J, Adachi W, Umeda S, Sunami T, Takenaka A, Nucleic Acids Res. 2004 May 7;32(8):2541-9. Print 2004. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15133122 15133122] |
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Kondo, J.]] | [[Category: Kondo, J.]] | ||
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[[Category: x-ray analysis]] | [[Category: x-ray analysis]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:40:29 2008'' |
Revision as of 12:40, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of d(GCGAGAGC): the DNA octaplex structure with I-motif of G-quartet
Overview
Recent genomic analyses revealed many kinds of tandem repeats of specific sequences. Some of them are related to genetic diseases, but their biological functions and structures are still unknown. Two X-ray structures of a short DNA fragment d(gcGA[G]1Agc) show that four base-intercalated duplexes are assembled to form an octaplex at a low K+ concentration, in which the eight G5 residues form a stacked double G-quartet in the central part. At a higher K+ concentration, however, the octaplex is split into just two halves. These structural features suggest a folding process of eight tandem repeats of d(ccGA[G]4Agg), according to a double Greek-key motif. Such a packaging of the repeats could facilitate slippage of a certain sequence during DNA replication, to induce increase or decrease of the repeats.
About this Structure
1V3P is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
Crystal structures of a DNA octaplex with I-motif of G-quartets and its splitting into two quadruplexes suggest a folding mechanism of eight tandem repeats., Kondo J, Adachi W, Umeda S, Sunami T, Takenaka A, Nucleic Acids Res. 2004 May 7;32(8):2541-9. Print 2004. PMID:15133122
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