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208d
From Proteopedia
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| - | [[Image:208d.gif|left|200px]] | + | [[Image:208d.gif|left|200px]] |
| - | + | ||
| - | '''HIGH-RESOLUTION STRUCTURE OF A DNA HELIX FORMING (C.G)*G BASE TRIPLETS''' | + | {{Structure |
| + | |PDB= 208d |SIZE=350|CAPTION= <scene name='initialview01'>208d</scene>, resolution 2.050Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM ION'>MG</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''HIGH-RESOLUTION STRUCTURE OF A DNA HELIX FORMING (C.G)*G BASE TRIPLETS''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 208D is a [ | + | 208D 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=208D OCA]. |
==Reference== | ==Reference== | ||
| - | High-resolution structure of a DNA helix forming (C.G)*G base triplets., Van Meervelt L, Vlieghe D, Dautant A, Gallois B, Precigoux G, Kennard O, Nature. 1995 Apr 20;374(6524):742-4. PMID:[http:// | + | High-resolution structure of a DNA helix forming (C.G)*G base triplets., Van Meervelt L, Vlieghe D, Dautant A, Gallois B, Precigoux G, Kennard O, Nature. 1995 Apr 20;374(6524):742-4. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7715732 7715732] |
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Dautant, A.]] | [[Category: Dautant, A.]] | ||
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[[Category: double helix]] | [[Category: double helix]] | ||
| - | ''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 15:42:00 2008'' |
Revision as of 13:42, 20 March 2008
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| , resolution 2.050Å | |||||||
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
HIGH-RESOLUTION STRUCTURE OF A DNA HELIX FORMING (C.G)*G BASE TRIPLETS
Overview
Triple helices result from interaction between single- and double-stranded nucleic acids. Their formation is a possible mechanism for recombination of homologous gene sequences in nature and provides, inter alia, a basis for artificial control of gene activity. Triple-helix motifs have been extensively studied by a variety of techniques, but few high-resolution structural data are available. The only triplet structures characterized so far by X-ray diffraction were in protein-DNA complexes studied at about 3 A resolution. We report here the X-ray analysis of a DNA nonamer, d(GCGAATTCG), to a resolution of 2.05 A, in which the extended crystal structure contains (C.G)*G triplets as a fragment of triple helix. The guanosine-containing chains are in a parallel orientation. This arrangement is a necessary feature of models for homologous recombination which results ultimately in replacement of one length of DNA by another of similar sequence. The present-structure agrees with many published predictions of triplex organization, and provides an accurate representation of an element that allows sequence-specific association between single- and double-stranded nucleic acids.
About this Structure
208D is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
High-resolution structure of a DNA helix forming (C.G)*G base triplets., Van Meervelt L, Vlieghe D, Dautant A, Gallois B, Precigoux G, Kennard O, Nature. 1995 Apr 20;374(6524):742-4. PMID:7715732
Page seeded by OCA on Thu Mar 20 15:42:00 2008
