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1rde

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[[Image:1rde.gif|left|200px]]
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{{STRUCTURE_1rde| PDB=1rde | SCENE= }}
{{STRUCTURE_1rde| PDB=1rde | SCENE= }}
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'''NMR structure of the thrombin-binding DNA aptamer stabilized by Sr2+'''
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===NMR structure of the thrombin-binding DNA aptamer stabilized by Sr2+===
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==Overview==
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The structure of thrombin-binding DNA aptamer complexed with a single Sr2+ ion (Sr2+:TBA complex) has been determined using NMR spectroscopy and restrained molecular dynamics simulations. The quadruplex structure for the Sr2+:TBA complex is similar in topology, but distinct in structure, from that previously reported for the K+:TBA complex. The inter-tetrad distance of the Sr2+:TBA complex is 3.8 angstroms, or 0.7 angstroms larger than in the K+:TBA complex. This substantial difference can be attributed to a different binding site for Sr2+ in the Sr2+:TBA complex than for K+ in the K+:TBA complex. The Sr2+:TBA complex assumes a 1:1 stoichiometry, and it is very likely that the Sr2+ ion simultaneously interacts with the eight O6 atoms of the two G-tetrads. The results indicate that quadruplex DNA structures are highly sensitive to the presence of specific metal ions. The binding of specific metal ions may modulate the biological activity of quadruplex DNA structures in vivo.
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The line below this paragraph, {{ABSTRACT_PUBMED_15214802}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 15214802 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15214802}}
==About this Structure==
==About this Structure==
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RDE OCA].
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Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RDE OCA].
==Reference==
==Reference==
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[[Category: Sr2+]]
[[Category: Sr2+]]
[[Category: Thrombin-binding dna]]
[[Category: Thrombin-binding dna]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:21:41 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 12:38:12 2008''

Revision as of 09:38, 28 July 2008

Image:1rde.png

Template:STRUCTURE 1rde

NMR structure of the thrombin-binding DNA aptamer stabilized by Sr2+

Template:ABSTRACT PUBMED 15214802

About this Structure

Full experimental information is available from OCA.

Reference

NMR structure of the thrombin-binding DNA aptamer stabilized by Sr2+., Mao X, Marky LA, Gmeiner WH, J Biomol Struct Dyn. 2004 Aug;22(1):25-33. PMID:15214802

Page seeded by OCA on Mon Jul 28 12:38:12 2008

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