148d: Difference between revisions

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[[Image:148d.jpg|left|200px]]
{{Seed}}
[[Image:148d.png|left|200px]]


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{{STRUCTURE_148d|  PDB=148d  |  SCENE=  }}  
{{STRUCTURE_148d|  PDB=148d  |  SCENE=  }}  


'''THREE-DIMENSIONAL SOLUTION STRUCTURE OF THE THROMBIN BINDING DNA APTAMER D(GGTTGGTGTGGTTGG)'''
===THREE-DIMENSIONAL SOLUTION STRUCTURE OF THE THROMBIN BINDING DNA APTAMER D(GGTTGGTGTGGTTGG)===




==Overview==
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The DNA oligonucleotide d(GGTTGGTGTGGTTGG) (thrombin aptamer) binds to thrombin and inhibits its enzymatic activity in the chain of reactions that lead to blood clotting. Two-dimensional 1H NMR studies indicate that the oligonucleotide forms a folded structure in solution, composed of two guanine quartets connected by two T-T loops spanning the narrow grooves at one end and a T-G-T loop spanning a wide groove at the other end. We present the assignment strategy used, methods for the structure determination, and the refined three-dimensional structure of the thrombin aptamer. The initial structures were generated by metric matrix distance geometry using distance and dihedral bond angle constraints from NOE and coupling constants, respectively, and refined by restrained molecular dynamics and direct NOE refinement. Knowledge of the three-dimensional structure of this thrombin aptamer may be relevant for the design of improved thrombin-inhibiting anti-coagulants with similar structural motifs.
The line below this paragraph, {{ABSTRACT_PUBMED_8107090}}, adds the Publication Abstract to the page
(as it appears on PubMed at http://www.pubmed.gov), where 8107090 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8107090}}


==About this Structure==
==About this Structure==
Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=148D OCA].  
Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=148D OCA].  


==Reference==
==Reference==
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[[Category: Dna]]
[[Category: Dna]]
[[Category: Nmr]]
[[Category: Nmr]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 09:30:27 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 15:30:38 2008''
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