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[[Image:1exl.gif|left|200px]]
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[[Image:1exl.png|left|200px]]


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{{STRUCTURE_1exl|  PDB=1exl  |  SCENE=  }}  
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'''STRUCTURE OF AN 11-MER DNA DUPLEX CONTAINING THE CARBOCYCLIC NUCLEOTIDE ANALOG: 2'-DEOXYARISTEROMYCIN'''
===STRUCTURE OF AN 11-MER DNA DUPLEX CONTAINING THE CARBOCYCLIC NUCLEOTIDE ANALOG: 2'-DEOXYARISTEROMYCIN===




==Overview==
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2'-deoxyaristeromycin (dAr) is a nucleoside analogue that is resistant to the action of DNA glycosylases. High-resolution NMR spectroscopy and molecular dynamics simulations were used to determine the three-dimensional structure of an 11-mer DNA containing a single dAr.T base pair at its center. Analysis of the spectra revealed the existence of a right-handed duplex in solution, stabilized by Watson-Crick hydrogen bonding and base-stacking interactions. The carbocyclic sugar adopted a C1'-exo conformation and sugars of the 3'-flanking base pair had puckers in the O4'-endo range. The dAr.T base pair was mildly propeller twisted, and the dAr analogue showed a positive roll with the 3'-flanking base. Our findings indicate that the observed resistance of dAr-containing oligodeoxynucleotides to the catalytic action of DNA glycosylases relates to its electronic properties rather than structure, and validate the use of dAr and related carbocyclic nucleoside analogues for biological and structure/function relationship studies.
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{{ABSTRACT_PUBMED_10949165}}


==About this Structure==
==About this Structure==
Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EXL OCA].  
Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EXL OCA].  


==Reference==
==Reference==
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[[Category: Dna]]
[[Category: Dna]]
[[Category: Modified nucleotide]]
[[Category: Modified nucleotide]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 15:38:30 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 02:10:40 2008''

Revision as of 23:10, 30 June 2008

File:1exl.png

Template:STRUCTURE 1exl

STRUCTURE OF AN 11-MER DNA DUPLEX CONTAINING THE CARBOCYCLIC NUCLEOTIDE ANALOG: 2'-DEOXYARISTEROMYCIN

Template:ABSTRACT PUBMED 10949165

About this Structure

Full experimental information is available from OCA.

Reference

Structure of an 11-mer DNA duplex containing the carbocyclic nucleotide analog: 2'-deoxyaristeromycin., Smirnov S, Johnson F, Marumoto R, de los Santos C, J Biomol Struct Dyn. 2000 Jun;17(6):981-91. PMID:10949165

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