1b6y
From Proteopedia
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|PDB= 1b6y |SIZE=350|CAPTION= <scene name='initialview01'>1b6y</scene> | |PDB= 1b6y |SIZE=350|CAPTION= <scene name='initialview01'>1b6y</scene> | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=DA:2'-DEOXYADENOSINE-5'-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5'-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=EDC:N3,N4-ETHENO-2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>EDC</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1b6y FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b6y OCA], [http://www.ebi.ac.uk/pdbsum/1b6y PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1b6y RCSB]</span> | ||
}} | }} | ||
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[[Category: exocyclic lesion]] | [[Category: exocyclic lesion]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 18:54:56 2008'' |
Revision as of 15:54, 30 March 2008
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| Ligands: | , , , , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
3,N4-ETHENO-2'-DEOXYCYTIDINE OPPOSITE ADENINE IN AN 11-MER DUPLEX, SOLUTION STRUCTURE FROM NMR AND MOLECULAR DYNAMICS, 2 STRUCTURES
Overview
The d(C-G-T-A-C-epsilon C-C-A-T-G-C).d(G-C-A-T-G-A-G-T-A-C-G) oligodeoxynucleotide duplex containing the 3, N4-etheno-2'-deoxycytidine adduct positioned opposite 2'-deoxyadenosine in the center of the helix has been analyzed by proton NMR spectroscopy and restrained molecular dynamics. The spectroscopic data establish a right-handed duplex, with sugar puckers in the C2'-endo/C3'-exo range, residues adopting an anti conformation around the glycosidic torsion angle and, with the exception of epsilon C.dA, Watson-Crick hydrogen bond alignment for all base pairs. Molecular dynamics simulations, restrained by the full relaxation matrix approach, produced a three-dimensional model with an NMR R-factor of 7%. The duplex structure shows no significant perturbation of the sugar-phosphate backbone, which remains in B-form. The exocyclic adduct and its partner dA are incorporated into the helix without producing a noticeable kink. The epsilon C.dA alignment adopts a staggered conformation with each residue displaced toward the 5'-terminus and intercalated between bases on the opposite strand, without increase of inter-phosphate distances. The partial intercalation of the epsilon C (anti).dA(anti) alignment allows stacking between the aromatic rings of epsilon C and dA and with base pairs adjacent to the lesion, suggesting an important role played by hydrophobic forces in the stabilization of the solution structure.
About this Structure
1B6Y is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
Solution structure of an oligodeoxynucleotide duplex containing the exocyclic lesion 3,N4-etheno-2'-deoxycytidine opposite 2'-deoxyadenosine, determined by NMR spectroscopy and restrained molecular dynamics., Korobka A, Cullinan D, Cosman M, Grollman AP, Patel DJ, Eisenberg M, de los Santos C, Biochemistry. 1996 Oct 15;35(41):13310-8. PMID:8873597
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