191d
From Proteopedia
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|PDB= 191d |SIZE=350|CAPTION= <scene name='initialview01'>191d</scene>, resolution 1.400Å | |PDB= 191d |SIZE=350|CAPTION= <scene name='initialview01'>191d</scene>, resolution 1.400Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=NA:SODIUM ION'>NA</scene> | + | |LIGAND= <scene name='pdbligand=DC:2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DT:THYMIDINE-5'-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=191d FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=191d OCA], [http://www.ebi.ac.uk/pdbsum/191d PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=191d RCSB]</span> | ||
}} | }} | ||
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[[Category: Ratliff, R.]] | [[Category: Ratliff, R.]] | ||
[[Category: Rich, A.]] | [[Category: Rich, A.]] | ||
| - | [[Category: NA]] | ||
[[Category: base intercalated]] | [[Category: base intercalated]] | ||
[[Category: mismatched]] | [[Category: mismatched]] | ||
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[[Category: u-dna]] | [[Category: u-dna]] | ||
| - | ''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 18:29:50 2008'' |
Revision as of 15:29, 30 March 2008
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| , resolution 1.400Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF INTERCALATED FOUR-STRANDED D(C3T)
Overview
The crystal structure of d(C3T), solved at 1.4 A resolution, reveals that the molecule forms a four-stranded intercalated complex. It consists of two parallel-stranded duplexes, each of which is held together by cytosine-protonated cytosine base pairs. The two duplexes are intercalated with each other and have opposite strand orientation. The molecule has a flat, lath-like appearance, and the covalently bonded cytosines have a slow right-handed twist of 17.1 degrees. However, there is considerable asymmetry. On one of the flat sides, the phosphate groups are rotated away from the center of the molecule. They are held in this orientation by bridging water molecules that bind the NH of cytosine and a phosphate group of an opposite chain. There is also considerable microheterogeneity in the structure. The cytosine hemiprotonation occurs even at pH 7 where stable crystals form.
About this Structure
191D is a Protein complex structure of sequences from [1]. Full crystallographic information is available from OCA.
Reference
Crystal structure of intercalated four-stranded d(C3T) at 1.4 A resolution., Kang CH, Berger I, Lockshin C, Ratliff R, Moyzis R, Rich A, Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11636-40. PMID:7972115
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