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2g3s

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{{STRUCTURE_2g3s| PDB=2g3s | SCENE= }}
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'''RNA structure containing GU base pairs'''
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===RNA structure containing GU base pairs===
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==Overview==
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The crystal structure of the RNA octamer, 5'-GGCGUGCC-3' has been determined from x-ray diffraction data to 1.5 angstroms resolution. In the crystal, this oligonucleotide forms five self-complementary double-helices in the asymmetric unit. Tandem 5'GU/3'UG basepairs comprise an internal loop in the middle of each duplex. The NMR structure of this octameric RNA sequence is also known, allowing comparison of the variation among the five crystallographic duplexes and the solution structure. The G.U pairs in the five duplexes of the crystal form two direct hydrogen bonds and are stabilized by water molecules that bridge between the base of guanine (N2) and the sugar (O2') of uracil. This contrasts with the NMR structure in which only one direct hydrogen bond is observed for the G.U pairs. The reduced stability of the r(CGUG)2 motif relative to the r(GGUC)2 motif may be explained by the lack of stacking of the uracil bases between the Watson-Crick and G.U pairs as observed in the crystal structure.
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==About this Structure==
==About this Structure==
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[[Category: Rna crystal structure]]
[[Category: Rna crystal structure]]
[[Category: Tandem gu base pair]]
[[Category: Tandem gu base pair]]
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Revision as of 12:15, 29 July 2008

Image:2g3s.png

Template:STRUCTURE 2g3s

RNA structure containing GU base pairs

Template:ABSTRACT PUBMED 16581850

About this Structure

Full crystallographic information is available from OCA.

Reference

The crystal structure at 1.5 angstroms resolution of an RNA octamer duplex containing tandem G.U basepairs., Jang SB, Hung LW, Jeong MS, Holbrook EL, Chen X, Turner DH, Holbrook SR, Biophys J. 2006 Jun 15;90(12):4530-7. Epub 2006 Mar 31. PMID:16581850

Page seeded by OCA on Tue Jul 29 15:15:15 2008

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