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1nao

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{{STRUCTURE_1nao| PDB=1nao | SCENE= }}
{{STRUCTURE_1nao| PDB=1nao | SCENE= }}
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'''SOLUTION STRUCTURE OF AN RNA 2'-O-METHYLATED RNA DUPLEX CONTAINING AN RNA/DNA HYBRID SEGMENT AT THE CENTER, NMR, MINIMIZED AVERAGE STRUCTURE'''
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===SOLUTION STRUCTURE OF AN RNA 2'-O-METHYLATED RNA DUPLEX CONTAINING AN RNA/DNA HYBRID SEGMENT AT THE CENTER, NMR, MINIMIZED AVERAGE STRUCTURE===
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==Overview==
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The solution structure of an RNA.2'-O-methylated RNA hybrid duplex containing an RNA.DNA hybrid segment at its center, (ggagaugac).(GmUmCmATCTCmCm), where lowercase letters, capital letters, and capital letters with the subscript m are RNA, DNA, and 2'-O-methylated RNA residues, respectively, was determined by observing the NMR spectra and performing the full relaxation matrix refinement. The 2'-O-methylation gives several characteristic features to oligoribonucleotides. In addition, this hybrid duplex is cleaved at a specific position by Escherichia coli ribonuclease HI, and so the role of the tertiary structure during the substrate recognition by the enzyme is of interest. The NOE connectivities among the proton resonances revealed that the duplex was a right handed helix. The 2'-O-methylated RNA segments had a typical C3'-endo conformation, and the 2'-O-methyl groups were directed to the minor groove of this duplex, taking the torsion angles phi (C1'-C2'-02'-CH3) that were all gauche(+). The DNA residues in the central RNA.DNA hybrid duplex formed the C3'-endo conformation, except for the middle thymine residue. No remarkable structural discontinuities were observed around the junction sites at either the 5'- or 3'-end of the DNA. The overall structure was close to the typical A-form duplex.
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(as it appears on PubMed at http://www.pubmed.gov), where 9054564 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9054564}}
==About this Structure==
==About this Structure==
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NAO OCA].
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Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NAO OCA].
==Reference==
==Reference==
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[[Category: Ohtsuka, E.]]
[[Category: Ohtsuka, E.]]
[[Category: Dna/rna duplex]]
[[Category: Dna/rna duplex]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 02:18:01 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 15:36:05 2008''

Revision as of 12:36, 29 July 2008

Image:1nao.png

Template:STRUCTURE 1nao

SOLUTION STRUCTURE OF AN RNA 2'-O-METHYLATED RNA DUPLEX CONTAINING AN RNA/DNA HYBRID SEGMENT AT THE CENTER, NMR, MINIMIZED AVERAGE STRUCTURE

Template:ABSTRACT PUBMED 9054564

About this Structure

Full experimental information is available from OCA.

Reference

Solution structure of an RNA.2'-O-methylated RNA hybrid duplex containing an RNA.DNA hybrid segment at the center., Nishizaki T, Iwai S, Ohtsuka E, Nakamura H, Biochemistry. 1997 Mar 4;36(9):2577-85. PMID:9054564

Page seeded by OCA on Tue Jul 29 15:36:05 2008

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