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1mwg

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[[Image:1mwg.jpg|left|200px]]
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{{STRUCTURE_1mwg| PDB=1mwg | SCENE= }}
{{STRUCTURE_1mwg| PDB=1mwg | SCENE= }}
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'''STRUCTURE OF RIBONUCLEIC ACID, NMR, MINIMIZED AVERAGE STRUCTURE'''
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===STRUCTURE OF RIBONUCLEIC ACID, NMR, MINIMIZED AVERAGE STRUCTURE===
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==Overview==
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The three-dimensional solution structure of the RNA self-complementary duplex [sequence: see text] was derived from two-dimensional NMR and the iterative relaxation matrix approach. Each GA mismatch forms two hydrogen bonds: A-NH6 to G-O6 and A-N1 to G-NH1 (imino). This is the first three-dimensional RNA structure with imino hydrogen-bonded tandem GA mismatches. This GA structure is totally different from the sheared tandem GA structure in [sequence: see text] which also has two hydrogen bonds: A-N7 to G-NH2 and A-NH6 to G-N3 [SantaLucia, J., Jr., &amp; Turner, D. H. (1993) Biochemistry 32, 12612-12623]. In particular, the sheared and imino GA mismatches produce a narrowing and widening of the backbone, respectively. The results show that substitutions of Watson-Crick base pairs can have dramatic effects on the three-dimensional structures of adjacent non-Watson-Crick paired regions; i.e., the structure depends on sequence context. Thus compensating substitutions in site-directed mutagenesis experiments may not always restore biological activities.
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The line below this paragraph, {{ABSTRACT_PUBMED_8703939}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 8703939 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8703939}}
==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=1MWG OCA].
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Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MWG OCA].
==Reference==
==Reference==
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[[Category: G:a mismatch]]
[[Category: G:a mismatch]]
[[Category: Ribonucleic acid]]
[[Category: Ribonucleic acid]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 01:48:07 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 15:01:45 2008''

Revision as of 12:02, 27 July 2008

Image:1mwg.png

Template:STRUCTURE 1mwg

STRUCTURE OF RIBONUCLEIC ACID, NMR, MINIMIZED AVERAGE STRUCTURE

Template:ABSTRACT PUBMED 8703939

About this Structure

Full experimental information is available from OCA.

Reference

Solution structure of (rGCGGACGC)2 by two-dimensional NMR and the iterative relaxation matrix approach., Wu M, Turner DH, Biochemistry. 1996 Jul 30;35(30):9677-89. PMID:8703939

Page seeded by OCA on Sun Jul 27 15:01:45 2008

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