2jse
From Proteopedia
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[[Image:2jse.gif|left|200px]] | [[Image:2jse.gif|left|200px]] | ||
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'''NMR reveals absence of hydrogen bonding in adjacent UU and AG mismatches in an isolated internal loop from ribosomal RNA.''' | '''NMR reveals absence of hydrogen bonding in adjacent UU and AG mismatches in an isolated internal loop from ribosomal RNA.''' | ||
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==About this Structure== | ==About this Structure== | ||
| - | + | Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JSE OCA]. | |
==Reference== | ==Reference== | ||
NMR reveals the absence of hydrogen bonding in adjacent UU and AG mismatches in an isolated internal loop from ribosomal RNA., Shankar N, Xia T, Kennedy SD, Krugh TR, Mathews DH, Turner DH, Biochemistry. 2007 Nov 6;46(44):12665-78. Epub 2007 Oct 11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17929882 17929882] | NMR reveals the absence of hydrogen bonding in adjacent UU and AG mismatches in an isolated internal loop from ribosomal RNA., Shankar N, Xia T, Kennedy SD, Krugh TR, Mathews DH, Turner DH, Biochemistry. 2007 Nov 6;46(44):12665-78. Epub 2007 Oct 11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17929882 17929882] | ||
| - | [[Category: Protein complex]] | ||
[[Category: Shankar, N.]] | [[Category: Shankar, N.]] | ||
[[Category: 2x2 thermodynamic]] | [[Category: 2x2 thermodynamic]] | ||
| - | [[Category: | + | [[Category: Absence of hydrogen bonding]] |
| - | [[Category: | + | [[Category: Ag internal loop]] |
| - | [[Category: | + | [[Category: G base flipped out]] |
| - | [[Category: | + | [[Category: Internal loop from protein l11 binding site]] |
| - | [[Category: | + | [[Category: Lack of hydrogen bonding]] |
| - | [[Category: | + | [[Category: Nmr structure of rna loop 5' gugg 3' / 3' cuac 5s']] |
| - | [[Category: | + | [[Category: Uu internal loop]] |
| - | [[Category: | + | [[Category: Uu/ag internal loop]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 09:15:24 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 06:15, 4 May 2008
NMR reveals absence of hydrogen bonding in adjacent UU and AG mismatches in an isolated internal loop from ribosomal RNA.
Overview
NMR studies provide insights into structural features of internal loops. These insights can be combined with thermodynamic studies to generate models for predicting structure and energetics. The tandem mismatch internal loop, 5'GUGG3'(3'CUAC5'), has been studied by NMR. The NMR structure reveals an internal loop with no hydrogen bonding between the loop bases and with the G in the AG mismatch flipped out of the helix. The sequence of this internal loop is highly conserved in rRNA. The loop is located in the large ribosomal subunit and is part of a conserved 58-nt fragment that is the binding domain of ribosomal protein L11. Structural comparisons between variants of this internal loop in crystal structures of the 58-nt domain complexed with L11 protein and of the large ribosomal subunit (LSU) suggest that this thermodynamically destabilizing internal loop is partially preorganized for tertiary interactions and for binding L11. A model for predicting the base pairing and free energy of 2 x 2 nucleotide internal loops with a purine-purine mismatch next to a pyrimidine-pyrimidine mismatch is proposed on the basis of the present NMR structure and previously reported thermodynamics.
About this Structure
Full crystallographic information is available from OCA.
Reference
NMR reveals the absence of hydrogen bonding in adjacent UU and AG mismatches in an isolated internal loop from ribosomal RNA., Shankar N, Xia T, Kennedy SD, Krugh TR, Mathews DH, Turner DH, Biochemistry. 2007 Nov 6;46(44):12665-78. Epub 2007 Oct 11. PMID:17929882 Page seeded by OCA on Sun May 4 09:15:24 2008
