From Proteopedia
(Difference between revisions)
proteopedia linkproteopedia link
|
|
| Line 1: |
Line 1: |
| - | [[Image:1roq.gif|left|200px]] | + | {{Seed}} |
| | + | [[Image:1roq.png|left|200px]] |
| | | | |
| | <!-- | | <!-- |
| Line 9: |
Line 10: |
| | {{STRUCTURE_1roq| PDB=1roq | SCENE= }} | | {{STRUCTURE_1roq| PDB=1roq | SCENE= }} |
| | | | |
| - | '''Extending the Family of UNCG-like Tetraloop Motifs: NMR Structure of a CACG Tetraloop from Coxsackievirus B3'''
| + | ===Extending the Family of UNCG-like Tetraloop Motifs: NMR Structure of a CACG Tetraloop from Coxsackievirus B3=== |
| | | | |
| | | | |
| - | ==Overview==
| + | <!-- |
| - | Stable RNA tetraloop motifs are found frequently in biologically active RNAs. These motifs carry out a wide variety of functions in RNA folding, in RNA-RNA and RNA-protein interactions. A great deal of knowledge about the structures and functions of tetraloop motifs has accumulated largely due to intensive theoretical, biochemical, and biophysical studies on three most frequently occurring families of tetraloop sequences, namely, the cUNCGg, the cGNRAg, and the gCUUGc sequences. Our knowledge surely is not exhaustive, and efforts are still being made to gain a better understanding. Here we report the NMR structure of a uCACGg tetraloop that occurs naturally within the cloverleaf RNA structure of the 5'-UTR of coxsackievirus B3. This tetraloop is the major determinant for interaction between the cloverleaf RNA and viral 3C protease, which is an essential part of a ribonucleoprotein complex that plays a critical role in the regulation of viral translation and replication. Our structure shows that the CACG tetraloop is closed by a wobble U.G base pair. The structure of the CACG tetraloop is stabilized by extensive base stacking and hydrogen bonding interactions strikingly similar to those previously reported for the cUUCGg tetraloop. Identification of these hallmark structural features strongly supports the existence of an extended YNCG tetraloop family. The U.G base pair closing the stem and the A residue in the loop introduce some small structural and themodynamic distinctions from the canonical cUUCGg tetraloop that may be important for recognition by the viral 3C protease.
| + | The line below this paragraph, {{ABSTRACT_PUBMED_12693932}}, adds the Publication Abstract to the page |
| | + | (as it appears on PubMed at http://www.pubmed.gov), where 12693932 is the PubMed ID number. |
| | + | --> |
| | + | {{ABSTRACT_PUBMED_12693932}} |
| | | | |
| | ==About this Structure== | | ==About this Structure== |
| - | Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ROQ OCA]. | + | Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ROQ OCA]. |
| | | | |
| | ==Reference== | | ==Reference== |
| Line 25: |
Line 29: |
| | [[Category: Yu, J.]] | | [[Category: Yu, J.]] |
| | [[Category: Rna tetra-loop]] | | [[Category: Rna tetra-loop]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:44:00 2008'' | + | |
| | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 21:44:45 2008'' |
Revision as of 18:44, 28 July 2008
Template:STRUCTURE 1roq
Extending the Family of UNCG-like Tetraloop Motifs: NMR Structure of a CACG Tetraloop from Coxsackievirus B3
Template:ABSTRACT PUBMED 12693932
About this Structure
Full experimental information is available from OCA.
Reference
Extending the family of UNCG-like tetraloop motifs: NMR structure of a CACG tetraloop from coxsackievirus B3., Du Z, Yu J, Andino R, James TL, Biochemistry. 2003 Apr 22;42(15):4373-83. PMID:12693932
Page seeded by OCA on Mon Jul 28 21:44:45 2008
