2f8s
From Proteopedia
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|PDB= 2f8s |SIZE=350|CAPTION= <scene name='initialview01'>2f8s</scene>, resolution 3.00Å | |PDB= 2f8s |SIZE=350|CAPTION= <scene name='initialview01'>2f8s</scene>, resolution 3.00Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=A:ADENOSINE-5'-MONOPHOSPHATE'>A</scene>, <scene name='pdbligand=C:CYTIDINE-5'-MONOPHOSPHATE'>C</scene>, <scene name='pdbligand=G:GUANOSINE-5'-MONOPHOSPHATE'>G</scene>, <scene name='pdbligand=U:URIDINE-5'-MONOPHOSPHATE'>U</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[2f8t|2F8T]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2f8s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2f8s OCA], [http://www.ebi.ac.uk/pdbsum/2f8s PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2f8s RCSB]</span> | ||
}} | }} | ||
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[[Category: sirna]] | [[Category: sirna]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:59:25 2008'' |
Revision as of 23:59, 30 March 2008
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| , resolution 3.00Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , , | ||||||
| Related: | 2F8T
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of Aa-Ago with externally-bound siRNA
Overview
Argonaute proteins are key components of the RNA-induced silencing complex (RISC). They provide both architectural and catalytic functionalities associated with small interfering RNA (siRNA) guide strand recognition and subsequent guide strand-mediated cleavage of complementary mRNAs. We report on the 3.0 A crystal structures of 22-mer and 26-mer siRNAs bound to Aquifex aeolicus Argonaute (Aa-Ago), where one 2 nt 3' overhang of the siRNA inserts into a cavity positioned on the outer surface of the PAZ-containing lobe of the bilobal Aa-Ago architecture. The first overhang nucleotide stacks over a tyrosine ring, while the second overhang nucleotide, together with the intervening sugar-phosphate backbone, inserts into a preformed surface cavity. Photochemical crosslinking studies on Aa-Ago with 5-iodoU-labeled single-stranded siRNA and siRNA duplex provide support for this externally bound siRNA-Aa-Ago complex. The structure and biochemical data together provide insights into a protein-RNA recognition event potentially associated with the RISC-loading pathway.
About this Structure
2F8S is a Single protein structure of sequence from Aquifex aeolicus. Full crystallographic information is available from OCA.
Reference
A potential protein-RNA recognition event along the RISC-loading pathway from the structure of A. aeolicus Argonaute with externally bound siRNA., Yuan YR, Pei Y, Chen HY, Tuschl T, Patel DJ, Structure. 2006 Oct;14(10):1557-65. PMID:17027504
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