1z26

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[[Image:1z26.gif|left|200px]]
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{{Seed}}
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[[Image:1z26.png|left|200px]]
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{{STRUCTURE_1z26| PDB=1z26 | SCENE= }}
{{STRUCTURE_1z26| PDB=1z26 | SCENE= }}
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'''Structure of Pyrococcus furiosus Argonaute with bound tungstate'''
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===Structure of Pyrococcus furiosus Argonaute with bound tungstate===
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==Overview==
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Genetic, biochemical and structural studies have implicated Argonaute proteins as the catalytic core of the RNAi effector complex, RISC. Here we show that recombinant, human Argonaute2 can combine with a small interfering RNA (siRNA) to form minimal RISC that accurately cleaves substrate RNAs. Recombinant RISC shows many of the properties of RISC purified from human or Drosophila melanogaster cells but also has surprising features. It shows no stimulation by ATP, suggesting that factors promoting product release are missing from the recombinant enzyme. The active site is made up of a unique Asp-Asp-His (DDH) motif. In the RISC reconstitution system, the siRNA 5' phosphate is important for the stability and the fidelity of the complex but is not essential for the creation of an active enzyme. These studies demonstrate that Argonaute proteins catalyze mRNA cleavage within RISC and provide a source of recombinant enzyme for detailed biochemical studies of the RNAi effector complex.
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(as it appears on PubMed at http://www.pubmed.gov), where 15800637 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15800637}}
==About this Structure==
==About this Structure==
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[[Category: Rnai]]
[[Category: Rnai]]
[[Category: Tungstate]]
[[Category: Tungstate]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:05:46 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 14:35:12 2008''

Revision as of 11:35, 29 July 2008

Image:1z26.png

Template:STRUCTURE 1z26

Structure of Pyrococcus furiosus Argonaute with bound tungstate

Template:ABSTRACT PUBMED 15800637

About this Structure

1Z26 is a Single protein structure of sequence from Pyrococcus furiosus. Full crystallographic information is available from OCA.

Reference

Purified Argonaute2 and an siRNA form recombinant human RISC., Rivas FV, Tolia NH, Song JJ, Aragon JP, Liu J, Hannon GJ, Joshua-Tor L, Nat Struct Mol Biol. 2005 Apr;12(4):340-9. Epub 2005 Mar 30. PMID:15800637

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