The crystal structure of human Argonaute2.
The crystal structure of human Argonaute2.
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DOI:
10.1126/science.1221551
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发表时间:
2012-05-25
期刊:
影响因子:
--
通讯作者:
MacRae IJ
中科院分区:
文献类型:
--
作者:
Schirle NT;MacRae IJ
Argonaute proteins form the functional core of the RNA-induced silencing complexes (RISCs) that mediate RNA silencing in eukaryotes. The 2.3 Å resolution crystal structure of human Argonaute2 (Ago2) reveals a bi-lobed molecule with a central cleft for binding guide and target RNAs. Nucleotides 2 to 6 of a heterogeneous mixture of guide RNAs are positioned in an A-form conformation for base pairing with mRNA targets. Between nucleotides 6 and 7 there is a kink, which may function in miRNA target recognition or release of sliced RNA products. Tandem tryptophan binding pockets in the PIWI domain define a likely interaction surface for recruitment of GW182 or other tryptophan-rich cofactors. These results will enable structure-based approaches for harnessing the untapped therapeutic potential of RNA silencing in humans.
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DOI:
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期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
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通讯作者:
Joshua-Tor, L