
Protein and RNA Structure
We investigate of biology through molecular form and function. We determine structures of RNA-protein complexes using x-ray crystallography and electron microscopy and combine these results with biochemical and cellular assays that probe molecular mechanisms. Most of our efforts in recent years have been devoted to understanding how Argonaute and Piwi proteins use small RNAs to establish their extraordinary gene-silencing properties.
RELEVANT PUBLICATIONS
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A conserved PIWI silencing complex detects piRNA-target engagement. Mol Cell. 2025
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Structural basis for gene silencing by siRNAs in humans. bioRxiv. 2024
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Structural basis for RNA slicing by a plant Argonaute. Nat Struct Mol Biol. 2023
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A tiny loop in the Argonaute PIWI domain tunes small RNA seed strength. EMBO Rep. 2023
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Relaxed targeting rules help PIWI proteins silence transposons. Nature. 2023
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GTSF1 accelerates target RNA cleavage by PIWI-clade Argonaute proteins. Nature. 2022
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The molecular mechanism of microRNA duplex selectivity of Arabidopsis ARGONAUTE10. NAR. 2022
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A structured RNA motif locks Argonaute2:miR-122 onto the 5' end of the HCV genome. Nature Comm. 2021
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mRNA structural dynamics shape Argonaute-target interactions. NSMB. 2020
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Robust differential microRNA targeting driven by supplementary interactions in vitro. RNA. 2020
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Structural Basis for Target-Directed MicroRNA Degradation. Mol Cell. 2019
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Phase Transitions in the Assembly and Function of Human miRISC. Cell. 2018
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Helix-7 in Argonaute2 shapes the microRNA seed region for rapid target recognition. EMBO J. 2018
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A Dynamic Search Process Underlies MicroRNA Targeting. Cell. 2015
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Water-mediated recognition of t1-adenosine anchors Argonaute2 to microRNA targets. eLife. 2015
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Highly complementary target RNAs promote release of guide RNAs from human Argonaute2. Mol Cell. 2013
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The molecular architecture of human Dicer. Nat Struct Mol Biol. 2012
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Structure of the human Dicer-TRBP complex by electron microscopy. Structure. 2009
