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- W2016603058 abstract "Oligomeric Trax–Translin complexes, known as C3PO, are involved in RNA interference and tRNA processing in eukaryotic species including humans. Structural and functional analysis of a Trax-like protein from Archaeoglobus fulgidus that forms an octameric assembly resembling human C3PO provides insight into the mechanism of RNA recognition and cleavage. Oligomeric complexes of Trax and Translin proteins, known as C3POs, participate in several eukaryotic nucleic acid metabolism pathways, including RNA interference and tRNA processing. In RNA interference in humans and Drosophila, C3PO activates the RNA-induced silencing complex (RISC) by removing the passenger strand of the small interfering RNA precursor duplex, using nuclease activity present in Trax. How C3POs engage with nucleic acid substrates is unknown. Here we identify a single protein from Archaeoglobus fulgidus that assembles into an octamer highly similar to human C3PO. The structure in complex with duplex RNA reveals that the octamer entirely encapsulates a single 13-base-pair RNA duplex inside a large inner cavity. Trax-like-subunit catalytic sites target opposite strands of the duplex for cleavage separated by 7 base pairs. The structure provides insight into the mechanism of RNA recognition and cleavage by an archaeal C3PO-like complex." @default.
- W2016603058 created "2016-06-24" @default.
- W2016603058 creator A5044928766 @default.
- W2016603058 creator A5068813878 @default.
- W2016603058 creator A5089510843 @default.
- W2016603058 date "2013-01-27" @default.
- W2016603058 modified "2023-10-18" @default.
- W2016603058 title "Structural basis for duplex RNA recognition and cleavage by Archaeoglobus fulgidus C3PO" @default.
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- W2016603058 doi "https://doi.org/10.1038/nsmb.2487" @default.
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