6KR6

Crystal structure of Drosophila Piwi


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.240 

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This is version 1.1 of the entry. See complete history


Literature

Crystal structure of Drosophila Piwi.

Yamaguchi, S.Oe, A.Nishida, K.M.Yamashita, K.Kajiya, A.Hirano, S.Matsumoto, N.Dohmae, N.Ishitani, R.Saito, K.Siomi, H.Nishimasu, H.Siomi, M.C.Nureki, O.

(2020) Nat Commun 11: 858-858

  • DOI: 10.1038/s41467-020-14687-1
  • Primary Citation of Related Structures:  
    6KR6

  • PubMed Abstract: 
  • PIWI-clade Argonaute proteins associate with PIWI-interacting RNAs (piRNAs), and silence transposons in animal gonads. Here, we report the crystal structure of the Drosophila PIWI-clade Argonaute Piwi in complex with endogenous piRNAs, at 2.9 Å resolution ...

    PIWI-clade Argonaute proteins associate with PIWI-interacting RNAs (piRNAs), and silence transposons in animal gonads. Here, we report the crystal structure of the Drosophila PIWI-clade Argonaute Piwi in complex with endogenous piRNAs, at 2.9 Å resolution. A structural comparison of Piwi with other Argonautes highlights the PIWI-specific structural features, such as the overall domain arrangement and metal-dependent piRNA recognition. Our structural and biochemical data reveal that, unlike other Argonautes including silkworm Siwi, Piwi has a non-canonical DVDK tetrad and lacks the RNA-guided RNA cleaving slicer activity. Furthermore, we find that the Piwi mutant with the canonical DEDH catalytic tetrad exhibits the slicer activity and readily dissociates from less complementary RNA targets after the slicer-mediated cleavage, suggesting that the slicer activity could compromise the Piwi-mediated co-transcriptional silencing. We thus propose that Piwi lost the slicer activity during evolution to serve as an RNA-guided RNA-binding platform, thereby ensuring faithful co-transcriptional silencing of transposons.


    Organizational Affiliation

    Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan. nureki@bs.s.u-tokyo.ac.jp.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein piwiA810Drosophila melanogasterMutation(s): 0 
Gene Names: piwiCG6122
EC: 3.1.26
UniProt
Find proteins for Q9VKM1 (Drosophila melanogaster)
Explore Q9VKM1 
Go to UniProtKB:  Q9VKM1
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UniProt GroupQ9VKM1
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
piRNAB5Drosophila melanogaster
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.09α = 90
b = 115.64β = 90
c = 119.89γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XSCALEdata scaling
PDB_EXTRACTdata extraction
DIALSdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-19
    Type: Initial release
  • Version 1.1: 2020-02-26
    Changes: Database references