6MRK

Crystal structure of dmNxf2 NTF2-like domain in complex with Nxt1/p15


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.217 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The nascent RNA binding complex SFiNX licenses piRNA-guided heterochromatin formation.

Batki, J.Schnabl, J.Wang, J.Handler, D.Andreev, V.I.Stieger, C.E.Novatchkova, M.Lampersberger, L.Kauneckaite, K.Xie, W.Mechtler, K.Patel, D.J.Brennecke, J.

(2019) Nat Struct Mol Biol 26: 720-731

  • DOI: 10.1038/s41594-019-0270-6
  • Primary Citation of Related Structures:  
    6OPF, 6MRK

  • PubMed Abstract: 
  • The PIWI-interacting RNA (piRNA) pathway protects genome integrity in part through establishing repressive heterochromatin at transposon loci. Silencing requires piRNA-guided targeting of nuclear PIWI proteins to nascent transposon transcripts, yet the subsequent molecular events are not understood ...

    The PIWI-interacting RNA (piRNA) pathway protects genome integrity in part through establishing repressive heterochromatin at transposon loci. Silencing requires piRNA-guided targeting of nuclear PIWI proteins to nascent transposon transcripts, yet the subsequent molecular events are not understood. Here, we identify SFiNX (silencing factor interacting nuclear export variant), an interdependent protein complex required for Piwi-mediated cotranscriptional silencing in Drosophila. SFiNX consists of Nxf2-Nxt1, a gonad-specific variant of the heterodimeric messenger RNA export receptor Nxf1-Nxt1 and the Piwi-associated protein Panoramix. SFiNX mutant flies are sterile and exhibit transposon derepression because piRNA-loaded Piwi is unable to establish heterochromatin. Within SFiNX, Panoramix recruits heterochromatin effectors, while the RNA binding protein Nxf2 licenses cotranscriptional silencing. Our data reveal how Nxf2 might have evolved from an RNA transport receptor into a cotranscriptional silencing factor. Thus, NXF variants, which are abundant in metazoans, can have diverse molecular functions and might have been coopted for host genome defense more broadly.


    Organizational Affiliation

    Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter, Vienna, Austria. julius.brennecke@imba.oeaw.ac.at.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nuclear RNA export factor 2A, C [auth B]206Drosophila melanogasterMutation(s): 0 
Gene Names: nxf2CG4118
UniProt
Find proteins for Q9VV73 (Drosophila melanogaster)
Explore Q9VV73 
Go to UniProtKB:  Q9VV73
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
NTF2-related export proteinB [auth U], D [auth V]133Drosophila melanogasterMutation(s): 0 
Gene Names: Nxt1CG12752
UniProt
Find proteins for Q9V3H8 (Drosophila melanogaster)
Explore Q9V3H8 
Go to UniProtKB:  Q9V3H8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.54α = 90
b = 74.09β = 90
c = 155.81γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-10-13 
  • Released Date: 2019-07-03 
  • Deposition Author(s): Wang, J., Patel, D.J.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP30 GM124165
Department of Energy (DOE, United States)United StatesDE-AC02-06CH11357

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-03
    Type: Initial release
  • Version 1.1: 2019-08-21
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-04
    Changes: Author supporting evidence