4WIJ

HUMAN SPLICING FACTOR, CONSTRUCT 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.49 Å
  • R-Value Free: 0.335 
  • R-Value Work: 0.272 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The structure of human SFPQ reveals a coiled-coil mediated polymer essential for functional aggregation in gene regulation.

Lee, M.Sadowska, A.Bekere, I.Ho, D.Gully, B.S.Lu, Y.Iyer, K.S.Trewhella, J.Fox, A.H.Bond, C.S.

(2015) Nucleic Acids Res. 43: 3826-3840

  • DOI: 10.1093/nar/gkv156
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • SFPQ, (a.k.a. PSF), is a human tumor suppressor protein that regulates many important functions in the cell nucleus including coordination of long non-coding RNA molecules into nuclear bodies. Here we describe the first crystal structures of Splicing ...

    SFPQ, (a.k.a. PSF), is a human tumor suppressor protein that regulates many important functions in the cell nucleus including coordination of long non-coding RNA molecules into nuclear bodies. Here we describe the first crystal structures of Splicing Factor Proline and Glutamine Rich (SFPQ), revealing structural similarity to the related PSPC1/NONO heterodimer and a strikingly extended structure (over 265 Å long) formed by an unusual anti-parallel coiled-coil that results in an infinite linear polymer of SFPQ dimers within the crystals. Small-angle X-ray scattering and transmission electron microscopy experiments show that polymerization is reversible in solution and can be templated by DNA. We demonstrate that the ability to polymerize is essential for the cellular functions of SFPQ: disruptive mutation of the coiled-coil interaction motif results in SFPQ mislocalization, reduced formation of nuclear bodies, abrogated molecular interactions and deficient transcriptional regulation. The coiled-coil interaction motif thus provides a molecular explanation for the functional aggregation of SFPQ that directs its role in regulating many aspects of cellular nucleic acid metabolism.


    Organizational Affiliation

    School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia Harry Perkins Institute for Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Crawley, Western Australia 6009, Australia.,School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia Charles.Bond@uwa.edu.au Archa.Fox@perkins.uwa.edu.au.,School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia.,School of Molecular Bioscience, University of Sydney, Sydney, NSW 2006, Australia.,Harry Perkins Institute for Medical Research, QEII Medical Centre, Nedlands and Centre for Medical Research, The University of Western Australia, Crawley, Western Australia 6009, Australia Charles.Bond@uwa.edu.au Archa.Fox@perkins.uwa.edu.au.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Splicing factor, proline- and glutamine-rich
A, B
326Homo sapiensMutation(s): 0 
Gene Names: SFPQ (PSF)
Find proteins for P23246 (Homo sapiens)
Go to Gene View: SFPQ
Go to UniProtKB:  P23246
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.49 Å
  • R-Value Free: 0.335 
  • R-Value Work: 0.272 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 66.580α = 90.00
b = 66.580β = 90.00
c = 398.020γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
BUSTERrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2014-09-26 
  • Released Date: 2015-04-01 
  • Deposition Author(s): lee, M., bond, c.s.

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (Australia)Australia513880
National Health and Medical Research Council (Australia)Australia1048659
National Health and Medical Research Council (Australia)Australia1050585
National Health and Medical Research Council (Australia)Australia513935

Revision History 

  • Version 1.0: 2015-04-01
    Type: Initial release
  • Version 1.1: 2015-04-29
    Type: Database references
  • Version 1.2: 2017-09-20
    Type: Author supporting evidence, Data collection, Database references, Derived calculations, Other, Source and taxonomy