6TL1

Crystal structure of the TASOR pseudo-PARP domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.03 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

TASOR is a pseudo-PARP that directs HUSH complex assembly and epigenetic transposon control.

Douse, C.H.Tchasovnikarova, I.A.Timms, R.T.Protasio, A.V.Seczynska, M.Prigozhin, D.M.Albecka, A.Wagstaff, J.Williamson, J.C.Freund, S.M.V.Lehner, P.J.Modis, Y.

(2020) Nat Commun 11: 4940-4940

  • DOI: https://doi.org/10.1038/s41467-020-18761-6
  • Primary Citation of Related Structures:  
    6TL1

  • PubMed Abstract: 

    The HUSH complex represses retroviruses, transposons and genes to maintain the integrity of vertebrate genomes. HUSH regulates deposition of the epigenetic mark H3K9me3, but how its three core subunits - TASOR, MPP8 and Periphilin - contribute to assembly and targeting of the complex remains unknown. Here, we define the biochemical basis of HUSH assembly and find that its modular architecture resembles the yeast RNA-induced transcriptional silencing complex. TASOR, the central HUSH subunit, associates with RNA processing components. TASOR is required for H3K9me3 deposition over LINE-1 repeats and repetitive exons in transcribed genes. In the context of previous studies, this suggests that an RNA intermediate is important for HUSH activity. We dissect the TASOR and MPP8 domains necessary for transgene repression. Structure-function analyses reveal TASOR bears a catalytically-inactive PARP domain necessary for targeted H3K9me3 deposition. We conclude that TASOR is a multifunctional pseudo-PARP that directs HUSH assembly and epigenetic regulation of repetitive genomic targets.


  • Organizational Affiliation

    Molecular Immunity Unit, Department of Medicine, University of Cambridge, MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, CB2 0QH, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein TASOR
A, B
214Homo sapiensMutation(s): 0 
Gene Names: TASORC3orf63FAM208AKIAA1105
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UK61 (Homo sapiens)
Explore Q9UK61 
Go to UniProtKB:  Q9UK61
PHAROS:  Q9UK61
GTEx:  ENSG00000163946 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UK61
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.59α = 90
b = 74.59β = 90
c = 184.04γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
AutoSolphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom101908/Z/13/Z
Wellcome TrustUnited Kingdom217191/Z/19/Z
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/N011791/1

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-16
    Type: Initial release
  • Version 1.1: 2020-10-14
    Changes: Database references
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references