8SWY

PARP4 ART domain bound to NADH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Structural and biochemical analysis of the PARP1-homology region of PARP4/vault PARP.

Frigon, L.Pascal, J.M.

(2023) Nucleic Acids Res 51: 12492-12507

  • DOI: https://doi.org/10.1093/nar/gkad1064
  • Primary Citation of Related Structures:  
    8SWY, 8SWZ, 8SX1, 8SX2

  • PubMed Abstract: 

    PARP4 is an ADP-ribosyltransferase that resides within the vault ribonucleoprotein organelle. Our knowledge of PARP4 structure and biochemistry is limited relative to other PARPs. PARP4 shares a region of homology with PARP1, an ADP-ribosyltransferase that produces poly(ADP-ribose) from NAD+ in response to binding DNA breaks. The PARP1-homology region of PARP4 includes a BRCT fold, a WGR domain, and the catalytic (CAT) domain. Here, we have determined X-ray structures of the PARP4 catalytic domain and performed biochemical analysis that together indicate an active site that is open to NAD+ interaction, in contrast to the closed conformation of the PARP1 catalytic domain that blocks access to substrate NAD+. We have also determined crystal structures of the minimal ADP-ribosyltransferase fold of PARP4 that illustrate active site alterations that restrict PARP4 to mono(ADP-ribose) rather than poly(ADP-ribose) modifications. We demonstrate that PARP4 interacts with vault RNA, and that the BRCT is primarily responsible for the interaction. However, the interaction does not lead to stimulation of mono(ADP-ribosylation) activity. The BRCT-WGR-CAT of PARP4 has lower activity than the CAT alone, suggesting that the BRCT and WGR domains regulate catalytic output. Our study provides first insights into PARP4 structure and regulation and expands understanding of PARP structural biochemistry.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, Qc H3T 1J4, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein mono-ADP-ribosyltransferase PARP4
A, B, C
259Homo sapiensMutation(s): 0 
Gene Names: PARP4ADPRTL1KIAA0177PARPL
EC: 2.4.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UKK3 (Homo sapiens)
Explore Q9UKK3 
Go to UniProtKB:  Q9UKK3
PHAROS:  Q9UKK3
GTEx:  ENSG00000102699 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UKK3
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.904α = 90
b = 151.699β = 90
c = 104.601γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaPJT153295

Revision History  (Full details and data files)

  • Version 1.0: 2023-11-08
    Type: Initial release
  • Version 1.1: 2023-11-29
    Changes: Database references
  • Version 1.2: 2023-12-20
    Changes: Database references