5D5K

Crystal Structure NLS from human PARP-2 complexed with Importin alpha delta IBB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.150 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

PARP-2 domain requirements for DNA damage-dependent activation and localization to sites of DNA damage.

Riccio, A.A.Cingolani, G.Pascal, J.M.

(2016) Nucleic Acids Res. 44: 1691-1702

  • DOI: 10.1093/nar/gkv1376

  • PubMed Abstract: 
  • Poly(ADP-ribose) polymerase-2 (PARP-2) is one of three human PARP enzymes that are potently activated during the cellular DNA damage response (DDR). DDR-PARPs detect DNA strand breaks, leading to a dramatic increase in their catalytic production of t ...

    Poly(ADP-ribose) polymerase-2 (PARP-2) is one of three human PARP enzymes that are potently activated during the cellular DNA damage response (DDR). DDR-PARPs detect DNA strand breaks, leading to a dramatic increase in their catalytic production of the posttranslational modification poly(ADP-ribose) (PAR) to facilitate repair. There are limited biochemical and structural insights into the functional domains of PARP-2, which has restricted our understanding of how PARP-2 is specialized toward specific repair pathways. PARP-2 has a modular architecture composed of a C-terminal catalytic domain (CAT), a central Trp-Gly-Arg (WGR) domain and an N-terminal region (NTR). Although the NTR is generally considered the key DNA-binding domain of PARP-2, we report here that all three domains of PARP-2 collectively contribute to interaction with DNA damage. Biophysical, structural and biochemical analyses indicate that the NTR is natively disordered, and is only required for activation on specific types of DNA damage. Interestingly, the NTR is not essential for PARP-2 localization to sites of DNA damage. Rather, the WGR and CAT domains function together to recruit PARP-2 to sites of DNA breaks. Our study differentiates the functions of PARP-2 domains from those of PARP-1, the other major DDR-PARP, and highlights the specialization of the multi-domain architectures of DDR-PARPs.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Importin subunit alpha-1
C
466Mus musculusMutation(s): 0 
Gene Names: Kpna2 (Rch1)
Find proteins for P52293 (Mus musculus)
Go to UniProtKB:  P52293
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Poly [ADP-ribose] polymerase 2
B
98Homo sapiensMutation(s): 0 
Gene Names: PARP2 (ADPRT2, ADPRTL2)
EC: 2.4.2.30
Find proteins for Q9UGN5 (Homo sapiens)
Go to Gene View: PARP2
Go to UniProtKB:  Q9UGN5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.150 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.640α = 90.00
b = 89.980β = 90.00
c = 100.500γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
Cootmodel building
HKL-2000data reduction
SCALAdata scaling
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR0GM1087282
American Cancer SocietyUnited StatesRSG0918301

Revision History 

  • Version 1.0: 2016-06-22
    Type: Initial release
  • Version 1.1: 2017-10-04
    Type: Author supporting evidence, Database references, Derived calculations