6K1I

Human nucleosome core particle with gammaH2A.X variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

PARP1 exhibits enhanced association and catalytic efficiency with gamma H2A.X-nucleosome.

Sharma, D.De Falco, L.Padavattan, S.Rao, C.Geifman-Shochat, S.Liu, C.F.Davey, C.A.

(2019) Nat Commun 10: 5751-5751

  • DOI: 10.1038/s41467-019-13641-0
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The poly(ADP-ribose) polymerase, PARP1, plays a key role in maintaining genomic integrity by detecting DNA damage and mediating repair. γH2A.X is the primary histone marker for DNA double-strand breaks and PARP1 localizes to H2A.X-enriched chromatin ...

    The poly(ADP-ribose) polymerase, PARP1, plays a key role in maintaining genomic integrity by detecting DNA damage and mediating repair. γH2A.X is the primary histone marker for DNA double-strand breaks and PARP1 localizes to H2A.X-enriched chromatin damage sites, but the basis for this association is not clear. We characterize the kinetics of PARP1 binding to a variety of nucleosomes harbouring DNA double-strand breaks, which reveal that PARP1 associates faster with (γ)H2A.X- versus H2A-nucleosomes, resulting in a higher affinity for the former, which is maximal for γH2A.X-nucleosome that is also the activator eliciting the greatest poly-ADP-ribosylation catalytic efficiency. The enhanced activities with γH2A.X-nucleosome coincide with increased accessibility of the DNA termini resulting from the H2A.X-Ser139 phosphorylation. Indeed, H2A- and (γ)H2A.X-nucleosomes have distinct stability characteristics, which are rationalized by mutational analysis and (γ)H2A.X-nucleosome core crystal structures. This suggests that the γH2A.X epigenetic marker directly facilitates DNA repair by stabilizing PARP1 association and promoting catalysis.


    Organizational Affiliation

    NTU Institute of Structural Biology, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore.,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore. davey@ntu.edu.sg.,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.,NTU Institute of Structural Biology, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore. davey@ntu.edu.sg.,Department of Biophysics, National Institute of Mental Health and Neurosciences, Bangalore, 560029, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone H3.1
A, E
139Homo sapiensMutation(s): 0 
Gene Names: H3C1, H3C2, H3C3, H3C4, H3C6, H3C7, H3C8, H3C10, H3C11, H3C12 (H3FA, HIST1H3A, H3FL, HIST1H3B, H3FC HIST1H3C, H3FB, HIST1H3D, H3FD, HIST1H3E, H3FI, HIST1H3F, H3FH, HIST1H3G, H3FK, HIST1H3H, H3FF, HIST1H3I, H3FJ, HIST1H3J)
Find proteins for P68431 (Homo sapiens)
Go to UniProtKB:  P68431
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H4
B, F
106Homo sapiensMutation(s): 0 
Gene Names: H4C1, H4C2, H4C3, H4C4, H4C5, H4C6, H4C8, H4C9, H4C11, H4C12, H4C13, H4C14, H4C15, H4-16 (H4/A, H4FA, HIST1H4A, H4/I, H4FI, HIST1H4B, H4/G, H4FG, HIST1H4C, H4/B, H4FB, HIST1H4D, H4/J, H4FJ, HIST1H4E, H4/C, H4FC, HIST1H4F, H4/H, H4FH, HIST1H4H, H4/M, H4FM, HIST1H4I, H4/E, H4FE, HIST1H4J, H4/D, H4FD, HIST1H4K, H4/K, H4FK, HIST1H4L, H4/N, H4F2, H4FN, HIST2H4, HIST2H4A, H4/O, H4FO, HIST2H4B, HIST4H4)
Find proteins for P62805 (Homo sapiens)
Go to UniProtKB:  P62805
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Histone H2AX
C, G
146Homo sapiensMutation(s): 0 
Gene Names: H2AFX (H2AX)
Find proteins for P16104 (Homo sapiens)
Go to Gene View: H2AFX
Go to UniProtKB:  P16104
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Histone H2B type 1-J
D, H
129Homo sapiensMutation(s): 0 
Gene Names: H2BC11 (H2BFR, HIST1H2BJ)
Find proteins for P06899 (Homo sapiens)
Go to UniProtKB:  P06899
Entity ID: 5
MoleculeChainsLengthOrganism
DNA (147-MER)I147Homo sapiens
Entity ID: 6
MoleculeChainsLengthOrganism
DNA (147-MER)J147Homo sapiens
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
I, J
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
MN
Query on MN

Download SDF File 
Download CCD File 
E, I, J
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
D, G
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.218 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 102.850α = 90.00
b = 109.420β = 90.00
c = 181.470γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
iMOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Education (Singapore)Singapore--

Revision History 

  • Version 1.0: 2020-01-15
    Type: Initial release