6K1K

Human nucleosome core particle with H2A.X S139E variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 

wwPDB Validation 3D Report Full Report



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:  
    6IPU, 6K1I, 6K1K, 6K1J, 6JXD

  • 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. davey@ntu.edu.sg.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H3.1A, E139Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P68431 (Homo sapiens)
Explore P68431 
Go to UniProtKB:  P68431
NIH Common Fund Data Resources
PHAROS  P68431
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H4B, F106Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P62805 (Homo sapiens)
Explore P62805 
Go to UniProtKB:  P62805
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PHAROS  P62805
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2AXC, G146Homo sapiensMutation(s): 1 
Gene Names: H2AFXH2AX
Find proteins for P16104 (Homo sapiens)
Explore P16104 
Go to UniProtKB:  P16104
NIH Common Fund Data Resources
PHAROS  P16104
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Histone H2B type 1-JD, H129Homo sapiensMutation(s): 0 
Gene Names: HIST1H2BJH2BFRH2BC11
Find proteins for P06899 (Homo sapiens)
Explore P06899 
Go to UniProtKB:  P06899
NIH Common Fund Data Resources
PHAROS  P06899
Protein Feature View
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsLengthOrganismImage
DNA (145-MER)I145Homo sapiens
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Entity ID: 6
MoleculeChainsLengthOrganismImage
DNA (145-MER)J145Homo sapiens
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

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

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

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.95α = 90
b = 109.46β = 90
c = 183.38γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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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