8TXW

Cryo-EM structure of the human nucleosome core particle ubiquitylated at histone H2A K15 in complex with RNF168 (Class 2)

  • Classification: TRANSFERASE
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): Yes 

  • Deposited: 2023-08-24 Released: 2024-01-17 
  • Deposition Author(s): Hu, Q., Botuyan, M.V., Zhao, D., Cui, G., Mer, G.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Cancer Institute (NIH/NCI)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Mechanisms of RNF168 nucleosome recognition and ubiquitylation.

Hu, Q.Zhao, D.Cui, G.Bhandari, J.Thompson, J.R.Botuyan, M.V.Mer, G.

(2024) Mol Cell 84: 839-853.e12

  • DOI: https://doi.org/10.1016/j.molcel.2023.12.036
  • Primary Citation of Related Structures:  
    8SMW, 8SMX, 8SMY, 8SMZ, 8SN0, 8SN1, 8SN2, 8SN3, 8SN4, 8SN5, 8SN6, 8SN7, 8SN8, 8SN9, 8SNA, 8TXV, 8TXW, 8TXX, 8U13, 8U14, 8UPF, 8UQ8, 8UQ9, 8UQA, 8UQB, 8UQC, 8UQD, 8UQE

  • PubMed Abstract: 

    RNF168 plays a central role in the DNA damage response (DDR) by ubiquitylating histone H2A at K13 and K15. These modifications direct BRCA1-BARD1 and 53BP1 foci formation in chromatin, essential for cell-cycle-dependent DNA double-strand break (DSB) repair pathway selection. The mechanism by which RNF168 catalyzes the targeted accumulation of H2A ubiquitin conjugates to form repair foci around DSBs remains unclear. Here, using cryoelectron microscopy (cryo-EM), nuclear magnetic resonance (NMR) spectroscopy, and functional assays, we provide a molecular description of the reaction cycle and dynamics of RNF168 as it modifies the nucleosome and recognizes its ubiquitylation products. We demonstrate an interaction of a canonical ubiquitin-binding domain within full-length RNF168, which not only engages ubiquitin but also the nucleosome surface, clarifying how such site-specific ubiquitin recognition propels a signal amplification loop. Beyond offering mechanistic insights into a key DDR protein, our study aids in understanding site specificity in both generating and interpreting chromatin ubiquitylation.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine and Science, Rochester, MN 55905, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.1A,
D [auth E]
140Homo sapiensMutation(s): 0 
Gene Names: 
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Find proteins for P68431 (Homo sapiens)
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PHAROS:  P68431
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UniProt GroupP68431
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4B,
E [auth F]
107Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P62805 (Homo sapiens)
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PHAROS:  P62805
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UniProt GroupP62805
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B type 1-C/E/F/G/IC [auth D],
F [auth H]
128Homo sapiensMutation(s): 0 
Gene Names: 
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Find proteins for P62807 (Homo sapiens)
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PHAROS:  P62807
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UniProt GroupP62807
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
E3 ubiquitin-protein ligase RNF168I [auth K]580Homo sapiensMutation(s): 0 
Gene Names: RNF168
EC: 2.3.2.27
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYW5 (Homo sapiens)
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PHAROS:  Q8IYW5
GTEx:  ENSG00000163961 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Polyubiquitin-BJ [auth M]81Homo sapiensMutation(s): 0 
Gene Names: UBB
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Find proteins for P0CG47 (Homo sapiens)
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PHAROS:  P0CG47
GTEx:  ENSG00000170315 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A type 1-B/EK [auth C],
L [auth G]
119Homo sapiensMutation(s): 1 
Gene Names: H2AC4H2AFMHIST1H2ABH2AC8H2AFAHIST1H2AE
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Find proteins for P04908 (Homo sapiens)
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PHAROS:  P04908
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Entity ID: 4
MoleculeChains LengthOrganismImage
DNA (147-MER)G [auth I]147Homo sapiens
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Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (147-MER)H [auth J]147Homo sapiens
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.19.2-4158
RECONSTRUCTIONRELION3.0.7

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35 GM136262
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesR01 CA132878

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-17
    Type: Initial release
  • Version 1.1: 2024-01-31
    Changes: Database references
  • Version 1.2: 2024-03-20
    Changes: Database references
  • Version 1.3: 2024-10-09
    Changes: Data collection, Structure summary