6PWX

Cryo-EM structure of RbBP5 bound to the nucleosome


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM structure of the human MLL1 core complex bound to the nucleosome.

Park, S.H.Ayoub, A.Lee, Y.T.Xu, J.Kim, H.Zheng, W.Zhang, B.Sha, L.An, S.Zhang, Y.Cianfrocco, M.A.Su, M.Dou, Y.Cho, U.S.

(2019) Nat Commun 10: 5540-5540

  • DOI: https://doi.org/10.1038/s41467-019-13550-2
  • Primary Citation of Related Structures:  
    6PWV, 6PWW, 6PWX

  • PubMed Abstract: 

    Mixed lineage leukemia (MLL) family histone methyltransferases are enzymes that deposit histone H3 Lys4 (K4) mono-/di-/tri-methylation and regulate gene expression in mammals. Despite extensive structural and biochemical studies, the molecular mechanisms whereby the MLL complexes recognize histone H3K4 within nucleosome core particles (NCPs) remain unclear. Here we report the single-particle cryo-electron microscopy (cryo-EM) structure of the NCP-bound human MLL1 core complex. We show that the MLL1 core complex anchors to the NCP via the conserved RbBP5 and ASH2L, which interact extensively with nucleosomal DNA and the surface close to the N-terminal tail of histone H4. Concurrent interactions of RbBP5 and ASH2L with the NCP uniquely align the catalytic MLL1 SET domain at the nucleosome dyad, thereby facilitating symmetrical access to both H3K4 substrates within the NCP. Our study sheds light on how the MLL1 complex engages chromatin and how chromatin binding promotes MLL1 tri-methylation activity.


  • Organizational Affiliation

    Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan, 48109, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Retinoblastoma-binding protein 5538Homo sapiensMutation(s): 0 
Gene Names: RBBP5RBQ3
UniProt & NIH Common Fund Data Resources
Find proteins for Q15291 (Homo sapiens)
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Go to UniProtKB:  Q15291
PHAROS:  Q15291
GTEx:  ENSG00000117222 
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UniProt GroupQ15291
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.2B [auth G],
F [auth K]
136Xenopus laevisMutation(s): 1 
UniProt
Find proteins for P84233 (Xenopus laevis)
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UniProt GroupP84233
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H4C [auth H],
K [auth L]
103Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P62799 (Xenopus laevis)
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2A type 1D [auth I],
G [auth M]
129Xenopus laevisMutation(s): 0 
UniProt
Find proteins for P06897 (Xenopus laevis)
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UniProt GroupP06897
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H2B 1.1E [auth J],
H [auth N]
123Xenopus laevisMutation(s): 1 
UniProt
Find proteins for P02281 (Xenopus laevis)
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UniProt GroupP02281
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Entity ID: 6
MoleculeChains LengthOrganismImage
DNA (146-MER)I [auth O]147synthetic construct
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Entity ID: 7
MoleculeChains LengthOrganismImage
DNA (146-MER)J [auth P]147synthetic construct
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United StatesDK111465
National Research Foundation (NRF, Korea)Korea, Republic OfNRF-2015M3D3A1A01064876

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-18
    Type: Initial release
  • Version 1.1: 2024-03-20
    Changes: Data collection, Database references