7R1D image
Entry Detail
PDB ID:
7R1D
EMDB ID:
Keywords:
Title:
Structure of MuvB complex
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2022-02-02
Release Date:
2022-08-10
Method Details:
Experimental Method:
Resolution:
3.50 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Histone-binding protein RBBP4
Chain IDs:B (auth: A)
Chain Length:425
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Protein lin-37 homolog
Chain IDs:C (auth: B)
Chain Length:255
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Protein lin-9 homolog
Chain IDs:A (auth: C)
Chain Length:542
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Structure of a nucleosome-bound MuvB transcription factor complex reveals DNA remodelling.
Nat Commun 13 5075 5075 (2022)
PMID: 36038598 DOI: 10.1038/s41467-022-32798-9

Abstact

Genes encoding the core cell cycle machinery are transcriptionally regulated by the MuvB family of protein complexes in a cell cycle-specific manner. Complexes of MuvB with the transcription factors B-MYB and FOXM1 activate mitotic genes during cell proliferation. The mechanisms of transcriptional regulation by these complexes are still poorly characterised. Here, we combine biochemical analysis and in vitro reconstitution, with structural analysis by cryo-electron microscopy and cross-linking mass spectrometry, to functionally examine these complexes. We find that the MuvB:B-MYB complex binds and remodels nucleosomes, thereby exposing nucleosomal DNA. This remodelling activity is supported by B-MYB which directly binds the remodelled DNA. Given the remodelling activity on the nucleosome, we propose that the MuvB:B-MYB complex functions as a pioneer transcription factor complex. In this work, we rationalise prior biochemical and cellular studies and provide a molecular framework of interactions on a protein complex that is key for cell cycle regulation.

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Primary Citation of related structures