6MLC image
Entry Detail
PDB ID:
6MLC
Keywords:
Title:
PHD6 domain of MLL3 in complex with histone H4
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2018-09-27
Release Date:
2018-10-24
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.21
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 6
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Histone-lysine N-methyltransferase 2C
Chain IDs:A, B, C, D
Chain Length:92
Number of Molecules:4
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Histone H4
Chain IDs:E, F
Chain Length:20
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation
Structural insights into trans-histone regulation of H3K4 methylation by unique histone H4 binding of MLL3/4.
Nat Commun 10 36 36 (2019)
PMID: 30604749 DOI: 10.1038/s41467-018-07906-3

Abstact

MLL3 and MLL4 are two closely related members of the SET1/MLL family of histone H3K4 methyltransferases and are responsible for monomethylating histone H3K4 on enhancers, which are essential in regulating cell-type-specific gene expression. Mutations of MLL3 or MLL4 have been reported in different types of cancer. Recently, the PHD domains of MLL3/4 have been reported to recruit the MLL3/4 complexes to their target genes by binding to histone H4 during the NT2/D1 stem cell differentiation. Here we show that an extended PHD domain (ePHD6) involving the sixth PHD domain and its preceding zinc finger in MLL3 and MLL4 specifically recognizes an H4H18-containing histone H4 fragment and that modifications of residues surrounding H4H18 modulate H4 binding to MLL3/4. Our in vitro methyltransferase assays and cellular experiments further reveal that the interaction between ePHD6 of MLL3/4 and histone H4 is required for their nucleosomal methylation activity and MLL4-mediated neuronal differentiation of NT2/D1 cells.

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