1ML9 image
Deposition Date 2002-08-30
Release Date 2002-10-23
Last Version Date 2025-02-12
Entry Detail
PDB ID:
1ML9
Keywords:
TRANSFERASE
Title:
Structure of the Neurospora SET domain protein DIM-5, a histone lysine methyltransferase
Biological Source:
Source Organism:
Neurospora crassa (Taxon ID: 5141)
Host Organism:
Escherichia coli BL21
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.98 Å
R-Value Free:
0.25
R-Value Work:
0.20
Space Group:
P 21 21 21
1ML9 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H3 methyltransferase DIM-5
Chain IDs:A
Chain Length:302
Number of Molecules:1
Biological Source:Neurospora crassa
UniProt ID:Q8X225 Pfam ID:PF05033, PF00856
Ligand Molecules
UNK
ZN
Primary Citation
Structure of the Neurospora SET domain protein DIM-5, a histone H3 lysine methyltransferase
Cell(Cambridge,Mass.) 111 117 127 (2002)
PMID: 12372305 DOI: 10.1016/S0092-8674(02)00999-6

Abstact

AdoMet-dependent methylation of histones is part of the "histone code" that can profoundly influence gene expression. We describe the crystal structure of Neurospora DIM-5, a histone H3 lysine 9 methyltranferase (HKMT), determined at 1.98 A resolution, as well as results of biochemical characterization and site-directed mutagenesis of key residues. This SET domain protein bears no structural similarity to previously characterized AdoMet-dependent methyltransferases but includes notable features such as a triangular Zn3Cys9 zinc cluster in the pre-SET domain and a AdoMet binding site in the SET domain essential for methyl transfer. The structure suggests a mechanism for the methylation reaction and provides the structural basis for functional characterization of the HKMT family and the SET domain.

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Primary Citation of related structures
1ML9