ISDA: 1ML9

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

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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

Primary Citation

Structure of the Neurospora SET domain protein DIM-5, a histone H3 lysine methyltransferase

Zhang, X, Tamaru, H, Khan, S.I, Horton, J.R, Keefe, L.J, Selker, E.U, Cheng, X.Show

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

Abstact

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