ISDA

Entry Detail

PDB ID:

1XQH

Keywords:

TRANSFERASE

Title:

Crystal structure of a ternary complex of the methyltransferase SET9 (also known as SET7/9) with a P53 peptide and SAH

Biological Source:

Source Organism:

Homo sapiens,

Host Organism:

Escherichia coli BL21(DE3)

PDB Version:

Deposition Date:

2004-10-12

Release Date:

2004-11-23

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.75 Å

R-Value Free:

0.22

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Histone-lysine N-methyltransferase, H3 lysine-4 specific
Chain IDs:A, C (auth: E)
Chain Length:264
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:Q8WTS6 Pfam ID:PF22648, PF00856

Protein Blast

Polymer Type:polypeptide(L)
Description:9-mer peptide from tumor protein p53
Chain IDs:B, D (auth: F)
Chain Length:10
Number of Molecules:2
Biological Source:

UniProt ID:P04637

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
MLZ	B	LYS	N-METHYL-LYSINE

Ligand Molecules

SAH

Primary Citation

Regulation of p53 activity through lysine methylation

Chuikov, S, Kurash, J.K, Wilson, J.R, Xiao, B, Justin, N, Ivanov, G.S, McKinney, K, Tempst, P, Prives, C, Gamblin, S.J, Barlev, N.A, Reinberg, D.Show

Nature 432 353 360 (2004)

PMID: 15525938 DOI: 10.1038/nature03117

Abstact

p53 is a tumour suppressor that regulates the cellular response to genotoxic stresses. p53 is a short-lived protein and its activity is regulated mostly by stabilization via different post-translational modifications. Here we report a novel mechanism of p53 regulation through lysine methylation by Set9 methyltransferase. Set9 specifically methylates p53 at one residue within the carboxyl-terminus regulatory region. Methylated p53 is restricted to the nucleus and the modification positively affects its stability. Set9 regulates the expression of p53 target genes in a manner dependent on the p53-methylation site. The crystal structure of a ternary complex of Set9 with a p53 peptide and the cofactor product S-adenosyl-l-homocysteine (AdoHcy) provides the molecular basis for recognition of p53 by this lysine methyltransferase.

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Protein

Chemical

Disease

Primary Citation of related structures