ISDA

Deposition Date 2011-05-30

Release Date 2011-07-06

Last Version Date 2024-11-20

Entry Detail

PDB ID:

3S8P

Keywords:

TRANSFERASE

Title:

Crystal Structure of the SET Domain of Human Histone-Lysine N-Methyltransferase SUV420H1 In Complex With S-Adenosyl-L-Methionine

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.85 Å

R-Value Free:

0.21

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Histone-lysine N-methyltransferase SUV420H1
Gene (Uniprot):KMT5B
Chain IDs:A, B
Chain Length:273
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:Q4FZB7 Pfam ID:PF00856

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
MSE	A	MET	SELENOMETHIONINE

Ligand Molecules

SAM

Primary Citation

Crystal structures of the human histone H4K20 methyltransferases SUV420H1 and SUV420H2.

Wu, H, Siarheyeva, A, Zeng, H, Lam, R, Dong, A, Wu, X.H, Li, Y, Schapira, M, Vedadi, M, Min, J.Show

Febs Lett. 587 3859 3868 (2013)

PMID: 24396869

Abstact

SUV420H1 and SUV420H2 are two highly homologous enzymes that methylate lysine 20 of histone H4 (H4K20), a mark that has been implicated in transcriptional regulation. In this study, we present the high-resolution crystal structures of human SUV420H1 and SUV420H2 in complex with SAM, and report their substrate specificity. Both methyltransferases have a unique N-terminal domain and Zn-binding post-SET domain, and prefer the monomethylated histone H4K20 as a substrate in vitro. No histone H4K20 trimethylation activity was detected by our radioactivity-based assay for either enzyme, consistent with the presence of a conserved serine residue that forms a hydrogen bond with the target lysine side-chain and limits the methylation level.

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Primary Citation of related structures