ISDA

Deposition Date 2011-05-02

Release Date 2011-06-22

Last Version Date 2024-11-06

Entry Detail

PDB ID:

3RSN

Keywords:

TRANSCRIPTION

Title:

Crystal Structure of the N-terminal region of Human Ash2L

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.10 Å

R-Value Free:

0.25

R-Value Work:

0.21

R-Value Observed:

0.21

Space Group:

P 31 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Set1/Ash2 histone methyltransferase complex subunit ASH2
Gene (Uniprot):ASH2L
Chain IDs:A
Chain Length:177
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:Q9UBL3 Pfam ID:PF21257, PF21198

Modified Residue

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

Ligand Molecules

Primary Citation

Crystal structure of the N-terminal region of human Ash2L shows a winged-helix motif involved in DNA binding.

Chen, Y, Wan, B, Wang, K.C, Cao, F, Yang, Y, Protacio, A, Dou, Y, Chang, H.Y, Lei, M.Show

Embo Rep. 12 797 803 (2011)

PMID: 21660059 DOI: 10.1038/embor.2011.101

Abstact

Ash2L is a core component of the MLL family histone methyltransferases and has an important role in regulating the methylation of histone H3 on lysine 4. Here, we report the crystal structure of the N-terminal domain of Ash2L and reveal a new function of Ash2L. The structure shows that Ash2L contains an atypical PHD finger that does not have histone tail-binding activity. Unexpectedly, the structure shows a previously unrecognized winged-helix motif that directly binds to DNA. The DNA-binding-deficient mutants of Ash2L reduced Ash2L localization to the HOX locus. Strikingly, a single mutation in Ash2L(WH) (K131A) breaks the chromatin domain boundary, suggesting that Ash2L also has a role in chromosome demarcation.

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Disease

Primary Citation of related structures