3S32

Crystal structure of Ash2L N-terminal domain

• PDB DOI: https://doi.org/10.2210/pdb3S32/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-05-17 Released: 2011-06-08 
• Deposition Author(s): Sarvan, S., Avdic, V., Tremblay, V., Chaturvedi, C.-P., Zhang, P., Lanouette, S., Blais, A., Brunzelle, J.S., Brand, M., Couture, J.-F.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.45 Å
• R-Value Free: 0.263 
• R-Value Work: 0.225 
• R-Value Observed: 0.227 

Literature

Crystal structure of the trithorax group protein ASH2L reveals a forkhead-like DNA binding domain.

Sarvan, S., Avdic, V., Tremblay, V., Chaturvedi, C.P., Zhang, P., Lanouette, S., Blais, A., Brunzelle, J.S., Brand, M., Couture, J.F.

(2011) Nat Struct Mol Biol 18: 857-859

• PubMed: 21642971 
• DOI: https://doi.org/10.1038/nsmb.2093
• Primary Citation of Related Structures:  
  3S32


• PubMed Abstract: 
  

  Absent, small or homeotic discs-like 2 (ASH2L) is a trithorax group (TrxG) protein and a regulatory subunit of the SET1 family of lysine methyltransferases. Here we report that ASH2L binds DNA using a forkhead-like helix-wing-helix (HWH) domain. In vivo, the ASH2L HWH domain is required for binding to the β-globin locus control region, histone H3 Lys4 (H3K4) trimethylation and maximal expression of the β-globin gene (Hbb-1), validating the functional importance of the ASH2L DNA binding domain.

---

Organizational Affiliation: 

Ottawa Institute of Systems Biology, Department of Biochemistry, University of Ottawa, Ottawa, Ontario, Canada.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 22.1 kDa 
• Atom Count: 1,306 
• Modelled Residue Count: 161 
• Deposited Residue Count: 191 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Set1/Ash2 histone methyltransferase complex subunit ASH2	A	191	Homo sapiens	Mutation(s): 0  Gene Names: ASH2L, ASH2L1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBL3 (Homo sapiens) Explore Q9UBL3  Go to UniProtKB:  Q9UBL3
PHAROS:  Q9UBL3 GTEx:  ENSG00000129691

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.45 Å
• R-Value Free: 0.263 
• R-Value Work: 0.225 
• R-Value Observed: 0.227 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.893	α = 90
b = 49.893	β = 90
c = 167.542	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHENIX	model building
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-06-08 
Deposition Author(s): Sarvan, S., Avdic, V., Tremblay, V., Chaturvedi, C.-P., Zhang, P., Lanouette, S., Blais, A., Brunzelle, J.S., Brand, M., Couture, J.-F.

Revision History  

• Version 1.0: 2011-06-08
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2012-01-11
  Changes: Database references