3OPE

Structural Basis of Auto-inhibitory mechanism of Histone methyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the human histone methyltransferase ASH1L catalytic domain and its implications for the regulatory mechanism

An, S.Yeo, K.J.Jeon, Y.H.Song, J.

(2011) J.Biol.Chem. 286: 8369-8374

  • DOI: 10.1074/jbc.M110.203380

  • PubMed Abstract: 
  • Absent, small, or homeotic disc1 (Ash1) is a trithorax group histone methyltransferase that is involved in gene activation. Although there are many known histone methyltransferases, their regulatory mechanisms are poorly understood. Here, we present ...

    Absent, small, or homeotic disc1 (Ash1) is a trithorax group histone methyltransferase that is involved in gene activation. Although there are many known histone methyltransferases, their regulatory mechanisms are poorly understood. Here, we present the crystal structure of the human ASH1L catalytic domain, showing its substrate binding pocket blocked by a loop from the post-SET domain. In this configuration, the loop limits substrate access to the active site. Mutagenesis of the loop stimulates ASH1L histone methyltransferase activity, suggesting that ASH1L activity may be regulated through the loop from the post-SET domain. In addition, we show that human ASH1L specifically methylates histone H3 Lys-36. Our data implicate that there may be a regulatory mechanism of ASH1L histone methyltransferases.


    Organizational Affiliation

    Structural Biology Laboratory of Epigenetics, Department of Biological Sciences, Graduate school of Nanoscience and Technology (World Class University), KI for the BioCentury, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon 305-701.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable histone-lysine N-methyltransferase ASH1L
A, B
222Homo sapiensMutation(s): 0 
Gene Names: ASH1L (KIAA1420, KMT2H)
EC: 2.1.1.43
Find proteins for Q9NR48 (Homo sapiens)
Go to Gene View: ASH1L
Go to UniProtKB:  Q9NR48
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SAM
Query on SAM

Download SDF File 
Download CCD File 
A, B
S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.235 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 59.530α = 90.00
b = 59.530β = 90.00
c = 233.804γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SOLVEphasing
CNSrefinement
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2010-08-31 
  • Released Date: 2011-01-12 
  • Deposition Author(s): An, S., Song, J.

Revision History 

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-08-14
    Type: Database references