3OPE

Structural Basis of Auto-inhibitory mechanism of Histone methyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.235 

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This is version 1.3 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
  • Primary Citation of Related Structures:  
    3OPE

  • 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 the crystal structure of the human ASH1L catalytic domain, showing its substrate binding pocket blocked by a loop from the post-SET domain ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Probable histone-lysine N-methyltransferase ASH1LA, B222Homo sapiensMutation(s): 0 
Gene Names: ASH1LKIAA1420KMT2H
EC: 2.1.1.43 (PDB Primary Data), 2.1.1 (UniProt), 2.1.1.359 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NR48 (Homo sapiens)
Explore Q9NR48 
Go to UniProtKB:  Q9NR48
PHAROS:  Q9NR48
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.235 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.53α = 90
b = 59.53β = 90
c = 233.804γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-08-14
    Changes: Database references
  • Version 1.3: 2019-12-11
    Changes: Advisory, Database references, Derived calculations