6AGO

Crystal structure of MRG15-ASH1L Histone methyltransferase complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.224 

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Literature

Structural Basis of MRG15-Mediated Activation of the ASH1L Histone Methyltransferase by Releasing an Autoinhibitory Loop.

Lee, Y.Yoon, E.Cho, S.Schmahling, S.Muller, J.Song, J.J.

(2019) Structure 27: 846

  • DOI: 10.1016/j.str.2019.01.016
  • Primary Citation of Related Structures:  
    6AGO

  • PubMed Abstract: 
  • Human ASH1L is the catalytic subunit of the conserved histone methyltransferase (HMTase) complex AMC that dimethylates lysine 36 in histone H3 (H3K36me2) to promote gene transcription in mammals and flies. Unlike AMC, ASH1L alone shows poor catalytic activity, because access to its substrate binding pocket is blocked by an autoinhibitory loop (AI loop) from the postSET domain ...

    Human ASH1L is the catalytic subunit of the conserved histone methyltransferase (HMTase) complex AMC that dimethylates lysine 36 in histone H3 (H3K36me2) to promote gene transcription in mammals and flies. Unlike AMC, ASH1L alone shows poor catalytic activity, because access to its substrate binding pocket is blocked by an autoinhibitory loop (AI loop) from the postSET domain. We report the crystal structure of the minimal catalytic active AMC complex containing ASH1L and its partner subunit MRG15. The structure reveals how binding of the MRG domain of MRG15 to a conserved FxLP motif in ASH1L results in the displacement of the AI loop to permit substrates to access the catalytic pocket of the ASH1L SET domain. Together, ASH1L activation by MRG15 therefore represents a delicate regulatory mechanism for how a cofactor activates an SET domain HMTase by releasing autoinhibition.


    Organizational Affiliation

    Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea. Electronic address: songj@kaist.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone-lysine N-methyltransferase ASH1LA, B256Homo 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
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Mortality factor 4 like 1C, D173Homo sapiensMutation(s): 0 
Gene Names: MORF4L1MRG15FWP006HSPC008HSPC061PP368
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBU8 (Homo sapiens)
Explore Q9UBU8 
Go to UniProtKB:  Q9UBU8
PHAROS:  Q9UBU8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.224 
  • Space Group: P 31 1 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.757α = 90
b = 115.757β = 90
c = 209.282γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-08-13 
  • Released Date: 2019-03-13 
  • Deposition Author(s): Lee, Y., Song, J.

Funding OrganizationLocationGrant Number
National Research Foundation (Korea)Korea, Republic OfNRF-2016R1A2B3006293
National Research Foundation (Korea)Korea, Republic OfNRF-2016K1A1A2912057

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-13
    Type: Initial release
  • Version 1.1: 2019-05-22
    Changes: Data collection, Database references