6INE

Crystal Structure of human ASH1L-MRG15 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.198 

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Literature

Structural Insights into Stimulation of Ash1L's H3K36 Methyltransferase Activity through Mrg15 Binding.

Hou, P.Huang, C.Liu, C.P.Yang, N.Yu, T.Yin, Y.Zhu, B.Xu, R.M.

(2019) Structure 27: 837

  • DOI: 10.1016/j.str.2019.01.015
  • Primary Citation of Related Structures:  
    6INE

  • PubMed Abstract: 
  • The evolutionarily conserved Trithorax group protein Ash1 is a SET domain histone methyltransferase that mono- and dimethylates lysine 36 of histone H3 (H3K36). Ash1 forms a complex with Mrg15 and Nurf55, and the binding of Mrg15 greatly stimulates the catalytic activity of Ash1, yet the underlying molecular mechanisms remain unknown ...

    The evolutionarily conserved Trithorax group protein Ash1 is a SET domain histone methyltransferase that mono- and dimethylates lysine 36 of histone H3 (H3K36). Ash1 forms a complex with Mrg15 and Nurf55, and the binding of Mrg15 greatly stimulates the catalytic activity of Ash1, yet the underlying molecular mechanisms remain unknown. Here we report the crystal structure of the tandem Mrg15-interacting and SET domains of human Ash1L in complex with Mrg15. Ash1L interacts with Mrg15 principally via a segment located N-terminal to the catalytic SET domain. Surprisingly, an autoinhibitory loop in the post-SET region of Ash1L is destabilized on Mrg15 binding despite no direct contact. Dynamics of the autoinhibitory loop can be attributed to subtle structural changes of the S-adenosylmethionine (SAM) binding pocket induced by Mrg15 binding, implicating a mechanism of conformational coupling between SAM and substrate binding sites. The findings broaden the understanding of regulation of H3K36 methyltransferases.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 10049, China. Electronic address: rmxu@ibp.ac.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone-lysine N-methyltransferase ASH1LA267Homo 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 protein 1B177Homo 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
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAM (Subject of Investigation/LOI)
Query on SAM

Download Ideal Coordinates CCD File 
F [auth A]S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
G [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A], D [auth A], E [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.198 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.12α = 90
b = 73.12β = 90
c = 202.818γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31521002
National Natural Science Foundation of ChinaChina31530037
Ministry of Science and Technology (China)China2015CB856200
Ministry of Science and Technology (China)China2017YFA0506600
Chinese Academy of SciencesChinaXDB08010100
Chinese Academy of SciencesChinaXDB08010103
Chinese Academy of SciencesChina2018127

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-20
    Type: Initial release
  • Version 1.1: 2019-05-22
    Changes: Data collection, Database references