4I51

Methyltransferase domain of HUMAN EUCHROMATIC HISTONE METHYLTRANSFERASE 1, mutant Y1211A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Defining efficient enzyme-cofactor pairs for bioorthogonal profiling of protein methylation.

Islam, K.Chen, Y.Wu, H.Bothwell, I.R.Blum, G.J.Zeng, H.Dong, A.Zheng, W.Min, J.Deng, H.Luo, M.

(2013) Proc Natl Acad Sci U S A 110: 16778-16783

  • DOI: 10.1073/pnas.1216365110
  • Primary Citation of Related Structures:  
    4I51

  • PubMed Abstract: 
  • Protein methyltransferase (PMT)-mediated posttranslational modification of histone and nonhistone substrates modulates stability, localization, and interacting partners of target proteins in diverse cellular contexts. These events play critical roles ...

    Protein methyltransferase (PMT)-mediated posttranslational modification of histone and nonhistone substrates modulates stability, localization, and interacting partners of target proteins in diverse cellular contexts. These events play critical roles in normal biological processes and are frequently deregulated in human diseases. In the course of identifying substrates of individual PMTs, bioorthogonal profiling of protein methylation (BPPM) has demonstrated its merits. In this approach, specific PMTs are engineered to process S-adenosyl-L-methionine (SAM) analogs as cofactor surrogates and label their substrates with distinct chemical modifications for target elucidation. Despite the proof-of-concept advancement of BPPM, few efforts have been made to explore its generality. With two cancer-relevant PMTs, EuHMT1 (GLP1/KMT1D) and EuHMT2 (G9a/KMT1C), as models, we defined the key structural features of engineered PMTs and matched SAM analogs that can render the orthogonal enzyme-cofactor pairs for efficient catalysis. Here we have demonstrated that the presence of sulfonium-β-sp(2) carbon and flexible, medium-sized sulfonium-δ-substituents are crucial for SAM analogs as BPPM reagents. The bulky cofactors can be accommodated by tailoring the conserved Y1211/Y1154 residues and nearby hydrophobic cavities of EuHMT1/2. Profiling proteome-wide substrates with BPPM allowed identification of >500 targets of EuHMT1/2 with representative targets validated using native EuHMT1/2 and SAM. This finding indicates that EuHMT1/2 may regulate many cellular events previously unrecognized to be modulated by methylation. The present work, therefore, paves the way to a broader application of the BPPM technology to profile methylomes of diverse PMTs and elucidate their downstream functions.


    Organizational Affiliation

    Molecular Pharmacology and Chemistry Program and Tri-Institutional Training Program in Chemical Biology, Memorial Sloan-Kettering Cancer Center, New York, NY 10065.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone-lysine N-methyltransferase EHMT1AB286Homo sapiensMutation(s): 1 
Gene Names: EHMT1EUHMTASE1GLPKIAA1876KMT1D
EC: 2.1.1 (PDB Primary Data), 2.1.1.43 (PDB Primary Data)
Find proteins for Q9H9B1 (Homo sapiens)
Explore Q9H9B1 
Go to UniProtKB:  Q9H9B1
NIH Common Fund Data Resources
PHAROS  Q9H9B1
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
UNKNOWN PEPTIDEK13N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
H3K9 NE-ALLYL PEPTIDECD9Homo sapiensMutation(s): 0 
Gene Names: 
Find proteins for P68431 (Homo sapiens)
Explore P68431 
Go to UniProtKB:  P68431
NIH Common Fund Data Resources
PHAROS  P68431
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

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A, B
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
GOL
Query on GOL

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A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
UNX
Query on UNX

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A, B
UNKNOWN ATOM OR ION
X
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
LDH
Query on LDH
C,DL-PEPTIDE LINKINGC8 H18 N2 O2LYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SAHIC50:  230   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.171 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.497α = 90
b = 83.8β = 90
c = 95.052γ = 90
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
Cootmodel building
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-19
    Type: Initial release
  • Version 1.1: 2013-12-04
    Changes: Database references
  • Version 1.2: 2014-04-02
    Changes: Source and taxonomy