4PIP

Engineered EgtD variant EgtD-M252V,E282A in complex with tryptophan and SAH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Ergothioneine Biosynthetic Methyltransferase EgtD Reveals the Structural Basis of Aromatic Amino Acid Betaine Biosynthesis.

Vit, A.Misson, L.Blankenfeldt, W.Seebeck, F.P.

(2015) Chembiochem 16: 119-125

  • DOI: https://doi.org/10.1002/cbic.201402522
  • Primary Citation of Related Structures:  
    4PIM, 4PIN, 4PIO, 4PIP

  • PubMed Abstract: 

    Ergothioneine is an N-α-trimethyl-2-thiohistidine derivative that occurs in human, plant, fungal, and bacterial cells. Biosynthesis of this redox-active betaine starts with trimethylation of the α-amino group of histidine. The three consecutive methyl transfers are catalyzed by the S-adenosylmethionine-dependent methyltransferase EgtD. Three crystal structures of this enzyme in the absence and in the presence of N-α-dimethylhistidine and S-adenosylhomocysteine implicate a preorganized array of hydrophilic interactions as the determinants for substrate specificity and apparent processivity. We identified two active site mutations that change the substrate specificity of EgtD 10(7)-fold and transform the histidine-methyltransferase into a proficient tryptophan-methyltransferase. Finally, a genomic search for EgtD homologues in fungal genomes revealed tyrosine and tryptophan trimethylation activity as a frequent trait in ascomycetous and basidomycetous fungi.


  • Organizational Affiliation

    3Structure and Function of Proteins, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig (Germany); Previous address: Department of Biochemistry, University of Bayreuth, Universitätsstrasse 30, 95447 Bayreuth (Germany).


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histidine-specific methyltransferase EgtD
A, B, C, D
323Mycolicibacterium smegmatisMutation(s): 6 
Gene Names: egtDMSMEG_6247MSMEI_6086
EC: 2.1.1.44
UniProt
Find proteins for A0R5M8 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Explore A0R5M8 
Go to UniProtKB:  A0R5M8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0R5M8
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

Download Ideal Coordinates CCD File 
F [auth A],
H [auth B],
L [auth C],
O [auth D]
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
TRP
Query on TRP

Download Ideal Coordinates CCD File 
E [auth A],
G [auth B],
K [auth C],
N [auth D]
TRYPTOPHAN
C11 H12 N2 O2
QIVBCDIJIAJPQS-VIFPVBQESA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
J [auth C]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG
Query on MG

Download Ideal Coordinates CCD File 
I [auth B],
M [auth C]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.045α = 90
b = 67.634β = 109.24
c = 112.125γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
XDSdata scaling
PDB_EXTRACTdata extraction
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National FoundationSwitzerland147005

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-03
    Type: Initial release
  • Version 1.1: 2015-01-07
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Advisory, Derived calculations, Other, Refinement description, Source and taxonomy
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description