1EFZ

MUTAGENESIS AND CRYSTALLOGRAPHIC STUDIES OF ZYMOMONAS MOBILIS TRNA-GUANINE TRANSGLYCOSYLASE TO ELUCIDATE THE ROLE OF SERINE 103 FOR ENZYMATIC ACTIVITY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Mutagenesis and crystallographic studies of Zymomonas mobilis tRNA-guanine transglycosylase to elucidate the role of serine 103 for enzymatic activity.

Gradler, U.Ficner, R.Garcia, G.A.Stubbs, M.T.Klebe, G.Reuter, K.

(1999) FEBS Lett. 454: 142-146


  • PubMed Abstract: 
  • The tRNA modifying enzyme tRNA-guanine transglycosylase (TGT) is involved in the exchange of guanine in the first position of the anticodon with preQ1 as part of the biosynthesis of the hypermodified base queuine (Q). Mutation of Ser90 to an alanine ...

    The tRNA modifying enzyme tRNA-guanine transglycosylase (TGT) is involved in the exchange of guanine in the first position of the anticodon with preQ1 as part of the biosynthesis of the hypermodified base queuine (Q). Mutation of Ser90 to an alanine in Escherichia coli TGT leads to a dramatic reduction of enzymatic activity (Reuter, K. et al. (1994) Biochemistry 33, 7041-7046). To further clarify the role of this residue in the catalytic center, we have mutated the corresponding Ser103 of the crystallizable Zymomonas mobilis TGT into alanine. The crystal structure of a TGT(S103A)/preQ1 complex combined with biochemical data presented in this paper suggest that Ser103 is essential for substrate orientation in the TGT reaction.


    Related Citations: 
    • Crystal Structure of tRNA-Guanine Transglycosylase: RNA Modification by Base Exchange.
      Romier, C.,Reuter, K.,Suck, D.,Ficner, R.
      (1996) Embo J. 15: 2850


    Organizational Affiliation

    Institut für Pharmazeutische Chemie, Philipps-Universität Marburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRNA-GUANINE TRANSGLYCOSYLASE
A
386Zymomonas mobilis subsp. mobilis (strain ATCC 31821 / ZM4 / CP4)Mutation(s): 1 
Gene Names: tgt
EC: 2.4.2.29
Find proteins for P28720 (Zymomonas mobilis subsp. mobilis (strain ATCC 31821 / ZM4 / CP4))
Go to UniProtKB:  P28720
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
PRF
Query on PRF

Download SDF File 
Download CCD File 
A
7-DEAZA-7-AMINOMETHYL-GUANINE
C7 H9 N5 O
MEYMBLGOKYDGLZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.161 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 90.600α = 90.00
b = 65.040β = 96.25
c = 70.740γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
SCALEPACKdata scaling
DENZOdata reduction
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-03-01
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-24
    Type: Advisory, Database references