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: 2.00 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.161 

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This is version 1.4 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

  • DOI: 10.1016/s0014-5793(99)00793-0
  • Primary Citation of Related Structures:  
    1EFZ

  • 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 in Escherichia coli TGT leads to a dramatic reduction of enzymatic activity (Reuter, K ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRNA-GUANINE TRANSGLYCOSYLASEA386Zymomonas mobilisMutation(s): 1 
EC: 2.4.2.29
UniProt
Find proteins for P28720 (Zymomonas mobilis subsp. mobilis (strain ATCC 31821 / ZM4 / CP4))
Explore P28720 
Go to UniProtKB:  P28720
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PRF (Subject of Investigation/LOI)
Query on PRF

Download Ideal Coordinates CCD File 
C [auth A]7-DEAZA-7-AMINOMETHYL-GUANINE
C7 H9 N5 O
MEYMBLGOKYDGLZ-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.161 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.6α = 90
b = 65.04β = 96.25
c = 70.74γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-03-01
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-24
    Changes: Advisory, Database references
  • Version 1.4: 2020-08-19
    Changes: Database references, Derived calculations