6H45

crystal structure of the human TGT catalytic subunit QTRT1 in complex with queuine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal Structure of the Human tRNA Guanine Transglycosylase Catalytic Subunit QTRT1.

Johannsson, S.Neumann, P.Ficner, R.

(2018) Biomolecules 8: --

  • DOI: 10.3390/biom8030081
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • RNA modifications have been implicated in diverse and important roles in all kingdoms of life with over 100 of them present on tRNAs. A prominent modification at the wobble base of four tRNAs is the 7-deaza-guanine derivative queuine which substitute ...

    RNA modifications have been implicated in diverse and important roles in all kingdoms of life with over 100 of them present on tRNAs. A prominent modification at the wobble base of four tRNAs is the 7-deaza-guanine derivative queuine which substitutes the guanine at position 34. This exchange is catalyzed by members of the enzyme class of tRNA guanine transglycosylases (TGTs). These enzymes incorporate guanine substituents into tRNA Asp , tRNA Asn tRNA His , and tRNA Tyr in all kingdoms of life. In contrast to the homodimeric bacterial TGT, the active eukaryotic TGT is a heterodimer in solution, comprised of a catalytic QTRT1 subunit and a noncatalytic QTRT2 subunit. Bacterial TGT enzymes, that incorporate a queuine precursor, have been identified or proposed as virulence factors for infections by pathogens in humans and therefore are valuable targets for drug design. To date no structure of a eukaryotic catalytic subunit is reported, and differences to its bacterial counterpart have to be deducted from sequence analysis and models. Here we report the first crystal structure of a eukaryotic QTRT1 subunit and compare it to known structures of the bacterial TGT and murine QTRT2. Furthermore, we were able to determine the crystal structure of QTRT1 in complex with the queuine substrate.


    Organizational Affiliation

    Department of Molecular Structural Biology, Institute of Microbiology and Genetics, GZMB, Georg-August-University Göttingen, 37077 Göttingen, Germany. rficner@uni-goettingen.de.,Department of Molecular Structural Biology, Institute of Microbiology and Genetics, GZMB, Georg-August-University Göttingen, 37077 Göttingen, Germany. sjohann1@gwdg.de.,Department of Molecular Structural Biology, Institute of Microbiology and Genetics, GZMB, Georg-August-University Göttingen, 37077 Göttingen, Germany. pneuman2@gwdg.de.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Queuine tRNA-ribosyltransferase catalytic subunit 1
A, B
392Homo sapiensMutation(s): 0 
Gene Names: QTRT1 (TGT, TGUT)
EC: 2.4.2.29
Find proteins for Q9BXR0 (Homo sapiens)
Go to Gene View: QTRT1
Go to UniProtKB:  Q9BXR0
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

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A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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

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A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
QEI
Query on QEI

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A, B
2-amino-5-({[(1S,4S,5R)-4,5-dihydroxycyclopent-2-en-1-yl]amino}methyl)-3,7-dihydro-4H-pyrrolo[2,3-d]pyrimidin-4-one
queuine
C12 H15 N5 O3
WYROLENTHWJFLR-ACLDMZEESA-N
 Ligand Interaction
BR
Query on BR

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A, B
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
GGL
Query on GGL

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B
GAMMA-L-GLUTAMIC ACID
L-GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
OCS
Query on OCS
A, B
L-PEPTIDE LINKINGC3 H7 N O5 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.201 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 127.500α = 90.00
b = 158.860β = 108.19
c = 47.620γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XSCALEdata scaling
XDSdata reduction
PDB_EXTRACTdata extraction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanySPP 1784

Revision History 

  • Version 1.0: 2018-09-05
    Type: Initial release