4Q8T

tRNA-Guanine Transglycosylase (TGT) in Complex with 6-Amino-2-[(2-phenylethyl)amino]-1H,7H,8H-imidazo[4,5-g]quinazolin-8-one

• PDB DOI: https://doi.org/10.2210/pdb4Q8T/pdb

• Classification: Transferase/transferase inhibitor
• Organism(s): Zymomonas mobilis subsp. mobilis ZM4 = ATCC 31821
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2014-04-28 Released: 2015-05-20 
• Deposition Author(s): Neeb, M., Heine, A., Klebe, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.154 
• R-Value Work: 0.138 
• R-Value Observed: 0.139 

Starting Model: experimental

Literature

Addressing a New Subpocket of TGT by Elongated 2-Amino-lin-benzoguanines

Neeb, M., Hohn, C., Heine, A., Diederich, F., Klebe, G.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 43.62 kDa 
• Atom Count: 3,254 
• Modelled Residue Count: 369 
• Deposited Residue Count: 386 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Queuine tRNA-ribosyltransferase	A	386	Zymomonas mobilis subsp. mobilis ZM4 = ATCC 31821	Mutation(s): 0  Gene Names: tgt, ZMO0363 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

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
2YV	C [auth A]	6-amino-2-[(2-phenylethyl)amino]-1,7-dihydro-8H-imidazo[4,5-g]quinazolin-8-one C17 H16 N6 O IGMWKNNADHYQOB-UHFFFAOYSA-N
GOL	D [auth A], E [auth A], F [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CL	G [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Binding Affinity Annotations
ID	Source	Binding Affinity
2YV	BindingDB:  4Q8T	Ki: 10 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.154 
• R-Value Work: 0.138 
• R-Value Observed: 0.139 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 90.233	α = 90
b = 64.635	β = 93.16
c = 70.964	γ = 90

Software Package:

Software Name	Purpose
MAR345dtb	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-05-20 
Deposition Author(s): Neeb, M., Heine, A., Klebe, G.

Revision History  

• Version 1.0: 2015-05-20
  Type: Initial release
  
• Version 1.1: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description