PDBe 5lpo

X-ray diffraction
1.42Å resolution

tRNA guanine Transglycosylase (TGT) in co-crystallized complex with 6-amino-2-(methylamino)-4-(2-((2R,3R,4R,5R)-3,4,5-trimethoxytetrahydrofuran-2-yl)ethyl)-1H-imidazo[4,5-g]quinazolin-8(7H)-one

Entry authors: Ehrmann FR, Heine A, Klebe G

Function and Biology Details

Reaction catalysed:
Guanine(34) in tRNA + 7-aminomethyl-7-carbaguanine = 7-aminomethyl-7-carbaguanine(34) in tRNA + guanine
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Queuine tRNA-ribosyltransferase Chain: A
Molecule details ›
Chain: A
Length: 388 amino acids
Theoretical weight: 43.07 KDa
Source organism: Zymomonas mobilis subsp. mobilis ZM4 = ATCC 31821
Expression system: Escherichia coli
  • Canonical: P28720 (Residues: 1-386; Coverage: 100%)
Gene names: ZMO0363, tgt
Sequence domains: Queuine tRNA-ribosyltransferase

Ligands and Environments

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: BESSY BEAMLINE 14.1
Spacegroup: C2
Unit cell:
a: 84.662Å b: 64.819Å c: 71.241Å
α: 90° β: 93.53° γ: 90°
R R work R free
0.134 0.132 0.163
Expression system: Escherichia coli