Structural and functional investigation of tRNA guanine transglycosylase

Katharina Sievers, University of Göttingen Dissertation - (2023) URL

SASDRB8 – Human tRNA guanine transglycosylase heterodimer

Queuine tRNA-ribosyltransferase catalytic subunit 1
Queuine tRNA-ribosyltransferase accessory subunit 2
MWexperimental 74 kDa
MWexpected 91 kDa
VPorod 127 nm3
log I(s) 7.08×103 7.08×102 7.08×101 7.08×100
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 small angle scattering data  s, nm-1
ln I(s)
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 Guinier plot ln 7.08×103 Rg: 3.3 nm 0 (3.3 nm)-2 s2
(sRg)2I(s)/I(0)
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 Kratky plot 1.104 0 3 sRg
p(r)
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 pair distance distribution function Rg: 3.3 nm 0 Dmax: 11.4 nm

Data validation


Fits and models


log I(s)
 s, nm-1
Human tRNA guanine transglycosylase heterodimer Rg histogram Rg, nm
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model

log I(s)
 s, nm-1
Human tRNA guanine transglycosylase heterodimer Rg histogram Rg, nm
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model
Queuine tRNA-ribosyltransferase catalytic subunit 1 Queuine tRNA-ribosyltransferase accessory subunit 2 EOM/RANCH model

Synchrotron SAXS data from solutions of tRNA guanine transglycosylase in 20 mM HEPES, 100 mM NaCl, 3% (w/v) glycerol, pH 7.5 were collected on the EMBL P12 beam line at PETRA III (DESY, Hamburg, Germany) using a Pilatus 6M detector at a sample-detector distance of 3 m and at a wavelength of λ = 0.124 nm (I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle). In-line size-exclusion chromatography (SEC) SAS was employed. The SEC parameters were as follows: A 75.00 μl sample at 10 mg/ml was injected at a 0.50 ml/min flow rate onto a GE Superdex 200 Increase 10/300 column at 20°C. 3600 successive 1 second frames were collected through the SEC elution. The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.

Queuine tRNA-ribosyltransferase catalytic subunit 1
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   44.2 kDa
 
UniProt   Q9BXR0 (1-403)
Sequence   FASTA
 
Queuine tRNA-ribosyltransferase accessory subunit 2
Mol. type   Protein
Organism   Homo sapiens
Olig. state   Monomer
Mon. MW   46.7 kDa
 
UniProt   Q9H974 (1-415)
Sequence   FASTA