RNA Editing TUTase 1 from Trypanosoma brucei

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


RNA Editing TUTase 1: structural foundation of substrate recognition, complex interactions and drug targeting.

Rajappa-Titu, L.Suematsu, T.Munoz-Tello, P.Long, M.Demir, O.Cheng, K.J.Stagno, J.R.Luecke, H.Amaro, R.E.Aphasizheva, I.Aphasizhev, R.Thore, S.

(2016) Nucleic Acids Res 44: 10862-10878

  • DOI: https://doi.org/10.1093/nar/gkw917
  • Primary Citation of Related Structures:  
    5HZD, 5I49, 5IDO, 5KAL

  • PubMed Abstract: 

    Terminal uridyltransferases (TUTases) execute 3' RNA uridylation across protists, fungi, metazoan and plant species. Uridylation plays a particularly prominent role in RNA processing pathways of kinetoplastid protists typified by the causative agent of African sleeping sickness, Trypanosoma brucei In mitochondria of this pathogen, most mRNAs are internally modified by U-insertion/deletion editing while guide RNAs and rRNAs are U-tailed. The founding member of TUTase family, RNA editing TUTase 1 (RET1), functions as a subunit of the 3' processome in uridylation of gRNA precursors and mature guide RNAs. Along with KPAP1 poly(A) polymerase, RET1 also participates in mRNA translational activation. RET1 is divergent from human TUTases and is essential for parasite viability in the mammalian host and the insect vector. Given its robust in vitro activity, RET1 represents an attractive target for trypanocide development. Here, we report high-resolution crystal structures of the RET1 catalytic core alone and in complex with UTP analogs. These structures reveal a tight docking of the conserved nucleotidyl transferase bi-domain module with a RET1-specific C2H2 zinc finger and RNA recognition (RRM) domains. Furthermore, we define RET1 region required for incorporation into the 3' processome, determinants for RNA binding, subunit oligomerization and processive UTP incorporation, and predict druggable pockets.

  • Organizational Affiliation

    Department of Molecular Biology, University of Geneva, 1211 Geneva, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3' terminal uridylyl transferase512Trypanosoma bruceiMutation(s): 0 
Gene Names: 3' TUTase
Find proteins for Q8WQX5 (Trypanosoma brucei brucei)
Explore Q8WQX5 
Go to UniProtKB:  Q8WQX5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8WQX5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.168 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.8α = 90
b = 58.13β = 90
c = 66.64γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-26
    Type: Initial release
  • Version 1.1: 2016-12-28
    Changes: Database references
  • Version 1.2: 2024-01-10
    Changes: Data collection, Database references, Refinement description