Crystal structure of DmTailor in complex with UMPNPP

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

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Structural basis for acceptor RNA substrate selectivity of the 3' terminal uridylyl transferase Tailor.

Kroupova, A.Ivascu, A.Reimao-Pinto, M.M.Ameres, S.L.Jinek, M.

(2019) Nucleic Acids Res 47: 1030-1042

  • DOI: https://doi.org/10.1093/nar/gky1164
  • Primary Citation of Related Structures:  
    6I0S, 6I0T, 6I0U, 6I0V

  • PubMed Abstract: 

    Non-templated 3'-uridylation of RNAs has emerged as an important mechanism for regulating the processing, stability and biological function of eukaryotic transcripts. In Drosophila, oligouridine tailing by the terminal uridylyl transferase (TUTase) Tailor of numerous RNAs induces their degradation by the exonuclease Dis3L2, which serves functional roles in RNA surveillance and mirtron RNA biogenesis. Tailor preferentially uridylates RNAs terminating in guanosine or uridine nucleotides but the structural basis underpinning its RNA substrate selectivity is unknown. Here, we report crystal structures of Tailor bound to a donor substrate analog or mono- and oligouridylated RNA products. These structures reveal specific amino acid residues involved in donor and acceptor substrate recognition, and complementary biochemical assays confirm the critical role of an active site arginine in conferring selectivity toward 3'-guanosine terminated RNAs. Notably, conservation of these active site features suggests that other eukaryotic TUTases, including mammalian TUT4 and TUT7, might exhibit similar, hitherto unknown, substrate selectivity. Together, these studies provide critical insights into the specificity of 3'-uridylation in eukaryotic post-transcriptional gene regulation.

  • Organizational Affiliation

    Department of Biochemistry, University of Zurich, Zurich 8057, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Terminal uridylyltransferase Tailor384Drosophila melanogasterMutation(s): 0 
Gene Names: TailorCG1091
Find proteins for Q9VI58 (Drosophila melanogaster)
Explore Q9VI58 
Go to UniProtKB:  Q9VI58
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9VI58
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 2KH

Download Ideal Coordinates CCD File 
B [auth A]5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]amino}phosphoryl]uridine
C9 H16 N3 O14 P3
Query on MG

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.183α = 90
b = 61.183β = 90
c = 167.38γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
Cootmodel building
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-12-05
    Type: Initial release
  • Version 1.1: 2019-02-06
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description