RNase-L Inhibitor

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


X-ray structure of RLI, an essential twin cassette ABC ATPase involved in ribosome biogenesis and HIV capsid assembly.

Karcher, A.Buttner, K.Martens, B.Jansen, R.P.Hopfner, K.P.

(2005) Structure 13: 649-659

  • DOI: https://doi.org/10.1016/j.str.2005.02.008
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The ABC ATPase RNase-L inhibitor (RLI) emerges as a key enzyme in ribosome biogenesis, formation of translation preinitiation complexes, and assembly of HIV capsids. To help reveal the structural mechanism of RLI, we determined the Mg2+-ADP bound crystal structure of the twin cassette ATPase of P. furiosus RLI at 1.9 A resolution and analyzed functional motifs in yeast in vivo. RLI shows similarities but also differences to known ABC enzyme structures. Twin nucleotide binding domains (NBD1 and NBD2) are arranged to form two composite active sites in their interface cleft, indicating they undergo the ATP-driven clamp-like motion of the NBDs of ABC transporters. An unusual "hinge" domain along the NBD1:NBD2 interface provides a frame for association and possibly ATP-driven conformational changes of the NBDs. Our results establish a first structural basis for ABC domain heterodimers and suggest that RLI may act as mechanochemical enzyme in ribosome and HIV capsid biogenesis.

  • Organizational Affiliation

    Gene Center, Department of Chemistry and Biochemistry, University of Munich, Feodor-Lynen-Strasse 25, D-81377 Munich, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNase l inhibitor538Pyrococcus furiosusMutation(s): 8 
Find proteins for Q8U306 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8U306 
Go to UniProtKB:  Q8U306
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8U306
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.68α = 90
b = 74.64β = 90
c = 123.69γ = 90
Software Package:
Software NamePurpose
TRUNCATEdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-04-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Advisory, Refinement description