Crystal Structure of Nuclease Domain of Ribonuclase III from Mycobacterium Tuberculosis

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.286 

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This is version 1.5 of the entry. See complete history


Structure of the nuclease domain of ribonuclease III from M. tuberculosis at 2.1 A

Akey, D.L.Berger, J.M.

(2005) Protein Sci 14: 2744-2750

  • DOI: https://doi.org/10.1110/ps.051665905
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    RNase III enzymes are a highly conserved family of proteins that specifically cleave double-stranded (ds)RNA. These proteins are involved in a diverse group of functions, including ribosomal RNA processing, mRNA maturation and decay, snRNA and snoRNA processing, and RNA interference. Here we report the crystal structure of the nuclease domain of RNase III from the pathogen Mycobacterium tuberculosis. Although globally similar to other RNase III folds, this structure has some features not observed in previously reported models. These include the presence of an additional metal ion near the catalytic site, as well as conserved secondary structural elements that are proposed to have functional roles in the recognition of dsRNAs.

  • Organizational Affiliation

    Department of Molecular and Cellular Biology, University of California, Berkeley, Berkeley, CA 94720, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ribonuclease III242Mycobacterium tuberculosisMutation(s): 0 
Gene Names: rnc
Find proteins for P9WH03 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WH03 
Go to UniProtKB:  P9WH03
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WH03
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.286 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.589α = 90
b = 72.589β = 90
c = 96.013γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-07-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model
  • Version 1.4: 2017-10-11
    Changes: Refinement description
  • Version 1.5: 2024-02-14
    Changes: Data collection, Database references, Derived calculations