4OKE

Structure of RNase AS, a polyadenylate-specific exoribonuclease affecting mycobacterial virulence in vivo


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

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Literature

Structure and Function of RNase AS, a Polyadenylate-Specific Exoribonuclease Affecting Mycobacterial Virulence In Vivo

Romano, M.van de Weerd, R.Brouwer, F.C.C.Roviello, G.N.Lacroix, R.Sparrius, M.van den Brink-van Stempvoort, G.Maaskant, J.J.van der Sar, A.M.Appelmelk, B.J.Geurtsen, J.J.Berisio, R.

(2014) Structure 22: 719-730

  • DOI: https://doi.org/10.1016/j.str.2014.01.014
  • Primary Citation of Related Structures:  
    4OKE, 4OKJ, 4OKK

  • PubMed Abstract: 

    The cell-envelope of Mycobacterium tuberculosis plays a key role in bacterial virulence and antibiotic resistance. Little is known about the molecular mechanisms of regulation of cell-envelope formation. Here, we elucidate functional and structural properties of RNase AS, which modulates M. tuberculosis cell-envelope properties and strongly impacts bacterial virulence in vivo. The structure of RNase AS reveals a resemblance to RNase T from Escherichia coli, an RNase of the DEDD family involved in RNA maturation. We show that RNase AS acts as a 3'-5'-exoribonuclease that specifically hydrolyzes adenylate-containing RNA sequences. Also, crystal structures of complexes with AMP and UMP reveal the structural basis for the observed enzyme specificity. Notably, RNase AS shows a mechanism of substrate recruitment, based on the recognition of the hydrogen bond donor NH2 group of adenine. Our work opens a field for the design of drugs able to reduce bacterial virulence in vivo.


  • Organizational Affiliation

    Institute of Biostructures and Bioimaging, National Research Council, Via Mezzocannone 16, I-80134 Naples, Italy.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
3'-5' exoribonuclease Rv2179c/MT2234.1
A, B
168Mycobacterium tuberculosisMutation(s): 0 
Gene Names: Rv2179cMT2234.1
EC: 3.1.13
UniProt
Find proteins for P9WJ73 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WJ73 
Go to UniProtKB:  P9WJ73
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WJ73
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.433α = 90
b = 76.664β = 90
c = 104.372γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data 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: 2014-05-21
    Type: Initial release
  • Version 1.1: 2024-03-20
    Changes: Data collection, Database references, Derived calculations