Structure of OF RRAA (MENG), a protein inhibitor of RNA processing

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

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The X-ray Structure of Escherichia coli RraA (MenG), A Protein Inhibitor of RNA Processing.

Monzingo, A.F.Gao, J.Qiu, J.Georgiou, G.Robertus, J.D.

(2003) J Mol Biol 332: 1015-1024

  • DOI: https://doi.org/10.1016/s0022-2836(03)00970-7
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The Escherichia coli protein regulator of RNase E activity A (RraA) has recently been shown to act as a trans-acting modulator of RNA turnover in bacteria; it binds to the essential endonuclease RNase E and inhibits RNA processing in vivo and in vitro. Here, we report the 2.0A X-ray structure of RraA. The structure reveals a ring-like trimer with a central cavity of approximately 12A in diameter. Based on earlier sequence analysis, RraA had been identified as a putative S-adenosylmethionine:2-demethylmenaquinone and was annotated as MenG. However, an analysis of the RraA structure shows that the protein lacks the structural motifs usually required for methylases. Comparison of the observed fold with that of other proteins (and domains) suggests that the RraA fold is an ancient platform that has been adapted for a wide range of functions. An analysis of the amino acid sequence shows that the E.coli RraA exhibits an ancient relationship to a family of aldolases.

  • Organizational Affiliation

    Institute for Cellular and Molecular Biology, 1 University Station, University of Texas at Austin, Austin, TX 78712, USA.

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C
161Escherichia coliMutation(s): 0 
Gene Names: MENG
Find proteins for P0A8R0 (Escherichia coli (strain K12))
Explore P0A8R0 
Go to UniProtKB:  P0A8R0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A8R0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.454α = 90
b = 93.945β = 132.72
c = 67.949γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references