4KJI

Novel re-arrangement of an RsmA/cSRa family protein to create a structurally distinct new RNA-binding family member


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.222 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Rearrangement in an RsmA/CsrA Ortholog of Pseudomonas aeruginosa Creates a Dimeric RNA-Binding Protein, RsmN.

Morris, E.R.Hall, G.Li, C.Heeb, S.Kulkarni, R.V.Lovelock, L.Silistre, H.Messina, M.Camara, M.Emsley, J.Williams, P.Searle, M.S.

(2013) Structure 21: 1659-1671

  • DOI: 10.1016/j.str.2013.07.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In bacteria, the highly conserved RsmA/CsrA family of RNA-binding proteins functions as global posttranscriptional regulators acting on mRNA translation and stability. Through phenotypic complementation of an rsmA mutant in Pseudomonas aeruginosa, we ...

    In bacteria, the highly conserved RsmA/CsrA family of RNA-binding proteins functions as global posttranscriptional regulators acting on mRNA translation and stability. Through phenotypic complementation of an rsmA mutant in Pseudomonas aeruginosa, we discovered a family member, termed RsmN. Elucidation of the RsmN crystal structure and that of the complex with a hairpin from the sRNA, RsmZ, reveals a uniquely inserted α helix, which redirects the polypeptide chain to form a distinctly different protein fold to the domain-swapped dimeric structure of RsmA homologs. The overall β sheet structure required for RNA recognition is, however, preserved with compensatory sequence and structure differences, allowing the RsmN dimer to target binding motifs in both structured hairpin loops and flexible disordered RNAs. Phylogenetic analysis indicates that, although RsmN appears unique to P. aeruginosa, homologous proteins with the inserted α helix are more widespread and arose as a consequence of a gene duplication event.


    Organizational Affiliation

    School of Chemistry, Centre for Biomolecular Sciences, University of Nottingham, Nottingham NG7 2RD, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RsmN, a RNA-binding protein of Regulator of Secondary Metabolism
A, B
79Pseudomonas aeruginosa (strain UCBPP-PA14)
Find proteins for A0A0H2ZIZ8 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  A0A0H2ZIZ8
Entity ID: 2
MoleculeChainsLengthOrganism
RsmZ-2C,D16N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.317 
  • R-Value Work: 0.222 
  • Space Group: P 43 2 2
Unit Cell:
Length (Å)Angle (°)
a = 83.649α = 90.00
b = 83.649β = 90.00
c = 94.239γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
DNAdata collection
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-05-03 
  • Released Date: 2013-09-04 
  • Deposition Author(s): Li, C.

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release
  • Version 1.1: 2013-09-25
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description