Structure of the C-terminal domain of the Escherichia Coli ProQ RNA binding protein

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Structure of the Escherichia coli ProQ RNA-binding protein.

Gonzalez, G.M.Hardwick, S.W.Maslen, S.L.Skehel, J.M.Holmqvist, E.Vogel, J.Bateman, A.Luisi, B.F.Broadhurst, R.W.

(2017) RNA 23: 696-711

  • DOI: https://doi.org/10.1261/rna.060343.116
  • Primary Citation of Related Structures:  
    5NB9, 5NBB

  • PubMed Abstract: 

    The protein ProQ has recently been identified as a global small noncoding RNA-binding protein in Salmonella , and a similar role is anticipated for its numerous homologs in divergent bacterial species. We report the solution structure of Escherichia coli ProQ, revealing an N-terminal FinO-like domain, a C-terminal domain that unexpectedly has a Tudor domain fold commonly found in eukaryotes, and an elongated bridging intradomain linker that is flexible but nonetheless incompressible. Structure-based sequence analysis suggests that the Tudor domain was acquired through horizontal gene transfer and gene fusion to the ancestral FinO-like domain. Through a combination of biochemical and biophysical approaches, we have mapped putative RNA-binding surfaces on all three domains of ProQ and modeled the protein's conformation in the apo and RNA-bound forms. Taken together, these data suggest how the FinO, Tudor, and linker domains of ProQ cooperate to recognize complex RNA structures and serve to promote RNA-mediated regulation.

  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA chaperone ProQ53Escherichia coli K-12Mutation(s): 0 
Gene Names: proQyebJyobEyoeCb1831JW5300
Find proteins for P45577 (Escherichia coli (strain K12))
Explore P45577 
Go to UniProtKB:  P45577
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP45577
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom094229/Z/10/Z

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-03
    Type: Initial release
  • Version 1.1: 2017-05-31
    Changes: Structure summary
  • Version 1.2: 2017-08-30
    Changes: Author supporting evidence
  • Version 1.3: 2019-05-08
    Changes: Data collection
  • Version 1.4: 2023-06-14
    Changes: Data collection, Database references, Other