4P0Y

Structure of the double stranded DNA binding type IV secretion protein TraN from Enterococcus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the double-stranded DNA-binding type IV secretion protein TraN from Enterococcus.

Goessweiner-Mohr, N.Eder, M.Hofer, G.Fercher, C.Arends, K.Birner-Gruenberger, R.Grohmann, E.Keller, W.

(2014) Acta Crystallogr.,Sect.D 70: 2376-2389

  • DOI: 10.1107/S1399004714014187
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Conjugative transfer through type IV secretion multiprotein complexes is the most important means of spreading antimicrobial resistance. Plasmid pIP501, frequently found in clinical Enterococcus faecalis and Enterococcus faecium isolates, is the firs ...

    Conjugative transfer through type IV secretion multiprotein complexes is the most important means of spreading antimicrobial resistance. Plasmid pIP501, frequently found in clinical Enterococcus faecalis and Enterococcus faecium isolates, is the first Gram-positive (G+) conjugative plasmid for which self-transfer to Gram-negative (G-) bacteria has been demonstrated. The pIP501-encoded type IV secretion system (T4SS) protein TraN localizes to the cytoplasm and shows specific DNA binding. The specific DNA-binding site upstream of the pIP501 origin of transfer (oriT) was identified by a novel footprinting technique based on exonuclease digestion and sequencing, suggesting TraN to be an accessory protein of the pIP501 relaxase TraA. The structure of TraN was determined to 1.35 Å resolution. It revealed an internal dimer fold with antiparallel β-sheets in the centre and a helix-turn-helix (HTH) motif at both ends. Surprisingly, structurally related proteins (excisionases from T4SSs of G+ conjugative transposons and transcriptional regulators of the MerR family) resembling only one half of TraN were found. Thus, TraN may be involved in the early steps of pIP501 transfer, possibly triggering pIP501 TraA relaxase activity by recruiting the relaxosome to the assembled mating pore.


    Organizational Affiliation

    Institute of Molecular Biosciences, University of Graz, Humboldtstrasse 50/III, 8010 Graz, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AM32
A, B
149Enterococcus faecalisMutation(s): 0 
Find proteins for Q7BVV5 (Enterococcus faecalis)
Go to UniProtKB:  Q7BVV5
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.183 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 33.100α = 90.00
b = 62.820β = 90.03
c = 55.870γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
SHELXDphasing
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-30
    Type: Initial release
  • Version 1.1: 2014-09-24
    Type: Database references
  • Version 1.2: 2015-09-23
    Type: Data collection