1E9R

Bacterial conjugative coupling protein TrwBdeltaN70. Trigonal form in complex with sulphate.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Bacterial Conjugation Protein Trwb Resembles Ring Helicases and F1-ATPase

Gomis-Rueth, F.X.Moncalian, G.Perez-Luque, R.Gonzalez, A.Cabezon, E.De La Cruz, F.Coll, M.

(2001) Nature 409: 637

  • DOI: 10.1038/35054586
  • Primary Citation of Related Structures:  1E9S, 1GKI, 1GL6, 1GL7

  • PubMed Abstract: 
  • The transfer of DNA across membranes and between cells is a central biological process; however, its molecular mechanism remains unknown. In prokaryotes, trans-membrane passage by bacterial conjugation, is the main route for horizontal gene transfer. ...

    The transfer of DNA across membranes and between cells is a central biological process; however, its molecular mechanism remains unknown. In prokaryotes, trans-membrane passage by bacterial conjugation, is the main route for horizontal gene transfer. It is the means for rapid acquisition of new genetic information, including antibiotic resistance by pathogens. Trans-kingdom gene transfer from bacteria to plants or fungi and even bacterial sporulation are special cases of conjugation. An integral membrane DNA-binding protein, called TrwB in the Escherichia coli R388 conjugative system, is essential for the conjugation process. This large multimeric protein is responsible for recruiting the relaxosome DNA-protein complex, and participates in the transfer of a single DNA strand during cell mating. Here we report the three-dimensional structure of a soluble variant of TrwB. The molecule consists of two domains: a nucleotide-binding domain of alpha/beta topology, reminiscent of RecA and DNA ring helicases, and an all-alpha domain. Six equivalent protein monomers associate to form an almost spherical quaternary structure that is strikingly similar to F1-ATPase. A central channel, 20 A in width, traverses the hexamer.


    Organizational Affiliation

    Institut de Biologia Molecular de Barcelona, CSIC, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CONJUGAL TRANSFER PROTEIN TRWB
A, B, D, E, F, G
437Escherichia coliGene Names: trwB
Find proteins for Q04230 (Escherichia coli)
Go to UniProtKB:  Q04230
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, D, E, F, G
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.210 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 151.300α = 90.00
b = 151.300β = 90.00
c = 258.200γ = 120.00
Software Package:
Software NamePurpose
DMphasing
SCALAdata scaling
SHELXphasing
CNSrefinement
MLPHAREphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance