3UB1

Ntf2 like protein involved in plasmid conjugation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The conjugation protein TcpC from Clostridium perfringens is structurally related to the type IV secretion system protein VirB8 from Gram-negative bacteria.

Porter, C.J.Bantwal, R.Bannam, T.L.Rosado, C.J.Pearce, M.C.Adams, V.Lyras, D.Whisstock, J.C.Rood, J.I.

(2012) Mol.Microbiol. 83: 275-288

  • DOI: 10.1111/j.1365-2958.2011.07930.x

  • PubMed Abstract: 
  • Bacterial conjugation is important for the acquisition of virulence and antibiotic resistance genes. We investigated the mechanism of conjugation in Gram-positive pathogens using a model plasmid pCW3 from Clostridium perfringens. pCW3 encodes tetracy ...

    Bacterial conjugation is important for the acquisition of virulence and antibiotic resistance genes. We investigated the mechanism of conjugation in Gram-positive pathogens using a model plasmid pCW3 from Clostridium perfringens. pCW3 encodes tetracycline resistance and contains the tcp locus, which is essential for conjugation. We showed that the unique TcpC protein (359 amino acids, 41 kDa) was required for efficient conjugative transfer, localized to the cell membrane independently of other conjugation proteins, and that membrane localization was important for its function, oligomerization and interaction with the conjugation proteins TcpA, TcpH and TcpG. The crystal structure of the C-terminal component of TcpC (TcpC(99-359)) was determined to 1.8-Å resolution. TcpC(99-359) contained two NTF2-like domains separated by a short linker. Unexpectedly, comparative structural analysis showed that each of these domains was structurally homologous to the periplasmic region of VirB8, a component of the type IV secretion system from Agrobacterium tumefaciens. Bacterial two-hybrid studies revealed that the C-terminal domain was critical for interactions with other conjugation proteins. The N-terminal region of TcpC was required for efficient conjugation, oligomerization and protein-protein interactions. We conclude that by forming oligomeric complexes, TcpC contributes to the stability and integrity of the conjugation apparatus, facilitating efficient pCW3 transfer.


    Organizational Affiliation

    ARC Centre of Excellence in Structural and Functional Microbial Genomics, Clayton, Vic. 3800, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ORF13-like protein
A, B, C, D, E, F
261Clostridium perfringensMutation(s): 0 
Gene Names: tcpC
Find proteins for Q1PLH8 (Clostridium perfringens)
Go to UniProtKB:  Q1PLH8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEG
Query on PEG

Download SDF File 
Download CCD File 
B, C, D
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E, F
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.163 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 121.495α = 90.00
b = 121.842β = 90.00
c = 125.526γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
MOSFLMdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-08
    Type: Initial release
  • Version 1.1: 2012-02-15
    Type: Structure summary