1UYN

Translocator domain of autotransporter NalP from Neisseria meningitidis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the Translocator Domain of a Bacterial Autotransporter

Oomen, C.J.Van Ulsen, P.Van Gelder, P.Feijen, M.Tommassen, J.Gros, P.

(2004) Embo J. 23: 1257

  • DOI: 10.1038/sj.emboj.7600148
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Autotransporters are virulence-related proteins of Gram-negative bacteria that are secreted via an outer-membrane-based C-terminal extension, the translocator domain. This domain supposedly is sufficient for the transport of the N-terminal passenger ...

    Autotransporters are virulence-related proteins of Gram-negative bacteria that are secreted via an outer-membrane-based C-terminal extension, the translocator domain. This domain supposedly is sufficient for the transport of the N-terminal passenger domain across the outer membrane. We present here the crystal structure of the in vitro-folded translocator domain of the autotransporter NalP from Neisseria meningitidis, which reveals a 12-stranded beta-barrel with a hydrophilic pore of 10 x 12.5 A that is filled by an N-terminal alpha-helix. The domain has pore activity in vivo and in vitro. Our data are consistent with the model of passenger-domain transport through the hydrophilic channel within the beta-barrel, and inconsistent with a model for transport through a central channel formed by an oligomer of translocator domains. However, the dimensions of the pore imply translocation of the secreted domain in an unfolded form. An alternative model, possibly covering the transport of folded domains, is that passenger-domain transport involves the Omp85 complex, the machinery required for membrane insertion of outer-membrane proteins, on which autotransporters are dependent.


    Organizational Affiliation

    Department of Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NALP
X
308Neisseria meningitidisGene Names: nalP
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Outer Membrane Autotransporters
Protein: 
NalP autotransporter translocator domain
Find proteins for Q8GKS5 (Neisseria meningitidis)
Go to UniProtKB:  Q8GKS5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CXE
Query on CXE

Download SDF File 
Download CCD File 
X
PENTAETHYLENE GLYCOL MONODECYL ETHER
C20 H42 O6
QAXPOSPGRHYIHE-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
X
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.228 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 57.970α = 90.00
b = 57.970β = 90.00
c = 346.435γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance