6EHF

OmpT (in-vitro folded), an outer membrane protein Vibrio cholerae (trimer form)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.72 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Unusual Constriction Zones in the Major Porins OmpU and OmpT from Vibrio cholerae.

Pathania, M.Acosta-Gutierrez, S.Bhamidimarri, S.P.Basle, A.Winterhalter, M.Ceccarelli, M.van den Berg, B.

(2018) Structure 26: 708-721.e4

  • DOI: 10.1016/j.str.2018.03.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The outer membranes (OM) of many Gram-negative bacteria contain general porins, which form nonspecific, large-diameter channels for the diffusional uptake of small molecules required for cell growth and function. While the porins of Enterobacteriacea ...

    The outer membranes (OM) of many Gram-negative bacteria contain general porins, which form nonspecific, large-diameter channels for the diffusional uptake of small molecules required for cell growth and function. While the porins of Enterobacteriaceae (e.g., E. coli OmpF and OmpC) have been extensively characterized structurally and biochemically, much less is known about their counterparts in Vibrionaceae. Vibrio cholerae, the causative agent of cholera, has two major porins, OmpU and OmpT, for which no structural information is available despite their importance for the bacterium. Here we report high-resolution X-ray crystal structures of V. cholerae OmpU and OmpT complemented with molecular dynamics simulations. While similar overall to other general porins, the channels of OmpU and OmpT have unusual constrictions that create narrower barriers for small-molecule permeation and change the internal electric fields of the channels. Together with electrophysiological and in vitro transport data, our results illuminate small-molecule uptake within the Vibrionaceae.


    Organizational Affiliation

    Institute for Cell and Molecular Biosciences, The Medical School, Newcastle University, Newcastle Upon Tyne NE2 4HH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
OmpT protein
A
319Vibrio cholerae serotype O1 (strain ATCC 39541 / Classical Ogawa 395 / O395)Mutation(s): 1 
Gene Names: ompT
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Porins and Relatives
Protein: 
OmpT porin (outer membrane expressed)
Find proteins for A0A0H3AME7 (Vibrio cholerae serotype O1 (strain ATCC 39541 / Classical Ogawa 395 / O395))
Go to UniProtKB:  A0A0H3AME7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.72 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.238 
  • Space Group: I 4 3 2
Unit Cell:
Length (Å)Angle (°)
a = 200.910α = 90.00
b = 200.910β = 90.00
c = 200.910γ = 90.00
Software Package:
Software NamePurpose
xia2data scaling
MOLREPphasing
REFMACrefinement
xia2data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Innovative Medicines Initiatives Joint UndertakingUnited Kingdom115525

Revision History 

  • Version 1.0: 2018-04-25
    Type: Initial release
  • Version 1.1: 2018-05-09
    Type: Data collection, Database references
  • Version 1.2: 2018-10-03
    Type: Data collection