2J1N

osmoporin OmpC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of Osmoporin Ompc from E. Coli at 2.0 A.

Basle, A.Rummel, G.Storici, P.Rosenbusch, J.P.Schirmer, T.

(2006) J.Mol.Biol. 362: 933

  • DOI: 10.1016/j.jmb.2006.08.002

  • PubMed Abstract: 
  • Porins form transmembrane pores in the outer membrane of Gram-negative bacteria with matrix porin OmpF and osmoporin OmpC from Escherichia coli being differentially expressed depending on environmental conditions. The three-dimensional structure of O ...

    Porins form transmembrane pores in the outer membrane of Gram-negative bacteria with matrix porin OmpF and osmoporin OmpC from Escherichia coli being differentially expressed depending on environmental conditions. The three-dimensional structure of OmpC has been determined to 2.0 A resolution by X-ray crystallography. As expected from the high sequence similarity, OmpC adopts the OmpF-like 16-stranded hollow beta-barrel fold with three beta-barrels associated to form a tight trimer. Unlike in OmpF, the extracellular loops form a continuous wall at the perimeter of the vestibule common to the three pores, due to a 14-residues insertion in loop L4. The pore constriction and the periplasmic outlet are very similar to OmpF with 74% of the pore lining residues being conserved. Overall, only few ionizable residues are exchanged at the pore lining. The OmpC structure suggests that not pore size, but electrostatic pore potential and particular atomic details of the pore linings are the critical parameters that physiologically distinguish OmpC from OmpF.


    Organizational Affiliation

    Division of Structural Biology, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
OUTER MEMBRANE PROTEIN C
A, B, C
346Escherichia coli (strain K12)Gene Names: ompC (meoA, par)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Porins and Relatives
Protein: 
OmpC Osmoporin
Find proteins for P06996 (Escherichia coli (strain K12))
Go to UniProtKB:  P06996
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
D12
Query on D12

Download SDF File 
Download CCD File 
C
DODECANE
C12 H26
SNRUBQQJIBEYMU-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, B, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 200.779α = 90.00
b = 99.391β = 90.00
c = 74.328γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-09-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Refinement description, Version format compliance