3PRN

E1M, A104W MUTANT OF RH. BLASTICA PORIN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Porin mutants with new channel properties.

Schmid, B., Maveyraud, L., Kromer, M., Schulz, G.E.

(1998) Protein Sci. 7: 1603-1611

  • DOI: 10.1002/pro.5560070714
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The general diffusion porin from Rhodopseudomonas blastica was produced in large amounts in Escherichia coli inclusion bodies and (re)natured to the exact native structure. Here, we report on 13 mutants at the pore eyelet giving rise to new diffusion ...

    The general diffusion porin from Rhodopseudomonas blastica was produced in large amounts in Escherichia coli inclusion bodies and (re)natured to the exact native structure. Here, we report on 13 mutants at the pore eyelet giving rise to new diffusion properties as measured in planar lipid bilayer experiments. The crystal structures of seven of these mutants were established. The effects of charge-modifying mutations at the pore eyelet are consistent with the known selectivity for cations. Deletions of 16 and 27 residues of the constriction loop L3 resulted in labile trimers and pores. The reduction of the eyelet cross section by introducing tryptophans gave rise to a closely correlated decrease of the conductivities. A mutant with six newly introduced tryptophans in the eyelet closed its pore in a defined manner within seconds under a voltage of 20 mV, suggesting the existence of two states. The results indicate that the pore can be engineered in a rational manner.

    Related Citations: 
    • Refined Structure of the Porin from Rhodopseudomonas Blastica. Comparison with the Porin from Rhodobacter Capsulatus
      Kreusch, A.,Schulz, G.E.
      (1994) J.Mol.Biol. 243: 891
    • Expression of Porin from Rhodopseudomonas Blastica in Escherichia Coli Inclusion Bodies and Folding Into Exact Native Structure
      Schmid, B.,Kromer, M.,Schulz, G.E.
      (1996) FEBS Lett. 381: 111

    Organizational Affiliation: 

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Freiburg im Breisgau, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PORIN
A
289Rhodobacter blasticusMutation(s): 1 
Gene Names: opmA
Membrane protein
mpstruc		Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group: 
Beta-Barrel Membrane Proteins: Porins and Relatives		Protein: 
Porin
Find proteins for P39767 (Rhodobacter blasticus)
Go to UniProtKB:  P39767
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C8E
Query on C8E
Download SDF File 
Download CCD File 
A
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG
Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.169 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 104.820α = 90.00
b = 104.820β = 90.00
c = 124.360γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
CCP4phasing
REFMACrefinement
XSCALEdata scaling
CCP4model building

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-08-12
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance