Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 137689.39 
• Atom Count: 9721 
• Residue Count: 1233 
• Unique protein chains: 1

2O4V

An arginine ladder in OprP mediates phosphate specific transfer across the outer membrane

• DOI: 10.2210/pdb2O4V/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)


• Deposited: 2006-12-05 Released: 2006-12-26 
• Deposition Author(s): Moraes, T.F., Bains, M., Hancock, R.E., Strynadka, N.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.94 Å
• R-Value Free: 0.194 
• R-Value Work: 0.174 

Literature

An arginine ladder in OprP mediates phosphate-specific transfer across the outer membrane.

Moraes, T.F., Bains, M., Hancock, R.E., Strynadka, N.C.

(2007) Nat.Struct.Mol.Biol. 14: 85-87

• PubMed: 17187075 
• DOI: 10.1038/nsmb1189


• PubMed Abstract: 
  

The outer membrane protein OprP mediates the transport of essential phosphate anions into the pathogenic bacterium Pseudomonas aeruginosa. Here we report the crystallographic structure of trimeric OprP at 1.9-A resolution, revealing an unprecedented 9-residue arginine 'ladder' that spans from the extracellular surface down through a constriction zone where phosphate is coordinated. Lysine residues coat the inner periplasmic surface, creating an 'electropositive sink' that pulls the phosphates through the eyelet and into the cell.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology and the Center for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Porin P	A, B, C	411	Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)	Mutation(s): 0  Gene Names: oprP
Membrane protein mpstruct	Group:  TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group:  Beta-Barrel Membrane Proteins: Porins and Relatives	Protein:  OprP phosphate-specific transporter
Find proteins for P05695 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Go to UniProtKB:  P05695

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PO4	A, B, C	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
C8E	A, C	(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE C16 H34 O5 FEOZZFHAVXYAMB-UHFFFAOYSA-N
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
GOL	A, C	GLYCEROL GLYCERIN; PROPANE-1,2,3-TRIOL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
CA	A, B, C	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.94 Å
• R-Value Free: 0.194 
• R-Value Work: 0.174 
• Space Group: C 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 255.130	α = 90.00
b = 142.769	β = 99.49
c = 62.025	γ = 90.00

Software Package:

Software Name	Purpose
MOSFLM	data reduction
CCP4	data scaling
ADSC	data collection
SHELXS	phasing
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-12-05 
• Released Date: 2006-12-26 
• Deposition Author(s): Moraes, T.F., Bains, M., Hancock, R.E., Strynadka, N.C.

Revision History 

• Version 1.0: 2006-12-26
  Type: Initial release
• Version 1.1: 2008-05-01
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Non-polymer description, Version format compliance