3hw9

Cation selective pathway of OmpF porin revealed by anomalous x-ray diffraction

Method: X-RAY DIFFRACTION Dmax: 102.5 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

Outer membrane protein F

Escherichia coli

UniProt P02931

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein homooligomer Homooligomer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 1–362 Not recorded P6G HEXAETHYLENE GLYCOL × 3 K POTASSIUM ION × 3 CL CHLORIDE ION × 3 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;293 K;0.5M NaCl, Na Phosphate pH 6.5, 0.9% BOG, 0.09% octylPOE and 14-18% PEG2000, VAPOR DIFFUSION, SITTING DROP, temperature 293K Resolution 2.61 Å R-free 0.300
2 Protein homooligomer Homooligomer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain B; UniProt 1–362 Not recorded P6G HEXAETHYLENE GLYCOL × 3 K POTASSIUM ION × 9 CL CHLORIDE ION × 3 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;293 K;0.5M NaCl, Na Phosphate pH 6.5, 0.9% BOG, 0.09% octylPOE and 14-18% PEG2000, VAPOR DIFFUSION, SITTING DROP, temperature 293K Resolution 2.61 Å R-free 0.300
3 Protein homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 1–362 Chain B; UniProt 1–362 Not recorded P6G HEXAETHYLENE GLYCOL × 2 K POTASSIUM ION × 4 CL CHLORIDE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;293 K;0.5M NaCl, Na Phosphate pH 6.5, 0.9% BOG, 0.09% octylPOE and 14-18% PEG2000, VAPOR DIFFUSION, SITTING DROP, temperature 293K Resolution 2.61 Å R-free 0.300

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

41 other PDB entries and 62 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name OMPF_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–362; UniProt 1–362 Author chain B; PDBConstruct 1–362; UniProt 1–362

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 3hw9

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 3hw9
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2. Structure Basics 2. Structure Basics

Entry ID entry_id3hw9
Deposition date deposition_date2009-06-17
Structure title titleCation selective pathway of OmpF porin revealed by anomalous x-ray diffraction
Keywords keywords;porin, membrane protein, integral membrane protein porin, Cell membrane, Cell outer membrane, Ion transport, Membrane, Phage recognition, Transmembrane, Transport ;; MEMBRANE PROTEIN, ion transport
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier32.25
Radius of gyration Rg (electron density) rg_electron31.80
Forward intensity I(0) i092695700.00
Molecular weight molecular_weight74709.0 kDa
Excluded volume excluded_volume92606 ų
Envelope volume envelope_volume124720 ų
Hydration-shell volume shell_volume33565 ų
Envelope diameter envelope_diameter105.7
Shell Rg shell_rg37.59
Envelope Rg envelope_rg31.51
Shape Rg shape_rg31.77
Total Rg total_rg32.39
Total atoms total_atoms5282
Residues n_residues678
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax102.5
Rg (real space) rg_real32.39
Rg uncertainty (real space) rg_real_error0.83
I(0) (real space) i0_real9.2700e+07
I(0) uncertainty (real space) i0_real_error1.6480e+06
Rg (reciprocal space) rg_reciprocal32.33
I(0) (reciprocal space) i0_reciprocal92690000.0000
Solution quality estimate total_estimate0.8509
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary31.4
Skewness Skewness skewness0.383
Kurtosis Kurtosis kurtosis-0.576
Angular range angular_range— – 0.2450 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha13610000.0000
Real-space data points n_real_points50
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.853; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.965; Smooth: 0.534

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd3hw9a_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.4 — Transmembrane beta-barrels
Superfamily Superfamily superfamilyf.4.3 — Porins
Family Family familyf.4.3.1 — Porin
Domain ID domain_idd3hw9b_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.4 — Transmembrane beta-barrels
Superfamily Superfamily superfamilyf.4.3 — Porins
Family Family familyf.4.3.1 — Porin

CATH v4.4 (2 domains)

Domain ID domain_id3hw9A00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology160 — Porin
Homologous superfamily homologous superfamily10 — Porin
Domain ID domain_id3hw9B00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology160 — Porin
Homologous superfamily homologous superfamily10 — Porin

8. Citations (1)

9. Files and Curves (10)