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1ek9

2.1A X-RAY STRUCTURE OF TOLC: AN INTEGRAL OUTER MEMBRANE PROTEIN AND EFFLUX PUMP COMPONENT FROM ESCHERICHIA COLI

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

OUTER MEMBRANE PROTEIN TOLC

Escherichia coli

UniProt P02930

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 3 water × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers
1ek9 1tqq 2vdd 2vde 2wmz 2xmn 6wxi

7 assemblies

Heteromeric or nucleic-acid complex
5ng5 5nik 5nil 5o66 5v5s 6wxh 8zal 8zar 9qgy 9tg4 9v52 9v53

13 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name TOLC_ECOLI
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–428； UniProt 25–452 Author chain B； PDBConstruct 1–428； UniProt 25–452 Author chain C； PDBConstruct 1–428； UniProt 25–452

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id1ek9
Deposition date deposition_date2000-03-07
Structure title title2.1A X-RAY STRUCTURE OF TOLC: AN INTEGRAL OUTER MEMBRANE PROTEIN AND EFFLUX PUMP COMPONENT FROM ESCHERICHIA COLI
Keywords keywordsIntegral membrane protein, Alpha helical Barrel, Beta Barrel, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

1ek9__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1ek9__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1ek9__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）41.14 Å
Rg (electron density)41.04 Å
Total Rg41.21 Å
Atom count9918
Residues1269
Excluded volume174410 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1ek9__assembly_1__model_1 trimeric （3） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (2)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_idd1ek9a_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.5 — Outer membrane efflux proteins (OEP)
Superfamily Superfamily superfamilyf.5.1 — Outer membrane efflux proteins (OEP)
Family Family familyf.5.1.1 — Outer membrane efflux proteins (OEP)
Domain ID domain_idd1ek9b_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.5 — Outer membrane efflux proteins (OEP)
Superfamily Superfamily superfamilyf.5.1 — Outer membrane efflux proteins (OEP)
Family Family familyf.5.1.1 — Outer membrane efflux proteins (OEP)
Domain ID domain_idd1ek9c_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.5 — Outer membrane efflux proteins (OEP)
Superfamily Superfamily superfamilyf.5.1 — Outer membrane efflux proteins (OEP)
Family Family familyf.5.1.1 — Outer membrane efflux proteins (OEP)

CATH v4.4 (3 domains)

Domain ID domain_id1ek9A00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1600 — Outer membrane efflux proteins (OEP)
Homologous superfamily homologous superfamily10 — Outer membrane efflux proteins (OEP)
Domain ID domain_id1ek9B00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1600 — Outer membrane efflux proteins (OEP)
Homologous superfamily homologous superfamily10 — Outer membrane efflux proteins (OEP)
Domain ID domain_id1ek9C00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1600 — Outer membrane efflux proteins (OEP)
Homologous superfamily homologous superfamily10 — Outer membrane efflux proteins (OEP)
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7. Citations (2)