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7lhg

Cryo-EM structure of E. coli P pilus tip assembly intermediate PapC-PapD-PapK-PapG in the first conformation

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

P fimbrial usher protein PapC

Escherichia coli

UniProt A0A773A954

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 Chaperone protein PapD × 1 （P15319） Fimbrial adapter PapK × 1 （P62532） P fimbria tip G-adhesin PapG-II × 1 （A0A798R8B8） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
7lhg 7lhh 7lhi

3 assemblies

View Construct and Data Evidence
UniProt name A0A773A954_ECOLX
Isoform —
PDB entities 1
Chains and sequence ranges Author chain C； PDBConstruct 1–809； UniProt 28–836

Chaperone protein PapD

Escherichia coli

UniProt P15319

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 P fimbrial usher protein PapC × 1 （A0A773A954） Fimbrial adapter PapK × 1 （P62532） P fimbria tip G-adhesin PapG-II × 1 （A0A798R8B8） Consistent with protein count

Other States of the Same Protein in the Database

Monomer
3dpa 5k93 5k93

3 assemblies

Homodimer
1qpp 1qpx 2j7l

3 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1n0l 1n0l 1pdk 2j2z 2wmp 2xg4 2xg5 3me0 6cd2 7lhg 7lhh 7lhi

12 assemblies

View Construct and Data Evidence
UniProt name PAPD_ECOLX
Isoform —
PDB entities 2
Chains and sequence ranges Author chain D； PDBConstruct 1–239； UniProt 1–239

Fimbrial adapter PapK

Escherichia coli

UniProt P62532

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 P fimbrial usher protein PapC × 1 （A0A773A954） Chaperone protein PapD × 1 （P15319） P fimbria tip G-adhesin PapG-II × 1 （A0A798R8B8） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1pdk 7lhg 7lhh 7lhi

4 assemblies

View Construct and Data Evidence
UniProt name PAPK_ECOLX
Isoform —
PDB entities 3
Chains and sequence ranges Author chain K； PDBConstruct 1–178； UniProt 1–178

P fimbria tip G-adhesin PapG-II

Escherichia coli

UniProt A0A798R8B8

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 P fimbrial usher protein PapC × 1 （A0A773A954） Chaperone protein PapD × 1 （P15319） Fimbrial adapter PapK × 1 （P62532） Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
7lhg 7lhh 7lhi

3 assemblies

View Construct and Data Evidence
UniProt name A0A798R8B8_ECOLX
Isoform —
PDB entities 4
Chains and sequence ranges Author chain G； PDBConstruct 1–336； UniProt 1–336

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_id7lhg
Deposition date deposition_date2021-01-23
Structure title titleCryo-EM structure of E. coli P pilus tip assembly intermediate PapC-PapD-PapK-PapG in the first conformation
Keywords keywordsCryo-EM, Uropathogenic Escherichia coli, chaperone-usher, P pilus, CHAPERONE; CHAPERONE
Experimental Method methodELECTRON MICROSCOPY
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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.

7lhg__assembly_1__model_1

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

Download this curve (.dat)

7lhg__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.

7lhg__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）41.77 Å
Rg (electron density)42.02 Å
Total Rg42.05 Å
Atom count11592
Residues1492
Excluded volume204420 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 7lhg__assembly_1__model_1 tetrameric （4） 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 (4)

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id7lhgC01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily410 — PapC, N-terminal domain
Domain ID domain_id7lhgC02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily2610 — Outer membrane usher protein FimD, plug domain
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7. Citations (1)