9FWZ | pdb_00009fwz

Cryo-EM structure of the type 1 pilus assembly platform as part of the FimA-bound chaperone-usher pilus complex (Local refinement including FimD, FimC, FimAn, FimAn-1 and FimAn-2)

• PDB DOI: https://doi.org/10.2210/pdb9FWZ/pdb
• EM Map EMD-50838: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli, Escherichia coli BL21(DE3)
• Mutation(s): No 
• Membrane Protein: Yes  MemProtMD


• Deposited: 2024-07-01 Released: 2025-06-04 
• Deposition Author(s): Bachmann, P., Afanasyev, P., Boehringer, D., Glockshuber, R.
• Funding Organization(s): Swiss National Science Foundation

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of the type 1 pilus assembly platform as part of the FimA-bound chaperone-usher pilus complex (Local refinement including FimD, FimC, FimAn, FimAn-1 and FimAn-2)

Bachmann, P., Afanasyev, P., Boehringer, D., Glockshuber, R.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A3B1C1 Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 3-mer - A3 

Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 3-mer - A3 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 163.88 kDa 
• Atom Count: 9,987 
• Modeled Residue Count: 1,331 
• Deposited Residue Count: 1,533 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Outer membrane usher protein FimD	A [auth D]	847	Escherichia coli	Mutation(s): 0  Gene Names: fimD, b4317, JW5780 Membrane Entity: Yes
UniProt
Find proteins for P30130 (Escherichia coli (strain K12)) Explore P30130  Go to UniProtKB:  P30130

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Chaperone protein FimC	B [auth C]	206	Escherichia coli	Mutation(s): 0  Gene Names: fimC, b4316, JW4279 Membrane Entity: Yes
UniProt
Find proteins for P31697 (Escherichia coli (strain K12)) Explore P31697  Go to UniProtKB:  P31697

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Type-1 fimbrial protein, A chain	C [auth B], D [auth A], E	160	Escherichia coli	Mutation(s): 0  Gene Names: fimA, pilA, b4314, JW4277 Membrane Entity: Yes
UniProt
Find proteins for P04128 (Escherichia coli (strain K12)) Explore P04128  Go to UniProtKB:  P04128

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.1_5286:

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-06-04 
Deposition Author(s): Bachmann, P., Afanasyev, P., Boehringer, D., Glockshuber, R.

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Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	310030_201234

Revision History  

• Version 1.0: 2025-06-04
  Type: Initial release