9U7Y | pdb_00009u7y

Structure of the tip region of the intial complex in bacterial flagellar filament assembly at 3.68 angstroms resolution, conformation 3.

• PDB DOI: https://doi.org/10.2210/pdb9U7Y/pdb
• EM Map EMD-63947: EMDB EMDataResource

• Classification: PROTEIN FIBRIL
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium str. LT2
• Mutation(s): No 


• Deposited: 2025-03-25 Released: 2026-04-01 
• Deposition Author(s): Chen, L.X., Jiang, W.X., Cheng, X.Q., Dong, X., Xing, Q.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.68 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structure of the tip region of the intial complex in bacterial flagellar filament assembly at 3.68 angstroms resolution, conformation 3.

Chen, L.X., Jiang, W.X., Cheng, X.Q., Dong, X., Xing, Q.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 60-mer - A33B11C11D5 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 60-mer - A33B11C11D4E1 

Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 33-mer - A33 Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Hetero 22-mer - B11C11 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 2,670.03 kDa 
• Atom Count: 181,886 
• Modeled Residue Count: 24,480 
• Deposited Residue Count: 25,204 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar hook-associated protein 2	A [auth AA], B [auth AB], D [auth AD], E [auth AE]	467	Salmonella enterica subsp. enterica serovar Typhimurium str. LT2	Mutation(s): 0
UniProt
Find proteins for P16328 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P16328  Go to UniProtKB:  P16328

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar hook-associated protein 2	C [auth AC]	467	Salmonella enterica subsp. enterica serovar Typhimurium str. LT2	Mutation(s): 0
UniProt
Find proteins for P16328 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P16328  Go to UniProtKB:  P16328

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar hook-associated protein 3	F [auth BA], G [auth BB], H [auth BC], I [auth BD], J [auth BE], K [auth BF], L [auth BG], M [auth BH], N [auth BI], O [auth BJ], P [auth BK]	317	Salmonella enterica subsp. enterica serovar Typhimurium str. LT2	Mutation(s): 0
UniProt
Find proteins for P16326 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P16326  Go to UniProtKB:  P16326

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar hook-associated protein 1	AA [auth CK], Q [auth CA], R [auth CB], S [auth CC], T [auth CD], U [auth CE], V [auth CF], W [auth CG], X [auth CH], Y [auth CI], Z [auth CJ]	553	Salmonella enterica subsp. enterica serovar Typhimurium str. LT2	Mutation(s): 0
UniProt
Find proteins for P0A1J5 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P0A1J5  Go to UniProtKB:  P0A1J5

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar hook protein FlgE	AB [auth FD], BA [auth DA], BB [auth FE], CA [auth DB], CB [auth FF], DA [auth DC], DB [auth FG], EA [auth DD], EB [auth FH], FA [auth DE], FB [auth FI], GA [auth DF], GB [auth FJ], HA [auth DG], HB [auth FK], IA [auth DH], JA [auth DI], KA [auth DJ], LA [auth DK], MA [auth EA], NA [auth EB], OA [auth EC], PA [auth ED], QA [auth EE], RA [auth EF], SA [auth EG], TA [auth EH], UA [auth EI], VA [auth EJ], WA [auth EK], XA [auth FA], YA [auth FB], ZA [auth FC]	403	Salmonella enterica subsp. enterica serovar Typhimurium str. LT2	Mutation(s): 0
UniProt
Find proteins for P0A1J1 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P0A1J1  Go to UniProtKB:  P0A1J1

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.68 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-04-01 
Deposition Author(s): Chen, L.X., Jiang, W.X., Cheng, X.Q., Dong, X., Xing, Q.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32371277
National Natural Science Foundation of China (NSFC)	China	32301028

Revision History  

• Version 1.0: 2026-04-01
  Type: Initial release