9M68 | pdb_00009m68

the flagellar filament cap FliD in complex with FlgL

• PDB DOI: https://doi.org/10.2210/pdb9M68/pdb
• EM Map EMD-63661: EMDB EMDataResource

• Classification: STRUCTURAL PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-03-07 Released: 2025-12-03 
• Deposition Author(s): Xing, Q., Cheng, X.Q., Jiang, W.X.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural insights into the initiation of bacterial flagellar filament elongation

Chen, L.X., Dong, X., Zhang, F.F., Cheng, X.Q., Wang, X., Jiang, W.X., Ma, L.X., Xing, Q.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C5  (Explore in 3D)
Global Stoichiometry: Hetero 10-mer - A5B5 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 339.01 kDa 
• Atom Count: 23,750 
• Modeled Residue Count: 3,190 
• Deposited Residue Count: 3,190 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar hook-associated protein 2	A, C [auth B], E [auth D], G, I	415	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: fliD, flaV, flbC, STM1960
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 3	B [auth F], D [auth C], F [auth E], H, J	223	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: flgL, flaT, flaU, STM1184
UniProt
Find proteins for P16326 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P16326  Go to UniProtKB:  P16326

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.19.2_4158
RECONSTRUCTION	cryoSPARC	4.01

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-03 
Deposition Author(s): Xing, Q., Cheng, X.Q., Jiang, W.X.

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

Revision History  

• Version 1.0: 2025-12-03
  Type: Initial release