9QGY | pdb_00009qgy

Structure of the YbjP lipoprotein bound to the MacAB-TolC tripartite efflux pump

• PDB DOI: https://doi.org/10.2210/pdb9QGY/pdb
• EM Map EMD-53150: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-03-14 Released: 2026-03-25 
• Deposition Author(s): Kaplan, E., Horne, J., Luisi, B.F.
• Funding Organization(s): Wellcome Trust, European Research Council (ERC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.48 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structure of the YbjP lipoprotein bound to the MacAB-TolC tripartite efflux pump

Kaplan, E., Horne, J., Luisi, B.F.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 14-mer - A6B3C3D2 

Local Symmetry: Cyclic - C6  (Explore in 3D)
Local Stoichiometry: Homo 6-mer - A6 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - D2 Local Symmetry: Cyclic - C3  (Explore in 3D)
Local Stoichiometry: Hetero 6-mer - B3C3 Local Symmetry: Cyclic - C3  (Explore in 3D)
Local Stoichiometry: Hetero 9-mer - A6B3 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 498.06 kDa 
• Atom Count: 32,502 
• Modeled Residue Count: 4,198 
• Deposited Residue Count: 4,516 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Outer membrane protein TolC	A, B, C	471	Escherichia coli	Mutation(s): 0  Gene Names: tolC, colE1-i, mtcB, mukA, refI, toc, weeA, b3035, JW5503
UniProt
Find proteins for P02930 (Escherichia coli (strain K12)) Explore P02930  Go to UniProtKB:  P02930

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Uncharacterized lipoprotein YbjP	D, E, F	153	Escherichia coli	Mutation(s): 0  Gene Names: ybjP, b0865, JW0849
UniProt
Find proteins for P75818 (Escherichia coli (strain K12)) Explore P75818  Go to UniProtKB:  P75818

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Macrolide export protein MacA	G, H, I, J, K, L	371	Escherichia coli	Mutation(s): 0  Gene Names: macA, ybjY, b0878, JW0862
UniProt
Find proteins for P75830 (Escherichia coli (strain K12)) Explore P75830  Go to UniProtKB:  P75830

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Macrolide export ATP-binding/permease protein MacB	M, N	209	Escherichia coli	Mutation(s): 0  Gene Names: macB, ybjZ, b0879, JW0863 EC: 7.6.2
UniProt
Find proteins for P75831 (Escherichia coli (strain K12)) Explore P75831  Go to UniProtKB:  P75831

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
Z41	R [auth D], S [auth E], T [auth F]	(2S)-3-hydroxypropane-1,2-diyl dihexadecanoate C35 H68 O5 JEJLGIQLPYYGEE-XIFFEERXSA-N
CL	O [auth A], P [auth B], Q [auth C]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.48 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-03-25 
Deposition Author(s): Kaplan, E., Horne, J., Luisi, B.F.

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Funding Organization	Location	Grant Number
Wellcome Trust	United Kingdom	222451/Z/21/Z
European Research Council (ERC)	European Union	742210

Revision History  

• Version 1.0: 2026-03-25
  Type: Initial release