9C4O

Cryo-EM structure of PqqU with ligand PQQ

• PDB DOI: https://doi.org/10.2210/pdb9C4O/pdb
• EM Map EMD-45192: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Escherichia coli BW25113
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2024-06-04 Released: 2024-06-19 
• Deposition Author(s): Munder, F., Venugopal, H., Grinter, R.
• Funding Organization(s): National Health and Medical Research Council (NHMRC, Australia), Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 1.99 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

High-affinity PQQ import is widespread in Gram-negative bacteria.

Munder, F., Voutsinos, M., Hantke, K., Venugopal, H., Grinter, R.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 78.77 kDa 
• Atom Count: 5,283 
• Modelled Residue Count: 661 
• Deposited Residue Count: 707 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Pyrroloquinoline quinone transporter	A	707	Escherichia coli BW25113	Mutation(s): 0  Gene Names: pqqU, yncD, b1451, JW1446
UniProt
Find proteins for P76115 (Escherichia coli (strain K12)) Explore P76115  Go to UniProtKB:  P76115

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PQQ (Subject of Investigation/LOI)	C [auth A]	PYRROLOQUINOLINE QUINONE C14 H6 N2 O8 MMXZSJMASHPLLR-UHFFFAOYSA-N
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 1.99 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-06-19 
Deposition Author(s): Munder, F., Venugopal, H., Grinter, R.

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Funding Organization	Location	Grant Number
National Health and Medical Research Council (NHMRC, Australia)	Australia	APP1197376
Australian Research Council (ARC)	Australia	DP230102150
Australian Research Council (ARC)	Australia	LE200100045
Australian Research Council (ARC)	Australia	LE120100090

Revision History  

• Version 1.0: 2024-06-19
  Type: Initial release