9KOO | pdb_00009koo

Ligand binding domain of Pseudomonas Aeruginosa PAO1 chemoreceptor PctA in complex with MHF

• PDB DOI: https://doi.org/10.2210/pdb9KOO/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Pseudomonas aeruginosa PAO1
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2024-11-21 Released: 2025-11-26 
• Deposition Author(s): Songying, O., Yanbo, Z., Lei, Z., Xinyu, Q.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 
  0.260 (Depositor), 0.259 (DCC) 
• R-Value Work: 
  0.207 (Depositor), 0.205 (DCC) 

Starting Model: experimental

Literature

Ligand binding domain of Pseudomonas Aeruginosa PAO1 chemoreceptor PctA in complex with MHF

Songying, O., Yanbo, Z., Lei, Z., Xinyu, Q.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content 

• Total Structure Weight: 60.78 kDa 
• Atom Count: 3,788 
• Modeled Residue Count: 470 
• Deposited Residue Count: 556 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Methyl-accepting chemotaxis protein PctA	A, B	278	Pseudomonas aeruginosa PAO1	Mutation(s): 0  Gene Names: pctA, PA4309
UniProt
Find proteins for G3XD24 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore G3XD24  Go to UniProtKB:  G3XD24

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
4XX (Subject of Investigation/LOI)	C [auth A], D [auth B]	4-hydroxy-5-methylfuran-3(2H)-one C5 H6 O3 DLVYTANECMRFGX-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free:  0.260 (Depositor), 0.259 (DCC) 
• R-Value Work:  0.207 (Depositor), 0.205 (DCC) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.972	α = 90
b = 76.166	β = 90
c = 117.802	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-11-26 
Deposition Author(s): Songying, O., Yanbo, Z., Lei, Z., Xinyu, Q.

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

Revision History  

• Version 1.0: 2025-11-26
  Type: Initial release