9DYC | pdb_00009dyc

The crystal structure of F182A CYP199A4 bound to 4-ethylbenzoic acid

• PDB DOI: https://doi.org/10.2210/pdb9DYC/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Rhodopseudomonas palustris HaA2
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2024-10-13 Released: 2025-08-20 
• Deposition Author(s): Podgorski, M.N., Bell, S.G.
• Funding Organization(s): Australian Research Council (ARC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 
  0.230 (Depositor), 0.232 (DCC) 
• R-Value Work: 
  0.192 (Depositor), 0.192 (DCC) 
• R-Value Observed: 
  0.194 (Depositor) 

Starting Model: experimental

Literature

Comparing and Combining Alternative Strategies for Enhancing Cytochrome P450 Peroxygenase Activity

Podgorski, M.N., Bell, S.G.

(2025) ACS Catal 15: 5191-5210

• DOI: https://doi.org/10.1021/acscatal.4c07486

Biological Assembly 1  

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

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

Macromolecule Content 

• Total Structure Weight: 45.31 kDa 
• Atom Count: 3,405 
• Modeled Residue Count: 393 
• Deposited Residue Count: 410 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome P450	A	410	Rhodopseudomonas palustris HaA2	Mutation(s): 1  Gene Names: RPB_3613
UniProt
Find proteins for Q2IU02 (Rhodopseudomonas palustris (strain HaA2)) Explore Q2IU02  Go to UniProtKB:  Q2IU02

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	B [auth A]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
EGM (Subject of Investigation/LOI)	C [auth A]	4-ethylbenzoic acid C9 H10 O2 ZQVKTHRQIXSMGY-UHFFFAOYSA-N
CL	D [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free:  0.230 (Depositor), 0.232 (DCC) 
• R-Value Work:  0.192 (Depositor), 0.192 (DCC) 
• R-Value Observed: 0.194 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.365	α = 90
b = 51.525	β = 92.24
c = 79.635	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-08-20 
Deposition Author(s): Podgorski, M.N., Bell, S.G.

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Funding Organization	Location	Grant Number
Australian Research Council (ARC)	Australia	--

Revision History  

• Version 1.0: 2025-08-20
  Type: Initial release