1DOB

THE MOBIL FLAVIN OF 4-OH BENZOATE HYDROXYLASE: MOTION OF A PROSTHETIC GROUP REGULATES CATALYSIS

• PDB DOI: https://doi.org/10.2210/pdb1DOB/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Pseudomonas aeruginosa
• Mutation(s): No 


• Deposited: 1994-09-06 Released: 1994-11-30 
• Deposition Author(s): Gatti, D.L., Palfey, B.A., Lah, M.S., Entsch, B., Massey, V., Ballou, D.P., Ludwig, M.L.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.205 
• R-Value Observed: 0.205 

Literature

The mobile flavin of 4-OH benzoate hydroxylase.

Gatti, D.L., Palfey, B.A., Lah, M.S., Entsch, B., Massey, V., Ballou, D.P., Ludwig, M.L.

(1994) Science 266: 110-114

• PubMed: 7939628 
• DOI: https://doi.org/10.1126/science.7939628
• Primary Citation of Related Structures:  
  1DOB, 1DOC, 1DOD, 1DOE


• PubMed Abstract: 
  

  Para-hydroxybenzoate hydroxylase inserts oxygen into substrates by means of the labile intermediate, flavin C(4a)-hydroperoxide. This reaction requires transient isolation of the flavin and substrate from the bulk solvent. Previous crystal structures have revealed the position of the substrate para-hydroxybenzoate during oxygenation but not how it enters the active site. In this study, enzyme structures with the flavin ring displaced relative to the protein were determined, and it was established that these or similar flavin conformations also occur in solution. Movement of the flavin appears to be essential for the translocation of substrates and products into the solvent-shielded active site during catalysis.

---

Organizational Affiliation: 

Department of Biological Chemistry, University of Michigan, Ann Arbor 48109.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 45.29 kDa 
• Atom Count: 3,368 
• Modelled Residue Count: 394 
• Deposited Residue Count: 394 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
P-HYDROXYBENZOATE HYDROXYLASE	A	394	Pseudomonas aeruginosa	Mutation(s): 0  EC: 1.14.13.2
UniProt
Find proteins for P20586 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore P20586  Go to UniProtKB:  P20586

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FAD	B [auth A]	FLAVIN-ADENINE DINUCLEOTIDE C27 H33 N9 O15 P2 VWWQXMAJTJZDQX-UYBVJOGSSA-N
PHB	C [auth A]	P-HYDROXYBENZOIC ACID C7 H6 O3 FJKROLUGYXJWQN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Work: 0.205 
• R-Value Observed: 0.205 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.9	α = 90
b = 145.94	β = 90
c = 88.4	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-11-30 
Deposition Author(s): Gatti, D.L., Palfey, B.A., Lah, M.S., Entsch, B., Massey, V., Ballou, D.P., Ludwig, M.L.

Revision History  

• Version 1.0: 1994-11-30
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references, Derived calculations