9Q21 | pdb_00009q21

FphA, Staphylococcus aureus fluorophosphonate-binding serine hydrolases A, apo form, crystal form 2

• PDB DOI: https://doi.org/10.2210/pdb9Q21/pdb

• Classification: HYDROLASE
• Organism(s): Staphylococcus aureus subsp. aureus USA300
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2025-08-14 Released: 2026-08-26 
• Deposition Author(s): You, X., Fellner, M.
• Funding Organization(s): Not funded

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 
  0.201 (Depositor), 0.204 (DCC) 
• R-Value Work: 
  0.178 (Depositor), 0.182 (DCC) 
• R-Value Observed: 
  0.179 (Depositor) 

Starting Model: experimental

Literature

FphA, Staphylococcus aureus fluorophosphonate-binding serine hydrolases A, apo form, crystal form 2

You, X., Fellner, M.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: SAXS

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 104.47 kDa 
• Atom Count: 8,296 
• Modeled Residue Count: 906 
• Deposited Residue Count: 906 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carboxylic ester hydrolase	A, B	453	Staphylococcus aureus subsp. aureus USA300	Mutation(s): 0  Gene Names: pnbA, SAUSA300_2396 EC: 3.1.1
UniProt
Find proteins for A0A0H2XHF0 (Staphylococcus aureus (strain USA300)) Explore A0A0H2XHF0  Go to UniProtKB:  A0A0H2XHF0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free:  0.201 (Depositor), 0.204 (DCC) 
• R-Value Work:  0.178 (Depositor), 0.182 (DCC) 
• R-Value Observed: 0.179 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 166.506	α = 90
b = 56.192	β = 109.16
c = 117.063	γ = 90

Software Package:

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

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-08-26 
Deposition Author(s): You, X., Fellner, M.

---

Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2026-08-26
  Type: Initial release