9XGA | pdb_00009xga

Structure of the Complex between Non-Heme Iron and Alpha-Ketoglutarate-Dependent Halogenase SyrB2 and Carrier Protein SyrB1

• PDB DOI: https://doi.org/10.2210/pdb9XGA/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Pseudomonas syringae pv. syringae
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2025-10-29 Released: 2026-11-04 
• Deposition Author(s): Zhou, J.H., Huang, J.Y.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.72 Å
• R-Value Free: 
  0.209 (Depositor), 0.210 (DCC) 
• R-Value Work: 
  0.181 (Depositor), 0.181 (DCC) 
• R-Value Observed: 
  0.182 (Depositor) 

Starting Model: experimental

Literature

Structure of the Complex between Non-Heme Iron and Alpha-Ketoglutarate-Dependent Halogenase SyrB2 and Carrier Protein SyrB1

Zhou, J.H., Huang, J.Y.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 102.26 kDa 
• Atom Count: 3,272 
• Modeled Residue Count: 386 
• Deposited Residue Count: 924 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
L-threonyl-[L-threonyl-carrier protein] 4-chlorinase	A	310	Pseudomonas syringae pv. syringae	Mutation(s): 0  Gene Names: syrB2 EC: 1.14.20.15
UniProt
Find proteins for Q9RBY6 (Pseudomonas syringae pv. syringae) Explore Q9RBY6  Go to UniProtKB:  Q9RBY6

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Syringomycin synthase SyrB1	B	614	Pseudomonas syringae pv. syringae	Mutation(s): 0  Gene Names: syrB1 EC: 6.2.1.70
UniProt
Find proteins for Q52400 (Pseudomonas syringae pv. syringae) Explore Q52400  Go to UniProtKB:  Q52400

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AKG (Subject of Investigation/LOI)	C [auth A]	2-OXOGLUTARIC ACID C5 H6 O5 KPGXRSRHYNQIFN-UHFFFAOYSA-N
FE (Subject of Investigation/LOI)	D [auth A]	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N
CL (Subject of Investigation/LOI)	E [auth A], F [auth A], G [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Modified Residue	Modification Type	Formula	2D Diagram
4HH	B	SER	4-Phosphopantetheine	C14 H28 N3 O9 P S

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.72 Å
• R-Value Free:  0.209 (Depositor), 0.210 (DCC) 
• R-Value Work:  0.181 (Depositor), 0.181 (DCC) 
• R-Value Observed: 0.182 (Depositor) 

Space Group: I 4 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 263.711	α = 90
b = 263.711	β = 90
c = 263.711	γ = 90

Software Package:

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

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-11-04 
Deposition Author(s): Zhou, J.H., Huang, J.Y.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2026-11-04
  Type: Initial release