4XK1 | pdb_00004xk1

Crystal Structure of a Phosphoserine/phosphohydroxythreonine Aminotransferase (PSAT) from Pseudomonas aeruginosa with cofactor Pyridoxal Phosphate and bound Glutamate

• PDB DOI: https://doi.org/10.2210/pdb4XK1/pdb

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


• Deposited: 2015-01-09 Released: 2015-02-04 
• Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 
  0.219 (Depositor), 0.220 (DCC) 
• R-Value Work: 
  0.179 (Depositor), 0.180 (DCC) 
• R-Value Observed: 
  0.181 (Depositor) 

Literature

Crystal Structure of a Phosphoserine/phosphohydroxythreonine Aminotransferase (PSAT) from Pseudomonas aeruginosa with cofactor Pyridoxal Phosphate and bound Glutamate

SSGCID, Dranow, D.M., Abendroth, J., Lorimer, D., Edwards, T.E.

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: 82.78 kDa 
• Atom Count: 5,629 
• Modelled Residue Count: 702 
• Deposited Residue Count: 738 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphoserine aminotransferase	A, B	369	Pseudomonas aeruginosa PAO1	Mutation(s): 0  Gene Names: serC, PA3167 EC: 2.6.1.52
UniProt
Find proteins for Q9HZ66 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore Q9HZ66  Go to UniProtKB:  Q9HZ66

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GLU	F [auth B]	GLUTAMIC ACID C5 H9 N O4 WHUUTDBJXJRKMK-VKHMYHEASA-N
FMT	C [auth A], D [auth A], E [auth B]	FORMIC ACID C H2 O2 BDAGIHXWWSANSR-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
LLP	A, B	L-PEPTIDE LINKING	C14 H22 N3 O7 P		LYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free:  0.219 (Depositor), 0.220 (DCC) 
• R-Value Work:  0.179 (Depositor), 0.180 (DCC) 
• R-Value Observed: 0.181 (Depositor) 

Diffraction Data: https://doi.org/10.18430/M34XK1

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.22	α = 90
b = 72.22	β = 90
c = 268.48	γ = 120

Software Package:

Software Name	Purpose
XSCALE	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
ARP	model building

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-02-04 
Deposition Author(s): Seattle Structural Genomics Center for Infectious Disease (SSGCID)

Revision History  

• Version 1.0: 2015-02-04
  Type: Initial release
  
• Version 2.0: 2017-10-11
  Changes: Data collection, Derived calculations, Non-polymer description, Refinement description, Source and taxonomy, Structure summary
• Version 2.1: 2025-04-02
  Changes: Data collection, Database references, Structure summary