3IX3

LasR-OC12 HSL complex

• PDB DOI: https://doi.org/10.2210/pdb3IX3/pdb

• Classification: TRANSCRIPTION
• Organism(s): Pseudomonas aeruginosa
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-09-03 Released: 2009-09-15 
• Deposition Author(s): Zou, Y., Nair, S.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.207 
• R-Value Work: 0.168 
• R-Value Observed: 0.170 

Literature

LasR-OC12 HSL complex

Zou, Y., Nair, S.K.

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: 39.24 kDa 
• Atom Count: 3,085 
• Modelled Residue Count: 326 
• Deposited Residue Count: 346 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transcriptional activator protein lasR	A, B	173	Pseudomonas aeruginosa	Mutation(s): 0  Gene Names: lasR, PA1430
UniProt
Find proteins for P25084 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore P25084  Go to UniProtKB:  P25084

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
OHN	C [auth A], D [auth B]	N-3-OXO-DODECANOYL-L-HOMOSERINE LACTONE C16 H27 N O4 PHSRRHGYXQCRPU-AWEZNQCLSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
OHN	BindingDB:  3IX3	EC50: min: 1.5, max: 139 (nM) from 4 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.207 
• R-Value Work: 0.168 
• R-Value Observed: 0.170 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.293	α = 90
b = 67.616	β = 115.04
c = 54.396	γ = 90

Software Package:

Software Name	Purpose
MAR345dtb	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-09-15 
Deposition Author(s): Zou, Y., Nair, S.K.

Revision History  

• Version 1.0: 2009-09-15
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-09-06
  Changes: Data collection, Database references, Derived calculations, Refinement description