Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 29.19 kDa 
• Atom Count: 2480 
• Residue Count: 254 
• Unique protein chains: 1

6U1Z

Crystal Structure of Ketosteroid Isomerase from Pseudomonas Putida (pKSI) at 280 K

• DOI: 10.2210/pdb6U1Z/pdb

• Classification: ISOMERASE
• Organism(s): Pseudomonas putida
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2019-08-18 Released: 2020-08-19 
• Deposition Author(s): Yabukarski, F., Herschlag, D.
• Funding Organization(s): National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.167 
• R-Value Work: 0.136 
• R-Value Observed: 0.138 

Literature

Assessing active site positioning and testing catalytic proposals via ketosteroid isomerase conformational ensembles

Yabukarski, F., Herschlag, D.

To be published.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Steroid Delta-isomerase	A, B	131	Pseudomonas putida	Mutation(s): 0  Gene Names: ksi EC: 5.3.3.1
Find proteins for P07445 (Pseudomonas putida) Explore P07445  Go to UniProtKB:  P07445

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	A, B	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG	B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.167 
• R-Value Work: 0.136 
• R-Value Observed: 0.138 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.028	α = 90
b = 73.938	β = 90
c = 95.691	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-08-18 
• Released Date: 2020-08-19 
Deposition Author(s): Yabukarski, F., Herschlag, D.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, United States)	United States	MCB-1714723

Revision History 

• Version 1.0: 2020-08-19
  Type: Initial release