3HX8

Crystal structure of putative ketosteroid isomerase (NP_103587.1) from Mesorhizobium loti at 1.45 A resolution

• PDB DOI: https://doi.org/10.2210/pdb3HX8/pdb

• Classification: ISOMERASE
• Organism(s): Mesorhizobium loti
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-06-19 Released: 2009-07-07 
• Deposition Author(s): Joint Center for Structural Genomics (JCSG)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.186 
• R-Value Work: 0.147 
• R-Value Observed: 0.149 

Literature

Crystal structure of putative ketosteroid isomerase (NP_103587.1) from MESORHIZOBIUM LOTI at 1.45 A resolution

Joint Center for Structural Genomics (JCSG)

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)

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 57.54 kDa 
• Atom Count: 4,787 
• Modelled Residue Count: 509 
• Deposited Residue Count: 516 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
putative ketosteroid isomerase	A, B, C, D	129	Mesorhizobium loti	Mutation(s): 0  Gene Names: mlr2180, NP_103587.1
UniProt
Find proteins for Q98IZ3 (Mesorhizobium japonicum (strain LMG 29417 / CECT 9101 / MAFF 303099)) Explore Q98IZ3  Go to UniProtKB:  Q98IZ3

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PG4	J [auth C], K [auth C], M [auth D]	TETRAETHYLENE GLYCOL C8 H18 O5 UWHCKJMYHZGTIT-UHFFFAOYSA-N
IMD	F [auth A], G [auth A], N [auth D]	IMIDAZOLE C3 H5 N2 RAXXELZNTBOGNW-UHFFFAOYSA-O
UNL	E [auth A], H [auth B], I [auth C], L [auth D]	Unknown ligand RAXXELZNTBOGNW-UHFFFAOYSA-O

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C, D	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.186 
• R-Value Work: 0.147 
• R-Value Observed: 0.149 
• Space Group: P 1
• Diffraction Data: https://doi.org/10.18430/M33HX8

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.336	α = 69.02
b = 55.111	β = 76.89
c = 56.862	γ = 64.83

Software Package:

Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SHELXD	phasing
autoSHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-07-07 
Deposition Author(s): Joint Center for Structural Genomics (JCSG)

Revision History  

• Version 1.0: 2009-07-07
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-10-25
  Changes: Author supporting evidence, Refinement description
• Version 1.3: 2019-07-24
  Changes: Data collection, Derived calculations, Refinement description
• Version 1.4: 2023-02-01
  Changes: Database references, Derived calculations
• Version 1.5: 2024-10-16
  Changes: Data collection, Structure summary