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: 48.92 kDa 
• Atom Count: 3863 
• Residue Count: 420 
• Unique protein chains: 1

6TAK

Crystal structure of Escherichia coli Orotate Phosphoribosyltransferase in complex with Orotic acid and Sulfate at 1.25 Angstrom resolution

• DOI: 10.2210/pdb6TAK/pdb

• Classification: TRANSFERASE
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2019-10-29 Released: 2020-11-25 
• Deposition Author(s): Navas-Yuste, S., Lopez-Estepa, M., Gomez, S., Fernandez, F.J., Vega, M.C.
• Funding Organization(s): Spanish Ministry of Economy and Competitiveness, Spanish Ministry of Science, Innovation, and Universities, Spanish National Research Council

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 0.206 
• R-Value Work: 0.181 
• R-Value Observed: 0.182 

Literature

Elucidating the Catalytic Reaction Mechanism of Orotate Phosphoribosyltransferase by means of the Adaptive String Method

Roca, M., Navas-Yuste, S., Zinovjev, K., Lopez-Estepa, M., Gomez, S., Fernandez, F.J., Vega, M.C., Tunon, I.

To be published.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Orotate phosphoribosyltransferase	AAA, BBB	213	Escherichia coli K-12	Mutation(s): 0  Gene Names: pyrE, b3642, JW3617 EC: 2.4.2.10
Find proteins for P0A7E3 (Escherichia coli (strain K12)) Explore P0A7E3  Go to UniProtKB:  P0A7E3

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ORO	AAA, BBB	OROTIC ACID C5 H4 N2 O4 PXQPEWDEAKTCGB-UHFFFAOYSA-N
SO4	AAA, BBB	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	AAA, BBB	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 0.206 
• R-Value Work: 0.181 
• R-Value Observed: 0.182 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53.658	α = 90
b = 69.469	β = 90
c = 104.383	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-10-29 
• Released Date: 2020-11-25 
Deposition Author(s): Navas-Yuste, S., Lopez-Estepa, M., Gomez, S., Fernandez, F.J., Vega, M.C.

---

Funding Organization	Location	Grant Number
Spanish Ministry of Economy and Competitiveness	Spain	CTQ2015-66206-C2-2-R
Spanish Ministry of Science, Innovation, and Universities	Spain	RTI2018-1018-102242-B-I00
Spanish National Research Council	Spain	2016E064

Revision History 

• Version 1.0: 2020-11-25
  Type: Initial release