3SA2

Bacuills anthracis Dihydrofolate Reductase bound propargyl-linked TMP analog, UCP1014

• PDB DOI: https://doi.org/10.2210/pdb3SA2/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Bacillus anthracis
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2011-06-02 Released: 2012-06-13 
• Deposition Author(s): Anderson, A.C., Beierlein, J.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.257 
• R-Value Work: 0.234 
• R-Value Observed: 0.235 

Literature

SAR studies of heterocyclic propargyl-linked TMP analogs to Bacillus dihydrofolate reductase

Anderson, A.C., Beierlein, J.M., Viswanathan, K., Wright, D.L.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 41.42 kDa 
• Atom Count: 3,045 
• Modelled Residue Count: 330 
• Deposited Residue Count: 330 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dihydrofolate reductase	A, B	165	Bacillus anthracis	Mutation(s): 1  Gene Names: BAS2083, BA_2237, dfrA, GBAA2237, GBAA_2237 EC: 1.5.1.3
UniProt
Find proteins for Q81R22 (Bacillus anthracis) Explore Q81R22  Go to UniProtKB:  Q81R22

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAP	C [auth A], E [auth B]	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C21 H28 N7 O17 P3 XJLXINKUBYWONI-NNYOXOHSSA-N
7DR	D [auth A], F [auth B]	6-ethyl-5-[3-(5-methoxybiphenyl-3-yl)prop-1-yn-1-yl]pyrimidine-2,4-diamine C22 H22 N4 O QKLZHVMWTSBUFL-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
7DR	BindingDB:  3SA2	Ki: 330 (nM) from 1 assay(s)
		IC50: 973 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.257 
• R-Value Work: 0.234 
• R-Value Observed: 0.235 
• Space Group: P 4₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.265	α = 90
b = 78.265	β = 90
c = 66.997	γ = 90

Software Package:

Software Name	Purpose
d*TREK	data scaling
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
d*TREK	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-06-13 
Deposition Author(s): Anderson, A.C., Beierlein, J.M.

Revision History  

• Version 1.0: 2012-06-13
  Type: Initial release
  
• Version 1.1: 2024-02-28
  Changes: Data collection, Database references, Derived calculations, Refinement description