6DTC

Dihydrofolate Reductase (DHFR) of Aspergillus flavus in complex with a small molecule inhibitor

• PDB DOI: https://doi.org/10.2210/pdb6DTC/pdb

• Classification: antifungal protein/inhibitor
• Organism(s): Aspergillus flavus NRRL3357
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2018-06-15 Released: 2019-06-19 
• Deposition Author(s): Bensen, D.C., Fortier, J.M., Akers-Rodriguez, S., Tari, L.W.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.268 
• R-Value Work: 0.213 
• R-Value Observed: 0.216 

Literature

Prospecting for broad-spectrum inhibitors of fungal dihydrofolate reductase using a structure guided approach.

Bensen, D.C., Fortier, J.M., Akers-Rodriguez, S., Tari, L.W.

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 Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 29.4 kDa 
• Atom Count: 2,149 
• Modelled Residue Count: 244 
• Deposited Residue Count: 256 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Dihydrofolate reductase	A	256	Aspergillus flavus NRRL3357	Mutation(s): 0  Gene Names: AFLA_046100
UniProt
Find proteins for B8NBN5 (Aspergillus flavus (strain ATCC 200026 / FGSC A1120 / IAM 13836 / NRRL 3357 / JCM 12722 / SRRC 167)) Explore B8NBN5  Go to UniProtKB:  B8NBN5

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAP	B [auth A]	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C21 H28 N7 O17 P3 XJLXINKUBYWONI-NNYOXOHSSA-N
H9G	C [auth A]	(3R)-3-methyl-4-[3-(1H-tetrazol-5-yl)phenoxy]-2,3-dihydrofuro[2,3-f]quinazoline-7,9-diamine C18 H16 N8 O2 HXCFGIFBIXRFOX-QMMMGPOBSA-N
SO4	D [auth A], E [auth A], F [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.268 
• R-Value Work: 0.213 
• R-Value Observed: 0.216 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.68	α = 90
b = 77.68	β = 90
c = 120.921	γ = 120

Software Package:

Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-06-19 
Deposition Author(s): Bensen, D.C., Fortier, J.M., Akers-Rodriguez, S., Tari, L.W.

Revision History  

• Version 1.0: 2019-06-19
  Type: Initial release
  
• Version 1.1: 2023-10-11
  Changes: Data collection, Database references, Refinement description