6DE4

Homo sapiens dihydrofolate reductase complexed with beta-NADPH and 3'-[(2R)-4-(2,4-diamino-6-ethylphenyl)but-3-yn-2-yl]-5'-methoxy-[1,1'-biphenyl]-4-carboxylic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Drugging the Folate Pathway in Mycobacterium tuberculosis: The Role of Multi-targeting Agents.

Hajian, B.Scocchera, E.Shoen, C.Krucinska, J.Viswanathan, K.G-Dayanandan, N.Erlandsen, H.Estrada, A.Mikusova, K.Kordulakova, J.Cynamon, M.Wright, D.

(2019) Cell Chem Biol 26: 781-791.e6

  • DOI: https://doi.org/10.1016/j.chembiol.2019.02.013
  • Primary Citation of Related Structures:  
    6DDP, 6DDS, 6DDW, 6DE4, 6DE5

  • PubMed Abstract: 

    The folate biosynthetic pathway offers many druggable targets that have yet to be exploited in tuberculosis therapy. Herein, we have identified a series of small molecules that interrupt Mycobacterium tuberculosis (Mtb) folate metabolism by dual targeting of dihydrofolate reductase (DHFR), a key enzyme in the folate pathway, and its functional analog, Rv2671. We have also compared the antifolate activity of these compounds with that of para-aminosalicylic acid (PAS). We found that the bioactive metabolite of PAS, in addition to previously reported activity against DHFR, inhibits flavin-dependent thymidylate synthase in Mtb, suggesting a multi-targeted mechanism of action for this drug. Finally, we have shown that antifolate treatment in Mtb decreases the production of mycolic acids, most likely due to perturbation of the activated methyl cycle. We conclude that multi-targeting of the folate pathway in Mtb is associated with highly potent anti-mycobacterial activity.


  • Organizational Affiliation

    Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dihydrofolate reductase
A, B
186Homo sapiensMutation(s): 0 
Gene Names: DHFR
EC: 1.5.1.3
UniProt & NIH Common Fund Data Resources
Find proteins for P00374 (Homo sapiens)
Explore P00374 
Go to UniProtKB:  P00374
PHAROS:  P00374
GTEx:  ENSG00000228716 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00374
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NDP
Query on NDP

Download Ideal Coordinates CCD File 
C [auth A],
J [auth B]
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
G6Y
Query on G6Y

Download Ideal Coordinates CCD File 
D [auth A],
K [auth B]
3'-[(2R)-4-(2,4-diamino-6-ethylpyrimidin-5-yl)but-3-yn-2-yl]-5'-methoxy[1,1'-biphenyl]-4-carboxylic acid
C24 H24 N4 O3
OKJCHFXBCVXSIZ-AWEZNQCLSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
O [auth B],
P [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL

Download Ideal Coordinates CCD File 
F [auth A],
G [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
EOH
Query on EOH

Download Ideal Coordinates CCD File 
H [auth A],
I [auth A],
Q [auth B],
R [auth B]
ETHANOL
C2 H6 O
LFQSCWFLJHTTHZ-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
L [auth B],
M [auth B]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth A],
N [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Binding Affinity Annotations 
IDSourceBinding Affinity
G6Y BindingDB:  6DE4 Ki: 234 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.611α = 90
b = 104.66β = 90
c = 144.333γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI104841

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2019-07-10
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Refinement description