ISDA

Entry Detail

PDB ID:

3SQY

Keywords:

OXIDOREDUCTASE/OXIDOREDUCTASE INHIBITOR

Title:

S. aureus Dihydrofolate Reductase complexed with novel 7-aryl-2,4-diaminoquinazolines

Biological Source:

Source Organism:

Staphylococcus aureus

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2011-07-06

Release Date:

2011-08-31

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.50 Å

R-Value Free:

0.20

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 61 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Dihydrofolate reductase
Chain IDs:A (auth: X)
Chain Length:167
Number of Molecules:1
Biological Source:Staphylococcus aureus

UniProt ID:P0A017 Pfam ID:PF00186 EC:1.5.1.3

Ligand Molecules

NAP

Q11

Primary Citation

Structure-based design of new DHFR-based antibacterial agents: 7-aryl-2,4-diaminoquinazolines.

Li, X, Hilgers, M, Cunningham, M, Chen, Z, Trzoss, M, Zhang, J, Kohnen, L, Lam, T, Creighton, C, Gc, K, Nelson, K, Kwan, B, Stidham, M, Brown-Driver, V, Shaw, K.J, Finn, J.Show

Bioorg.Med.Chem.Lett. 21 5171 5176 (2011)

PMID: 21831637 DOI: 10.1016/j.bmcl.2011.07.059

Abstact

Dihydrofolate reductase (DHFR) inhibitors such as trimethoprim (TMP) have long played a significant role in the treatment of bacterial infections. Not surprisingly, after decades of use there is now bacterial resistance to TMP and therefore a need to develop novel antibacterial agents with expanded spectrum including these resistant strains. In this study, we investigated the optimization of 2,4-diamnoquinazolines for antibacterial potency and selectivity. Using structure-based drug design, several 7-aryl-2,4-diaminoquinazolines were discovered that have excellent sub-100 picomolar potency against bacterial DHFR. These compounds have good antibacterial activity especially on gram-positive pathogens including TMP-resistant strains.

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