Identification of Antibiotic Stress-Inducible Promoters: A Systematic Approach to Novel Pathway-Specific Reporter Assays for Antibacterial Drug Discovery

Table 1.

Reference Compendium Compounds and Their Underlying Mechanisms of Action (MOA)


Compound

MOA

MIC (μg/mL)

Applied concentrations (μg/mL) (L; H)

Treatment times (min) (1; 2)

No. of replicates (condition L1/L2/H1/H2)
Novobiocin DNA synthesis 2.000 0.40; 4.00 10; 40 3/3/3/3
Trimethoprim DNA synthesis 0.500 0.05; 0.50 10; 40 3/2/3/3
Actinonin Translation 16.000 3.20; 32.00 10; 40 3/3/3/3
Azithromycin Translation 1.000 0.20; 2.00 10; 40 3/3/3/3
Vancomycin Cell wall synthesis 0.250 0.05; 0.50 10; 40 3/3/3/3
Methicillin Cell wall synthesis 0.125 0.13; 0.25 10; 40 3/3/3/3
Triclosan Fatty acid synthesis 1.000 0.10; 1.00 10; 40 3/0/3/2
Cerulenin Fatty acid synthesis 16.000 3.20; 32.00 10; 40 2/11/0/3
Polymyxin B Unspecific 16.000 1.60; 16.00 10; 40 3/2/2/3
Monensin
Unspecific
4.300
0.43; 4.30
10; 40
2/3/3/3
  • Overall, 10 different compounds were used in this study, eight antibiotics belonging to four major MOA classes and two “unspecific” compounds acting on the cell membrane (see text). The last column provides the number of replicate experiments for the combinations of high versus low dosage together with short versus long time exposure (low-early/low-late/high-early/high-late; see Methods).

This Article

  1. Genome Res. 14: 90-98

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