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Table 3 In vitro growth inhibition of M tuberculosis and M. marinum by aminooxy compounds. One hundred μL of a mid-logarithmic culture of M. tuberculosis or M. marinum at a concentration of 2 × 105 cfu/ml was added to 100 μL of serial doubling dilutions of inhibitor in a 96-well microtitre plate. The drug plates were grown for 14 days at 37°C (M. tuberculosis) or 8 days at 30°C (M. marinum) with no agitation before checking for cell growth at A650 nm. The minimum inhibitory concentration (MIC) and inhibitory concentration 50% (IC50) were calculated as described in the Methods section.

From: Branched-chain amino acid aminotransferase and methionine formation in Mycobacterium tuberculosis

Inhibitor

M. marinum (n = 8)

M. tuberculosis (n = 6)

 

MIC (mM)

IC50 (μM)

MIC (mM)

IC50 (μM)

O-allylhydroxylamine

0.078

8.49 ± 1.96

0.156

39.22 ± 2.01

carboxymethoxylamine

0.313

89.32 ± 7.65

0.313

70.99 ± 7.83

O-benzylhydroxylamine

1.25

410.76 ± 67.10

1.25

467.54 ± 62.80

canaline

1.25

335.29 ± 13.64

1.25

273.18 ± 14.64

O-(t-butyl)hydroxylamine

10

43.18 ± 10.51

10

130.52 ± 23.10