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Table 2 Effects of oxygen and nitrate on the expression of denitrification genes in ΔMgfnr mutant

From: The oxygen sensor MgFnr controls magnetite biomineralization by regulation of denitrification in Magnetospirillum gryphiswaldense

Promoter Microaerobic conditions Aerobic conditions
+ NO3 - - NO3 - + NO3 - - NO3 -
nap 79.5 ± 41.8a 67.0 ± 29.4 79.6 ± 38.5 85.4 ± 30.9
(16.2 ± 1.4)b (15.9 ± 0.8) (30.8 ± 2.6) (28.6 ± 2.8)
nirS 266.3 ± 10.8 76.5 ± 28.3 85.4 ± 23.0 88.4 ± 54.9
(124.0 ± 5.5) (21.2 ± 9.6) (14.2 ± 7.9) (18.3 ± 7.8)
nor 414.7 ± 52.8 150.9 ± 52.4 559.7 ± 74.0 493.4 ± 52.9
(762.8 ± 37.0) (221.5 ± 52.4) (204.4 ± 41.1) (151.1 ± 10.5)
nosZ 327.8 ± 32.9 153.2 ± 62.5 751.3 ± 76.1 525.7 ± 53.6
(519.0 ± 43.4) (118.3 ± 33.3) (146.6 ± 34.7) (152.5 ± 21.9)
  1. aValues of β-glucuronidase activity are averages and standard deviations for at least two replicate cultures. Units are recorded as nanomoles of product formed per minute per mg protein.
  2. bExpression in the WT are shown in the “()” for comparison [5].