Table 3 Nucleotide pools in E. coli during stringent response. E. coli cultures were grown in defined minimal medium MOPS supplemented with 0.4% glucose at 37 °C with vigorous aeration until OD600 0.5. Then, stringent response was induced by mupirocin at 150 µg/ml (3 × MIC), and samples were withdrawn for nucleotide measurements at times indicated. The data are plotted as a function of time on (Fig. 5). 95% CI: 95% confidence interval. NA: not available.

From: HPLC-based quantification of bacterial housekeeping nucleotides and alarmone messengers ppGpp and pppGpp

Nucleotide

Quotient: mean[95% CI], %

0 min

1 min

2 min

4 min

10 min

15 min

30 min

Adenosines

ATP

79[73;86]

83[73;93]

85[81;90]

86[80;92]

87[80;94]

86[80;93]

82[77;87]

ADP

19[16;23]

13[7.4;24]

12[9.1;16]

11[7.8;16]

10[6.6;16]

13[11;15]

15 [13;18]

AMP

3.4[2.7;4.3]

2.8[1.2;6.7]

2.4[1.7;3.4]

2.4[1.3;4.5]

2.1[1.0;4.1]

3.2[1.9;5.2]

3.7[2.8;4.8]

Guanosines

GTP

73 [67;79]

48[25;92]

30[17;55]

25[7.7;81]

23[9.2;59]

33[23;47]

32[27;39]

GDP

20[16;25]

10[4.6;22]

5.4[2.3;13]

3.6[2.7;4.8]

3.6[1.9;6.7]

5.4[3.3;8.9]

6.2[4.8;8.0]

GMP + IMP

4.4[3.2;6.0]

3.8[1.3;11]

2.3[0.69;7.6]

1.7[0.98;2.8]

2.1[0.98;4.4]

3.4[1.7;6.9]

3.4[2.4;4.9]

ppGpp

1.4[0.85;2.5]

27[14;53]

52[37;72]

60[49;74]

60[45;78]

50[40;61]

47[43;52]

pppGpp

NA

8.4[3.3; 21]

8.7[3.5; 22]

5.6[0.38;81]

6.5[2.0;21]

7.2[4.4;12]

8.9[7.5;10]

NTPs

CTP

11[9.5;12]

14[11;17]

16[13;20]

18[15;21]

20[19;22]

21[19;23]

23[21;25]

UTP

14[13;15]

15[13;17]

16[14;19]

17[16;19]

19[18;19]

20[18;22]

23[22;24]

ATP

52[46;57]

60[51;71]

60[53;67]

57[52;63]

53[47;59]

51[46;56]

44[42;46]

GTP

26[24;28]

15[7.6;28]

10[5.0;22]

9.8[5.5;18]

10[8.2;13]

10[8.0;13]

11[8.8;13]

AEC

ATP, ADP, AMP

87[84;90]

90[84;96]

91[89;94]

92[88;96]

92[88;97]

90[88;93]

88[86;91]