Table 1. (p)ppGpp binding and inhibition of HPRT homologs.
| Organism | Relative activityd | Kd (pppGpp) (μM) | IC50 (pppGpp)
(μM) |
|
|---|---|---|---|---|
| 25 μM ppGpp | 25 μM pppGpp | |||
| Actinobacteria | ||||
| Streptomyces coelicolor | −0.01 ± 0.01 | 0.12 ± 0.01 | 1.77 ± 0.31 | 3.8 ± 0.2 |
| Collinsella aerofaciens | 0.31 ± 0.04 | 0.42 ± 0.05 | 1.46 ± 0.56 | |
| Cellulomonas gilvus | NAb | NAb | 0.6 ± 0.11 | |
| Mycobacterium tuberculosis | NAa | NAa | NAc | |
| Bacteroidetes | ||||
| Bacteroides intestinalis | 0.49 ± 0.06 | 0.05 ± 0.01 | 0.11 ± 0.03 | |
| Bacteroides caccae | 0.34 ± 0.03 | 0.01 ± 0.02 | 0.11 ± 0.02 | |
| Bacteroides ovatus | 0.43 ± 0.04 | −0.03 ± 0.02 | 0.15 ± 0.04 | |
| Bacteroides uniformis | 0.4 ± 0.01 | 0.01 ± 0.01 | 0.1 ± 0.04 | |
| Bacteroides thetaiotaomicron | 0.41 ± 0 | 0 ± 0.01 | 0.11 ± 0.04 | |
| Bacteroides finegoldii | 0.46 ± 0.03 | −0.01 ± 0.01 | 0.15 ± 0.06 | |
| Firmicutes | ||||
| Eubacterium ventriosum | −0.03 ± 0.03 | −0.07 ± 0.03 | 0.66 ± 0.1 | |
| Ruminococcus lactaris | −0.01 ± 0 | 0 ± 0 | 0.11 ± 0.03 | |
| Ruminococcus torques | NAb | NAb | 0.22 ± 0.07 | |
| Clostridium leptum | −0.01 ± 0.01 | 0 ± 0 | 3.29 ± 0.94 | |
| Eubacterium eligens | −0.03 ± 0.03 | 0.02 ± 0.01 | 0.79 ± 0.18 | |
| Blautia hansenii | 0.07 ± 0 | 0.14 ± 0.01 | 0.83 ± 0.14 | |
| Eubacterium hallii | 0.17 ± 0.05 | −0.06 ± 0.05 | 0.07 ± 0.02 | |
| Clostridium spiroforme | 0.07 ± 0.01 | 0.17 ± 0 | 9.54 ± 1.17 | |
| Listeria monocytogenes | 0.13 ± 0 | 0.32 ± 0.02 | 0.32 ± 0.06 | |
| Bacillus subtilis | 0.08 ± 0.01 | 0.41 ± 0.01 | 0.75 ± 0.07 | 10.1 ± 1.3 |
| Staphylococcus aureus | 0.31 ± 0.01 | 0.48 ± 0.01 | 2.83 ± 0.38 | 10.6 ± 0.3 |
| Streptococcus mutans | NAb | NAb | 5.12 ± 1.45 | |
| Bacillus anthracis 1 | 0.25 ± 0.01 | 0.5 ± 0.01 | 1.54 ± 0.18 | 29.5 ± 1.2 |
| Enterococcus faecalis | 0.31 ± 0.01 | 0.49 ± 0.02 | 1.12 ± 0.11 | |
| Holdemania filiformis | 0.66 ± 0.01 | 0.43 ± 0 | 0.17 ± 0.11 | |
| Bacillus anthracis 2 | 0.81 ± 0.04 | 0.7 ± 0.05 | 6.18 ± 1.77 | |
| Deinococcus-Thermus | ||||
| Thermus thermophilus | 0.52 ± 0.07 | −0.01 ± 0.01 | 0.04 ± 0.01 | |
| Proteobacteria | ||||
| Caulobacter crescentus | 0.33 ± 0.05 | 0.47 ± 0.07 | 0.24 ± 0.09 | |
| Escherichia coli | 0.33 ± 0.01 | 0.48 ± 0.02 | 3.38 ± 1.47 | 26.2 ± 2.0 |
| Klebsiella pneumoniae | 0.47 ± 0.03 | 0.49 ± 0.01 | 3.38 ± 0.89 | |
| Sinorhizobium meliloti | NAb | NAb | 3.08 ± 0.92 | |
| Yersinia enterocolitica | 0.7 ± 0.01 | 0.7 ± 0.03 | 4.44 ± 1.25 | |
| Photobacterium phosphoreum | 0.97 ± 0.01 | 0.96 ± 0.03 | NAc | >100 |
| Pseudomonas syringae | 0.6 ± 0.01 | 0.6 ± 0.01 | 5.85 ± 1.76 | |
| Pseudomonas aeruginosa | 0.84 ± 0.01 | 0.83 ± 0.02 | 5.28 ± 1.52 | |
| Legionella pneumophila | 0.78 ± 0.01 | 0.69 ± 0.03 | 1.72 ± 0.38 | >100 |
| Coxiella burnetii | 0.79 ± 0.14 | 0.72 ± 0.16 | NAc | >100 |
| Neisseria meningitidis | 0.9 ± 0.02 | 0.8 ± 0.03 | 1.64 ± 0.55 | |
| Eukarya | ||||
| Saccharomyces cerevisiae | 0.64 ± 0.02 | 0.96 ± 0.01 | 8.08 ± 8.58 | |
| Caenorhabditis elegans | NAb | NAb | 12.77 ± 7.68 | 29.6 ± 2.8 |
| Homo sapiens | NA | NA | NA | 66.6 ± 5.4 |
± standard error of the mean.
NA = no data obtained.
aProtein not purified.
bProtein did not have activity.
cInteraction with pppGpp too weak to estimate Kd.
dRelative to activity without ppGpp or pppGpp.