TABLE 5.
Comparison of encoded efflux-mediated heavy metal resistance systems among the genomes of T. denitrificans and other selected bacteria
| Bacterial species | Genome size (Mbp) | No. of HME RNDs | No. of CDF | No. of CPx-type ATPases |
|---|---|---|---|---|
| Thiobacillus denitrificansa | 2.9 | 5 | 3 | 3 |
| Geobacter sulfurreducens PCAa | 3.8 | 3 | 2 | 2 |
| Ralstonia metalliduransb | 6.9 | 12 | 3 | 5 |
| Pseudomonas aeruginosab | 6.3 | 1 | 3 | 4 |
| Escherichia colib | 4.6 | 1 | 2 | 2 |
a
Putative heavy metal-exporting protein families for T. denitrificans and G. sulfurreducens PCA (GenBank AE01780) were identified as described by Nies (55). Confirmatory data on metal transport in G. sulfurreducens was obtained from an unpublished source (H. A. Vrionis and D. R. Lovley, 105th Gen. Meet. Am. Soc. Microbiol., poster I-054, 2005).
b
From Nies (55).