Table 2. Genes encoding methane monooxygenases in Alphaproteobacteria methanotrophs that were detected as foreign using Alien Hunter compositional analysis.
| Organisms | Enzyme | Genes | Coding loci detected as foreign |
|---|---|---|---|
| Methylocella silvestris | sMMO | mmoXYB | Msil1262_1264 |
| Methylocapsa acidiphila | pMMO | pmoCAB | MetacDRAFT_3746-3748 |
| Methylosinus trichosporium OB3b | sMMO | mmoXYB | MettrDRAFT_2362-2364 |
| Methylosinus trichosporium OB3b | pMMO | pmoCAB | MettrDRAFT_2808-2810 (copy 1) MettrDRAFT_0384-0382 (copy 2) |
| Methylocystis sp. ATCC 49242 | pMMO | pmoCAB | Met49242_2879-2877 (copy 1) Met49242_1455-1453 (copy 2) |
| Methylocystis sp. SC2 | pMMO | pmoCAB | BN69_2826-2828 (copy 1) BN69_3533-3535 (copy 2) |
| Methylocystis sp. SC2 | pMMO2 | pmoCAB2 | BN69_0202-0204 |
Abbreviations: pMMO, particulate methane monooxygenases; sMMO, soluble methane monooxygenase.
The Methylosinus and Methylocystis species possess two nearly identical copies of the pmoCAB1 operon. Methylocystis sp. SC2 also possesses a pmoCAB2 operon, which is divergent from the pmoCAB1 operon and has different kinetic properties (Yimga et al., 2003; Baani and Liesack, 2008). All were detected as compositionally foreign to their respective genomes