Inter-genomic displacement via lateral gene transfer of bacterial trp operons in an overall context of vertical genealogy

Table 2 Complete genomes where Trp-pathway genes were lost via reductive evolution

Bacterial organisms	No pathway	Incomplete pathway
Bdellovibrio bacteriovorus	√
Borrelia burgdorferi	√
Chlamydia muridarum		√
Chlamydia trachomatis		√
Chlamydophila pneumoniae	√
Chlamydophila psittaci ^a	√	√
Clostridium difficile	√
Clostridium perfringens	√
Clostridium tetani	√
Coxiella burnetti		√
Enterococcus faecalis	√
Fusobacterium nucleatum		√
Haemophilus ducreyi	√
Lactobacillus johnsonii	√
Mycoplasma genitalium	√
Mycoplasma mycoides	√
Mycoplasma pneumoniae	√
Phytoplasma asteris	√
Porphyromonas gingivalis	√
Rickettsia prowazekii	√
Streptococcus agalactiae	√
Streptococcus equi	√
Streptococcus pyogenes	√
Treponema denticola	√
Treponema pallidum	√
Tropheryma whipplei	√
Ureaplasma urealyticum	√
Wigglesworthia glossinidia ^b	√
Wolbachia sp.^b	√
Yesinia pestis KIM		√

^aBut see [10] for a description of how an incomplete Trp pathway has been joined with other genes to yield a mosaic operon with a novel function. ^bInsect endosymbiont.

ISSN: 1741-7007