Natural replacement of vertically inherited lux-rib genes of Photobacterium aquimaris by horizontally acquired homologues

作者：Urbanczyk Henryk^*; Furukawa Takashi; Yamamoto Yuki; Dunlap Paul V

来源：Environmental Microbiology Reports, 2012, 4(4): 412-416.

DOI：10.1111/j.1758-2229.2012.00355.x

We report here the first instance of a complete replacement of vertically inherited luminescence genes by horizontally acquired homologues. Different strains of Photobacterium aquimaris contain homologues of the lux-rib genes that have a different evolutionary history. Strain BS1 from the Black Sea contains a vertically inherited lux-rib operon, which presumably arose in the ancestor of this species, whereas the type strain NBRC 104633T, from Sagami Bay, lacks the vertically inherited lux-rib operon and instead carries a complete and functional lux-rib operon acquired horizontally from a bacterium related to Photobacterium mandapamensis. The results indicate that the horizontal acquisition of the lux genes expanded the pan-genome of P. aquimaris, but it did not influence the phylogenetic divergence of this species.

• 出版日期2012-8