Niche adaptation and genome expansion in the chlorophyll d-producing cyanobacterium Acaryochloris marina.

ABSTRACT: Acaryochloris marina is a unique cyanobacterium that is able to produce chlorophyll d as its primary photosynthetic pigment and thus efficiently use far-red light for photosynthesis. Acaryochloris species have been isolated from marine environments in association with other oxygenic phototrophs, which may have driven the niche-filling introduction of chlorophyll d. To investigate these unique adaptations, we have sequenced the complete genome of A. marina. The DNA content of A. marina is composed of 8.3 million base pairs, which is among the largest bacterial genomes sequenced thus far. This large array of genomic data is distributed into nine single-copy plasmids that code for >25% of the putative ORFs. Heavy duplication of genes related to DNA repair and recombination (primarily recA) an

SUBMITTER: Swingley WD 

PROVIDER: S-EPMC2538872 | biostudies-literature | 2008 Feb

REPOSITORIES: biostudies-literature