Figure 1

Circular representation of the R. centenum chromosome. (a) Circular representation of the R. centenum chromosome. The different rings represent (from outer to inner) all genes and insertion elements, color-coded by functional category (rings 1 and 2), BLASTx results (E-value = 0.0001) comparing translated R. centenum DNA to R. rubrum (NC_007643) proteins scaled according to percent identity (ring 3), BLASTn results (E-value = 0.0001) comparing R. centenum DNA to R. rubrum DNA (ring 4), deviation from average G+C content (ring 5), and deviation from average GC skew [(C-G)/(C+G); ring 6]. Color codes for gene functional categories are as follows: energy and central intermediary metabolism, green; fatty acid and phospholipid metabolism, turquoise; purine/pyrimidine/nucleoside/nucleotide biosynthesis, salmon; protein synthesis and fate, yellow; cofactor biosynthesis, pink; amino acid synthesis, orange; cellular processes and envelope, light green; DNA metabolism, red; transcription, dark blue; mobile and extra-chromosomal elements, dark green; cell division and chromosomal partitioning, light blue; general function prediction only, brown; unknown function and hypothetical proteins, dark gray. (b) Scanning electron micrograph of a R. centenum mature colony undergoing cyst formation, showing a heterogeneous array of vibrioid-shaped vegetative cells and clusters of spherical cyst cells.