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Figure 3 | Biology Direct

Figure 3

From: Gene gain and loss events in Rickettsia and Orientiaspecies

Figure 3

Gene loss in Rickettsia spp. The " proto-Rickettsiae" genome probably contained 1,027 genes. R. bellii showed no gene loss. The TG lost the largest number of genes, followed by R. canadensis and R. akari. The gene loss that occurred during the separation of the SFG from the TG mainly involves genes coding for metabolism and information storage and processing. Losses at species level equally affect genes of all functions. The figure represents the species tree as deduced from the concatenation of whole core gene of 11 Rickettsia spp. [Merhej et al., 2009 [24]]. Numbers at arrows show the number of lost genes. Genes were classified into four functional categories: information storage and processing in pink, cellular processes and signaling in green, metabolism in blue and poorly characterized functions in grey. Numbers in the colored squares indicate the percentage of lost genes in the corresponding category. Gain penalty was set at five using PARS algorithm.

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