Most aerobic endospore-forming bacteria are currently assembled in the large genus Bacillus. Members of this genus are normally soil organisms with their primary habitat on decaying plant material. They can be isolated nearly ubiquitously because their highly resistant endospores are easily disseminated with the dust. Table 12.2 summarizes the features of the Bacillus genomes mentioned in this review. Bacilli have little involvement in human or mammalian pathogenic pro-

Table 12.2 Summary of Bacillus spp. genomes discussed in the text.

Organism Replicon Size (bp) Number of % G+C Prophages rRNA tRNA

genes operons

. anthracis Ames

Chromosome pXO1 pXO2 . cereus ATCC 14579

Chromosome pBClin . cereus ATCC 10987

Chromosome pBC10987 . cereus G9241

Chromosome pBCX01 pBC218 . licheniformis


. subtilis 168


5 227 293 5508

181677 217

94829 113

5 426 909 5366 15 100 (linear) 21

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