Genomic Approaches to Studying the other Members of the Genus Listeria

Complete genomic sequences of at least one strain of each ofthe other species of the genus Listeria will be available soon: the genomes of L. ivanovii Sv5 (PAM 55), L.welshimeri (SLCC5334), and L.seeligeri (SLCC3954) have just been completely sequenced, are 2 928 879bp, 2 814124bp, and 2 797 634bp in size, respectively, and will be published soon (T. Hain, W. Goebel, and T. Chakraborty, unpublished results; P. Glaser, C. Buchrieser, and P. Cossart, unpublished results). The sequencing of L.gray is under way at the Institut Pasteur (P. Glaser, C. Buchrieser, and P. Cossart, unpublished results). Ofthe five completely sequenced species, L. innocua has the largest genome, slightly more than 3 Mbp. The G+C content of all genomes is in the range of 36.8% (L. welshimeri) to 42.2% (L. ivanovii), and the percentage coding ranges from 88.2% (L. welshimeri) to 90.3% (L. monocytogenes and L. innocua).

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