Lacticaseibacillus, Zheng & Wittouck & Salvetti & Franz & Harris & Mattarelli & O’Toole & Pot & Vandamme & Walter & Watanabe & Wuyts & Felis & Gänzle & Lebeer, 2020

Zheng, Jinshui, Wittouck, Stijn, Salvetti, Elisa, Franz, Charles M. A. P., Harris, Hugh M. B., Mattarelli, Paola, O’Toole, Paul W., Pot, Bruno, Vandamme, Peter, Walter, Jens, Watanabe, Koichi, Wuyts, Sander, Felis, Giovanna E., Gänzle, Michael G. & Lebeer, Sarah, 2020, A taxonomic note on the genus Lactobacillus: Description of 23 novel genera, emended description of the genus Lactobacillus Beijerinck 1901, and union of Lactobacillaceae and Leuconostocaceae, International Journal of Systematic and Evolutionary Microbiology 70 (4), pp. 2782-2858 : 2811

DESCRIPTION OF LACTICASEIBACILLUS GEN. NOV.

Lacticaseibacillus (Lac.ti.ca.se.i.ba.cil'lus. L. neut. n. lac milk; L. n. caseus cheese, referring to the casei-group lactobacilli; L. masc. n. bacillus a rod; N.L. masc. n. Lacticaseibacillus a milk-derived rodlet from the [ Lactobacillus ] casei group).

Strains of Lacticaseibacillus are homofermentative; some but not all species metabolise pentoses via the phosphoketolase pathway. The mol % G+C content of DNA is between 46 and 58.0. The genome size ranges from 1.93 to 3.14 Mbp. Strains are non-motile, oxidase negative, often producing D(−)- and L(+)-lactic acid from glucose. The temperature range for growth is variable, but never below 10 °C and never above 45 °C. One subspecies survives 70 °C for 40 s. Lys–D-Asp is the most common type of the peptidoglycan. The genus has considerable economic importance as it harbours several species that are used as starter cultures in dairy fermentations and as probiotics [ 58, 59].

A phylogenetic tree on the basis of 16S rRNA genes of all species in the genus Lacticaseibacillus is provided in Fig. S 6F .

The type species is Lacticaseibacillus casei comb. nov.; Lacticaseibacillus was previously referred to as L. casei group.

Figures

Fig. 6. Gene family presence/absence patterns in Lactobacillaceae and Leuconostocaceae. Each column represents a gene family presence/absence pattern in species of Lactobacillaceae and Leuconostoaceae, where presence is indicated with a dot. The absolute number of gene families that conform to each pattern is visualized in the marginal bar plot at the top. Separations between phylogroups are indicated with horizontal black lines. We defined genes that were present in all genomes of a clade and in none of the genomes outside of that clade as ‘signature genes’ (dark blue); other genes are shown in light blue. Only presence/absence patterns followed by four or more gene families are shown. Patterns of presence in a single species or all species are not shown. Unassigned species are clusters of closely related genomes which could not be assigned to a known species due to low whole-genome similarity to a type strain and/or low 16S rRNA similarity to a type strain.