Information based on LPSN 2021 Weizmannia is a genus of Gram-Positive rod-shaped bacteria in the family Bacillaceae from the order Bacillales.
[3] Members of Weizmannia are previously species belonging to Bacillus, a genus that has been recognized as displaying extensive polyphyly and phylogenetic heterogeneity due to the vague criteria[4] (such as the ability to form endospores in the presence of oxygen)[5] previously used to assign species to this clade.
Multiple studies using comparative phylogenetic analyses have been published in an attempt to clarify the evolutionary relationships between Bacillus species, resulting in the establishment of numerous novel genera such as Alkalihalobacillus, Brevibacillus, Solibacillus, Alicyclobacillus, Virgibacillus and Evansella.
Analyses of genome sequences from Weizmannia species identified two conserved signature indels (CSIs) that are exclusively shared by all members of this genus in the proteins acetate kinase and O-methyltransferase.
[1] These CSIs provide a reliable molecular means of distinguishing Weizmannia species from other Bacillaceae genera and bacteria.