Bacteria of the phylum Planctomycetota inhabit a wide spectrum of natural and anthropogenic environments. Their very large genomes have a high glycolytic potential due to a wide range of encoded glycoside hydrolases. This work is devoted to the study of the genetic diversity of potential α-galactosidases and α-N-acetylgalactosaminidases in planctomycetes. Analysis of genomic and metagenomic sequences revealed the presence in planctomycetes of genes encoding proteins of all previously known families of glycoside hydrolases containing experimentally characterized enzymes of these two types. Phylogenetic analysis demonstrated multiple lateral transfers of these genes from bacteria of diverse phyla. The proteins encoded in the genomes of the Humisphaera borealis and Paludisphaera mucosa type strains are examined in detail.
D.G. Naumoff (Wed,) studied this question.