[Specification of species status of some colleciton strains of methanotrophs].

Sequence-analysis of genes 16S rRNA has demonstrated the high-level relationship (99%) of the strains Methylobacter ucrainicus UCM B-3159, and Methylobacter marinus A45(T). The strain UCM B-3159 has lower coefficients of similarity (97.4-96.4%) for other species of that genus. These strains are similar as to their phenotypical properties and form one branch on the dendrogram which demonstrates species relations of Methylococcaceae family, that permitted reclassifying M. ucrainicus as M. marinus. Phylogenetic analysis has confirmed the belonging of strains UCM B-3002 and UCM B-3494 to Methylococcus capsulatus species. Those strains were earlier related to this species on the basis of phenotype features.