Affiliation:
1. Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstrasse 7B, 38124 Braunschweig, Germany
2. Helmholtz Centre for Infection Research, Microbial Drugs, Inhoffenstrasse 7, 38124 Braunschweig, Germany
Abstract
The species Archangium gephyra, Angiococcus disciformis, Cystobacter minus and Cystobacter violaceus are currently classified in three different genera of the order Myxococcales. The 16S rRNA gene sequences of the respective type strains show a similarity higher than 98.4 % and form a tight phylogenetic group. A dendrogram calculating the similarity of MALDI-TOF spectra confirmed the close relatedness of the four species that grouped in a monophyletic cluster in the neighbourhood of other species of the genus Cystobacter. The type strains shared similar fatty acid patterns of high complexity with iso-C15 : 0, C16 : 1ω5c and iso-C14 : 0 3-OH as the major components. The vegetative cells of these species are uniformly long needle-shaped rods, and the myxospores are short rods, ovoid or irregularly spherical thus differing from the myxospores of species related to Cystobacter fuscus, the type species of this genus. Some enzymic and hydrolysing reactions of the type strains are described. As a result of the high relatedness and similarity of the four species, it is proposed to place them into one genus, and due to phylogenetic and morphological distinctness, the species should be classified in a genus distinct from the genus Cystobacter as Archangium gephyra (type strain M18T = DSM 2261T = ATCC 25201T = NBRC 100087T), Archangium disciforme comb. nov. (type strain CMU 1T = DSM 52716T = ATCC 33172T), Archangium minus comb. nov. (proposed neotype strain Cb m2 = DSM 14751 = JCM 12627) and Archangium violaceum comb. nov. (type strain Cb vi61T = DSM 14727T = CIP 109131T = JCM 12629T). Since the family Archangiaceae
Jahn 1924 AL has priority over the family Cystobacteraceae
McCurdy 1970 AL, it is proposed to assign the genera Archangium, Anaeromyxobacter, Cystobacter, Hyalangium, Melittangium and Stigmatella to the family Archangiaceae. Emended descriptions of the families Myxococcaceae and Archangiaceae are also provided.
Subject
General Medicine,Ecology, Evolution, Behavior and Systematics,Microbiology
Cited by
13 articles.
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1. Chromosomal organization of biosynthetic gene clusters, including those of nine novel species, suggests plasticity of myxobacterial specialized metabolism;Frontiers in Microbiology;2023-08-03
2. Genome sequencing and multifaceted taxonomic analysis of novel strains of violacein-producing bacteria and non-violacein-producing close relatives;Microbial Genomics;2023-04-13
3. Chromosomal organization of biosynthetic gene clusters suggests plasticity of myxobacterial specialized metabolism including descriptions for nine novel species:Archangium lansiniumsp. nov.,Myxococcus landrumussp. nov.,Nannocystis bainbridgeasp. nov.,Nannocystis poenicansasp. nov.,Nannocystis radixulmasp. nov.,Polyangium mundeleiniumsp. nov.,Pyxidicoccus parkwaysissp. nov.,Sorangium ateriumsp. nov.,Stigmatella ashevillenasp. nov;2023-03-08
4. Trichococcus shcherbakoviae subsp. psychrophilus subsp. nov., a psychrotolerant facultative anaerobe isolated from a cold spring;International Journal of Systematic and Evolutionary Microbiology;2021-10-25
5. Myxobacteria and their products: current trends and future perspectives in industrial applications;Folia Microbiologica;2021-05-31