1887

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 72, Issue 6

Identification of sp. nov., sp. nov. and sp. nov. and emended description of the genus No Access

Abstract

Three chitinolytic, Gram-negative, light pink, capsule-forming, rod-shaped bacterial strains with gliding motion (MYSH2, MJ1a and dk17) were isolated from seashells, soil and foxtail, respectively. Phylogenetic analysis of the 16S rRNA gene sequences and concatenated alignment of 92 core genes indicated that strains MYSH2, MJ1a and dk17 were novel species of the genus and exhibited a high 16S rRNA sequence similarity (i.e. more than 97.2 %) among each other. These novel strains contained summed feature 3 (C ω7 and/or C ω6), iso-C and MK-7 as the predominant fatty acids and menaquinone. According to the CAZys coding gene of KAAS, MYSH2 and MJ1a were interpreted as strains containing both GH18 and 19 family coding genes, except for dk17, which shows only GH19 family genes. These strains likely degrade chitin to chitobiose or directly to -acetyl--glucosamine, which may enhance their chitinolytic capacity, thus making these stains potentially useful for industrial chitin degradation. Based on distinct morphological, physiological, chemotaxonomic and phylogenetic differences from their closest phylogenetic neighbours, we propose that strains MYSH2, MJ1a and dk17 represent three novel species in the genus , for which the names sp. nov. (=KACC 19716=JCM 32787), sp. nov. (=KACC 19906=NBRC 113667) and sp. nov. (=KACC 19907=NBRC 113666) are proposed. An emended description of the genus is proposed.

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Keyword(s): chitin degradation , gliding motility , Mucilaginibacter and novel species
© 2022 The Authors
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2022-06-14
2024-04-25
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Identification of Mucilaginibacter conchicola sp. nov., Mucilaginibacter achroorhodeus sp. nov. and Mucilaginibacter pallidiroseus sp. nov. and emended description of the genus Mucilaginibacter
Int J Syst Evol Microbiol 72, 005431 (2022); https://doi.org/10.1099/ijsem.0.005431
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