Abstract
A novel Gram-stain-negative, strictly aerobic and bioflocculant-producing bacterium, designated as ASW11-36T, was isolated from an intertidal sand collected from coastal areas of Qingdao, PR China. Growth occurred at 15–40 °C (optimum, 30 °C), pH 7.0–9.0 (optimum, pH 7.5) and with 1.5–7.0% (w/v) NaCl (optimum, 2.5–3.0%). In the whole-cell fatty acid pattern prevailed C16:0 and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). The major isoprenoid quinone was determined to be Q-8 and the major polar lipids were phosphatidylethanolamine (PE) and phosphatidylglycerol (PG), one unidentified aminolipid (AL), one unidentified glycolipid (GL), and two lipids (L1, L2). Based on the phylogenetic analyses of 16S rRNA gene sequences and 618 single-copy orthologous clusters, strain ASW11-36T could represent a novel member of the genus Alteromonas and was closely related to Alteromonas flava P0211T (98.4%) and Alteromonas facilis P0213T (98.3%). The pairwise average nucleotide identity and digital DNA–DNA hybridization values of the ASW11-36T genome assembly against the closely related species genomes were 71.8% and 21.7%, respectively, that clearly lower than the proposed thresholds for species. Based on phenotypic, phylogenetic, and chemotaxonomic analyses, strain ASW11-36T is considered to represent a novel species of the genus Alteromonas, for which the name Alteromonas arenosi sp. nov. is proposed. The type strain is ASW11-36T (= KCTC 82496T = MCCC 1K05585T). In addition, the strain yielded 65% of flocculating efficiency in kaolin suspension with CaCl2 addition. The draft genome of ASW11-36T shared abundant putative CAZy family related genes, especially involved in the biosynthesis of exopolysaccharides, implying its potential environmental and biological applications.
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Data availability
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request or on NCBI repository. The novel strain has been deposited to MCCC 1K05585 and KCTC 82496.
Abbreviations
- MES:
-
2-(4-Morpholino) ethanesulfonic acid
- MOPS:
-
3-(N-Morpholino) propanesulfonic acid
- CHES:
-
2-(Cyclohexylamino) ethanesulfonic acid
- MCCC:
-
Marine culture collection of China
- KCTC:
-
Korean collection for type cultures
- MEGA:
-
Molecular evolutionary genetics analysis
- ANI:
-
Average nucleotide identity
- dDDH:
-
Digital DNA–DNA hybridization
- TLC:
-
Thin-layer chromatography
- CAZY:
-
Carbohydrate-active enzymes
- EPS:
-
Extracellular polymeric substances
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Funding
This work was funded by the National Natural Science Foundation of China (32300115), by the Basic Research Program of Shanxi Province (20210302124004), by the Scientific and Technological Innovation Programs of Shanxi Agricultural University (2020BQ39), by the Basic Research Program of Shanxi Province (20210302123368), by the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi Province (2021L134) and by the Excellent Talents Come to Shanxi to Reward Scientific Research Projects (SXYBKY2019025).
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BL and JYS designed the experiments and wrote the manuscript. YFZ, YHX and YLP performed the genome analysis. YFZ and YL revised the manuscript. MLS and YL supervised the experiments.
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The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequence and the genome sequence of strain ASW11-36T are OR166349 and JAUCBP000000000, respectively.
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Luo, B., Su, JY., Zhang, YF. et al. Alteromonas arenosi sp. nov., a novel bioflocculant-producing bacterium, isolated from intertidal sand. Antonie van Leeuwenhoek 117, 28 (2024). https://doi.org/10.1007/s10482-023-01926-w
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DOI: https://doi.org/10.1007/s10482-023-01926-w