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Alteromonas
The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Elena P Ivanova – 1st expert on this subject based on the ideXlab platform
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A new family of Alteromonadaceae fam. nov., including the marine proteobacteria species Alteromonas, PseudoAlteromonas, Idiomarina i Colwellia
Microbiology, 2020Co-Authors: Elena P Ivanova, Mikhaĭlov VvAbstract:: The taxonomic position of the marine genera Alteromonas, PseudoAlteromonas, Idiomarina, and Colwellia within the gamma subclass of the class Proteobacteria were specified on the basis of their phenotypic, genotypic, and phylogenetic characteristics. Gram-negative aerobic bacteria of the genera Alteromonas, PseudoAlteromonas, and Idiomarina and facultatively anaerobic bacteria of the genus Colwellia were found to form a phylogenetic cluster with a 16S rRNA sequence homology of 90% or higher. The characteristics of these genera presented in this paper allow their reliable taxonomic identification. Based on the analysis of our experimental data and analyses available in the literature, we propose to combine the genera Alteromonas, PseudoAlteromonas, Idiomarina, and Colwellia into a new family, Alteromonadaceae fam. nov., with the type genus Alteromonas.
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ecophysiological diversity of a novel member of the genus Alteromonas and description of Alteromonas mediterranea sp nov
Antonie Van Leeuwenhoek International Journal of General and Molecular Microbiology, 2015Co-Authors: Elena P Ivanova, Hayden K. Webb, Russell J. Crawford, Mario Lopezperez, Mila Zabalos, Song Ha Nguyen, Jason Ryan, Kiril Lagutin, Mikhail Vyssotski, Francisco RodriguezvaleraAbstract:Nine non-pigmented, motile, Gram-negative bacteria originally designated as Alteromonas macleodii deep-sea ecotypes, were isolated from seawater samples collected from four separate locations; two deep-sea sites in the Mediterranean Sea and surface water of the Aegean Sea and English Channel. The six strains studied in vitro were found to tolerate up to 20 % NaCl. The DNA–DNA relatedness between the deep-sea ecotype strains was found to be between 75 and 89 %, whilst relatedness with the validly named Alteromonas species was found to be between 31 and 69 %. The average nucleotide identity (ANI) amongst the deep-sea ecotype strains was found to be 98–100 %; the in silico genome-to-genome distance (GGD), 85–100 %; the average amino acid identity (AAI) of all conserved protein-coding genes, 95–100 %; and the strains possessed 30–32 of the Karlin’s genomic signature dissimilarity. The ANI between the deep-sea ecotype strains and A. macleodii ATCC 27126T and Alteromonas australica H 17T was found to be 80.6 and 74.6 %, respectively. A significant correlation was observed between the phenotypic data obtained in vitro and data retrieved in silico from whole genome sequences. The results of a phylogenetic study that incorporated a 16S rRNA gene sequence analysis, multilocus phylogenetic analysis (MLPA) and genomic analysis, together with the physiological, biochemical and chemotaxonomic data, clearly indicated that the group of deep-sea ecotype strains represents a distinct species within the genus Alteromonas. Based on these data, a new species, Alteromonas mediterranea, is proposed. The type strain is DET ( = CIP 110805T = LMG 28347T = DSM 17117T).
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genomes of Alteromonas australica a world apart
BMC Genomics, 2014Co-Authors: Mario Lopezperez, Elena P Ivanova, Aitor Gonzaga, Francisco RodriguezvaleraAbstract:Alteromonas is a genus of marine bacteria that is very easy to isolate and grow in the laboratory. There are genomes available of the species Alteromonas macleodii from different locations around the world and an Alteromonas sp. isolated from a sediment in Korea. We have analyzed the genomes of two strains classified by 16S rRNA (>99% similarity) as the recently described species Alteromonas australica, and isolated from opposite ends of the world; A. australica DE170 was isolated in the South Adriatic (Mediterranean) at 1000 m depth while A. australica H17T was isolated from a sea water sample collected in St Kilda Beach, Tasman Sea. Although these two strains belong to a clearly different species from A. macleodii, the overall synteny is well preserved and the flexible genomic islands seem to code for equivalent functions and be located at similar positions. Actually the genomes of all the Alteromonas species known to date seem to preserve synteny quite well with the only exception of the sediment isolate SN2. Among the specific metabolic features found for the A. australica isolates there is the degradation of xylan and production of cellulose as extracellular polymeric substance by DE170 or the potential ethanol/methanol degradation by H17T. The genomes of the two A. australica isolates are not more different than those of strains of A. macleodii isolated from the same sample. Actually the recruitment from metagenomes indicates that all the available genomes are found in most tropical-temperate marine samples analyzed and that they live in consortia of several species and multiple clones within each. Overall the hydrolytic activities of the Alteromonas genus as a whole are impressive and fit with its known capabilities to exploit sudden inputs of organic matter in their environment.
Junghoon Yoon – 2nd expert on this subject based on the ideXlab platform
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Alteromonas litorea sp. nov., a slightly halophilic bacterium isolated from an intertidal sediment of the Yellow Sea in Korea.
International journal of systematic and evolutionary microbiology, 2020Co-Authors: Junghoon Yoon, Taekwang Oh, Yongha ParkAbstract:A Gram-negative, motile, non-spore-forming, rod-shaped bacterium, designated strain TF-22T, was isolated from an intertidal sediment in Korea. This organism grew optimally at 30-37 degrees C and in the presence of 2-5% (w/v) NaCl. It did not grow without NaCl or in the presence of more than 14% (w/v) NaCl. Strain TF-22T was characterized chemotaxonomically as having ubiquinone-8 as the predominant respiratory lipoquinone and C(16 : 0), C(16 : 1) omega7c and/or iso-C(15 : 0) 2-OH and C(18 : 1) omega7c as the major fatty acids. The DNA G+C content of strain TF-22T was 46.0 mol%. Phylogenetic analyses based on 16S rDNA sequences showed that strain TF-22T falls within the gamma-subclass of the Proteobacteria and forms a coherent cluster with Alteromonas macleodii and Alteromonas marina. Levels of 16S rDNA similarity between strain TF-22T and the type strains of two Alteromonas species were in the range 98.1-98.6%. The level of DNA-DNA relatedness between strain TF-22T and the type strains of two Alteromonas species was 15.7-18.5%. Therefore, on the basis of phenotypic properties, phylogeny and genomic distinctiveness, strain TF-22T should be placed in the genus Alteromonas as a novel species, for which the name Alteromonas litorea sp. nov. is proposed. The type strain is TF-22TT (=KCCM 41775T=JCM 12188T).
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Alteromonas marina sp. nov., isolated from sea water of the East Sea in Korea.
International journal of systematic and evolutionary microbiology, 2020Co-Authors: Junghoon Yoon, Taekwang Oh, Kook Hee Kang, Yongha ParkAbstract:Two Gram-negative, motile, non-spore-forming and moderately halophilic rods (strains SW-47(T) and SW-49) were isolated from sea water of the East Sea in Korea and subjected to a polyphasic taxonomic study. The two strains grew optimally between 30 and 37 degrees C, and grew at 4 and 44 degrees C but not at temperatures above 45 degrees C. They grew optimally in the presence of 2-5 % (w/v) NaCl, but did not grow in the absence of NaCl. Strains SW-47(T) and SW-49 had ubiquinone-8 (Q-8) as the predominant respiratory lipoquinone and C(16 : 1) omega7c and/or iso-C(15 : 0) 2OH, C(16 : 0) and C(18 : 1) omega7c as the major fatty acids, which are consistent with the corresponding data for Alteromonas macleodii. The DNA G+C contents of strains SW-47(T) and SW-49 were 45 and 44 mol%, respectively. Strains SW-47(T) and SW-49 showed a high level of 16S rDNA sequence similarity (99.9 %) and a mean level of DNA-DNA relatedness of 96.5 %. Phylogenetic analyses based on 16S rDNA sequences showed that the two strains form a coherent cluster with A. macleodii. Strains SW-47(T) and SW-49 exhibited levels of 16S rDNA sequence similarity of 99.3 and 99.1 %, respectively, with A. macleodii DSM 6062(T) and of less than 89.4 % with other species used in the phylogenetic analyses. Alteromonas fuliginea CIP 105339(T) was found to be more closely related to the genus PseudoAlteromonas than to the genus Alteromonas: On the basis of phenotypic properties and phylogenetic and genomic data, strains SW-47(T) and SW-49 represent a new species of the genus Alteromonas, for which the name Alteromonas marina (type strain SW-47(T)=KCCM 41638(T)=JCM 11804(T)) is proposed.
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Alteromonas aestuariivivens sp nov isolated from a tidal flat
International Journal of Systematic and Evolutionary Microbiology, 2017Co-Authors: Sooyeon Park, Su Jung Choi, Jimin Park, Junghoon YoonAbstract:A Gram-stain-negative, aerobic, non-spore-forming, motile and ovoid or rod-shaped bacterial strain, JDTF-113T, was isolated from a tidal flat in Jindo, an island of South Korea. Strain JDTF-113T grew optimally at 30 °C, at pH 7.0–8.0 and in the presence of 2.0 % (w/v) NaCl. A neighbour-joining phylogenetic tree, based on 16S rRNA gene sequences, revealed that strain JDTF-113T fell within the clade enclosing the type strains of species of the genus
Alteromonas
. Strain JDTF-113T exhibited 16S rRNA gene sequence similarity values of 97.1–98.1 % to the type strains of
Alteromonas
lipolytica
,
Alteromonas
litorea
,
Alteromonas
mediterranea
,
Alteromonas
confluentis
,
Alteromonas hispanica
,
Alteromonas
genovensis
and
Alteromonas
marina
, and of 94.8–96.9 % to those of the other species of the genus
Alteromonas
. Strain JDTF-113T contained Q-8 as the predominant ubiquinone and C16 : 0, summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) and C18 : 1ω7c as the major fatty acids. The major polar lipids of strain JDTF-113T were phosphatidylethanolamine, phosphatidylglycerol and one unidentified glycolipid. The DNA G+C content of strain JDTF-113T was 51.1 mol% and its mean DNA–DNA relatedness values with the type strains of seven closely phylogenetically related species of the genus
Alteromonas
were was 10–23 %. The differential phenotypic properties and phylogenetic and genetic distinctiveness support strain JDTF-113T being separated from species of the genus
Alteromonas
with validly published
names
. On the basis of the data presented, strain JDTF-113T is considered to represent a novel species of the genus
Alteromonas
, for which the name Alteromonas aestuariivivens sp. nov. is proposed. The type strain is JDTF-113T (=KCTC 52655T=NBRC 112708T).
Yongha Park – 3rd expert on this subject based on the ideXlab platform
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Alteromonas litorea sp. nov., a slightly halophilic bacterium isolated from an intertidal sediment of the Yellow Sea in Korea.
International journal of systematic and evolutionary microbiology, 2020Co-Authors: Junghoon Yoon, Taekwang Oh, Yongha ParkAbstract:A Gram-negative, motile, non-spore-forming, rod-shaped bacterium, designated strain TF-22T, was isolated from an intertidal sediment in Korea. This organism grew optimally at 30-37 degrees C and in the presence of 2-5% (w/v) NaCl. It did not grow without NaCl or in the presence of more than 14% (w/v) NaCl. Strain TF-22T was characterized chemotaxonomically as having ubiquinone-8 as the predominant respiratory lipoquinone and C(16 : 0), C(16 : 1) omega7c and/or iso-C(15 : 0) 2-OH and C(18 : 1) omega7c as the major fatty acids. The DNA G+C content of strain TF-22T was 46.0 mol%. Phylogenetic analyses based on 16S rDNA sequences showed that strain TF-22T falls within the gamma-subclass of the Proteobacteria and forms a coherent cluster with Alteromonas macleodii and Alteromonas marina. Levels of 16S rDNA similarity between strain TF-22T and the type strains of two Alteromonas species were in the range 98.1-98.6%. The level of DNA-DNA relatedness between strain TF-22T and the type strains of two Alteromonas species was 15.7-18.5%. Therefore, on the basis of phenotypic properties, phylogeny and genomic distinctiveness, strain TF-22T should be placed in the genus Alteromonas as a novel species, for which the name Alteromonas litorea sp. nov. is proposed. The type strain is TF-22TT (=KCCM 41775T=JCM 12188T).
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Alteromonas marina sp. nov., isolated from sea water of the East Sea in Korea.
International journal of systematic and evolutionary microbiology, 2020Co-Authors: Junghoon Yoon, Taekwang Oh, Kook Hee Kang, Yongha ParkAbstract:Two Gram-negative, motile, non-spore-forming and moderately halophilic rods (strains SW-47(T) and SW-49) were isolated from sea water of the East Sea in Korea and subjected to a polyphasic taxonomic study. The two strains grew optimally between 30 and 37 degrees C, and grew at 4 and 44 degrees C but not at temperatures above 45 degrees C. They grew optimally in the presence of 2-5 % (w/v) NaCl, but did not grow in the absence of NaCl. Strains SW-47(T) and SW-49 had ubiquinone-8 (Q-8) as the predominant respiratory lipoquinone and C(16 : 1) omega7c and/or iso-C(15 : 0) 2OH, C(16 : 0) and C(18 : 1) omega7c as the major fatty acids, which are consistent with the corresponding data for Alteromonas macleodii. The DNA G+C contents of strains SW-47(T) and SW-49 were 45 and 44 mol%, respectively. Strains SW-47(T) and SW-49 showed a high level of 16S rDNA sequence similarity (99.9 %) and a mean level of DNA-DNA relatedness of 96.5 %. Phylogenetic analyses based on 16S rDNA sequences showed that the two strains form a coherent cluster with A. macleodii. Strains SW-47(T) and SW-49 exhibited levels of 16S rDNA sequence similarity of 99.3 and 99.1 %, respectively, with A. macleodii DSM 6062(T) and of less than 89.4 % with other species used in the phylogenetic analyses. Alteromonas fuliginea CIP 105339(T) was found to be more closely related to the genus PseudoAlteromonas than to the genus Alteromonas: On the basis of phenotypic properties and phylogenetic and genomic data, strains SW-47(T) and SW-49 represent a new species of the genus Alteromonas, for which the name Alteromonas marina (type strain SW-47(T)=KCCM 41638(T)=JCM 11804(T)) is proposed.
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Alteromonas litorea sp nov a slightly halophilic bacterium isolated from an intertidal sediment of the yellow sea in korea
International Journal of Systematic and Evolutionary Microbiology, 2004Co-Authors: Junghoon Yoon, Taekwang Oh, Yongha ParkAbstract:A Gram-negative, motile, non-spore-forming, rod-shaped bacterium, designated strain TF-22T, was isolated from an intertidal sediment in Korea. This organism grew optimally at 30–37 °C and in the presence of 2–5 % (w/v) NaCl. It did not grow without NaCl or in the presence of more than 14 % (w/v) NaCl. Strain TF-22T was characterized chemotaxonomically as having ubiquinone-8 as the predominant respiratory lipoquinone and C16 : 0, C16 : 1
ω7c and/or iso-C15 : 0 2-OH and C18 : 1
ω7c as the major fatty acids. The DNA G+C content of strain TF-22T was 46·0 mol%. Phylogenetic analyses based on 16S rDNA sequences showed that strain TF-22T falls within the γ-subclass of the Proteobacteria and forms a coherent cluster with Alteromonas macleodii and Alteromonas marina. Levels of 16S rDNA similarity between strain TF-22T and the type strains of two Alteromonas species were in the range 98·1–98·6 %. The level of DNA–DNA relatedness between strain TF-22T and the type strains of two Alteromonas species was 15·7–18·5 %. Therefore, on the basis of phenotypic properties, phylogeny and genomic distinctiveness, strain TF-22T should be placed in the genus Alteromonas as a novel species, for which the name Alteromonas litorea sp. nov. is proposed. The type strain is TF-22T (=KCCM 41775T=JCM 12188T).