Constrictibacter antarcticus gen. nov., sp. nov., a cryptoendolithic micro-organism from Antarctic white rock

Yamada, Kozo; Fukuda, Wakao; Kondo, Yuka; Miyoshi, Yuki; Atomi, Haruyuki; Imanaka, Tadayuki

doi:10.1099/ijs.0.026625-0

Cited by 30 publications

(21 citation statements)

References 38 publications

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“…Majority of the species produced Alkaline phosphatase and â-galactosidase but none of them secreted amylase while only 3 and 5 species exhibited the activity for protease and lipase, indicating that this group is responsible for the availability of phosphate in Antarctic habitats. The presence of pigment is a common phenomenon in all except in case of Constrictibacter antarcticus (Yamada et al, 2011). All the species contained their respective generic characteristics and the major fatty acid was C 18:1 ω7c and the respiratory quinine was Q10.…”

Section: Diversity Of Antarctica As Studied By Cultivable Methodsmentioning

confidence: 99%

Bacterial Biodiversity, Cold Adaption and Biotechnological Importance of Bacteria Occurring in Antarctica

Shivaji

2017

Proceedings of the Indian National Science Academy

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Antarctica is the coldest, iciest, windiest and driest continent and defines the limits of temperature at which life forms can survive and divide. These cold loving microorganisms are known as psychrophiles and are present in all the unique habitats of Antarctica including permafrost and ice. Their distribution and abundance varies from habitat to habitat and several new genera and species have been discovered in the icy continent. They have several strategies by which they survive and divide at low temperature such as the ability to catalyze reactions and continue metabolism with cold-tolerant enzymes; ability to maintain optimum membrane fluidity at low temperature; occurrence of specific genes required for survival at low temperatures; presence of antifreeze-activity etc.. Enzymes from psychrophilic bacteria have been found to be useful for several purposes ranging from recombinant DNA technology to food processing. The ability of cold-tolerant organisms to degrade petroleum products and other environmental pollutants highlight them as potential candidates for bioremediation in extreme cold environments. The recently reported genome sequences of a number of novel cold-tolerant isolates are likely to provide some more insights into the mechanism of bacterial cryotolerance.

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Section: Diversity Of Antarctica As Studied By Cultivable Methodsmentioning

confidence: 99%

Bacterial Biodiversity, Cold Adaption and Biotechnological Importance of Bacteria Occurring in Antarctica

Shivaji

2017

Proceedings of the Indian National Science Academy

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“…Quinones were extracted from freeze-dried cells (200 mg) with methyl chloride/ methanol (2 : 1, v/v) and analysed by reversed-phase HPLC (Minnikin et al, 1984;Yamada et al, 2011). Polar lipids were extracted following the methods of Bligh & Dyer (1959) and analysed by two-dimensional TLC.…”

mentioning

confidence: 99%

Chryseomicrobium aureum sp. nov., a bacterium isolated from activated sludge

Deng

Chu

et al. 2014

International Journal of Systematic and Evolutionary Microbiology

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A Gram-stain-positive, rod-shaped, non-motile, non-spore-forming, aerobic bacterial strain, designated BUT-2 T , was isolated from activated sludge of one herbicide-manufacturing wastewater-treatment facility in Kunshan, Jiangsu province, China, and subjected to polyphasic taxonomic studies. Analysis of the 16S rRNA gene sequence indicated that strain BUT-2 T shared the highest similarity with Chryseomicrobium amylolyticum (98.98 %), followed by Chryseomicrobium imtechense (98.88 %), with less than 96 % similarlity to members of the genera Paenisporosarcina, Planococcus, Sporosarcina and Planomicrobium. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain BUT-2 T clustered with C. amylolyticum JC16 T and C. imtechense MW10 T , occupying a distinct phylogenetic position. The major fatty acid (.10 % of total fatty acids) type of strain BUT-2 T was iso-C 15 : 0. The quinone system comprised menaquinone MK-7 (77.8 %), MK-6 (11.9 %) and MK-8 (10.3 %). The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and some unidentified phospholipids. The cell-wall peptidoglycan type of strain BUT-2 T was L-Orn-D-Glu. The genomic DNA G+C content of strain BUT-2 T was 48.5 mol%. Furthermore, the DNA-DNA relatedness in hybridization experiments against the reference strain was lower than 70 %, confirming that strain BUT-2 T did not belong to previously described species of the genus Chryseomicrobium. On the basis of its morphological, physiological and chemotaxonomic characteristics as well as phylogenetic analysis, strain BUT-2 T is considered to represent a novel species of the genus Chryseomicrobium, for which the name Chryseomicrobium aureum sp. nov. is proposed. The type strain is BUT-2 T (5CCTCC AB2013082 T 5KACC 17219 T ).

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“…108 OTUs were found across all 10 host species and could thus be considered 'core' microbiota of Caribbean Ircinia. One OTU that blasted to the vertically transmitted symbiont 16S sequences was found across all 10 species, Otu00012, belonging to Constrictibacter (Proteobacteria, Alphaproteobacteria, Puniceispirillales, Puniceispirillales incertae sedis) [45]. Of the eight putatively vertically transmitted symbionts, Otu00012 had the highest average relative abundance across all host species ( Figure 2).…”

Section: Microbial Communitiesmentioning

confidence: 99%

The relationship between microbiomes and selective regimes in the sponge genusIrcinia

Kelly

Carlson

Low

et al. 2020

Preprint

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Sponges are often densely populated by microbes that benefit their hosts through nutrition and bioactive secondary metabolites; however, sponges must simultaneously contend with the toxicity of microbes and thwart microbial overgrowth. Despite these fundamental tenets of sponge biology, the patterns of selection in the host sponges’ genomes that underlie tolerance and control of their microbiomes are still poorly understood. To elucidate these patterns of selection, we performed a population genetic analysis on multiple species of Ircinia from Belize, Florida, and Panama using an FST-outlier approach on transcriptome-annotated RADseq loci. As part of the analysis, we delimited species boundaries among seven growth forms of Ircinia. Our analyses identified balancing selection in immunity genes that have implications for the hosts’ tolerance of high densities of microbes. Additionally, our results support the hypothesis that each of the seven growth forms constitutes a distinct Ircinia species that is characterized by a unique microbiome. These results illuminate the evolutionary pathways that promote stable associations between host sponges and their microbiomes, and that potentially facilitate ecological divergence among Ircinia species.

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Constrictibacter antarcticus gen. nov., sp. nov., a cryptoendolithic micro-organism from Antarctic white rock

Cited by 30 publications

References 38 publications

Bacterial Biodiversity, Cold Adaption and Biotechnological Importance of Bacteria Occurring in Antarctica

Bacterial Biodiversity, Cold Adaption and Biotechnological Importance of Bacteria Occurring in Antarctica

Chryseomicrobium aureum sp. nov., a bacterium isolated from activated sludge

The relationship between microbiomes and selective regimes in the sponge genusIrcinia

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