Rhodococcus electrodiphilus sp. nov., a marine electro active actinobacterium isolated from coral reef

Ramaprasad, E. V. V.; Mahidhara, Ganesh; Sasikala, Ch.; Ramana, Ch. V.

doi:10.1099/ijsem.0.002895

Cited by 27 publications

(24 citation statements)

References 28 publications

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“…They have been isolated from extreme and unique environments, such as cold polar deserts, Antarctic and alpine soils, annually freezing and thawing tundra soil, salt marshes, and dry desert sand, in addition to mangrove sediments, snow, air, core, and a variety of anthropogenic habitats [ 12 , 25 , 28 , 30 , 32 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ]. They inhabit different water bodies, such as lakes and ponds, groundwater, and mineral and stratal waters, and are found in the bottom sediments of northern seas contaminated with petroleum products, and in oil fields [ 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ].…”

Section: Ubiquity Of Rhodococcus and Existence Of Pathogenic Speciesmentioning

confidence: 99%

Responses to Ecopollutants and Pathogenization Risks of Saprotrophic Rhodococcus Species

et al. 2021

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Under conditions of increasing environmental pollution, true saprophytes are capable of changing their survival strategies and demonstrating certain pathogenicity factors. Actinobacteria of the genus Rhodococcus, typical soil and aquatic biotope inhabitants, are characterized by high ecological plasticity and a wide range of oxidized organic substrates, including hydrocarbons and their derivatives. Their cell adaptations, such as the ability of adhering and colonizing surfaces, a complex life cycle, formation of resting cells and capsule-like structures, diauxotrophy, and a rigid cell wall, developed against the negative effects of anthropogenic pollutants are discussed and the risks of possible pathogenization of free-living saprotrophic Rhodococcus species are proposed. Due to universal adaptation features, Rhodococcus species are among the candidates, if further anthropogenic pressure increases, to move into the group of potentially pathogenic organisms with “unprofessional” parasitism, and to join an expanding list of infectious agents as facultative or occasional parasites.

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Section: Ubiquity Of Rhodococcus and Existence Of Pathogenic Speciesmentioning

confidence: 99%

Responses to Ecopollutants and Pathogenization Risks of Saprotrophic Rhodococcus Species

et al. 2021

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“…S5). The DPG, PE, PI and PIM contents were generally similar to that of other Rhodococcus species [4,6,8,9]. *Summed features are fatty acids that cannot be resolved reliably from another fatty acid using the chromatographic conditions chosen.…”

Section: Physiology and Chemotaxonomymentioning

confidence: 76%

“…S4). Strain S2-17 T shared several common features with other Rhodococcus strains, such as a chemotype IV cell wall, mycolic acids, MK-8 (H 2 ) as the major respiratory quinone, and a glycolyl muramic acid in the peptidoglycan [2, 3, 5, 8, 10]. DPG and PE were the major polar lipids in strain S2-17 T , and minor polar lipids comprised unidentified aminophospholipids (APLs), PI, PIM and three unidentified polar lipids (L) (Fig.…”

Section: Physiology and Chemotaxonomymentioning

confidence: 99%

Rhodococcus oxybenzonivorans sp. nov., a benzophenone-3-degrading bacterium, isolated from stream sediment

Baek

Jeong

et al. 2022

International Journal of Systematic and Evolutionary Microbiology

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A Gram-stain-positive, facultative aerobic, oxidase-negative, catalase-positive, non-sporulating, and non-motile bacterium, which degraded benzophenone-3, was isolated from stream sediment collected in the Republic of Korea and designated as strain S2-17T. Cells of this strain were rod-shaped during the early growth phase but became coccoid after the late exponential growth phase. Bacterial growth was observed at 15–37 °C (optimum, 25–30 °C) and pH 6.0–9.5 (optimum, pH 7.5–8.5) and in the presence of 0–9.0 % (w/v) NaCl (optimum, 0–1.0 %). Menaquinone-8 (H2) was the sole isoprenoid quinone, and C16 : 0, C17 : 1 ω8c, summed feature 3 (comprising C16 : 1 ω7c/C16 : 1 ω6c) and C18 : 1 ω9c were the major fatty acids. The cell wall of strain S2-17T contained meso-diaminopimelic acid, and arabinose, galactose and mycolic acid were found in whole-cell hydrolysates, suggesting a chemotype IV cell wall. The G+C content of the genome was 65.6 mol%. Phylogenetic analyses revealed that strain S2-17T formed a phyletic lineage within the genus Rhodococcus and was most closely related to Rhodococcus jostii DSM 44719T (99.2 % 16S rRNA gene sequence similarity). Average nucleotide identity and digital DNA–DNA hybridization values between strain S2-17T and R. jostii DSM 44719T were 82.6 and 26.5 %, respectively, indicating differences between the species. Based on its phenotypic, chemotaxonomic and molecular features, strain S2-17T represents a novel species of the genus Rhodococcus , for which the name Rhodococcus oxybenzonivorans sp. nov. is proposed. The type strain is S2-17T (=KACC 19281T=JCM 32046T).

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“…The total polar lipids profile was detected by spraying with 6% ethanolic molybdophosphoric acid. The respiratory isoprenoid quinone was extracted with a chloroform-methanol mixture (2:1, v/v), evaporated under vacuum, re-extracted with acetone, and analyzed using highperformance lipid chromatography as per established methods (Ramaprasad et al, 2018).…”

Section: Chemotaxonomic Analysismentioning

confidence: 99%

Methylobacterium ajmalii sp. nov., Isolated From the International Space Station

et al. 2021

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Four strains belonging to the family of Methylobacteriaceae were isolated from different locations on the International Space Station (ISS) across two consecutive flights. Of these, three were identified as Gram-negative, rod-shaped, catalase-positive, oxidase-positive, motile bacteria, designated as IF7SW-B2T, IIF1SW-B5, and IIF4SW-B5, whereas the fourth was identified as Methylorubrum rhodesianum. The sequence similarity of these three ISS strains, designated as IF7SW-B2T, IIF1SW-B5, and IIF4SW-B5, was <99.4% for 16S rRNA genes and <97.3% for gyrB gene, with the closest being Methylobacterium indicum SE2.11T. Furthermore, the multi-locus sequence analysis placed these three ISS strains in the same clade of M. indicum. The average nucleotide identity (ANI) values of these three ISS strains were <93% and digital DNA-DNA hybridization (dDDH) values were <46.4% with any described Methylobacterium species. Based on the ANI and dDDH analyses, these three ISS strains were considered as novel species belonging to the genus Methylobacterium. The three ISS strains showed 100% ANI similarity and dDDH values with each other, indicating that these three ISS strains, isolated during various flights and from different locations, belong to the same species. These three ISS strains were found to grow optimally at temperatures from 25 to 30°C, pH 6.0 to 8.0, and NaCl 0 to 1%. Phenotypically, these three ISS strains resemble M. aquaticum and M. terrae since they assimilate similar sugars as sole carbon substrate when compared to other Methylobacterium species. Fatty acid analysis showed that the major fatty acid produced by the ISS strains are C18:1−ω7c and C18:1−ω6c. The predominant quinone was ubiquinone 10, and the major polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, and an unidentified lipid. Therefore, based on genomic, phylogenetic, biochemical, and fatty acid analyses, strains IF7SW-B2T, IIF1SW-B5, and IIF4SW-B5, are assigned to a novel species within the genus Methylobacterium, and the name Methylobacterium ajmalii sp. nov. is proposed. The type strain is IF7SW-B2T (NRRL B-65601T and LMG 32165T).

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Rhodococcus electrodiphilus sp. nov., a marine electro active actinobacterium isolated from coral reef

Cited by 27 publications

References 28 publications

Responses to Ecopollutants and Pathogenization Risks of Saprotrophic Rhodococcus Species

Responses to Ecopollutants and Pathogenization Risks of Saprotrophic Rhodococcus Species

Rhodococcus oxybenzonivorans sp. nov., a benzophenone-3-degrading bacterium, isolated from stream sediment

Methylobacterium ajmalii sp. nov., Isolated From the International Space Station

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