Parageobacillus thermantarcticus, an Antarctic Cell Factory: From Crop Residue Valorization by Green Chemistry to Astrobiology Studies

Abstract

Knowledge of Antarctic habitat biodiversity, both marine and terrestrial, has increased considerably in recent years, causing considerable development in the studies of life science related to Antarctica. In the Austral summer 1986–1987, a new thermophilic bacterium, Parageobacillus thermantarcticus strain M1 was isolated from geothermal soil of the crater of Mount Melbourne (74°22′ S, 164°40′ E) during the Italian Antarctic Expedition. In addition to the biotechnological potential due to the production of exopolysaccharides and thermostable enzymes, successful studies have demonstrated its use in the green chemistry for the transformation and valorization of residual biomass and its employment as a suitable microbial model for astrobiology studies. The recent acquisition of its genome sequence opens up new opportunities for the use of this versatile bacterium in still unexplored biotechnology sectors.

Valorization of Rice Straw for Optimization of Production of Thermotolerant Cellulase by Parageobacillus Thermoglucosidasius NBCB1 Under Submerged Fermentation

“…In our study, a cellulase producing thermophilic bacterium, Parageobacillus thermoglucosidasius NBCB1 was isolated from a thermophilic bacterial consortium bred from vermicompost using RS as substrate. P.thermoglucosidasius has earlier been isolated from soil [32], marine environment [33], compost [34], wood wastes [35] and hot springs [36]. However, there are limited reports on the production of enzymes by the organism.…”

Extracellular polymeric substances in Antarctic environments: A review of their ecological roles and impact on glacier biogeochemical cycles

“…In events of oil slick, EPS acts as an emulsifier binding oil droplets (hydrocarbon) with other organic matter forming marine oil snow. (Carrión et al, 2015;Caruso et al, 2018aCaruso et al, , 2018bCaruso et al, , 2019Corsaro et al, 2004;Daglio et al, 2018;Finore et al, 2019;Manca et al, 1996; J o u r n a l P r e -p r o o f…”

Genomic Analysis Provides New Insights Into Biotechnological and Industrial Potential of Parageobacillus thermantarcticus M1

“…The taxonomical assignment of strain M1 underwent several changes over the years. Originally, at the time of the first taxonomic description, Nicolaus et al (1996) indicated it by the name of Bacillus thermoantarcticus , which was subsequently corrected to “ thermantarcticus ” in the Validation List N. 84 published in IJSEM ( Finore et al, 2019 ). Based on the 16S rRNA gene sequence analysis, strain M1 was placed as a peripheral member of the thermophilic Bacillus rRNA group 5.…”