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Resistance to Hypoosmotic Shock of Liposomes Containing Novel Pigments from an Antarctic Bacterium
Correa-Llanten, Daniela N.,Amenabar, Maximiliano J.,Blamey, Jenny M. The Korean Society for Microbiology and Biotechnol 2012 한국미생물·생명공학회지 Vol.40 No.3
Although the antioxidant capacity of carotenoids and their role in regulating membrane fluidity have been well studied, their ability to confer resistance to hypoosmotic shock is poorly understood. In this work, we analyzed the effect of a mixture of carotenoid pigments obtained from an Antarctic microorganism belonging to the genus Pedobacter on liposomal resistance to hypoosmotic conditions. Intercalation of pigments into liposomal structures resulted in an improvement of membrane resistance by decreasing the percentage of calcein released in comparison to that by liposomes without pigments. Due to these properties, such pigments could be useful for biotechnological applications.
Resistance to Hypoosmotic Shock of Liposomes Containing Novel Pigments from an Antarctic Bacterium
( Correa Llanten ),( Daniela N. ),( Maximiliano J. Amenabar ),( Jenny M. Blamey ) 한국미생물생명공학회(구 한국산업미생물학회) 2012 한국미생물·생명공학회지 Vol.40 No.3
Although the antioxidant capacity of carotenoids and their role in regulating membrane fluidity have been well studied, their ability to confer resistance to hypoosmotic shock is poorly understood. In this work, we analyzed the effect of a mixture of carotenoid pigments obtained from an Antarctic microorganism belonging to the genus Pedobacter on liposomal resistance to hypoosmotic conditions. Intercalation of pigments intoliposomal structures resulted in an improvement of membrane resistance by decreasing the percentage of calcein released in comparison to that by liposomes without pigments. Due to these properties, such pigments could be useful for biotechnological applications.
( Correa Llanten Daniela ),( Juanita Larrain Linton ),( Patricio A Munoz ),( Miguel Castro ),( Freddy Boehmwald ),( Jenny M Blamey ) 한국미생물생명공학회(구 한국산업미생물학회) 2013 한국미생물·생명공학회지 Vol.41 No.3
A gram-positive, rod-shaped, spore-forming, motile thermophilic bacterium was isolated from a sterilization oven. The microorganism GWE1, formally named Geobacillus wiegelii identified as a member of the genus Geobacillus. GWE1 grew under aerobic conditions of between 60-80ºC (optimum 70ºC), in a pH range of 3.0-8.0 (optimum pH70ºC 5.8), and between 0 and 2 M NaCl (optimum 0.3 M). The membrane polar lipids were dominated by branched saturated fatty acids, which included as the major constituents; iso-15:0 (13.3%), 16:1(ω7) (12.8%), 16:0 (28.5%), iso-17:0 (13.5%) and anteiso-17:0 (12.3%). The DNA G+C content was 47.2 mol% (determined by HPLC). The 16S rRNA gene sequence of GWE1 showed a high similarity with Geobacillus caldoxylosilyticus (97%). However, the level of DNA?DNA relatedness was only 58%. These data suggest that GWE1 is probably a novel specie of the genus Geobacillus.
Resistance to Hypoosmotic Shock of Liposomes Containing Novel Pigments from an Antarctic Bacterium
Daniela N. Correa-Llanten,Maximiliano J. Amenabar,Jenny M. Blamey 한국미생물·생명공학회 2012 한국미생물·생명공학회지 Vol.40 No.3
Although the antioxidant capacity of carotenoids and their role in regulating membrane fluidity have been well studied, their ability to confer resistance to hypoosmotic shock is poorly understood. In this work, we analyzed the effect of a mixture of carotenoid pigments obtained from an Antarctic microorganism belonging to the genus Pedobacter on liposomal resistance to hypoosmotic conditions. Intercalation of pigments into liposomal structures resulted in an improvement of membrane resistance by decreasing the percentage of calcein released in comparison to that by liposomes without pigments. Due to these properties, such pigments could be useful for biotechnological applications.