Open AccessLipases from psychrotropic antarctic bacteria
Author(s) -
Feller Georges,
Thiry Michel,
Arpigny JeanLouis,
Mergeay Max,
Gerday Charles
Publication year - 1990
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1990.tb04004.x
Subject(s) - lipase , bacteria , enzyme , strain (injury) , psychrophile , chemistry , heat stability , biochemistry , food science , microbiology and biotechnology , biology , genetics , materials science , anatomy , composite material
Properties of lipases excreted by 4 psychrotropic Moraxella strains from antarctic sea water have investigated. Despite an optimal cell generation time at 25°C, maximal lipase excretion essentially occurs at low temperatures. These enzymes are characterized by a shift of the apparent optimal activity towards low temperatures, by a reduction of the activation energy value and by a decrease in heat stability. These lipases are associated with lipopolysaccharides, forming high molecular weight complexes. One of the selected strain is able to express the antibiotic resistances carried by RP4, at both 4 and 25°C.