Structural and compositional diversity of biosurfactants produced by a novel strain of Sporosarcina luteola ME44 from oil reservoir.

The urealytically active microorganism Sporosarcina luteola induces the precipitation of metals which has attracted attention in biomineralization, bioremediation, and industrial waste recycling. Herein, we report a novel biosurfactant producing strain of Sporosarcina luteola ME44 isolated from Chinese oilfield. The structure, composition, and surface activity of the biosurfactants produced by Sporosarcina luteola ME44 were investigated by using a combination of the high-performance liquid chromatography, time-of-flight mass spectrometry and surface tensiometer. The biosurfactant extracted by strain ME44 was identified as surfactin with five variants and the yield was 1,010 ± 60 mg⋅L -1 . This is the first report on the structural composition and surface activity of biosurfactants isolated from the Sporosarcina luteola. It extended our knowledge about the role of the species Sporosarcina luteola in the ecosystem of extreme natural environments such as oil reservoir. In addition, Sporosarcina luteola ME44 showed bioprecipitation properties for metal ions Cd (II), Cu (II), Zn (II), and Ag (I), which indicated the application potential of Sporosarcina luteola in the field of bioremediation. This article is protected by copyright. All rights reserved.