Lipase‐Mediated Deacetylation and Oligomerization of Lactonic Sophorolipids
Abstract The direct enzymatic polymerization of lactonic sophorolipids (SLs) was investigated with four lipases, including porcine pancreatic lipase (PPL), immobilized Mucor miehei lipase (MML), lyophilized Candida antarctica lipase (Fraction B, CAL‐B), and lyophilized Pseudomonas sp. lipase (PSL)....
Published in: | Biotechnology Progress |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2003
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1021/bp0201197 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1021%2Fbp0201197 https://onlinelibrary.wiley.com/doi/full/10.1021/bp0201197 |
Summary: | Abstract The direct enzymatic polymerization of lactonic sophorolipids (SLs) was investigated with four lipases, including porcine pancreatic lipase (PPL), immobilized Mucor miehei lipase (MML), lyophilized Candida antarctica lipase (Fraction B, CAL‐B), and lyophilized Pseudomonas sp. lipase (PSL). Several organic solvents, covering a wide range of polarity, were compared for suitability as the reaction medium. Isopropyl ether and toluene were found most effective. According to the quantification and structure identification by HPLC and LC‐MS, the reaction proceeded with the formation of monoacetylated lactonic SLs and the subsequent conversion of the intermediates to oligomers and polymers, presumably through ring‐opening polymerization. Temperature was found to have significant effects on the reaction. Both the conversion of reactant SLs and the subsequent formation of oligomers and polymers from the intermediates were faster at 60 °C than at 50 °C. The substrate selectivity among the three dominant reactant SLs also differed with the temperature. The conversion rate increased with the ring size of the lactones at 60 °C, but it decreased with the size at 50 °C. |
---|