info:eu-repo/semantics/article
Molecular recognition of an acyl–enzyme intermediate on the lipase B from Candida antarctica
Fecha
2017-11Registro en:
Toledo, Victoria; Llerena Suster, Carlos Rafael; Ferreira, María Luján; Collins, Sebastián Enrique; Briand, Laura Estefania; Molecular recognition of an acyl–enzyme intermediate on the lipase B from Candida antarctica; Royal Society of Chemistry; Catalysis Science & Technology; 7; 9; 11-2017; 1953-1964
2044-4761
CONICET Digital
CONICET
Autor
Toledo, Victoria
Llerena Suster, Carlos Rafael
Ferreira, María Luján
Collins, Sebastián Enrique
Briand, Laura Estefania
Resumen
This investigation provides evidence of the acyl enzyme species involved in the interaction of R/S-ketoprofen with the lipase B from Candida antarctica. The interaction between the profen and the enzyme was studied by in situ time-resolved ATR-FTIR under both static and transient conditions. Particularly, modulation excitation spectroscopy (MES) with phase sensitive detection (PSD) allowed us to univocally distinguish the signals belonging to the interaction between ketoprofen and the enzyme from the strong background signals. These experimental tools coupled with theoretical DFT analysis allowed us to propose various species derived from the interaction of ketoprofen with serine through H bonding (without reaction) and the acyl enzyme species (ester bond formation) which are the intermediates in the biocatalytic assisted esterification and hydrolysis using lipases.