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RevistaProcess Biochemistry
Volumen47 (12)

Tailor-made design of penicillin G acylase surface enables its site-directed immobilization and stabilization onto commercial mono-functional epoxy supports.

Grupos de investigación:Ingeniería Enzimática
Four different mutants of penicillin G acylase from E. coli (PGA) were site-direct immobilized and rigidification on Eupergit C. The resulting immobilized preparations were more stable against both temperature and organic solvents than those obtained by using a more complex tailor-made disulfide-epoxy supports. The region around the position β380 was the most interesting one to achieve the highest PGA stabilization values (this derivative was 150-fold more stable than the corresponding soluble enzyme). Such region was further enriched in 4 additional lysine residues, and the resulting immobilized derivative was 1500-fold more stable than the same protein variant uni-punctually immobilized through position β380. This stabilization factor was the highest reported for PGA by immobilization on Eupergit C as commercial epoxy-acrylic immobilization carrier. 
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