title: Characterization of cross-linked immobilized lipase from thermophilic mould Thermomyces lanuginosa using glutaraldehyde.
abstract: Cross-linked enzyme aggregates (CLEAs) have emerged as an interesting biocatalyst design for immobilization. Using this approach, a 1,3 regiospecific, alkaline and thermostable lipase from Thermomyces lanuginosa was immobilized. Efficient cross-linking was observed when ammonium sulphate was used as precipitant along with a two fold increase in activity in presence of SDS. The TEM and SEM microphotographs of the CLEAs formed reveal that the enzyme aggregates are larger in size as compared to the free lipase due to the cross-linking of enzyme aggregates with glutaraldehyde. The stability and reusability of the CLEA with respect to olive oil hydrolysis was evaluated. The CLEA showed more than 90% residual activity even after 10 cycles of repeated use.
authors.affiliation: Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi 110 021, India.
authors.forename: Pritesh
authors.initials: P
authors.lastname: Gupta
authors.forename: Kakoli
authors.initials: K
authors.lastname: Dutt
authors.forename: Swati
authors.initials: S
authors.lastname: Misra
authors.forename: Shailendra
authors.initials: S
authors.lastname: Raghuwanshi
authors.forename: R K
authors.initials: RK
authors.lastname: Saxena
mesh_terms: D001203:Ascomycota / Q000201:enzymology*; D005976:Glutaral / Q000378:metabolism*; D008049:Lipase / Q000378:metabolism*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission
chemical_list: D008049:Lipase; D005976:Glutaral