Portal de Periódicos da CAPES

Properties of a thermostable and solvent stable extracellular lipase from aPseudomonas sp. AG-8

2001; Wiley; Volume: 41; Issue: 6 Linguagem: Inglês

10.1002/1521-4028(200112)41

1521-4028

Anil K. Sharma, Ram Prakash Tiwari, Gurinder Singh Hoondal,

Electrochemical sensors and biosensors

An extracellular lipase isolated from Pseudomonas sp. AG-8, had an optimal activity at 45 °C and pH 8.0–8.5. It retained more than 80% of its initial activity after keeping for 1 h at 65 °C. The enzyme was stable in 5 M NaCl and 6 M urea. Triton X-100 increased the lipase activity by 2.4 fold. Ca2+ ions activated the enzyme, while Zn2+, Fe2+, Fe3+ strongly inhibited its activity. Ethanol, methanol and acetone at 20% (v/v) enhanced the lipase activity by 2.9, 3.6 and 4.5 fold respectively. Dimethylsulphoxide at 90% (v/v) enhanced the enzyme activity up to 5.7 fold.