Abstract
Three novel lipase-producing microorganisms have been isolated from 526 actinomycete strains by employing screening techniques on solid media. Time-course and scale-up of enzyme production were analyzed. The lipases, produced by microorganisms belonging to the Streptomyces genus, were tested in several reactions in organic medium using unnatural substrates. The lyophilized crude lipases are stable at least for 1 month at 4°C (100% recovered activity). The lipase activity per milliliter of cell culture broth was higher than described in the literature for other lipases from actinomycetes. The three selected lipases displayed better activity than commercial lipase from Candida rugosa in the resolution of chiral secondary alcohols. The lipase from S. halstedii also displayed very good activity in the synthesis of carbamates.
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