Screening and Identification of a New Elastase-producing Strain

Abstract:

The study provide a theoretical basis for the industrial production of a elastase-high-yield strain which was isolated from the straw, and the selected strain was identified. The screening strategy included casein (skim milk) plate selecting and elastin (beef tendon) re-screening. And then, the morphological, physiological and biochemical characteristics as well as 16S rRNA sequence homology of the selected strain were studied. Finally, the strain LSF-97 which had a excellent decomposing ability to beef tendon was obtained. The results showed that the strain LSF-97 is relative to the Bacillus pumilus with 100 % similar in sequence under the phylogenetic tree, the morphological and physiological and biochemical characteristics are also consistent with pattern of bacteria. So it was identified as Bacillus pumilus.