Isolation and chracterization of the Serratia sp. FS14 secreting thermostable DNase and protease

Abstract:

A red pigment producing bacterium strain FS14 was isolated from the stem of the diseased Atractylodes macrocephala Koidz. The strain was classified into Serratia according to its morphology, the physiological and biochemical features and 16S rDNA sequence. Different from the other reported Serratia species, the F14S strain could secret the thermostable DNase and protease. These secreted thermostable enzymes were still active even after pretreated at 100 °C for 30 min, while less activity was found after pretreated at 60 °C?70 °C for 30 min. The reason for this phenomenon need to be further investigated.