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A novel amylolytic enzyme producing thermoalkaliphilic bacterium, the source of industrially used enzymes was isolated. Isolated strain was identified by morphological, physio-biochemical tests and the 16S rRNA gene sequence ana­lysis. The optimal conditions of enzyme activity were determined. For higher alpha -amylase production, the variables such as yeast extract, starch, CaCl 2 , (NH 4 ) 2 SO 4 , NaCl and MgSO 4 in the a -amylase production medium, the tem­perature and pH were screened by Plackett–Burman design and opti­mised using response surface methodology (RSM). The optimal conditions were found to be 0.15 g/L for starch, 0.15 mg/L for CaCl 2 and 60 °C for tempe­rature. By using RSM model, amylase production increase was achieved seven­fold. It is showed that this method can be utilised to optimize alpha -amylase pro­duction in athermophilic bacteria such as Bacillus paralicheniformis .

Optimization of the thermostable alkaline and Ca-dependent α−amylase production from Bacillus paralicheniformis by statistical modeling