کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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684662 | 889025 | 2008 | 7 صفحه PDF | دانلود رایگان |
A protease producing bacterial culture (‘S7’) was isolated from slaughterhouse waste samples, Hyderabad, India. It was related to Streptomyces sp. on the basis of biochemical properties and 16S rRNA gene sequencing. Purification of the protease present in the culture medium supernatant on sephacryl S-100 indicated that it contains a keratinase with 67% recovery, 2.5-fold purification and an estimated molecular mass of ∼44,000 Da. Keratinase showed an optimal activity at 45 °C and pH 11. Keratinase activity increased substantially in presence of Ca2+ and was inhibited in presence of PMSF and EDTA identifying it as a serine metalloprotease. Stability in the presence of detergents, surfactants and solvents make this keratinase extremely useful for biotechnological process involving keratin hydrolysis or in the leather industry.
Journal: Bioresource Technology - Volume 99, Issue 6, April 2008, Pages 1596–1602