Proteolytic and amylolytic enzymes from a newly isolated Bacillus mojavensis SA: Characterization and applications as laundry detergent additive and in leather processing

被引:58
作者
Hammami, Amal [1 ]
Fakhfakh, Nahed [1 ]
Abdelhedi, Ola [1 ]
Nasri, Moncef [1 ]
Bayoudh, Ahmed [1 ]
机构
[1] Univ Sfax, Engn Natl Sch Sfax ENIS, Lab Enzyme Engn & Microbiol, Sfax, Tunisia
关键词
Bacillus mojavensis; Alkaline proteases; alpha-Amylases; Detergent stable; Dehairing function; THERMOSTABLE ALKALINE PROTEASE; ALPHA-AMYLASE; SHRIMP WASTES; PURIFICATION; STRAIN; OPTIMIZATION; EXTRACTION; CLEAVAGE; SEAWATER; TOLERANT;
D O I
10.1016/j.ijbiomac.2017.11.148
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The present work aims to study the simultaneous production of highly alkaline proteases and thermostable alpha-amylases by a newly isolated bacterium Bacillus mojavensis SA. The optimum pH and temperature of amylase activity were 9.0 and 55 degrees C, respectively, while those of the proteolytic activity were 12.0 and 60 degrees C, respectively. Both alpha-amylase and protease enzymes showed a high stability towards a wide range of pH and temperature. Furthermore, SA crude enzymes were relatively stable towards non-ionic (Tween 20, Tween 80 and Triton X-100) and anionic (SDS) surfactants, as well as oxidizing agents. Both activities were improved by the presence of polyethylene glycol 4000 and glycerol. Additionally, the crude enzymes showed excellent stability against various solid and liquid detergents. Wash performance analysis revealed that the SA crude enzymes exhibited a remarkable efficiency in the removal of a variety type of stains, such as blood, chocolate, coffee and oil. On the other side, SA proteases revealed a potential dehairing activity of animal hide without chemical assistance or fibrous proteins hydrolysis. Thus, considering their promising properties, B. mojavensis SA crude enzymes could be used in several biotechnological bioprocesses. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:56 / 68
页数:13
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