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논문 기본 정보

자료유형
학술저널
저자정보
Mahakhan Polson (Department of Microbiology Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand) Patapee Aphaiso (Department of Microbiology Faculty of Science Khon Kaen University Khon Kaen 40002 ThailandGraduate School Khon Kaen University Khon Kaen 40002 Thailand) Srisunthorn Kannika (Department of Microbiology Faculty of Science Khon Kaen University Khon Kaen 40002 Thailand) Vichitphan Kanit (Department of Biotechnology Faculty of Technology Khon Kaen University Khon Kaen 40002 ThailandFermentation Research Center for Value-Added Agricultural Products (FerVAAP) Khon Kaen University Khon Ka) Vichitphan Sukanda (Department of Biotechnology Faculty of Technology Khon Kaen University Khon Kaen 40002 ThailandFermentation Research Center for Value-Added Agricultural Products (FerVAAP) Khon Kaen University Khon Ka) Punyauppa-path Sukrita (Department of Mathematics and Science Faculty of Agriculture and Technology Rajamangala University of Technology Isan Surin Campus Surin 32000 Thailand) Sawaengkaew Jutaporn (Department of Microbiology Faculty of Science Khon Kaen University Khon Kaen 40002 ThailandFermentation Research Center for Value-Added Agricultural Products (FerVAAP) Khon Kaen University Khon Kaen 4)
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제33권 제2호
발행연도
2023.2
수록면
195 - 202 (8page)
DOI
10.4014/jmb.2210.10007

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Protease is a widely used enzyme particularly in the detergent industry. In this research, we aimed to isolate alkaline protease-producing bacteria for characterization as a laundry detergent additive. The screening of alkaline protease production was investigated on basal medium agar plus 1% skim milk at pH 11, with incubation at 30°C. The highest alkaline protease-producing bacterium was 6BS15-4 strain, identified as Bacillus gibsonii by 16S rRNA gene sequencing. While the optimum pH was 12.0, the strain was stable at pH range 7.0-12.0 when incubated at 45°C for 60 min. The alkaline protease produced by B. gibsonii 6BS15-4 using dairy effluent was characterized. The optimum temperature was 60°C and the enzyme was stable at 55°C when incubated at pH 11.0 for 60 min. Metal ions K+ , Mg2+, Cu2+, Na+ , and Zn2+ exhibited a slightly stimulatory effect on enzyme activity. The enzyme retained over 80% of its activity in the presence of Ca2+, Ba2+, and Mn2+. Thiol reagent and ethylenediaminetetraacetic acid did not inhibit the enzyme activity, whereas phenylmethylsulfonyl fluoride significantly inhibited the protease activity. The alkaline protease from B. gibsonii 6BS15-4 demonstrated efficiency in blood stain removal and could therefore be used as a detergent additive, with potential for various other industrial applications.

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