Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese
Background and objectiveLactose intolerance is a discomfort state that occurs in some people after ingestion of milk and it is due to insufficient amount of beta galactosidase in the human gut to digest lactose. The aim of this study was to observe the presence of beta galactosidase enzyme produced...
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| Format: | Article |
| Language: | fas |
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Qom University of Medical Sciences
2008-04-01
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| Series: | Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum |
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| Online Access: | http://journal.muq.ac.ir/library/upload/article/87.5.4.pdf |
| _version_ | 1818497366766911488 |
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| author | J. Nowroozi N. Rahbar Roshandel E. Gheytanchi |
| author_facet | J. Nowroozi N. Rahbar Roshandel E. Gheytanchi |
| author_sort | J. Nowroozi |
| collection | DOAJ |
| description | Background and objectiveLactose intolerance is a discomfort state that occurs in some people after ingestion of milk and it is due to insufficient amount of beta galactosidase in the human gut to digest lactose. The aim of this study was to observe the presence of beta galactosidase enzyme produced by isolated lactobacilli from milk and cheese. Methods In this descriptive study, milk and cheese samples with different brand were bought from different shops. Lactobacilli were identified by plating samples on MRS medium, Gram staining and standard biochemical methods. β-galactosidase production by bacteria was assessed by X-Gal and ONPG methods. β-galactosidase was also detected by SDS-PAGE. ResultsFourteen genus of lactobacillus were isolated From 50 samples. All of the bacteria produced green color colonies on X-Gal plates (but in different times) that indicated the presence of enzyme in the bacteria. All isolated lactobacilli were shown β-galactosidase activity in ONPG test. The highest enzymatic activity was seen in one strain of Lactobacillus Delbrueckii (1966 Miller unit /ml). In some bacteria (37%) a strong β-galactosidase band(116-kDa) was seen by SDS-PAGE.ConclusionAddition of beta galactosidase containing lactobacilli as a probiotic agent to milk, cheese, and other dairy products could ameliorate lactose intolerance. Meanwhile X-gal and ONPG methods which are simple, rapid and cheap can be used instead of SDS-PAGE.Keywords: Lactobacillus, Beta-Galactosidase, Nitrophenylgalactosids |
| first_indexed | 2024-12-10T18:44:54Z |
| format | Article |
| id | doaj.art-ae79482ba8e24cf1b5b10fdc6c708b7a |
| institution | Directory Open Access Journal |
| issn | 1735-7799 2008-1375 |
| language | fas |
| last_indexed | 2024-12-10T18:44:54Z |
| publishDate | 2008-04-01 |
| publisher | Qom University of Medical Sciences |
| record_format | Article |
| series | Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum |
| spelling | doaj.art-ae79482ba8e24cf1b5b10fdc6c708b7a2022-12-22T01:37:33ZfasQom University of Medical SciencesMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum1735-77992008-13752008-04-01212734Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and CheeseJ. NowrooziN. Rahbar RoshandelE. GheytanchiBackground and objectiveLactose intolerance is a discomfort state that occurs in some people after ingestion of milk and it is due to insufficient amount of beta galactosidase in the human gut to digest lactose. The aim of this study was to observe the presence of beta galactosidase enzyme produced by isolated lactobacilli from milk and cheese. Methods In this descriptive study, milk and cheese samples with different brand were bought from different shops. Lactobacilli were identified by plating samples on MRS medium, Gram staining and standard biochemical methods. β-galactosidase production by bacteria was assessed by X-Gal and ONPG methods. β-galactosidase was also detected by SDS-PAGE. ResultsFourteen genus of lactobacillus were isolated From 50 samples. All of the bacteria produced green color colonies on X-Gal plates (but in different times) that indicated the presence of enzyme in the bacteria. All isolated lactobacilli were shown β-galactosidase activity in ONPG test. The highest enzymatic activity was seen in one strain of Lactobacillus Delbrueckii (1966 Miller unit /ml). In some bacteria (37%) a strong β-galactosidase band(116-kDa) was seen by SDS-PAGE.ConclusionAddition of beta galactosidase containing lactobacilli as a probiotic agent to milk, cheese, and other dairy products could ameliorate lactose intolerance. Meanwhile X-gal and ONPG methods which are simple, rapid and cheap can be used instead of SDS-PAGE.Keywords: Lactobacillus, Beta-Galactosidase, Nitrophenylgalactosidshttp://journal.muq.ac.ir/library/upload/article/87.5.4.pdfLactobacillusBeta-GalactosidaseNitrophenylgalactosids |
| spellingShingle | J. Nowroozi N. Rahbar Roshandel E. Gheytanchi Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum Lactobacillus Beta-Galactosidase Nitrophenylgalactosids |
| title | Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese |
| title_full | Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese |
| title_fullStr | Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese |
| title_full_unstemmed | Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese |
| title_short | Study of β-Galactosidase Enzyme Activity Produced by Lactobacilli in Milk and Cheese |
| title_sort | study of β galactosidase enzyme activity produced by lactobacilli in milk and cheese |
| topic | Lactobacillus Beta-Galactosidase Nitrophenylgalactosids |
| url | http://journal.muq.ac.ir/library/upload/article/87.5.4.pdf |
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