NDLI: Chitin Hydrolysis by Listeria spp., Including L. monocytogenes ▿

Content Provider	PubMed Central
Author	Leisner, J. J. Larsen, M. H. Jørgensen, R. L. Brøndsted, L. Thomsen, L. E. Ingmer, H.
Abstract	Listeria spp., including the food-borne pathogen Listeria monocytogenes, are ubiquitous microorganisms in the environment and thus are difficult to exclude from food processing plants. The factors that contribute to their multiplication and survival in nature are not well understood, but the ability to catabolize various carbohydrates is likely to be very important. One major source of carbon and nitrogen in nature is chitin, an insoluble linear β-1,4-linked polymer of N-acetylglucosamine (GlcNAc). Chitin is found in cell walls of fungi and certain algae, in the cuticles of arthropods, and in shells and radulae of molluscs. In the present study, we demonstrated that L. monocytogenes and other Listeria spp. are able to hydrolyze α-chitin. The chitinolytic activity is repressed by the presence of glucose in the medium, suggesting that chitinolytic activity is subjected to catabolite repression. Activity is also regulated by temperature and is higher at 30°C than at 37°C. In L. monocytogenes EGD, chitin hydrolysis depends on genes encoding two chitinases, lmo0105 (chiB) and lmo1883 (chiA), but not on a gene encoding a putative chitin binding protein (lmo2467). The chiB and chiA genes are phylogenetically related to various well-characterized chitinases. The potential biological implications of chitinolytic activity of Listeria are discussed.
Related Links	http://dx.doi.org/10.1128/aem.02701-07
Ending Page	3830
Page Count	8
Starting Page	3823
File Format	PDF
ISSN	00992240
e-ISSN	10985336
Journal	Applied and Environmental Microbiology
Issue Number	12
Volume Number	74
Language	English
Publisher	American Society for Microbiology (ASM)
Publisher Date	2008-06-15
Access Restriction	Open
Rights Holder	American Society for Microbiology (ASM)
Subject Keyword	Biotechnology Food Science Ecology Applied Microbiology and Biotechnology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Ecology Food Science Applied Microbiology and Biotechnology Biotechnology

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