| Production of volatile compounds by Lactobacillus sakei from branched chain α-keto acids. | |
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MedLine Citation:
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PMID: 22202876 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Lactobacillus sakei belongs to the main flora of raw fermented sausages and is used as starter culture. Bacterial starter cultures can convert amino acids to α-keto acids by aminotransferases. These α-keto acids are the precursors of aroma active aldehydes, alcohols and carboxylic acids. In this study the formation of aldehydes, alcohols and carboxylic acids from leucine, isoleucine, valine and the corresponding α-keto acids are analysed in model fermentations with two different strains of L sakei. In the absence and upon addition of leucine, isoleucine and valine they produced 1 μg/ml 3-methylbutanoic, 0.2 μg/ml 2-methylbutanoic acid and 3 μg/ml 2-methylpropanoic acid, respectively. Upon addition of α-ketoisocaproic acid, α-keto-3-methyl-pentanoic acid or α-ketoisovaleric acid the amount of the corresponding carboxylic acid was increased to 40 μg/ml 3-methylbutanoic acid, 20 μg/ml 2-methylbutanoic acid and 35 μg/ml 2-methylpropanoic acid. The response patterns of the strains and amounts of carboxylic acids produced were similar. This behaviour was typical when compared with other strains of L. sakei and suggests general lack of transaminase activity and a limit in the transport of branched chain amino acids and their conversion to volatiles, some of which can contribute to the aroma of fermented sausages. |
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Authors:
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K Amelie Gutsche; Thi Bich Thao Tran; Rudi F Vogel |
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Publication Detail:
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Type: Journal Article Date: 2011-06-21 |
Journal Detail:
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Title: Food microbiology Volume: 29 ISSN: 1095-9998 ISO Abbreviation: Food Microbiol. Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2011-12-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8601127 Medline TA: Food Microbiol Country: England |
Other Details:
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Languages: eng Pagination: 224-8 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Technische Universität München, Lehrstuhl für Technische Mikrobiologie, Weihenstephaner Steig 16, D-85350 Freising, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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