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      Draft Genome Sequences of Clostridium tyrobutyricum Strains FAM22552 and FAM22553, Isolated from Swiss Semihard Red-Smear Cheese

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          Abstract

          Clostridium tyrobutyricum is the main microorganism responsible for late blowing defect in cheeses. Here, we present the draft genome sequences of two C. tyrobutyricum strains isolated from a Swiss semihard red-smear cheese. The two draft genomes comprise 3.05 and 3.08 Mbp and contain 3,030 and 3,089 putative coding sequences, respectively.

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          Identification of Clostridium tyrobutyricum as the causative agent of late blowing in cheese by species-specific PCR amplification.

          Butyric acid fermentation, the late-blowing defect in cheese, caused by the outgrowth of clostridial spores present in raw milk, can create considerable loss of product, especially in the production of semihard cheeses like Gouda cheese, but also in grana and Gruyère cheeses. To demonstrate the causative relationship between Clostridium tyrobutyricum and late blowing in cheese, many cheesemaking experiments were performed to provoke this defect by using spores from several strains of the major dairy-related clostridia. A method of PCR amplification of a part of the 16S rRNA gene in combination with hybridization with species-specific DNA probes was developed to allow the specific detection of clostridial sequences in DNAs extracted from cheeses. The sensitivity was increased by using nested PCR. Late blowing was provoked in experimental cheeses with 28 of the 32 C. tyrobutyricum strains tested, whereas experimental cheeses made with spores from C. beijerinckii, C. butyricum, and C. sporogenes showed no signs of butyric acid fermentation. In all experimental and commercial cheeses with obvious signs of late blowing, DNA from C. tyrobutyricum was detected; in some cheeses, signals for C. beijerinckii were also found. It was concluded that only C. tyrobutyricum strains are able to cause butyric acid fermentation in cheese.
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            Genome Sequence of Clostridium tyrobutyricum ATCC 25755, a Butyric Acid-Overproducing Strain

            Clostridium tyrobutyricum ATCC 25755 is an efficient producer of butyric acid. Here we report a 3.01-Mb assembly of its genome sequence and other useful information, including the coding sequences (CDSs) responsible for an alternative pathway leading to acetate synthesis as well as a series of membrane transport systems.
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              Draft Genome Sequence of Clostridium tyrobutyricum Strain UC7086, Isolated from Grana Padano Cheese with Late-Blowing Defect

              Clostridium tyrobutyricum is considered the main agent of late-blowing defect in the production of hard cheese. Here, we described the draft genome sequences and annotation of C. tyrobutyricum strain UC7086, which was isolated from Grana Padano cheese with blowing defect, and C. tyrobutyricum DSM 2637 type strain in a comparative study.
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                Author and article information

                Journal
                Genome Announc
                Genome Announc
                ga
                ga
                GA
                Genome Announcements
                American Society for Microbiology (1752 N St., N.W., Washington, DC )
                2169-8287
                12 March 2015
                Mar-Apr 2015
                : 3
                : 2
                : e00078-15
                Affiliations
                [a ]Institute for Food Sciences, Agroscope, Bern, Switzerland
                [b ]Interfaculty Bioinformatics Unit, University of Bern and Swiss Institute of Bioinformatics, Bern, Switzerland
                Author notes
                Address correspondence to Michelangelo Storari, michelangelo.storari@ 123456agroscope.admin.ch .
                Article
                genomeA00078-15
                10.1128/genomeA.00078-15
                4357748
                25767226
                af45ffb8-f297-4590-afb2-2962c426d2c2
                Copyright © 2015 Storari et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported license.

                History
                : 22 January 2015
                : 2 February 2015
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 12, Pages: 2, Words: 1129
                Categories
                Prokaryotes
                Custom metadata
                March/April 2015
                free

                Genetics
                Genetics

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