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Sunday, July 7, 2019

Complete genome sequence of Lactobacillus helveticus MB2-1, a probiotic bacterium producing exopolysaccharides.

Lactobacillus helveticus MB2-1 is a probiotic bacterium producing exopolysaccharides (EPS), which was isolated from traditional Sayram ropy fermented milk in southern Xinjiang, China. The genome consists of a circular 2,084,058bp chromosome with no plasmid. The genome sequence indicated that this strain includes a 15.20kb gene cluster involved in EPS biosynthesis. Genome sequencing information has provided the basis for understanding the potential molecular mechanism behind the EPS production. Copyright © 2015 Elsevier B.V. All rights reserved.

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Sunday, July 7, 2019

Complete genome sequence of Lactobacillus paracasei CAUH35, a new strain isolated from traditional fermented dairy product koumiss in China.

Lactobacillus paracasei CAUH35 was isolated from homemade koumiss, a traditional fermented dairy product with beneficial effects on human health. The genome consists of a circular 2,770,411bp chromosome and four plasmids. Genome analysis revealed the presence of gene clusters involved in the production of exopolysaccharides and bacteriocin. The complete genome sequence of L. paracasei CAUH35 will provide genetic basis for further comparative and functional genomic analyses. Copyright © 2015. Published by Elsevier B.V.

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Sunday, July 7, 2019

Complete genome sequence of Lactobacillus paracasei L9, a new probiotic strain with high lactic acid-producing capacity.

Lactobaillus paracasei L9 (CGMCC No. 9800) is a new strain with probiotic properties originating from healthy human intestine. Previous studies evidenced that the strain regulates immune modulation and contributes to the production of high amounts of lactic acid. The genome of L. paracasei L9 contains a circular 3076,437-bp chromosome, encoding 3044 CDSs, 15 rRNA genes and 59 tRNA genes. Copyright © 2015. Published by Elsevier B.V.

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Sunday, July 7, 2019

Complete genome sequence of the probiotic bacterium Bifidobacterium breve KCTC 12201BP isolated from a healthy infant.

We present the completely sequenced genome of Bifidobacterium breve CBT BR3, which was isolated from the feces of a healthy infant. The 2.43-Mb genome contains several kinds of genetic factors associated with health promotion of the human host such as oligosaccharide-degrading genes and vitamin-biosynthetic genes. Copyright © 2015. Published by Elsevier B.V.

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Sunday, July 7, 2019

Complete genome sequence of Bifidobacterium longum KCTC 12200BP, a probiotic strain promoting the intestinal health.

Bifidobacteria constitute a major group of beneficial intestinal bacteria, and are therefore often used to formulate probiotic products in combination with lactic acid bacteria. The availability of bifidobacterial genome sequences has broadened our knowledge on health-promoting factors as well as their safety assessments. Here, we present the complete genome sequence of Bifidobacterium longum CBT BG7 that consists of a 2.45-Mb chromosome and a plasmid. Copyright © 2015. Published by Elsevier B.V.

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Sunday, July 7, 2019

Complete genome sequence of Propionibacterium freudenreichii DSM 20271(T).

Propionibacterium freudenreichii subsp. freudenreichii DSM 20271(T) is the type strain of species Propionibacterium freudenreichii that has a long history of safe use in the production dairy products and B12 vitamin. P. freudenreichii is the type species of the genus Propionibacterium which contains Gram-positive, non-motile and non-sporeforming bacteria with a high G?+?C content. We describe the genome of P. freudenreichii subsp. freudenreichii DSM 20271(T) consisting of a 2,649,166 bp chromosome containing 2320 protein-coding genes and 50 RNA-only encoding genes.

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Sunday, July 7, 2019

Methyltransferases acquired by lactococcal 936-type phage provide protection against restriction endonuclease activity

BACKGROUND:So-called 936-type phages are among the most frequently isolated phages in dairy facilities utilising Lactococcus lactis starter cultures. Despite extensive efforts to control phage proliferation and decades of research, these phages continue to negatively impact cheese production in terms of the final product quality and consequently, monetary return.RESULTS:Whole genome sequencing and in silico analysis of three 936-type phage genomes identified several putative (orphan) methyltransferase (MTase)-encoding genes located within the packaging and replication regions of the genome. Utilising SMRT sequencing, methylome analysis was performed on all three phages, allowing the identification of adenine modifications consistent with N-6 methyladenine sequence methylation, which…

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Sunday, July 7, 2019

Development of new methods for the quantitative detection and typing of Lactobacillus parabuchneri in dairy products

Thirty-one isolates of Lactobacillus parabuchneri were obtained from cheese containing histamine; of these, 26 were found to possess the hdcA gene encoding histidine decarboxylase. By analysing the genome data of 13 isolates, specific targets for the development of PCR-based detection and typing systems for L. parabuchneri were identified. The real-time PCR for detection showed a linear quantification over a range of 7 logs and a detection limit of 10 gene equivalents per reaction. The strain typing method utilised the amplification of repeat sequences and showed discrimination comparable with a phylogenetic tree, based on genome comparisons. The method was suitable for detecting…

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Sunday, July 7, 2019

Complete genome sequence of the dairy isolate Lactobacillus acidipiscis ACA-DC 1533.

Lactobacillus acidipiscis is a Gram-positive lactic acid bacterium belonging to the Lactobacillus salivarius clade. Here, we present the first complete genome sequence of L. acidipiscis isolated from traditional Greek Kopanisti cheese. Strain ACA-DC 1533 may play a key role in the strong organoleptic characteristics of Kopanisti cheese. Copyright © 2017 Kazou et al.

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Sunday, July 7, 2019

The complete genome sequence of the yogurt isolate Streptococcus thermophilus ACA-DC 2.

Streptococcus thermophilus ACA-DC 2 is a newly sequenced strain isolated from traditional Greek yogurt. Among the 14 fully sequenced strains of S. thermophilus currently deposited in the NCBI database, the ACA-DC 2 strain has the smallest chromosome, containing 1,731,838 bp. The annotation of its genome revealed the presence of 1,850 genes, including 1,556 protein-coding genes, 70 RNA genes and 224 potential pseudogenes. A large number of pseudogenes were identified. This was also accompanied by the absence of pathogenic features suggesting evolution of strain ACA-DC 2 through genome decay processes, most probably due to adaptation to the milk ecosystem. Analysis revealed the…

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Sunday, July 7, 2019

Complete genome sequence of Lactobacillus fermentum MTCC 25067 (formerly TDS030603), a viscous exopolysaccharide-producing strain isolated from Indian fermented milk.

Lactobacillus fermentum MTCC 25067 (formerly TDS030603) is capable of producing a highly viscous slime exopolysaccharide. We report here the complete genome sequence of the strain, which was deciphered by using PacBio single-molecule real-time sequencing technology. Copyright © 2017 Aryantini et al.

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Sunday, July 7, 2019

Detection and assessment of copy number variation using PacBio long-read and Illumina sequencing in New Zealand dairy cattle.

Single nucleotide polymorphisms have been the DNA variant of choice for genomic prediction, largely because of the ease of single nucleotide polymorphism genotype collection. In contrast, structural variants (SV), which include copy number variants (CNV), translocations, insertions, and inversions, have eluded easy detection and characterization, particularly in nonhuman species. However, evidence increasingly shows that SV not only contribute a substantial proportion of genetic variation but also have significant influence on phenotypes. Here we present the discovery of CNV in a prominent New Zealand dairy bull using long-read PacBio (Pacific Biosciences, Menlo Park, CA) sequencing technology and the Sniffles SV discovery…

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