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June 20, 2019

Comparison of sequencing approaches applied to complex soil metagenomes to resolve proteins of interest

Background: Long-read sequencing presents several potential advantages for providing more complete gene profiling of metagenomic samples. Long reads can capture multiple genes in a single read, and longer reads typically result in assemblies with better contiguity, especially for higher abundance organisms. However, a major challenge with using long reads has been the higher cost per base, which may lead to insufficient coverage of low-abundance species. Additionally, lower single-pass accuracy can make gene discovery for low-abundance organisms difficult. Methods: To evaluate the pros and cons of long reads for metagenomics, we directly compared PacBio and Illumina sequencing on a soil-derived sample,…

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June 28, 2017

Coping with living in the soil: the genome of the parthenogenetic springtail Folsomia candida.

Folsomia candida is a model in soil biology, belonging to the family of Isotomidae, subclass Collembola. It reproduces parthenogenetically in the presence of Wolbachia, and exhibits remarkable physiological adaptations to stress. To better understand these features and adaptations to life in the soil, we studied its genome in the context of its parthenogenetic lifestyle.We applied Pacific Bioscience sequencing and assembly to generate a reference genome for F. candida of 221.7 Mbp, comprising only 162 scaffolds. The complete genome of its endosymbiont Wolbachia, was also assembled and turned out to be the largest strain identified so far. Substantial gene family expansions…

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June 15, 2017

Complete genome sequence of a Legionella longbeachae serogroup 1 strain isolated from a patient with Legionnaires’ disease.

Legionella longbeachae serogroup 1, predominantly found in soil and composted plant material, causes the majority of cases of Legionnaires' disease (LD) in New Zealand. Here, we report the complete genome sequence of an L. longbeachae serogroup 1 (sg1) isolate derived from a patient hospitalized with LD in Christchurch, New Zealand. Copyright © 2017 Slow et al.

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June 8, 2017

Complete genome sequence of Bacillus subtilis J-5, a potential biocontrol agent.

Bacillus subtilis J-5 was isolated from tomato rhizosphere soil and exhibited strong inhibitory activity against Botrytis cinerea To shed light on the molecular mechanism underlying the biological control on phytopathogens, the whole genome of this strain was sequenced. Genes encoding antimicrobial compounds and the regulatory systems were identified in the genome. Copyright © 2017 Jia et al.

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April 18, 2017

Genome mining and predictive functional profiling of acidophilic rhizobacterium Pseudomonas fluorescens Pt14.

Pseudomonas fluorescens Pt14 is a non-pathogenic and acidophilic bacterium isolated from acidic soil (pH 4.65). Genome sequencing of strain Pt14 was performed using Single Molecule Real Time (SMRT) sequencing to get insights into unique existence of this strain in acidic environment. Complete genome sequence of this strain revealed a chromosome of 5,841,722 bp having 5354 CDSs and 88 RNAs. Phylogenomic reconstruction based on 16S rRNA gene, Average Nucleotide Identity (ANI) values and marker proteins revealed that strain Pt14 shared a common clade with P. fluorescens strain A506 and strain SS101. ANI value of strain Pt14 in relation to strain A506 was…

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April 6, 2017

Genome sequence of the fungal strain 14919 producing 3-hydroxy-3-methylglutaryl–coenzyme A reductase inhibitor FR901512.

Fungal strain 14919 was originally isolated from a soil sample collected at Mt. Kiyosumi, Chiba Prefecture, Japan. It produces FR901512, a potent and strong 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitor. The genome sequence of fungal strain 14919 was determined and annotated to improve the productivity of FR901512. Copyright © 2017 Itoh et al.

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April 6, 2017

Draft genome sequence of the rhizobacterium Pseudomonas chlororaphis PCL1601, displaying biocontrol against soilborne phytopathogens.

In this study, we present the draft genome sequence of the bacterial strain Pseudomonas chlororaphis PCL1601. This bacterium was isolated from the rhizosphere of healthy avocado trees and displayed antagonistic and biological control activities against different soilborne phytopathogenic fungi and oomycetes. Copyright © 2017 Vida et al.

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April 4, 2016

Permanent improved high-quality draft genome sequence of Nocardia casuarinae strain BMG51109, an endophyte of actinorhizal root nodules of Casuarina glauca.

Here, we report the first genome sequence of a Nocardia plant endophyte, N. casuarinae strain BMG51109, isolated from Casuarina glauca root nodules. The improved high-quality draft genome sequence contains 8,787,999 bp with a 68.90% GC content and 7,307 predicted protein-coding genes. Copyright © 2016 Ghodhbane-Gtari et al.

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February 10, 2016

Complete genome of Streptomyces hygroscopicus subsp. limoneus KCTC 1717 (=KCCM 11405), a soil bacterium producing validamycin and diverse secondary metabolites.

Streptomyces hygroscopicus subsp. limoneus is a Gram-positive, aerobic, aerial mycelial, spore-forming bacterium that was first isolated from a soil sample in Akashi City, Hyogo Prefecture, Japan. We here report the complete genome of S. hygroscopicus subsp. limoneus KCTC 1717 (=KCCM 11405=IFO 12704=ATCC 21432), which consists of 10,537,932bp (G+C content of 71.96%) with two linear chromosomes, 8983 protein-coding genes, 67 tRNAs and 6 rRNA operons. Genes related to biosynthesis of validamycin, valienamine and diverse secondary metabolites were detected in this genome. Genomic data is thus expected to considerably improve our understanding of how industrially important aminocyclitols are biosynthesized by microbial cells.…

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January 20, 2016

Complete genome sequence of deoxynivalenol-degrading bacterium Devosia sp. strain A16.

The strain A16, capable of degrading deoxynivalenol was isolated from a wheat field and identified preliminarily as Devosia sp. Here, we present the genome sequence of the Devosia sp. A16, which has a size of 5,032,994bp, with 4913 coding sequences (CDSs). The annotated full genome sequence of the Devosia sp. A16 strain might shed light on the function of its degradation. Copyright © 2015 Elsevier B.V. All rights reserved.

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January 20, 2016

Complete genome sequence of Massilia sp. WG5, an efficient phenanthrene-degrading bacterium from soil.

Massilia sp. strain WG5 is a phenanthrene-degrading bacterium isolated from polycyclic aromatic hydrocarbons contaminated soil in Jiangsu, China. Here we present the features of the strain WG5 and its complete genome sequenced by two SMRTs-cell of PacBio RS II and corrected by Miseq. The genome contains one circular chromosome and two plasmids, which is including 6,049,576 nucleotides with 65.51% G+C content, 5,140 protein-coding genes, 111 RNA genes. Copyright © 2015 Elsevier B.V. All rights reserved.

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December 24, 2015

Exploring the genomic traits of fungus-feeding bacterial genus Collimonas.

Collimonas is a genus belonging to the class of Betaproteobacteria and consists mostly of soil bacteria with the ability to exploit living fungi as food source (mycophagy). Collimonas strains differ in a range of activities, including swimming motility, quorum sensing, extracellular protease activity, siderophore production, and antimicrobial activities.In order to reveal ecological traits possibly related to Collimonas lifestyle and secondary metabolites production, we performed a comparative genomics analysis based on whole-genome sequencing of six strains representing 3 recognized species. The analysis revealed that the core genome represents 43.1 to 52.7 % of the genomes of the six individual strains. These include…

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December 1, 2015

Soil microbial communities are shaped by plant-driven changes in resource availability during secondary succession.

Although we understand the ecological processes eliciting changes in plant community composition during secondary succession, we do not understand whether co-occurring changes in plant detritus shape saprotrophic microbial communities in soil. In this study, we investigated soil microbial composition and function across an old-field chronosequence ranging from 16 to 86 years following agricultural abandonment, as well as three forests representing potential late-successional ecosystems. Fungal and bacterial community composition was quantified from ribosomal DNA, and insight into the functional potential of the microbial community to decay plant litter was gained from shotgun metagenomics and extracellular enzyme assays. Accumulation of soil organic…

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