Bacteroides,Prevotella, andPorphyromonas

Shah, Haroun N.; Gharbia, Saheer E.; Olsen, Ingar

doi:10.1002/9780470688618.taw0075

Cited by 2 publications

(1 citation statement)

References 195 publications

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“…The six Bacteroidales species that contain BMV proviruses were isolated from humans (Table 1) and their genomes were sequenced as part of the Human Microbiome Project by NIH Human Microbiome Consortium [40]. In humans, Bacteroides constitute the dominant part of gut microbiota, whereas Prevotella are part of the normal flora of the human mouth and vagina [41]. Both Bacteroides and Prevotella are opportunistic human pathogens.…”

Section: Resultsmentioning

confidence: 99%

Microviridae Goes Temperate: Microvirus-Related Proviruses Reside in the Genomes of Bacteroidetes

2011

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The Microviridae comprises icosahedral lytic viruses with circular single-stranded DNA genomes. The family is divided into two distinct groups based on genome characteristics and virion structure. Viruses infecting enterobacteria belong to the genus Microvirus, whereas those infecting obligate parasitic bacteria, such as Chlamydia, Spiroplasma and Bdellovibrio, are classified into a subfamily, the Gokushovirinae. Recent metagenomic studies suggest that members of the Microviridae might also play an important role in marine environments. In this study we present the identification and characterization of Microviridae-related prophages integrated in the genomes of species of the Bacteroidetes, a phylum not previously known to be associated with microviruses. Searches against metagenomic databases revealed the presence of highly similar sequences in the human gut. This is the first report indicating that viruses of the Microviridae lysogenize their hosts. Absence of associated integrase-coding genes and apparent recombination with dif-like sequences suggests that Bacteroidetes-associated microviruses are likely to rely on the cellular chromosome dimer resolution machinery. Phylogenetic analysis of the putative major capsid proteins places the identified proviruses into a group separate from the previously characterized microviruses and gokushoviruses, suggesting that the genetic diversity and host range of bacteriophages in the family Microviridae is wider than currently appreciated.

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Section: Resultsmentioning

confidence: 99%

Microviridae Goes Temperate: Microvirus-Related Proviruses Reside in the Genomes of Bacteroidetes

2011

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Importance of inoculum source and initial community structure for biogas production from agricultural substrates

Liu

Sun

Müller

et al. 2017

Bioresource Technology

102

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This study evaluated the importance of inoculum source for start-up and operation of biogas processes. Three different inocula with different community structure were used to initiate six laboratory continuous stirred tank reactor (CSTR) processes operated with a grass manure mixture as substrate. The processes were evaluated by chemical and microbiological analysis, by targeting the overall bacterial community and potential cellulose-degrading bacteria. As expected, the results showed a large difference in community structure in the inocula and in process performance during the first hydraulic retention time (HRT). However, the performance and overall microbial community structure became similar in the reactors over time. An inoculum from a high-ammonia process, characterized by low diversity and low degradation efficiency, took the longest time to reach stability and final methane yield. The overall bacterial community was mainly shaped by the operating conditions but, interestingly, potential cellulose-degrading bacteria seemed mainly to originate from the substrate.

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Bacteroides,Prevotella, andPorphyromonas

Cited by 2 publications

References 195 publications

Microviridae Goes Temperate: Microvirus-Related Proviruses Reside in the Genomes of Bacteroidetes

Microviridae Goes Temperate: Microvirus-Related Proviruses Reside in the Genomes of Bacteroidetes

Importance of inoculum source and initial community structure for biogas production from agricultural substrates

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