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Genetic diversity of b-glucuronidase activity among 14 strains of the dominant human gut anaerobe Ruminococcus gnavus Genet. Mol. Biol.
Beaud,Diane; Ladiré,Monique; Azevedo,Vasco; Bridonneau,Chantal; Anba-Mondoloni,Jamila.
Bacterial beta-glucuronidase activity in the gut increases the enterohepatic circulation of toxic compounds and plays a major role in the etiology of colon cancer. Previously, we had found that the gus gene, which codes for beta-glucuronidase in a dominant anaerobic species of the gut microbiota, Ruminococcus gnavus strain E1, is transcribed as part of an operon that includes three ORFs that code for beta-glucoside permeases of the phosphotransferase systems. This genetic organization had never been described. We have now compared beta-glucuronidase activity and the genetic environment of the gus gene in 14 strains of Ruminococcus gnavus.We found that five out of the seven glucuronidase-positive R. gnavus strains possessed another glucuronidase gene...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ruminococcus gnavus; Glucuronidases; Digestive microbiota.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000200026
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Seasonal and algal diet-driven patterns of the digestive microbiota of the European abalone Haliotis tuberculata, a generalist marine herbivore ArchiMer
Gobet, Angelique; Mest, Laetitia; Perennou, Morgan; Dittami, Simon M.; Caralp, Claire; Coulombet, Celine; Huchette, Sylvain; Roussel, Sabine; Michel, Gurvan; Leblanc, Catherine.
Background: Holobionts have a digestive microbiota with catabolic abilities allowing the degradation of complex dietary compounds for the host. In terrestrial herbivores, the digestive microbiota is known to degrade complex polysaccharides from land plants while in marine herbivores, the digestive microbiota is poorly characterized. Most of the latter are generalists and consume red, green, and brown macroalgae, three distinct lineages characterized by a specific composition in complex polysaccharides, which represent half of their biomass. Subsequently, each macroalga features a specific epiphytic microbiota, and the digestive microbiota of marine herbivores is expected to vary with a monospecific algal diet. We investigated the effect of four...
Tipo: Text Palavras-chave: Microbe-host interactions; Digestive microbiota; Abalone; Macroalgae; Holobiont.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00489/60071/63368.pdf
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