Consulta: creatorFacets:"Barbeyron, Tristan"
Registros recuperados: 5
Data/hora: 04/06/2024 08:00:17

Evolutionary Evidence of Algal Polysaccharide Degradation Acquisition by Pseudoalteromonas carrageenovora 9(T) to Adapt to Macroalgal Niches
Provedor de dados: 5
Autores: Gobet, Angelique; Barbeyron, Tristan; Matard-mann, Maria; Magdelenat, Ghislaine; Vallenet, David; Duchaud, Eric; Michel, Gurvan.
About half of seaweed biomass is composed of polysaccharides. Most of these complex polymers have a marked polyanionic character. For instance, the red algal cell wall is mainly composed of sulfated galactans, agars and carrageenans, while brown algae contain alginate and fucose-containing sulfated polysaccharides (FCSP) as cell wall polysaccharides. Some marine heterotrophic bacteria have developed abilities to grow on such macroalgal polysaccharides. This is the case of Pseudoalteromonas carrageenovora 9(T) (ATCC 43555(T)), a marine gammaproteobacterium isolated in 1955 and which was an early model organism for studying carrageenan catabolism. We present here the genomic analysis of P. carrageenovora. Its genome is composed of two chromosomes and of a...
Tipo: Text
Palavras-chave: Carrageenan; CAZymes; Alginate; Gammaproteobacteria; Pseudoalteromonas; Marine bacteria; Algal holobiont; Biofilm.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00489/60070/63377.pdf

Genome and metabolic network of "Candidatus Phaeomarinobacter ectocarpi" Ec32, a new candidate genus of Alphaproteobacteria frequently associated with brown algae
Provedor de dados: 5
Autores: Dittami, Simon M.; Barbeyron, Tristan; Boyen, Catherine; Cambefort, Jeanne; Collet, Guillaume; Delage, Ludovic; Gobet, Angelique; Groisillier, Agnes; Leblanc, Catherine; Michel, Gurvan; Scornet, Delphine; Siegel, Anne; Tapia, Javier E.; Tonon, Thierry.
Rhizobiales and related orders of Alphaproteobacteria comprise several genera of nodule-inducing symbiotic bacteria associated with plant roots. Here we describe the genome and the metabolic network of "Candidatus Phaeomarinobacter ectocarpi" Ec32, a member of a new candidate genus closely related to Rhizobiales and found in association with cultures of the filamentous brown algal model Ectocarpus. The "Ca. P. ectocarpi" genome encodes numerous metabolic pathways that may be relevant for this bacterium to interact with algae. Notably, it possesses a large set of glycoside hydrolases and transporters, which may serve to process and assimilate algal metabolites. It also harbors several proteins likely to be involved in the synthesis of algal hormones such as...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00488/59944/63183.pdf

A Functional Study of Transforming Growth Factor-Beta from the Gonad of Pacific Oyster Crassostrea gigas
Provedor de dados: 5
Autores: Corporeau, Charlotte; Groisillier, Agnes; Jeudy, Alexandra; Barbeyron, Tristan; Fleury, Elodie; Fabioux, Caroline; Czjzek, Mirjam; Huvet, Arnaud.
The transforming growth factor (TGF)-beta superfamily is a group of important growth factors involved in multiple processes such as differentiation, cell proliferation, apoptosis and cellular growth. In the Pacific oyster Crassostrea gigas, the oyster gonadal (og) TGF-beta gene was recently characterized through genome-wide expression profiling of oyster lines selected to be resistant or susceptible to summer mortality. Og TGF-beta appeared specifically expressed in the gonad to reach a maximum when gonads are fully mature, which singularly contrasts with the pleiotropic roles commonly ascribed to most TGF-beta family members. The function of og TGF-beta protein in oysters is unknown, and defining its role remains challenging. In this study, we develop a...
Tipo: Text
Palavras-chave: Transforming growth factor-beta; Bacterial expression; In vivo antibody inhibition; Reproduction; Crassostrea gigas; Marine bivalve.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00042/15371/13438.pdf

Alpha-agarases define a new family of glycoside hydrolases, distinct from beta-agarase families
Provedor de dados: 5
Autores: Flament, Didier; Barbeyron, Tristan; Jam, Murielle; Potin, Philippe; Czjzek, Mirjam; Kloareg, Bernard; Michel, Gurvan.
The gene encoding the alpha-agarase from "Alteromonas agarilytica" (proposed name) has been cloned and sequenced. The gene product (154 kDa) is unrelated to Beta-agarases and instead belongs to a new family of glycoside hydrolases (GH96). The -agarase also displays a complex modularity, with the presence of five thrombospondin type 3 repeats and three carbohydrate-binding modules.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2826.pdf

The Complete Genome Sequence of the Fish Pathogen Tenacibaculum maritimum Provides Insights into Virulence Mechanisms
Provedor de dados: 5
Autores: Perez-pascual, David; Lunazzi, Aurelie; Magdelenat, Ghislaine; Rouy, Zoe; Roulet, Alain; Lopez-roques, Celine; Larocque, Robert; Barbeyron, Tristan; Gobet, Angelique; Michel, Gurvan; Bernardet, Jean-francois; Duchaud, Eric.
Tenacibaculum maritimum is a devastating bacterial pathogen of wild and farmed marine fish with a broad host range and a worldwide distribution. We report here the complete genome sequence of the T. maritimum type strain NCIMB 2154(T). The genome consists of a 3,435,971-base pair circular chromosome with 2,866 predicted protein-coding genes. Genes encoding the biosynthesis of exopolysaccharides, the type IX secretion system, iron uptake systems, adhesins, hemolysins, proteases, and glycoside hydrolases were identified. They are likely involved in the virulence process including immune escape, invasion, colonization, destruction of host tissues, and nutrient scavenging. Among the predicted virulence factors, type IX secretion-mediated and cell-surface...
Tipo: Text
Palavras-chave: Tenacibaculum maritimum; Fish pathogen; Virulence factors; Genome; Toxins.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00488/59939/63150.pdf