Artículos de revistas
Metagenomics unveils the attributes of the alginolytic guilds of sediments from four distant cold coastal environments
Fecha
2016-12-18Registro en:
Matos, Marina Nadia; Lozada, Mariana; Anselmino Dieterle, Luciano Emanuel; Musumeci, Matias Alejandro; Henrissat, Bernard; et al.; Metagenomics unveils the attributes of the alginolytic guilds of sediments from four distant cold coastal environments; Wiley Blackwell Publishing, Inc; Environmental Microbiology; 18; 12; 18-12-2016; 4471-4484
1462-2912
CONICET Digital
CONICET
Autor
Matos, Marina Nadia
Lozada, Mariana
Anselmino Dieterle, Luciano Emanuel
Musumeci, Matias Alejandro
Henrissat, Bernard
Jansson, Janet K.
Mac Cormack, Walter Patricio
Carroll, JoLynn
Sjöling, Sara
Lundgren, Leif
Dionisi, Hebe Monica
Resumen
Alginates are abundant polysaccharides in brown algae that constitute an important energy source for marine heterotrophic bacteria. Despite the key role of alginate degradation processes in the marine carbon cycle, little information is available on the bacterial populations involved in these processes. The aim of this work was to gain a better understanding of alginate utilization capabilities in cold coastal environments. Sediment metagenomes from four high-latitude regions of both Hemispheres were interrogated for alginate lyase gene homologue sequences and their genomic context. Sediments contained highly abundant and diverse bacterial assemblages with alginolytic potential, including members of Bacteroidetes and Proteobacteria, as well as several poorly characterized taxa. The microbial communities in Arctic and Antarctic sediments exhibited the most similar alginolytic profiles, whereas brackish sediments showed distinct structures with a higher proportion of novel genes. Examination of the gene neighbourhood of the alginate lyase homologues revealed distinct patterns depending on the potential lineage of the scaffolds, with evidence of evolutionary relationships among alginolytic gene clusters from Bacteroidetes and Proteobacteria. This information is relevant for understanding carbon fluxes in cold coastal environments and provides valuable information for the development of biotechnological applications from brown algae biomass.