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Cross-exchange of B-vitamins underpins a mutualistic interaction between Ostreococcus tauri and Dinoroseobacter shibae.
Cooper, Matthew B; Kazamia, Elena; Helliwell, Katherine E; Kudahl, Ulrich Johan; Sayer, Andrew; Wheeler, Glen L; Smith, Alison G.
Afiliación
  • Cooper MB; Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK.
  • Kazamia E; Faculty of Biology, Medicine and Health, The University of Manchester, Michael Smith Building, Oxford Road, Manchester, M13 9PT, UK.
  • Helliwell KE; Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK.
  • Kudahl UJ; Institut de Biologie de l'École Normale Supérieure, 46 Rue d'Ulm, Paris, 75005, France.
  • Sayer A; Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK.
  • Wheeler GL; Marine Biological Association of UK, The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK.
  • Smith AG; Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK.
ISME J ; 13(2): 334-345, 2019 02.
Article en En | MEDLINE | ID: mdl-30228381
Ostreococcus tauri, a picoeukaryotic alga that contributes significantly to primary production in oligotrophic waters, has a highly streamlined genome, lacking the genetic capacity to grow without the vitamins thiamine (B1) and cobalamin (B12). Here we demonstrate that the B12 and B1 auxotrophy of O. tauri can be alleviated by co-culturing with a heterotrophic bacterial partner Dinoroseobacter shibae, a member of the Rhodobacteraceae family of alpha-proteobacteria, genera of which are frequently found associated with marine algae. D. shibae lacks the complete pathway to synthesise three other B-vitamins: niacin (B3), biotin (B7), and p-aminobenzoic acid (a precursor for folate, B9), and the alga is in turn able to satisfy the reciprocal vitamin requirements of its bacterial partner in a stable long-term co-culture. Bioinformatics searches of 197 representative marine bacteria with sequenced genomes identified just nine species that had a similar combination of traits (ability to make vitamin B12, but missing one or more genes for niacin and biotin biosynthesis enzymes), all of which were from the Rhodobacteraceae. Further analysis of 70 species from this family revealed the majority encoded the B12 pathway, but only half were able to make niacin, and fewer than 13% biotin. These characteristics may have either contributed to or resulted from the tendency of members of this lineage to adopt lifestyles in close association with algae. This study provides a nuanced view of bacterial-phytoplankton interactions, emphasising the complexity of the sources, sinks and dynamic cycling between marine microbes of these important organic micronutrients.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Simbiosis / Complejo Vitamínico B / Rhodobacteraceae / Chlorophyta Tipo de estudio: Prognostic_studies Idioma: En Revista: ISME J Asunto de la revista: MICROBIOLOGIA / SAUDE AMBIENTAL Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Simbiosis / Complejo Vitamínico B / Rhodobacteraceae / Chlorophyta Tipo de estudio: Prognostic_studies Idioma: En Revista: ISME J Asunto de la revista: MICROBIOLOGIA / SAUDE AMBIENTAL Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido