Roseobacticides: Small Molecule Modulators of an Algal-Bacterial Symbiosis
摘要:
Marine bacteria and microalgae engage in dynamic symbioses mediated by small molecules. A recent study of Phaeobacter gallaeciensis, a member of the large roseobacter clade of alpha-proteobacteria, and Emilionia huxleyi, a prominent member of the microphytoplankton found in large algal blooms, revealed that an algal senescence signal produced by E. huxleyi elicits the production of novel algaecides, the roseobacticides, from the bacterial symbiont. In this report, the generality of these findings are examined by expanding the number of potential elicitors. This expansion led to the identification of nine new members of the roseobacticide family, rare bacterial troponoids, which provide insights into both their biological roles and their biosynthesis. The qualitative and quantitative changes in the levels of roseobacticides induced by the additional elicitors and the elicitors' varied efficiencies support the concept of host-targeted roseobacticide production. Structures of the new family members arise from variable substituents at the C3 and C7 positions of the roseobacticide core as the diversifying elements and suggest that the roseobacticides result from modifications and combinations of aromatic amino acids. Together these studies support a model in which algal senescence converts a mutualistic bacterial symbiont into an opportunistic parasite of its hosts.
Embodiments of the invention relate to compounds and methods for controlling algal growth, for example, in bodies of water or surfaces exposed to algae. Provided are compounds having algicidal activities and methods of use of these compounds as well as formulations and compositions comprising the compound having algicidal activities.
[EN] ROSEOBACTICIDES AND USES THEREOF<br/>[FR] ROSÉOBACTICIDES ET LEURS UTILISATIONS
申请人:HARVARD COLLEGE
公开号:WO2012033631A2
公开(公告)日:2012-03-15
Embodiments of the invention relate to compounds and methods for controlling algal growth, for example, in bodies of water or surfaces exposed to algae. Provided are compounds having algicidal activities and methods of use of these compounds as well as formulations and compositions comprising the compound having algicidal activities.
Roseobacticides: Small Molecule Modulators of an Algal-Bacterial Symbiosis
作者:Mohammad R. Seyedsayamdost、Gavin Carr、Roberto Kolter、Jon Clardy
DOI:10.1021/ja207172s
日期:2011.11.16
Marine bacteria and microalgae engage in dynamic symbioses mediated by small molecules. A recent study of Phaeobacter gallaeciensis, a member of the large roseobacter clade of alpha-proteobacteria, and Emilionia huxleyi, a prominent member of the microphytoplankton found in large algal blooms, revealed that an algal senescence signal produced by E. huxleyi elicits the production of novel algaecides, the roseobacticides, from the bacterial symbiont. In this report, the generality of these findings are examined by expanding the number of potential elicitors. This expansion led to the identification of nine new members of the roseobacticide family, rare bacterial troponoids, which provide insights into both their biological roles and their biosynthesis. The qualitative and quantitative changes in the levels of roseobacticides induced by the additional elicitors and the elicitors' varied efficiencies support the concept of host-targeted roseobacticide production. Structures of the new family members arise from variable substituents at the C3 and C7 positions of the roseobacticide core as the diversifying elements and suggest that the roseobacticides result from modifications and combinations of aromatic amino acids. Together these studies support a model in which algal senescence converts a mutualistic bacterial symbiont into an opportunistic parasite of its hosts.