Category: Dinoflagellate genomics

Dinoflagellates are responsible for most marine harmful algal blooms (HABs) and play vital roles in many ocean processes. More than 90% of dinoflagellates are vitamin B(12) auxotrophs and that B(12) availability can control dinoflagellate HABs, yet the genetic basis of B(12) auxotrophy in dinoflagellates in the framework of the ecology of dinoflagellates and particularly HABs, which was the objective of this work. Here, we investigated the presence, phylogeny, and transcription of two methionine…

Dinoflagellates are responsible for most marine harmful algal blooms (HABs) and play vital roles in many ocean processes. More than 90% of dinoflagellates are vitamin B(12) auxotrophs and that B(12) availability can control dinoflagellate HABs, yet the genetic basis of B(12) auxotrophy in dinoflagellates in the framework of the ecology of dinoflagellates and particularly HABs, which was the objective of this work. Here, we investigated the presence, phylogeny, and transcription of two methionine…

The diversity of marine cyanobacteria has been extensively studied due to their vital roles in ocean primary production. However, little is understood about the diversity of cyanobacterial species involved in symbiotic relationships. In this study, we successfully sequenced the complete genome of a cyanobacterium in symbiosis with Citharistes regius, a dinoflagellate species thriving in the open ocean. A phylogenomic analysis revealed that the cyanobacterium (CregCyn) belongs to the marine…

CONCLUSIONS: Our results provide the first window into the 5-hmU and chromatin accessibility landscapes in dinoflagellates.

CONCLUSIONS: Our results provide the first window into the 5-hmU and chromatin accessibility landscapes in dinoflagellates.

Dinoflagellates are diverse and ecologically important protists characterized by many morphological and molecular traits that set them apart from other eukaryotes. These features include, but are not limited to, massive genomes organized using bacterially-derived histone-like proteins (HLPs) and dinoflagellate viral nucleoproteins (DVNP) rather than histones, and a complex history of photobiology with many independent losses of photosynthesis, numerous cases of serial secondary and tertiary…

Dinoflagellates are diverse and ecologically important protists characterized by many morphological and molecular traits that set them apart from other eukaryotes. These features include, but are not limited to, massive genomes organized using bacterially-derived histone-like proteins (HLPs) and dinoflagellate viral nucleoproteins (DVNP) rather than histones, and a complex history of photobiology with many independent losses of photosynthesis, numerous cases of serial secondary and tertiary…

Dinoflagellates in the family Symbiodiniaceae are taxonomically diverse, predominantly symbiotic lineages that are well-known for their association with corals. The ancestor of these taxa is believed to have been free-living. The establishment of symbiosis (i.e., symbiogenesis) is hypothesised to have occurred multiple times during Symbiodiniaceae evolution, but its impact on genome evolution of these taxa is largely unknown. Among Symbiodiniaceae, the genus Effrenium is a free-living lineage…

Dinoflagellates in the family Symbiodiniaceae are taxonomically diverse, predominantly symbiotic lineages that are well-known for their association with corals. The ancestor of these taxa is believed to have been free-living. The establishment of symbiosis (i.e., symbiogenesis) is hypothesised to have occurred multiple times during Symbiodiniaceae evolution, but its impact on genome evolution of these taxa is largely unknown. Among Symbiodiniaceae, the genus Effrenium is a free-living lineage…

Dinoflagellates are a diverse group of ecologically significant micro-eukaryotes that can serve as a model system for plastid symbiogenesis due to their susceptibility to plastid loss and replacement via serial endosymbiosis. Kareniaceae harbor fucoxanthin-pigmented plastids instead of the ancestral peridinin-pigmented ones and support them with a diverse range of nucleus-encoded plastid-targeted proteins originating from the haptophyte endosymbiont, dinoflagellate host, and/or lateral gene…