H 1 Proton Channels in Dinoflagellates: Not Just for Bioluminescence?
Molecular and Cellular Biology
Bioluminescence in dinoflagellates is controlled by H 1 proton channels. Database searches of dinoflagellate transcriptomes and genomes yielded hits with sequence features diagnostic of all confirmed H 1, and show that H 1 is widely distributed in the dinoflagellate phylogeny including the basal species Oxyrrhis marina. Multiple sequence alignments followed by phylogenetic analysis revealed three major subfamilies of H 1 that do not correlate with presence of theca, autotrophy, geographic location, or bioluminescence. These data suggest that most dinoflagellates express a H 1 which has a function separate from bioluminescence. Sequence evidence also suggests that dinoflagellates can contain more than one H 1 gene.
The Journal of eukaryotic microbiology
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