Analysis of Porphyra membrane transporters demonstrates gene transfer among photosynthetic eukaryotes and numerous sodium-coupled transport systems.

Plant Physiology
Cheong Xin ChanDebashish Bhattacharya

Abstract

Membrane transporters play a central role in many cellular processes that rely on the movement of ions and organic molecules between the environment and the cell, and between cellular compartments. Transporters have been well characterized in plants and green algae, but little is known about transporters or their evolutionary histories in the red algae. Here we examined 482 expressed sequence tag contigs that encode putative membrane transporters in the economically important red seaweed Porphyra (Bangiophyceae, Rhodophyta). These contigs are part of a comprehensive transcriptome dataset from Porphyra umbilicalis and Porphyra purpurea. Using phylogenomics, we identified 30 trees that support the expected monophyly of red and green algae/plants (i.e. the Plantae hypothesis) and 19 expressed sequence tag contigs that show evidence of endosymbiotic/horizontal gene transfer involving stramenopiles. The majority (77%) of analyzed contigs encode transporters with unresolved phylogenies, demonstrating the difficulty in resolving the evolutionary history of genes. We observed molecular features of many sodium-coupled transport systems in marine algae, and the potential for coregulation of Porphyra transporter genes that are associated ...Continue Reading

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Citations

Jan 30, 2014·Mobile Genetic Elements·Cheong Xin Chan, Debashish Bhattacharya
Jul 24, 2012·Trends in Plant Science·Alison R TaylorGlen L Wheeler
Feb 15, 2020·PLoS Biology·Rachael WadeFilipe Alberto
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Dec 1, 2012·Journal of Phycology·Cheong Xin ChanDebashish Bhattacharya
May 21, 2020·The Journal of Membrane Biology·Jyoti Kumari, Mangal S Rathore

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