Journal article

The complete chloroplast genome of the chlorarachniophyte Bigelowiella natans: Evidence for independent origins of chlorarachniophyte and euglenid secondary endosymbionts

Matthew B Rogers, Paul R Gilson, Vanessa Su, Geoffrey I McFadden, Patrick J Keeling

MOLECULAR BIOLOGY AND EVOLUTION | OXFORD UNIV PRESS | Published : 2007

Abstract

Chlorarachniophytes are amoeboflagellate cercozoans that acquired a plastid by secondary endosymbiosis. Chlorarachniophytes are the last major group of algae for which there is no completely sequenced plastid genome. Here we describe the 69.2-kbp chloroplast genome of the model chlorarachniophyte Bigelowiella natans. The genome is highly reduced in size compared with plastids of other photosynthetic algae and is closer in size to genomes of several nonphotosynthetic plastids. Unlike nonphotosynthetic plastids, however, the B. natans chloroplast genome has not sustained a massive loss of genes, and it retains nearly all of the functional photosynthesis-related genes represented in the genomes..

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