A common red algal origin of the apicomplexan, dinoflagellate, and heterokont plastids

0347277 - BC 2011 RIV US eng J - Journal Article
Janouškovec, J. - Horák, A. - Oborník, Miroslav - Lukeš, Julius - Keeling, P. J.
A common red algal origin of the apicomplexan, dinoflagellate, and heterokont plastids.
Proceedings of the National Academy of Sciences of the United States of America. Roč. 107, č. 24 (2010), s. 10949-10954. ISSN 0027-8424. E-ISSN 1091-6490
R&D Projects: GA AV ČR IAA601410907
Institutional research plan: CEZ:AV0Z60220518
Keywords : Apicomplexa * Chromera velia * CCMP3155 * plastid evolution * chloroplast genome
Subject RIV: EB - Genetics ; Molecular Biology
Impact factor: 9.771, year: 2010

Here we describe the complete plastid genome sequences and plastid-associated data from two independent photosynthetic lineages represented by Chromera velia and an undescribed alga CCMP3155 that we show are closely related to apicomplexans. These plastids contain a suite of features retained in either apicomplexan (four plastid membranes, the ribosomal superoperon, conserved gene order) or dinoflagellate plastids (form II Rubisco acquired by horizontal transfer, transcript polyuridylylation, thylakoids stacked in triplets) and encode a full collective complement of their reduced gene sets. Together with whole plastid genome phylogenies, these characteristics provide multiple lines of evidence that the extant plastids of apicomplexans and dinoflagellates were inherited by linear descent from a common red algal endosymbiont. Our phylogenetic analyses also support their close relationship to plastids of heterokont algae, indicating they all derive from the same endosymbiosis.
Permanent Link: http://hdl.handle.net/11104/0188086