The exceptionally large chloroplast genome of the green alga Floydiella terrestris illuminates the evolutionary history of the Chlorophyceae.

Genome Biology and Evolution
Jean-Simon BrouardMonique Turmel

Abstract

The Chlorophyceae, an advanced class of chlorophyte green algae, comprises five lineages that form two major clades (Chlamydomonadales + Sphaeropleales and Oedogoniales + Chaetopeltidales + Chaetophorales). The four complete chloroplast DNA (cpDNA) sequences currently available for chlorophyceans uncovered an extraordinarily fluid genome architecture as well as many structural features distinguishing this group from other green algae. We report here the 521,168-bp cpDNA sequence from a member of the Chaetopeltidales (Floydiella terrestris), the sole chlorophycean lineage not previously sampled for chloroplast genome analysis. This genome, which contains 97 conserved genes and 26 introns (19 group I and 7 group II introns), is the largest chloroplast genome ever sequenced. Intergenic regions account for 77.8% of the genome size and are populated by short repeats. Numerous genomic features are shared with the cpDNA of the chaetophoralean Stigeoclonium helveticum, notably the absence of a large inverted repeat and the presence of unique gene clusters and trans-spliced group II introns. Although only one of the Floydiella group I introns encodes a homing endonuclease gene, our finding of five free-standing reading frames having sim...Continue Reading

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Citations

Jun 5, 2012·Molecular Phylogenetics and Evolution·Molly R Letsch, Louise A Lewis
Jun 21, 2015·Annual Review of Microbiology·Miroslav Oborník, Julius Lukeš
Mar 30, 2011·The Plant Journal : for Cell and Molecular Biology·Beverley R Green
Feb 8, 2014·International Journal of Systematic and Evolutionary Microbiology·Kyeong Mi KimHwan Su Yoon
Mar 31, 2015·Proceedings of the National Academy of Sciences of the United States of America·David Roy Smith, Patrick J Keeling
Jul 4, 2015·Genome Biology and Evolution·Monique TurmelClaude Lemieux
Jun 23, 2012·Molecular Phylogenetics and Evolution·Elizabeth Rodríguez-SalinasDiego González-Halphen
Oct 30, 2016·Molecular Ecology Resources·Alex D Twyford, Rob W Ness
Jan 10, 2018·Frontiers in Plant Science·David R Smith
Aug 14, 2018·Genome Biology and Evolution·Hager GaoudaDavid Roy Smith
Nov 9, 2011·Nature Reviews. Microbiology·John P McCutcheon, Nancy A Moran
Jan 29, 2017·Journal of Phycology·Anchittha Satjarak, Linda E Graham
Mar 27, 2018·The New Phytologist·David Roy Smith
Dec 5, 2017·Current Biology : CB·Andrea Del CortonaOlivier De Clerck

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Datasets Mentioned

BETA
FJ968740
GU196268

Software Mentioned

EMBOSS
FRAMEALIGN
GBLOCKS
VMATCHSELECT
SEQUENCHER
SE
MKVTREE
Genetics Computer Group ( )
Blast
MacClade

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