NDLI: Genome analysis of the smallest free-living eukaryote Ostreococcus tauri unveils many unique features

Content Provider	PubMed Central
Author	Derelle, Evelyne Ferraz, Conchita Stephane, Rombauts Pierre, Rouzé Worden, Alexandra Z. Steven, Robbens Frédéric, Partensky Degroeve, Sven Sophie, Echeynié Cooke, Richard Saeys, Yvan Wuyts, Jan Jabbari, Kamel Bowler, Chris Olivier, Panaud Benoît, Piégu Ball, Steven G. Jean-philippe, Ral Bouget, François-yves Piganeau, Gwenael De Baets, Bernard Picard, André Michel, Delseny Jacques, Demaille Peer, Yves Van De Moreau, Hervé
Copyright Year	2006
Abstract	The green lineage is reportedly 1,500 million years old, evolving shortly after the endosymbiosis event that gave rise to early photosynthetic eukaryotes. In this study, we unveil the complete genome sequence of an ancient member of this lineage, the unicellular green alga Ostreococcus tauri (Prasinophyceae). This cosmopolitan marine primary producer is the world’s smallest free-living eukaryote known to date. Features likely reflecting optimization of environmentally relevant pathways, including resource acquisition, unusual photosynthesis apparatus, and genes potentially involved in C4 photosynthesis, were observed, as was downsizing of many gene families. Overall, the 12.56-Mb nuclear genome has an extremely high gene density, in part because of extensive reduction of intergenic regions and other forms of compaction such as gene fusion. However, the genome is structurally complex. It exhibits previously unobserved levels of heterogeneity for a eukaryote. Two chromosomes differ structurally from the other eighteen. Both have a significantly biased G+C content, and, remarkably, they contain the majority of transposable elements. Many chromosome 2 genes also have unique codon usage and splicing, but phylogenetic analysis and composition do not support alien gene origin. In contrast, most chromosome 19 genes show no similarity to green lineage genes and a large number of them are specialized in cell surface processes. Taken together, the complete genome sequence, unusual features, and downsized gene families, make O. tauri an ideal model system for research on eukaryotic genome evolution, including chromosome specialization and green lineage ancestry.
Related Links	http://dx.doi.org/10.1073/pnas.0604795103
Ending Page	11652
Page Count	6
Starting Page	11647
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	31
Volume Number	103
Language	English
Publisher	National Academy of Sciences
Publisher Date	2006-08-01
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Genome analysis of the smallest free-living eukaryote Ostreococcus tauri unveils many unique features.

Integrated systems biology and imaging of the smallest free-living eukaryote Ostreococcus tauri

Genome-wide analysis of RING finger proteins in the smallest free-living photosynthetic eukaryote Ostreococus tauri.

The Complete Chloroplast and Mitochondrial DNA Sequence of Ostreococcus tauri: Organelle Genomes of the Smallest Eukaryote Are Examples of Compaction

The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation

Lack of heme synthesis in a free-living eukaryote

The Naegleria genome: a free-living microbial eukaryote lends unique insights into core eukaryotic cell biology

The medium-size noncoding RNA transcriptome of Ostreococcus tauri, the smallest living eukaryote, reveals a large family of small nucleolar RNAs displaying multiple genomic expression strategies

Codon-triplet context unveils unique features of the Candida albicans protein coding genome

Genome analysis of the smallest free-living eukaryote Ostreococcus tauri unveils many unique features

Similar Documents

Genome analysis of the smallest free-living eukaryote Ostreococcus tauri unveils many unique features.

Integrated systems biology and imaging of the smallest free-living eukaryote Ostreococcus tauri

Genome-wide analysis of RING finger proteins in the smallest free-living photosynthetic eukaryote Ostreococus tauri.

The Complete Chloroplast and Mitochondrial DNA Sequence of Ostreococcus tauri: Organelle Genomes of the Smallest Eukaryote Are Examples of Compaction

The tiny eukaryote Ostreococcus provides genomic insights into the paradox of plankton speciation

Lack of heme synthesis in a free-living eukaryote

The Naegleria genome: a free-living microbial eukaryote lends unique insights into core eukaryotic cell biology

The medium-size noncoding RNA transcriptome of Ostreococcus tauri, the smallest living eukaryote, reveals a large family of small nucleolar RNAs displaying multiple genomic expression strategies

Codon-triplet context unveils unique features of the Candida albicans protein coding genome

Genome analysis of the smallest free-living eukaryote Ostreococcus tauri unveils many unique features