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Orr, Russell John Scott; Zhao, Sen; Klaveness, Dag; Yabuki, Akinori; Ikeda, Keiji & Watanabe, Makoto M.
(2018).
Correction to: Enigmatic Diphyllatea eukaryotes: culturing and targeted PacBio RS amplicon sequencing reveals a higher order taxonomic diversity and global distribution.
BMC Evolutionary Biology.
ISSN 1471-2148.
18(1).
doi:
10.1186/s12862-018-1233-y.
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Orr, Russell; Rombauts, Stephane; Van de Peer, Yves & Shalchian-Tabrizi, Kamran
(2017).
Erratum: "Draft genome sequences of two unclassified Chitinophagaceae bacteria, IBVUCB1 and IBVUCB2, isolated from environmental samples" [Genome Announc, 5, 33, (2017), (e00787-17)] DOI:10.1128/genomeA.00787-17.
Microbiology Resource Announcements (MRA).
ISSN 2169-8287.
5(41:e01152-17),
p. 1–1.
doi:
10.1128/genomeA.01152-17.
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Orr, Russell; Rombauts, Stephane; Van de Peer, Yves & Shalchian-Tabrizi, Kamran
(2017).
Draft genome sequences of two unclassified Chitinophagaceae bacteria, IBVUCB1 and IBVUCB2, isolated from environmental samples.
Microbiology Resource Announcements (MRA).
ISSN 2169-8287.
5(33),
p. 1–3.
doi:
10.1128/genomeA.00787-17.
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Orr, Russell; Rombauts, Stephane; Van de Peer, Yves & Shalchian-Tabrizi, Kamran
(2017).
Draft genome sequences of two unclassified bacteria, Sphingomonas sp. strains IBVSS1 and IBVSS2, isolated from environmental samples.
Microbiology Resource Announcements (MRA).
ISSN 2169-8287.
5:e00894-17(34),
p. 1–3.
doi:
10.1128/genomeA.00894-17.
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Orr, Russell; Rombauts, S; Van De Peer, Yves & Shalchian-Tabrizi, Kamran
(2017).
Erratum to "Draft Genome Sequences of Two Unclassified Bacteria, Sphingomonas sp. Strains IBVSS1 and IBVSS2, Isolated from Environmental Samples" [Genome Announc., 2017, 5 (34):e00894-17.] Doi: 10.1128/genomeA.00894-17.
Microbiology Resource Announcements (MRA).
ISSN 2169-8287.
5(41).
doi:
10.1128/genomeA.01175-17.
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(2017).
Deep Genome Initiative.
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(2017).
Genome Dynamics in early eukaryote evolution an update!
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(2017).
Genome dynamics in early eukaryote evolution, progress rapport!
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(2016).
Genome dynamics in early eukaryotic evolution. Importance of enigmatic lineages.
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(2016).
Genome dynamics in early eukaryotic evolution. Importance of enigmatic lineages.
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(2016).
PacBio sequencing reveals the diversity and ecology of a deeply diverging eukaryote lineage.
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Enevoldsen, Emily; Boeve, Jeroen; Orr, Russell; Waeschenbach, Andrea & Liow, Lee Hsiang
(2016).
Advancing bryozoan phylogenetics: mitochondrial and nuclear genes.
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Orr, Russell; Zhao, Sen; Yabuki, Akinori & Shalchian-Tabrizi, Kamran
(2016).
PacBio sequencing reveals the diversity and ecology of a deeply diverging eukaryote lineage.
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(2015).
Genome dynamics in early eukaryotic evolution. Importance of enigmatic lineages.
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(2015).
Genome dynamics in early eukaryotic evolution. Importance of enigmatic lineages.
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Enevoldsen, Emily; Liow, Lee Hsiang; Voje, Kjetil L.; Orr, Russell; Shalchian-Tabrizi, Kamran & Krabberød, Anders Kristian
(2014).
Macroevolution through molecular and morphological lenses: a history of microporellids.
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(2014).
Genome dynamics in early eukaryotic evolution: importance of enigmatic lineages.
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(2014).
Genome dynamics in early eukaryotic evolution: importance of enigmatic lineages.
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(2014).
Genome dynamics in early eukaryotic evolution: importance of enigmatic lineages.
Show summary
The origin of the eukaryotic cell from its bacterial ancestor is probably the most complex transition in evolution. Understanding the mechanisms of, and reasons for this major evolutionary transition is of fundamental importance for both cellular and evolutionary biology. To reconstruct the origin and evolution of the eukaryote cell one needs to study the changes that have occurred to an organisms hereditary information (genome) over time; from the most primitive to the most modern organisms. Recent improvements
to the eukaryote tree of life have divided organisms it into a small number
of so-called supergroups. These supergroups encompass the majority
of living eukaryotes but there are still some enigmatic species that place external to these known groupings. Some of these species represent our earliest ancestors, and as such, are of major importance to understanding how the eukaryotic cell has evolved over time. Projects that map eukaryotic genomes are yet to study a species outside the known supergroups. Though, such a genome will give insight and resolution into how eukaryotes have evolved from a bacterial ancestor toward advanced eukaryotes. The overall objective of this project is therefore to explore the dynamics of genome changes that have occurred during evolution. This will be investigated by mapping the genomes from numerous enigmatic species that fall outside
of the known supergroups. This information will then be compared with that of other eukaryotic organisms that place within the know groupings. The project builds on recent developments in techniques used for the extraction of genome information and comparison thereof, to focus on fundamental questions about the origin and evolution of eukaryotes. The project can therefore have significant bearing on central evolutionary issues and further our understanding of the developments that have occurred during eukaryotic evolution. The project will increase general understanding of processes that have form
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Stüken, Anke ; Figueroa, Rosa; Orr, Russell & Jakobsen, Kjetill Sigurd
(2012).
Is sxt gene copy number related to saxitoxin synthesis?
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Stüken, Anke ; Orr, Russell; Kellmann, Ralf; Murray, Shauna A.; Neilan, Brett A. & Jakobsen, Kjetill Sigurd
(2011).
Discovery of nucelar-encoded genes for the neurotoxin saxitoxin in dinoflagellates.
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Stüken, Anke ; Orr, Russell; Kellmann, Ralf; Murray, Shauna A.; Neilan, Brett A. & Jakobsen, Kjetill Sigurd
(2011).
Discovery of nucelar-encoded genes for the neurotoxin saxitoxin in dinoflagellates.
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Dittami, Simon; Riisberg, Ingvild; John, Uwe; Orr, Russell; Shalchian-Tabrizi, Kamran & Jakobsen, Kjetill Sigurd
(2010).
Analysis of expressed sequence tags from the ichtyotoxic dictyochophyte Pseudochattonella farcimen.
Show summary
Pseudochattonella farcimen (Eikrem, Edvardsen, et Throndsen) is an ichthyotoxic alga within the Dictyochophyceae (Heterokonta), which has been shown to form blooms in Scandinavian waters every year since 1998. To improve our understanding of the biology of this alga and to facilitate future genomic studies, we report the sequencing and analysis of >10,000 expressed sequence tags (ESTs) corresponding to 8149 unique sequences from this species.
A direct comparison with EST libraries from other heterokonts revealed several functional categories to be significantly overrepresented among the P. facimen ESTs, such as genes involved in cell communication, transporters, or genes targeted to cell organelles. Interestingly, P. farcimen ESTs also code for a high proportion (1.4%) of proteins related to fatty acid metabolism, including eight fatty acid desaturases and two phospholipase A2 genes. Three of the desaturases belong to a family of delta-4 desaturases, known so far only from haptophytes, where they catalyze the conversion of n3-docosapentaenoic (n3-DPA) acid to docosahexaenoic acid (DHA). These findings may partially explain the unusual fatty acid profiles observed in P. farcimen and are discussed both from an evolutionary point of view and in relation the ichthyotoxic effects of this alga.
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Stüken, Anke ; Orr, Russell; Kellmann, Ralf; Murray, Shauna A.; Mihali, Troco Kaan & Neilan, Brett A.
(2010).
Saxitoxin gene identified in dinoflagellates.
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Orr, Russell; Stüken, Anke ; Rundberget, Thomas; Eikrem, Wenche & Jakobsen, Kjetill Sigurd
(2010).
Improved phylogenetic resolution of toxic and non-toxic Alexandrium strains using a concatenated rDNA approach.
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Orr, Russell; Stüken, Anke ; Rundberget, Thomas; Eikrem, Wenche & Jakobsen, Kjetill Sigurd
(2010).
Improved phylogenetic resolution of toxic and non-toxic Alexandrium strains using a concatenated rDNA approach.
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Shalchian-Tabrizi, Kamran; Minge, Marianne Aastebøl; Espelund, Mari; Orr, Russell; Ruden, Torgeir A. & Jakobsen, Kjetill Sigurd
(2008).
The Choanozoan Ministeria vibrans: Multigene Phylogeny and the Origin of Animals.
Show summary
Ministeria vibrans is a unicellular protozoan belonging to the phylum Choanozoa, the evolutionary closest related group to the animals.
Ministeria is a minute bacteria-eating cell possessing slender radiating tentacles, that has recently been shown to be the most close relative to Capsaspora, another protozoan with thread-like (filose) tentacles. Forming the novel clade Filasterea, Ministeria/Capsaspora was shown to be sister to animals and choanoflagellates. Presumably, their last common ancestor evolved filose tentacles well before they were aggregated as a periciliary collar in the choanoflagellates. Several successive evolutionary innovations occurred among the unicellular closest relatives of the animals prior to the origin of multicellularity.
We have analysed an EST library from this early branching choanozoan organism and have found many domains of key significance for animal cell biology. New domain combinations as well as domain duplications must have taken place along the path to multicellularity.
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Minge, Marianne Aastebøl; Silberman, Jeffrey; Orr, Russell; Cavalier-Smith, Thomas; Shalchian-Tabrizi, Kamran & Burki, Fabien
[Show all 7 contributors for this article]
(2008).
Breviata anathema - an unusual Amoebozoa.
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Orr, Russell; Espelund, Mari; Kellmann, Ralf & Jakobsen, Kjetill Sigurd
(2008).
Evolution witihin the genus Alexandrium focusing on toxicity.