The tetrapyrrole synthesis pathway as a model of horizontal gene transfer in euglenoids

Published on Feb 1, 2017in Journal of Phycology 3.00
· DOI :10.1111/jpy.12491
Bryan Lakey1
Estimated H-index: 1
(Michigan State University),
Richard E. Triemer25
Estimated H-index: 25
(Michigan State University)
Abstract
The history of euglenoids may have begun as early as ~2 bya. These early phagotrophs ate cyanobacteria, archaea, and eubacteria, and the subsequent appearance of red algae and chromalveolates provided euglenoids with additional food sources. Following the appearance of green algae, euglenoids acquired a chloroplast via a secondary endosymbiotic event with a green algal ancestor. This endosymbiosis also involved a massive transfer of nuclear-encoded genes from the symbiont nucleus to the host. Expecting these genes to have a green algal origin, this research has shown, through the use of DNA-sequences and the analysis of phylogenetic relationships, that many housekeeping genes have a red algal/chromalveolate ancestry. This suggested that many other endosymbiotic/horizontal gene transfers, which brought genes from chromalveolates to euglenoids, may have been taking place long before the acquisition of the chloroplast. The investigation of the origin of the enzymes involved in the tetrapyrrole synthesis pathway provided insights into horizontal gene transfer in euglenoids and demonstrated that the euglenoid nuclear genome is a mosaic comprised of genes from the ancestral lineage plus genes transferred endosymbiotically/horizontally from green, red, and chromalveolates lineages.
  • References (34)
  • Citations (4)
Cite
References34
Published on Apr 1, 1999in Photosynthesis Research 3.09
Samuel I. Beale27
Estimated H-index: 27
(Brown University)
The enzymes responsible for chlorophyll biosynthesis in plants, algae and cyanobacteria are identified and described, with emphasis on their protein composition and structure, required cofactors, physical and catalytic properties, protein-protein interactions and allosteric modulation of activity. Properties and features of the pathway that enable it to operate in a coordinated way while using unstable and light-sensitive intermediates in potentially hostile biochemical environments are discusse...
334 Citations Source Cite
Published on Jun 10, 1983in Journal of Biological Chemistry 4.01
J D Weinstein1
Estimated H-index: 1
,
S I Beale1
Estimated H-index: 1
Abstract delta-Aminolevulinic acid (ALA), the first committed precursor to the tetrapyrrole components of hemes and chlorophylls, is synthesized by two different routes in the photosynthetic phytoflagellate Euglena gracilis: directly from glutamate, mediated by a 5-carbon pathway, and via condensation of glycine and succinyl-CoA, catalyzed by the enzyme ALA synthase. The physiological roles of the two pathways were determined by administration of specifically 14C-labeled ALA precursors to cultur...
114 Citations
Published on Nov 1, 2015in Journal of Eukaryotic Microbiology 2.54
Matthew S. Bennett11
Estimated H-index: 11
(Michigan State University),
Richard E. Triemer25
Estimated H-index: 25
(Michigan State University)
Over the last few years multiple studies have been published outlining chloroplast genomes that represent many of the photosynthetic euglenid genera. However, these genomes were scattered throughout the euglenophyceaean phylogenetic tree, and focused on comparisons with Euglena gracilis. Here, we present a study exclusively on taxa within the Euglenaceae. Six new chloroplast genomes were characterized, those of Cryptoglena skujai, E. gracilis var. bacillaris, Euglena viridis, Euglenaria anabaena...
22 Citations Source Cite
Published on Mar 1, 2009in Molecular Biology and Evolution 10.22
Monique Turmel41
Estimated H-index: 41
(Laval University),
Marie-Christine Gagnon1
Estimated H-index: 1
(Laval University)
+ 2 AuthorsClaude Lemieux45
Estimated H-index: 45
(Laval University)
Because they represent the earliest divergences of the Chlorophyta and include the smallest known eukaryotes (e.g., the coccoid Ostreococcus), the morphologically diverse unicellular green algae making up the Prasinophyceae are central to our understanding of the evolutionary patterns that accompanied the radiation of chlorophytes and the reduction of cell size in some lineages. Seven prasinophyte lineages, four of which exhibit a coccoid cell organization (no flagella nor scales), were uncovere...
142 Citations Source Cite
Published on Mar 20, 2012in PLOS ONE 2.77
Štěpánka Hrdá4
Estimated H-index: 4
(Charles University in Prague),
Jan Fousek6
Estimated H-index: 6
(Academy of Sciences of the Czech Republic)
+ 2 AuthorsCestmir Vlcek30
Estimated H-index: 30
(Academy of Sciences of the Czech Republic)
Euglenids are a group of protists that comprises species with diverse feeding modes. One distinct and diversified clade of euglenids is photoautotrophic, and its members bear green secondary plastids. In this paper we present the plastid genome of the euglenid Eutreptiella, which we assembled from 454 sequencing of Eutreptiella gDNA. Comparison of this genome and the only other available plastid genomes of photosynthetic euglenid, Euglena gracilis, revealed that they contain a virtually identica...
36 Citations Source Cite
Published on Dec 1, 2005in Molecular Biology and Evolution 10.22
Miroslav Oborník27
Estimated H-index: 27
(University of British Columbia),
Beverley R. Green39
Estimated H-index: 39
(University of British Columbia)
Heme biosynthesis represents one of the most essential metabolic pathways in living organisms, providing the precursors for cytochrome prosthetic groups, photosynthetic pigments, and vitamin B 1 2 . Using genomic data, we have compared the heme pathway in the diatom Thalassiosira pseudonana and the red alga Cyanidioschyzon merolae to those of green algae and higher plants, as well as to those of heterotrophic eukaryotes (fungi, apicomplexans, and animals). Phylogenetic analyses showed the mosaic...
98 Citations Source Cite
Published on Mar 1, 2014in Journal of Eukaryotic Microbiology 2.54
Matthew S. Bennett11
Estimated H-index: 11
(Michigan State University),
Richard E. Triemer25
Estimated H-index: 25
(Michigan State University)
Since its creation in 1917 the genus Cyclidiopsis, and its validity, has been a source of debate among euglenid taxonomists. While many authors have supported its legitimacy, various other authors have considered it to be a subgenus of Astasia or even promoted its complete dissolution. In this study, we have sequenced the small subunit and large subunit ribosomal DNA of Cyclidiopsis acus, the type species for the genus. Subsequent phylogenetic analyses showed that C. acus grouped with taxa from ...
4 Citations Source Cite
Published on Mar 1, 2013in Journal of Eukaryotic Microbiology 2.54
Krystle E. Wiegert5
Estimated H-index: 5
(Michigan State University),
Matthew S. Bennett11
Estimated H-index: 11
(Michigan State University),
Richard E. Triemer25
Estimated H-index: 25
(Michigan State University)
The chloroplast genomes of two photosynthetic euglenoids, Colacium vesiculosum Ehrenberg (128,889 bp), and Strombomonas acuminata (Schmarda) Deflandre (144,167 bp) have been sequenced. These chloroplast genomes in combination with those of Euglena gracilis, Eutreptia viridis, and Eutreptiella gymnastica provide a snapshot of euglenoid chloroplast evolution allowing comparisons of gene content, arrangement, and expansion. The gene content of the five chloroplast genomes is very similar varying on...
18 Citations Source Cite
Published on Nov 1, 2012in Protist 2.70
Krystle E. Wiegert5
Estimated H-index: 5
(Michigan State University),
Matthew S. Bennett11
Estimated H-index: 11
(Michigan State University),
Richard E. Triemer25
Estimated H-index: 25
(Michigan State University)
The chloroplast genome of Eutreptia viridis Perty, a basal taxon in the photosynthetic euglenoid lineage, was sequenced and compared with that of Euglena gracilis Ehrenberg, a crown species. Several common gene clusters were identified and gene order, conservation, and sequence similarity was assessed through comparisons with Euglena gracilis . Significant gene rearrangements were present between Eutreptia viridis and Euglena gracilis chloroplast genomes. In addition, major expansion has occurre...
26 Citations Source Cite
Cited By4
Published on Aug 14, 2017in Advances in Botanical Research 1.39
Anna M.G. Vanclová2
Estimated H-index: 2
(Charles University in Prague),
Lucia Hadariová2
Estimated H-index: 2
(Charles University in Prague)
+ 1 AuthorsVladimír Hampl21
Estimated H-index: 21
(Charles University in Prague)
Abstract Euglenophytes obtained their plastids from a primary green alga related to extant genus Pyramimonas . The relatively recent establishment of this new organelle is an intriguing evolutionary phenomenon worth studying and comparing with other secondary plastids with a regard to their similarities and differences. A remarkably fast evolution driven by rapid intron gain and diversification is observed in euglenid plastid genomes which often tend to swell in size and rearrange while keeping ...
2 Citations Source Cite
Published on Mar 1, 2018in Harmful Algae 4.14
Yeong Du Yoo26
Estimated H-index: 26
(Kunsan National University),
Kyeong Ah Seong19
Estimated H-index: 19
(Kunsan National University)
+ 6 AuthorsBrian Palenik41
Estimated H-index: 41
(University of California, San Diego)
Abstract The phototrophic euglenophyte Eutreptiella eupharyngea often causes blooms in the coastal waters of many countries, but its mode of nutrition has not been assessed. This species has previously been considered as exclusively auxotrophic. To explore whether E. eupharyngea is a mixotrophic species, the protoplasm of E. eupharyngea cells were examined using light, epifluorescence, and transmission electron microscopy after eubacteria, the cyanobacterium Synechococcus sp., and diverse algal ...
1 Citations Source Cite
Published on Dec 1, 2018in Scientific Reports 4.12
Kristína Záhonová4
Estimated H-index: 4
(University of Ostrava),
Zoltán Füssy6
Estimated H-index: 6
+ 6 AuthorsMarek Eliáš27
Estimated H-index: 27
(University of Ostrava)
Euglenophytes are a familiar algal group with green alga-derived secondary plastids, but the knowledge of euglenophyte plastid function and evolution is still highly incomplete. With this in mind we sequenced and analysed the transcriptome of the non-photosynthetic species Euglena longa. The transcriptomic data confirmed the absence of genes for the photosynthetic machinery, but provided candidate plastid-localised proteins bearing N-terminal bipartite topogenic signals (BTSs) of the characteris...
3 Citations Source Cite
Published on Mar 11, 2019in bioRxiv
A. M. Novak Vanclova , Martin Zoltner8
Estimated H-index: 8
+ 9 AuthorsJulius Lukeš50
Estimated H-index: 50
Euglena gracilis is a well-studied biotechnologically exploitable phototrophic flagellate harbouring secondary green plastids. Here we describe its plastid proteome obtained by high-resolution proteomics. We identified 1,345 candidate plastid proteins and assigned functional annotations to 774 of them. More than 120 proteins are affiliated neither to the host lineage nor the plastid ancestor and may represent horizontal acquisitions from various algal and prokaryotic groups. Reconstruction of pl...
Source Cite