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Cryptophyta (0):
Recent article
Cryptophyta
Abstract
We mined a number of publicly available databases to identify members of this family in a broad range of organisms. LIL proteins are diverse, having one to three predicted transmembrane helices. One- and two-helix LIL proteins were found in all the major photosynthetic eukaryote lineages (glaucophyt...
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PMID: 20130750
PDF is available here.
PDF is available here.
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BMC Genomics (11) 2010
Abstract
We sequenced cDNA from Dinophysis acuminata, its ciliate prey M. rubra, and the cryptophyte source of the plastid Geminigera cryophila. We identified five proteins complete with plastid-targeting peptides encoded in the nuclear genome of D. acuminata that function in photosystem stabilization and me...
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PMID: 20537123
PDF is available here.
PDF is available here.
Abstract
Spatial distribution pattern of heterotrophic flagellates within a macroscopically homogenous sphagnum parcel of a transitional bog in the southern taiga was studied. Under investigation was horizontal pattern at different scales (1 cm, 10 cm, 1 m, 10 m) and the vertical heterogeneity of the communi...
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PMID: 19326857
PDF is available here.
PDF is available here.
Environmental Microbiology (10)10 2008
Abstract
We have inferred the evolutionary relationships among marine and freshwater species in order to better understand the importance of the marine-freshwater boundary on the historical diversification patterns of cryptomonads. We have constructed improved molecular phylogenies by taking into account rat...
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PMID: 18643928
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1777)9 2008
Abstract
I (PSI) monomers and peripheral Chl a/c(2) proteins were found. The most common complexes have Chl a/c(2) complexes at both sides of the PSI core monomer and have dimensions of about 17x24 nm. The peripheral antenna in these supercomplexes shows no obvious similarities in size and/or shape with that...
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PMID: 18513489
PDF is available here.
PDF is available here.
Abstract
We describe the first such protein, the GTPase EFL. EFL was characterized from 7 chlorarachniophytes, and 2 distinct types were found. One is related to foraminiferan EFL and lacks an amino-terminal extension. The second, distantly related, type encodes an amino-terminal extension consisting of a si...
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PMID: 18599495
PDF is available here.
PDF is available here.
Abstract
We describe a new approach for parasite discovery, utilizing denaturing high-performance liquid chromatography (DHPLC) reverse-phase ion-pairing technology. Systematic investigations of major DHPLC variables, including temperature, gradient conditions, and target amplicon characteristics were conduc...
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PMID: 18502933
PDF is available here.
PDF is available here.
Nucleic Acids Research (36)9 2008
Abstract
We explore the distribution, structure and function of group II introns in the plastid genomes of distantly and closely related cryptophytes. The predicted secondary structures of six introns contained in three different genes were examined and found to be generally similar to group II introns but u...
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PMID: 18397952
PDF is available here.
PDF is available here.
Biophysical Journal (94)6 2008
Abstract
I and photosystem II with very high efficiency on a 100-ps timescale. The excitation energy trapping times for both photosystem I ( approximately 30 ps) and photosystem I (200 and approximately 540 ps) correspond well to those obtained from experiments on isolated photosystems. The results are compa...
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PMID: 18024506
PDF is available here.
PDF is available here.
Abstract
Analysis of the amino acid composition of prion protein using a newly developed program for radar-chart deviation analysis has identified an abnormality or irregularity of the N-terminal flexible domain. Aromatic amino acids Trp and His together with Gly are abnormally abounding in this N-terminal d...
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PMID: 18991771
PDF is available here.
PDF is available here.
BMC Plant Biology (8)1 2008
Abstract
Orf222, one of the uncharacterized nucleomorph-specific open reading frames of the cryptophyte Guillardia theta, shows homology to slr1649 of Synechocystis sp. PCC 6803. Recently a further homolog from Synechococcus sp. PCC 7002 was characterized to encode a phycocyanin-beta155-bilin lyase. Here we...
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PMID: 18485196
PDF is available here.
PDF is available here.
BMC Genomics (9)1 2008
Abstract
The H. andersenii mtDNA is 60,553 bp in size and encodes 30 structural RNAs and 36 protein-coding genes, all located on the same strand. A prominent feature of the genome is the presence of a approximately 20 Kbp long intergenic region comprised of numerous tandem and dispersed repeat units of betwe...
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PMID: 18474103
PDF is available here.
PDF is available here.
Abstract
We present the complete 0.572-Mbp nucleomorph genome of the cryptophyte Hemiselmis andersenii and show that it is completely devoid of spliceosomal introns and genes for splicing RNAs-a case of complete intron loss in a nuclear genome. Comparison of H. andersenii proteins to those encoded in the sli...
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PMID: 18077423
PDF is available here.
PDF is available here.
Abstract
We have sequenced the plastid genome of Rhodomonas salina CCMP1319: at 135,854 bp, it is the largest secondary plastid genome characterized thus far. It also possesses interesting features not seen in the distantly related cryptophyte Guillardia theta or in other red secondary plastids, including ps...
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PMID: 17522086
PDF is available here.
PDF is available here.
Abstract
We use phylogenomics with expressed sequence tag (EST) data from the ecologically important coccolithophore-forming alga Emiliania huxleyi and the plastid-lacking cryptophyte Goniomonas cf. pacifica to establish their phylogenetic positions in the eukaryotic tree. Haptophytes and cryptophytes are me...
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PMID: 17488740
PDF is available here.
PDF is available here.
Microbial Ecology (54)1 2007
Abstract
We studied the effect of P. parvum allelochemicals on the lysis of the nontoxic and nonaxenic cryptomonad Rhodomonas salina and the consequent release of dissolved organic carbon (DOC). Changes in production, cell density, and biomass of associated bacteria were measured over 12 h. Six different com...
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PMID: 17345140
PDF is available here.
PDF is available here.
Current Biology (17)10 2007
Abstract
We know the relationship between cryptomonads and other algae, and this has been controversial. Several recent analyses have suggested a relationship between plastids of cryptomonads and some or all other red alga-containing lineages [3-6], but we must also know whether host nuclear genes mirror thi...
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PMID: 17462896
PDF is available here.
PDF is available here.
Abstract
We identified several genes sharing homology with components of the ER-associated degradation (ERAD) machinery of yeast and higher eukaryotes, namely ORF201 and ORF477, homologs of membrane-bound proteins, Der1p (Degradation in the ER protein 1) and the RING-finger ubiquitin ligase Hrd1, and a trunc...
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PMID: 17244602
PDF is available here.
PDF is available here.
Abstract
We investigated the diversity and the global distribution of this group by analyzing 18S rDNA sequences from marine environmental clone libraries published in GenBank as well as several unpublished sequences from the Indian Ocean. Phylogenetic analyses of the identified sequences suggest that the Te...
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PMID: 17196879
PDF is available here.
PDF is available here.
Abstract
We present the results of two small-scale sequencing surveys of fosmid clone libraries from two distantly related cryptomonads, Rhodomonas salina CCMP1319 and Cryptomonas paramecium CCAP977/2A, corresponding to approximately 150 and approximately 235 kb of sequence, respectively. Very few of the ran...
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PMID: 17211547
PDF is available here.
PDF is available here.
Microbial Ecology (53)1 2007
Abstract
We analyzed the sterol composition of the algivorous ciliates Balanion planctonicum and Urotricha farcta and compared it to the sterol composition of their diet--the cryptomonad Cryptomonas phaseolus. The sterol composition of the ciliates did not resemble that of their algal diet. Ergosterol [(22E)...
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PMID: 17186159
PDF is available here.
PDF is available here.
Journal of Physical Chemistry B (110)49 2006
Abstract
We report an investigation of energy migration dynamics in intact cells of the photosynthetic cryptophyte Rhodomonas CS24 using analyses of steady-state and time-resolved fluorescence anisotropy measurements. By fitting a specific model to the fluorescence data, we obtain three time scales (17, 58,...
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PMID: 17149931
PDF is available here.
PDF is available here.
Abstract
We have shown that a nuclear encoded PPC protein of G. theta expressed in P. tricornutum leads to a localization, recently described as being a "bloblike structure," which can be obtained by mutation of plastid protein-targeting sequences of the diatom itself. Here we present further nucleus-encoded...
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PMID: 16971693
PDF is available here.
PDF is available here.
Science of the Total Environment (369)1-3 2006
Abstract
We have investigated is a good model for nonspecific aquatic toxicity towards the three protozoas. Furthermore, correlation equations for nonspecific aqueous toxicity towards various biological systems, that we have found in this work and in previous studies, cover such a wide range that no single w...
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PMID: 16759684
PDF is available here.
PDF is available here.
Abstract
We revealed that EFL is present in both species, but, contrary to expectations, we found EF-1alpha in neither. On balance, we suggest the previously reported EF-1alpha from Rhodomonas salina is likely an artefact of contamination. We also identified EFL in EST data from two members of the dinoflagel...
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PMID: 16904374
PDF is available here.
PDF is available here.
Abstract
Abstract
We have identified a novel group of protist small subunit (SSU) rDNA sequences that do not correspond to any phylogenetic group previously identified. Comparison with other sequences obtained from cultures of heterotrophic protists showed that the environmental sequences grouped together with Telone...
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PMID: 16790418
PDF is available here.
PDF is available here.
Abstract
We isolated genes encoding enzymes involved in two different biochemical pathways, both of which are predicted to be localized inside the periplastidal compartment, and compared their topogenic signals to those of precursor proteins for the plastid stroma, which are encoded on either the nucleus or...
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PMID: 16752208
PDF is available here.
PDF is available here.
Eukaryotic Cell (5)6 2006
Abstract
We demonstrated the presence of both plastidic triose phosphate transporter and plastidic ATP/ADP transporter activities in proteoliposomes harboring either total membranes or plastid envelope membranes from G. theta. These molecular and biochemical data are discussed with respect to the environment...
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PMID: 16757744
PDF is available here.
PDF is available here.
Journal of Plant Research (119)3 2006
Abstract
These results possibly represent the evolutionary fate of the symbiont actin gene in cryptomonads, which was firstly transferred from the symbiont nucleus or nucleomorph, to the host nucleus and became a pseudogene and then finally disappeared there....
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PMID: 16570126
PDF is available here.
PDF is available here.
Abstract
We have investigated the structure and content of nucleomorph genomes in a wide range of cryptomonad algae. In this study, we have sequenced nine new cryptomonad nucleomorph 18S ribosomal DNA (rDNA) genes and four heat shock protein 90 (hsp90) gene fragments, and using pulsed-field gel electrophores...
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PMID: 16306383
PDF is available here.
PDF is available here.
Abstract
The use of functional endpoints in risk assessment of pollutants for marine pelagic communities is scarce, especially for the function of zooplankton communities. This work presents a rapid, inexpensive and ecologically relevant technique to assess the effect of toxic compounds on the grazing rates...
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PMID: 16386297
PDF is available here.
PDF is available here.
Abstract
We have cloned eight new PRK sequences from complex algae as well as a rhodophyte in order to investigate their evolutionary origin. All available PRK sequences were used for phylogenetic analyses and the significance of alternative topologies was estimated by the approximately unbiased test. Our an...
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PMID: 16474987
PDF is available here.
PDF is available here.
Abstract
We describe the first exception to this canonical nucleomorph genome architecture in the cryptomonad Hemiselmis rufescens CCMP644. Using pulsed-field gel electrophoresis (PFGE), we estimate the size of the H. rufescens nucleomorph genome to be approximately 580 kb, slightly larger than the G. theta...
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PMID: 17123416
PDF is available here.
PDF is available here.
Abstract
Here, we test whether the phylogenetically distinct nucleomorph genomes of the cryptomonad, Guillardia theta, and the chlorarachniophyte, Bigelowiella natans, have experienced similar evolutionary pressures during their transformation to reduced organelles. We compared the evolutionary rates of gene...
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PMID: 16772046
PDF is available here.
PDF is available here.
Biophysical Journal (89)6 2005
Abstract
We show that phototaxis in cryptophytes is likely mediated by a two-rhodopsin-based photosensory mechanism similar to that recently demonstrated in the green alga Chlamydomonas reinhardtii, and for the first time, to our knowledge, report spectroscopic and charge movement properties of cryptophyte a...
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PMID: 16150961
PDF is available here.
PDF is available here.
Abstract
We describe a catalyzed reported deposition-fluorescence in situ hybridization (CARD-FISH) protocol particularly suited to assess the phagotrophy of mixotrophic protists on prokaryotes, since it maintains cell and plastid integrity, avoids cell loss and egestion of prey, and allows visualization of...
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PMID: 16269774
PDF is available here.
PDF is available here.
Abstract
We report a large-scale investigation of gene expression from compacted eukaryotic genomes. We have conducted EST surveys of the microsporidian Antonospora locustae and nucleomorphs of the cryptomonad Guillardia theta and the chlorarachniophyte Bigelowiella natans. In all three systems we find a hig...
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PMID: 16037215
PDF is available here.
PDF is available here.
Abstract
We intended to identify species-specific differences in the metabolic features of these ciliates. Carbon- and cell-specific concentrations of fatty acids and essential amino acids were investigated for the ciliates Balanion planctonicum and Urotricha farcta grown on the cryptomonad Cryptomonas phase...
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PMID: 16329958
PDF is available here.
PDF is available here.
Microbial Ecology (50)2 2005
Abstract
Partitioning of CO(2) incorporation into oxygenic phototrophic, anoxygenic phototrophic, and chemolithoautotrophic guilds was determined in a freshwater lake (Lake Cisó, Banyoles, Spain). CO(2) incorporation into the different types of microorganisms was studied at different depths, during diel cyc...
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PMID: 16184336
PDF is available here.
PDF is available here.
Abstract
We verify the processing of all predicted intron-harboring tRNAs and demonstrate the splicing of the smallest introns (3 nt) investigated so far. However, the spliced intervening sequences are in some cases shifted in respect to the predicted ones. Moreover, we show that introns, if inserted into th...
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PMID: 15872156
PDF is available here.
PDF is available here.
Abstract
We provide the first SSU rDNA and beta-tubulin molecular sequence data for two katablepharids: Katablepharis japonica sp. nov. and Leucocryptos marina. We reveal that the katablepharids are not closely related to the Alveolata; rather, phylogenetic reconstruction analyses of SSU rDNA and beta-tubuli...
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PMID: 16171184
PDF is available here.
PDF is available here.
Parassitologia (47)2 2005
Abstract
I present evidence of the anomalous shape and substructure of the mitochondrion organelle in C. parvum and C. hominis, which is closer to the Guillardia theta nucleomorph structure rather than to the canonical mitochondrion of the proximate apicomplexan T gondii. The atypical architecture is accompl...
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PMID: 16252476
PDF is available here.
PDF is available here.
FEBS Letters (579)5 2005
Abstract
We analyzed one of the components, SufD, in the cryptophyte Guillardia theta and in Arabidopsis thaliana. We demonstrated that SufD fulfils house keeping functions during embryogenesis and in adult plants in A. thaliana....
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PMID: 15710401
PDF is available here.
PDF is available here.
Abstract
In this study, evidence for at least three independent losses of photosynthesis in the freshwater cryptophyte genus Cryptomonas is presented. The phylogeny of the genus was inferred by molecular phylogenetic analyses of the nuclear internal transcribed spacer 2 (nuclear ITS2), partial nuclear large...
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PMID: 15785847
PDF is available here.
PDF is available here.
Nucleic Acids Research (33)14 2005
Abstract
We sequenced the complete mitochondrial DNA of Rhodomonas salina. The 48 063 bp circular-mapping molecule codes for 2 rRNAs, 27 tRNAs and 40 proteins including 23 components of oxidative phosphorylation, 15 ribosomal proteins and two subunits of tat translocase. One potential protein (ORF161) is wit...
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PMID: 16085754
PDF is available here.
PDF is available here.
Methods in Enzymology (395) 2005
Abstract
We also present research aimed at handling the full range of whole-genome data....
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PMID: 15865990
PDF is available here.
PDF is available here.
Marine Biotechnology (7)2 2005
Abstract
We have previously reported that they probably acquire plastids from cryptophytes in the environment, after which they bloom. Thus monitoring the intracellular plastid density in Dinophysis and the source cryptophytes occurring in the field should allow prediction of Dinophysis blooming. In this stu...
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PMID: 15776310
PDF is available here.
PDF is available here.
Abstract
Largely congruent branching patterns and accelerated evolutionary rates were found in nucleomorph SSU rDNA and rbcL genes in a clade that consisted of photosynthetic and colorless species suggesting a coevolution of the two genomes. The extremely accelerated rates in the rbcL phylogeny correlated wi...
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PMID: 16232313
PDF is available here.
PDF is available here.
Abstract
A global phylogeny of major eukaryotic lineages is a significant and ongoing challenge to molecular phylogenetics. Currently, there are five hypothesized major lineages or 'supergroups' of eukaryotes. One of these, the chromalveolates, represents a large fraction of protist and algal diversity. The...
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PMID: 15653923
PDF is available here.
PDF is available here.
Current Biology (14)24 2004
Abstract
Diatom algae arose by two-step endosymbiosis. The complete genome of the diatom Thalassiosira pseudonana has now been sequenced, allowing us to reconstruct the remarkable intracellular gene transfers that occurred during this convoluted cellular evolution.
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PMID: 15620637
PDF is available here.
PDF is available here.
Journal of Molecular Biology (344)1 2004
Abstract
Cryptophyte algae differ from cyanobacteria and red algae in the architecture of their photosynthetic light harvesting systems, even though all three are evolutionarily related. Central to cryptophyte light harvesting is the soluble antenna protein phycoerythrin 545 (PE545). The ultrahigh resolution...
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PMID: 15504407
PDF is available here.
PDF is available here.
Abstract
Some species of the dinoflagellate genus Dinophysis form red tides and are toxin producers with a great environmental impact. The dinoflagellates as a group display high plastid diversity. Several cases indicate that plastids have been replaced. In the case of the genus Dinophysis, the plastids show...
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PMID: 15344936
PDF is available here.
PDF is available here.
Abstract
We first reported here that the harmful alga Cochlodinium polykrikoides, which had been previously known as an autotrophic dinoflagellate, was a mixotrophic species. We investigated the kinds of prey species and the effects of the prey concentration on the growth and ingestion rates of C. polykrikoi...
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PMID: 15537091
PDF is available here.
PDF is available here.
Microbial Ecology (47)1 2004
Abstract
The dinoflagellate Pfiesteria piscicida coexists with bacteria in aquatic environments and as such, may interact with them at the physiological level. This study was designed to investigate the influence of bacteria, present in a clonal culture of Pfiesteria piscicida, on the predator/prey relations...
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PMID: 15259269
PDF is available here.
PDF is available here.
Abstract
Seventy-three strains of cryptophytes assigned to the genera Cryptomonas, Campylomonas or Chilomonas were studied by light microscopy, spectrophotometry and whole-mount electron microscopy. Twelve groups of strains were distinguished by light and whole mount electron microscopy using a combination o...
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PMID: 14658496
PDF is available here.
PDF is available here.