Category Archive: Papers by CGEB labs

Jun 16

Adaptations to High Salt in a Halophilic Protist: Differential Expression and Gene Acquisitions through Duplications and Gene Transfers.

The capacity of halophiles to thrive in extreme hypersaline habitats derives partly from the tight regulation of ion homeostasis, the salt-dependent adjustment of plasma membrane fluidity, and the increased capability to manage oxidative stress. Halophilic bacteria, and archaea have been intensively studied, and substantial research has been conducted on halophilic fungi, and the green alga …

Continue reading »

May 28

A non-photosynthetic diatom reveals early steps of reductive evolution in plastids.

Non-photosynthetic plastids retain important biological functions and are indispensable for cell viability. However, the detailed processes underlying the loss of plastidal functions other than photosynthesis remain to be fully understood. In this study, we used transcriptomics, subcellular localization, and phylogenetic analyses to characterize the biochemical complexity of the non-photosynthetic plastids of the apochlorotic diatom Nitzschia …

Continue reading »

May 24

The New Red Algal Subphylum Proteorhodophytina Comprises the Largest and Most Divergent Plastid Genomes Known.

Red algal plastid genomes are often considered ancestral and evolutionarily stable, and thus more closely resembling the last common ancestral plastid genome of all photosynthetic eukaryotes [1, 2]. However, sampling of red algal diversity is still quite limited (e.g., [2-5]). We aimed to remedy this problem. To this end, we sequenced six new plastid genomes …

Continue reading »

May 13

Lynn Margulis and the endosymbiont hypothesis: 50 years later.

The 1967 article “On the Origin of Mitosing Cells” in the Journal of Theoretical Biology by Lynn Margulis (then Lynn Sagan) is widely regarded as stimulating renewed interest in the long-dormant endosymbiont hypothesis of organelle origins. In her article, not only did Margulis champion an endosymbiotic origin of mitochondria and plastids from bacterial ancestors, but …

Continue reading »

May 07

Organelles that illuminate the origins of Trichomonas hydrogenosomes and Giardia mitosomes.

[unable to retrieve full-text content]

May 05

The Impact of Exclusive Enteral Nutrition (EEN) on the Gut Microbiome in Crohn’s Disease: A Review.

Crohn’s disease (CD), a form of inflammatory bowel disease (IBD), is thought to arise from a complex interaction of genetics, the gut microbiome, and environmental factors, such as diet. There is clear evidence that dietary intervention is successful in the treatment of CD-exclusive enteral nutrition (EEN) is able to induce remission in up to 80% …

Continue reading »

Apr 30

Mitochondrial genome evolution and a novel RNA editing system in deep-branching heteroloboseids.

Discoba (Excavata) is an evolutionarily important group of eukaryotes that includes Jakobida, with the most bacterial-like mitochondrial genomes known, and Euglenozoa, many of which have extensively fragmented mitochondrial genomes. However, little is known about the mitochondrial genomes of Heterolobosea, the third main group of Discoba. Here, we studied two heteroloboseids – an undescribed amoeba ‘BB2’ …

Continue reading »

Mar 26

UniEuk: Time to Speak a Common Language in Protistology!

THE bewildering organismal and functional complexity of microbial eukaryotes has long fascinated protistologists but exceeded the capacity of this research community to comprehensively study it. Lacking the critical mass for a strong scientific discipline, protistologists remain largely divided into various sub-communities (protozoology versus phycology, aquatic versus terrestrial systems, fossil versus extant organisms, etc.), many of …

Continue reading »

Mar 26

How Embryophytic is the Biosynthesis of Phenylpropanoids and their Derivatives in Streptophyte Algae?

The origin of land plants from algae is a long-standing question in evolutionary biology. It is becoming increasingly clear that many characters that were once assumed to be “embryophyte-specific” can in fact be found in their closest algal relatives, the streptophyte algae. One such case is the phenylpropanoid pathway. While biochemical data indicate that streptophyte …

Continue reading »

Mar 22

Revisiting the evolutionary history and roles of protein phosphatases with Kelch-like domains in plants.

Protein phosphatases with Kelch-like domains (PPKL) are members of the phosphoprotein phosphatases family present only in plants and alveolates. PPKL have been described as positive effectors of brassinosteroid (BR) signaling in plants. Most of the evidence supporting this role has been gathered using one of the four homologs in Arabidopsis (Arabidopsis thaliana), brassinosteroid-insensitive1 suppressor (BSU1). …

Continue reading »

Older posts «