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Journal article

Comparative analysis defines a broader FMRFamide-gated sodium channel family and determinants of neuropeptide sensitivity

Authors : Dandamudi, Mowgli (2023)

FMRFamide and similar neuropeptides are important physiological modulators in most invertebrates, but the molecular basis of FMRFamide activity at its receptors is unknown. We therefore sought to identify the molecular determinants of FMRFamide potency in one of its native targets, the excitatory FMRFamide-gated sodium channel (FaNaC) from gastropod mollusks. Using molecular phylogenetics and electrophysiological measurement of function, we identified a broad FaNaC family t...

Journal article

De novo phytosterol synthesis in animals

Authors : Michellod, Dolma (2023)

Sterols are lipids that regulate multiple processes in eukaryotic cells, and are essential 17 components of cellular membranes. Sterols are currently assumed to be kingdom 18 specific, with phytosterol synthesis restricted to plants while animals are only able to 19 synthesize cholesterol. Here, we challenge this assumption by demonstrating that the 20 marine annelids Olavius and Inanidrilus synthesize the phytosterol sitosterol de novo. 21...

Journal article

Differential Expression of Gluconeogenesis-Related Transcripts in a Freshwater Zooplankton Model Organism Suggests a Role of the Cori Cycle in Hypoxia Tolerance

Authors : Malek, M. C. (2023)

Gluconeogenesis (GNG) is the process of regenerating glucose and NAD+ that allows continuing ATP 31 synthesis by glycolysis during fasting or in hypoxia. Recent data from C. elegans and crustaceans 32 challenged with hypoxia show differential and tissue-specific expression of GNG-specific genes. 33 2. Here we report differential expression of several GNG-specific genes in the head and body of a model 34 organism, Daphnia magna, a plank...