Project description:Photosynthetic organisms harvest light for energy. Some eukaryotic algae have specialized in harvesting far-red light by tuning chlorophyll a absorption through a mechanism still to be elucidated. Here, we combined optically detected magnetic resonance and pulsed electron paramagnetic resonance measurements on red-adapted light-harvesting complexes, rVCP, isolated from the freshwater eustigmatophyte alga Trachydiscus minutus to identify the location of the pigments responsible for this remarkable adaptation. The pigments have been found to belong to an excitonic cluster of chlorophylls a at the core of the complex, close to the central carotenoids in L1/L2 sites. A pair of structural features of the Chl a403/a603 binding site, namely the histidine-to-asparagine substitution in the magnesium-ligation residue and the small size of the amino acid at the i-4 position, resulting in a [A/G]xxxN motif, are proposed to be the origin of this trait. Phylogenetic analysis of various eukaryotic red antennae identified several potential LHCs that could share this tuning mechanism.
2024-10-04 | MSV000096023 | MassIVE
Project description:Phylogenetic position of Nesodexia
Project description:We combined new data with previously published data (PMID: 25877615, 26811443, 29379068, 18292342, 24297229, 27302840, 24395773 and 30846778) to compare phylogenetic relationships of the Ami and Yami aborigenes of Taiwan to groups from mainland Southeast Asia, island Southeast Asia and Oceania.
2021-08-23 | GSE152194 | GEO
Project description:Phylogenetic position of Clinterocera nigra (Scarabaeidae, Coleoptera)
