Journal
FRONTIERS IN PLANT SCIENCE
Volume 12, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2021.629045
Keywords
laminarin; glycogen; stramenopila; metabolism; CAZy; polysaccharide
Categories
Funding
- CNRS
- Universite de Lille
- ANR grant Expendo [ANR-14-CE11-0024]
- ANR grant MathTest [ANR-18-CE130027]
- European Regional Development Fund Alibiotech
- Agence Nationale de la Recherche (ANR) [ANR-14-CE11-0024] Funding Source: Agence Nationale de la Recherche (ANR)
Ask authors/readers for more resources
Eukaryotes typically synthesize storage polysaccharides in the cytosol or vacuoles in the form of alpha or beta-glucan linked polymers, which have different impacts on osmotic pressure, glucose accessibility, and storage amounts. Glycogen or starch accumulation is widespread among eukaryotes, while other lineages show a more complex picture featuring both alpha and beta-glucan accumulators.
Eukaryotes most often synthesize storage polysaccharides in the cytosol or vacuoles in the form of either alpha (glycogen/starch)- or beta-glucosidic (chrysolaminarins and paramylon) linked glucan polymers. In both cases, the glucose can be packed either in water-soluble (glycogen and chrysolaminarins) or solid crystalline (starch and paramylon) forms with different impacts, respectively, on the osmotic pressure, the glucose accessibility, and the amounts stored. Glycogen or starch accumulation appears universal in all free-living unikonts (metazoa, fungi, amoebozoa, etc.), as well as Archaeplastida and alveolata, while other lineages offer a more complex picture featuring both alpha- and beta-glucan accumulators. We now infer the distribution of these polymers in stramenopiles through the bioinformatic detection of their suspected metabolic pathways. Detailed phylogenetic analysis of key enzymes of these pathways correlated to the phylogeny of Stramenopila enables us to retrace the evolution of storage polysaccharide metabolism in this diverse group of organisms. The possible ancestral nature of glycogen metabolism in eukaryotes and the underlying source of its replacement by beta-glucans are discussed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available