Figure 5. Relative abundance of (a) simple and modular ascarosides and (b) simple and modular glucosides in the endo-metabolome of Cbr-glo-1 mutants relative to wild-type C. briggsae.
n.d., not detected. (c) Model for modular metabolite assembly. CEST proteins (membrane-bound in the LROs, red) mediate attachment of building blocks from diverse metabolic pathways to glucose scaffolds and peroxisomal β-oxidation-derived ascarosides via ester and amide bonds. Some of the resulting modular ascarosides may undergo additional peroxisomal β-oxidation following activation by acs-7 (Dolke et al., 2019).