Figure 1: Membrane lipids biosynthesized by the gut microbiome and their known host signaling functions.

An overview of the diversity of membrane lipids known to be biosynthesized by the gut microbiome, which includes sphingolipids, saccharolipids, plasmalogens, cardiolipins, sterol lipids, phospholipids, sulfonolipids, and prenol lipids. Representative structures of each lipid are shown in the inner ring (beige) and putative host functions for each lipids are in the outer ring (blue). Functions with little experimental evidence are shown in a faded blue color in the outer ring.