Figure 3. Metabolically-sensitive protein modifications can participate in cellular nutrient sensing.
Production of acetyl-CoA for acetylation is regulated by ATP-citrate lyase (ACL), in a manner dependent on the availability of mitochondria-derived citrate. Both N-linked glycosylation and O-GlcNAcylation of proteins relies on production of UDP-GlcNAc by the hexosamine biosynthetic pathway.