Intracellular signaling and metabolic regulators

Intracellular signaling and metabolic regulators represent a vast and heterogeneous group of proteins responsible for maintaining cellular homeostasis and responding to external stimuli. This classification includes enzymes involved in core metabolic pathways, such as glycolysis and lipid synthesis, as well as signaling molecules like kinases and phosphatases that relay messages from the cell surface to the nucleus (IUPHAR/BPS Guide to Pharmacology). Key examples within this group include the energy-sensing adenosine monophosphate-activated protein kinase (AMPK) and the growth-regulating mammalian target of rapamycin (mTOR) (UniProt: P54646, P42345). Because these regulators sit at the crossroads of vital cellular processes, their dysfunction is linked to a wide range of pathologies, including type 2 diabetes, obesity, and various cancers (PubMed: 22500631). Therapeutic strategies targeting these molecules often involve small-molecule inhibitors or activators designed to fine-tune specific pathways. However, due to the central role these regulators play in normal physiology, drug development in this area faces significant challenges regarding specificity and the avoidance of systemic toxicity (NIH: PMC4911668).

Other names

Intracellular signaling proteinsMetabolic regulatorsSignal transduction moleculesIntracellular signaling and metabolic pathways

Modulation of enzymatic activity, competitive or allosteric inhibition of signaling cascades, or activation of metabolic sensors to restore homeostatic balance (StatPearls: NBK557562).