Agrp
Domain
The presence of a 'disulfide through disulfide knot' structurally defines this protein as a knottin.
Function
Plays a role in weight homeostasis. Involved in the control of feeding behavior through the central melanocortin system. Acts as alpha melanocyte-stimulating hormone antagonist by inhibiting cAMP production mediated by stimulation of melanocortin receptors within the hypothalamus and adrenal gland. Has very low activity with MC5R. Is an inverse agonist for MC3R and MC4R being able to suppress their constitutive activity (By similarity). It promotes MC3R and MC4R endocytosis in an arrestin-dependent manner (By similarity).
Tissue Specificity
Expressed in arcuate nucleus and median eminence, adrenal gland (medulla), hypothalamus, testis, and lung.
Cellular localization
- Secreted
- Golgi apparatus lumen
Alternative names
Agrt, Art, Agrp, Agouti-related protein