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Involvement of melanocortin receptor accessory proteins (MRAPs) in the function of melanocortin receptors

AuthorsCerdá-Reverter, José Miguel ; Agulleiro Gozalbo, Maria Josep ; Cortés, Raúl ; Sánchez, Elisa ; Guillot, Raúl ; Leal, Esther ; Fernández-Durán, Begoña ; Puchol, Sara; Eley, M.
Issue Date2012
PublisherAcademic Press
CitationGeneral and Comparative Endocrinology 188(1): 133-136 (2012)
AbstractThe melanocortin system integrates different agonists, competitive or inverse agonists, and receptors. Recent investigations have also discovered a specific system of melanocortin receptor accessory proteins (MRAPs) that are involved in the regulation of the functional expression of these receptors. MRAP1 mutations are responsible for type 2 familial glucocorticoid deficiency (FGD2), a rare autosomal disorder characterized by high plasma adrenocorticotropin hormone (ACTH) levels but severe cortisol deficiency. ACTH binds melanocortin 2 receptor (MC2R), a G protein-coupled receptor, in the adrenal gland to promote corticosteroid synthesis. In the absence of MRAP1, MC2R cannot translocate from the endoplasmic reticulum to the plasma membrane and ACTH-induced signaling is extinguished. A second MRAP protein, called MRAP2, also modulates MC2R activity. MRAPs also interact with the other melanocortin receptors, adjusting their pharmacological properties. In this paper, we briefly review the MRAP system and its interaction with melanocortin receptors. © 2013 Elsevier Inc.
Identifiersdoi: 10.1016/j.ygcen.2013.01.017
issn: 0016-6480
Appears in Collections:(IATS) Artículos
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