Melanocortin 2 receptor accessory protein 2 is a protein that in humans is encoded by the MRAP2 gene.[1] MRAP2 interacts directly with melanocortin 4 receptor (MCR4).
Knockout of the Mrap2 gene in mice leads to severe obesity. In addition, a rare mutation of the MRAP2 gene in humans leads to severe, early-onset obesity.[2]
Hofland J, Delhanty PJ, Steenbergen J, Hofland LJ, van Koetsveld PM, van Nederveen FH, de Herder WW, Feelders RA, de Jong FH (May 2012). "Melanocortin 2 receptor-associated protein (MRAP) and MRAP2 in human adrenocortical tissues: regulation of expression and association with ACTH responsiveness". J. Clin. Endocrinol. Metab. 97 (5): E747–54. doi:10.1210/jc.2011-2328. PMID22419722.
Metherell LA, Chapple JP, Cooray S, David A, Becker C, Rüschendorf F, Naville D, Begeot M, Khoo B, Nürnberg P, Huebner A, Cheetham ME, Clark AJ (February 2005). "Mutations in MRAP, encoding a new interacting partner of the ACTH receptor, cause familial glucocorticoid deficiency type 2". Nat. Genet. 37 (2): 166–70. doi:10.1038/ng1501. PMID15654338.