MC3R is a gene encoding a protein named melanocortin 3 Receptor (MC3R) in humans. Diseases associated with MC3R include Body Mass Index Quantitative Trait Locus 9 and Body Mass Index Quantitative Trait Locus 11. Among its related pathways are G alpha (s) signalling events and Signaling by GPCR. Gene Ontology (GO) annotations related to this gene include G protein-coupled receptor activity and neuropeptide binding. An important paralog of this gene is MC5R.