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Minireview: the melanocortin 2 receptor accessory proteins.


ABSTRACT: The melanocortin 2 receptor (MC2R) accessory protein, MRAP, is one of a growing number of G protein-coupled receptor accessory proteins that have been identified in recent years that add control and complexity to G protein-coupled receptor functional expression and signal transduction. MRAP interacts directly with MC2R and is essential for its trafficking from the endoplasmic reticulum to the cell surface, where it acts as the receptor for the pituitary hormone ACTH. In addition, MRAP2, a newly described homolog of MRAP, is also able to support the cell surface expression of MC2R. Although it is clear that MRAP is required for MC2R function, the mechanism of MRAP action is only beginning to be understood. Recent work has started to reveal some of these mechanisms and the MRAP domains involved in MC2R functional expression, and new data have shown a potential role for both MRAP and MRAP2 in the regulation of the other melanocortin receptors.

SUBMITTER: Webb TR 

PROVIDER: S-EPMC5419097 | biostudies-literature | 2010 Mar

REPOSITORIES: biostudies-literature

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Minireview: the melanocortin 2 receptor accessory proteins.

Webb Tom R TR   Clark Adrian J L AJ  

Molecular endocrinology (Baltimore, Md.) 20091023 3


The melanocortin 2 receptor (MC2R) accessory protein, MRAP, is one of a growing number of G protein-coupled receptor accessory proteins that have been identified in recent years that add control and complexity to G protein-coupled receptor functional expression and signal transduction. MRAP interacts directly with MC2R and is essential for its trafficking from the endoplasmic reticulum to the cell surface, where it acts as the receptor for the pituitary hormone ACTH. In addition, MRAP2, a newly  ...[more]

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