RAMPs regulate the transport and ligand specificity of the calcitonin-receptor-like receptor.
basic_science · Level V
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Abstract
Calcitonin-gene-related peptide (CGRP) and adrenomedullin are related peptides with distinct pharmacological profiles. Here we show that a receptor with seven transmembrane domains, the calcitonin-receptor-like receptor (CRLR), can function as either a CGRP receptor or an adrenomedullin receptor, depending on which members of a new family of single-transmembrane-domain proteins, which we have called receptor-activity-modifying proteins or RAMPs, are expressed. RAMPs are required to transport CRLR to the plasma membrane. RAMP1 presents the receptor at the cell surface as a mature glycoprotein and a CGRP receptor. RAMP2-transported receptors are core-glycosylated and are adrenomedullin receptors.
Medical subject headings
- Calcitonin Gene-Related Peptide
- Membrane Proteins
- Peptides
- Receptors, Calcitonin
- Receptors, Calcitonin Gene-Related Peptide
- Receptors, Peptide