The series of molecular signals initiated by an extracellular calcitonin gene-related peptide (CGRP) combining with a calcitonin gene-related peptide receptor on the surface of the target cell. Calcitonin gene-related peptide receptors may form dimers, trimers or tetramers.
Comment:
An example of a protein that could be annotated to this term is CALCRL in human (Q16602) in PMID:10882736.