G-protein coupled receptor for glucagon-like peptide 1 (GLP-1) (PubMed:8405712, PubMed:8216285, PubMed:7517895, PubMed:19861722, PubMed:26308095, PubMed:27196125, PubMed:28514449). Ligand binding triggers activation of a signaling cascade that leads to the activation of adenylyl cyclase and increased intracellular cAMP levels (PubMed:8405712, PubMed:8216285, PubMed:7517895, PubMed:19861722, PubMed:26308095, PubMed:27196125, PubMed:28514449). Plays a role in regulating insulin secretion in response to GLP-1 (By similarity). The allosteric modulators NNC0640, PF-06372222 and MK-0893 inhibit the increase of intracellular cAMP levels in response to GLP-1. May form homodimers and heterodimers with GIPR. N-glycosylation enhances cell surface expression and lengthens receptor half-life by preventing degradation in the ER. Belongs to the G-protein coupled receptor 2 family. Glucagon-like peptide 1 entry