Adhesion G-protein-coupled receptors (aGPCRs) play critical roles in diverse cellular processes in neurobiology, development, immunity, and numerous diseases. The lack of molecular understanding of their activation mechanisms, especially with regard to the transmembrane domains, hampers further studies to facilitate aGPCR-targeted drug development. Latrophilin-1/ADGRL1 is a model aGPCR that regulates synapse formation and embryogenesis, and its mutations are associated with cancer and attention-deficit/hyperactivity disorder. Here, we established functional assays to monitor latrophilin-1 function and showed the activation of latrophilin-1 by its endogenous agonist peptide. Via a comprehensive mutagenesis screen, we identified transmembrane domain residues essential for latrophilin-1 basal activity and for agonist peptide response. Strikingly, a cancer-associated mutation exhibited increased basal activity and failed to rescue the embryonic developmental phenotype in transgenic worms. These results provide a mechanistic foundation for future aGPCR-targeted drug design.
Submitter: Olha Nazarko
Submission Date: July 9, 2018, 11:55 a.m.
|Number of data points||630|
|Proteins||Adhesion G protein-coupled receptor L1|
|Assays/Quantities/Protocols||Experimental Assay: cAMP assay ; Experimental Assay: Cell Surface Expression ; Experimental Assay: Basal activity (not normalized to expression) ; Experimental Assay: Basal activity (normalized to expression) ; Experimental Assay: Peptide response|
|Libraries||Complete signaling and expression data|