A Comprehensive Mutagenesis Screen of the Adhesion GPCR Latrophilin-1/ADGRL1.

A Comprehensive Mutagenesis Screen of the Adhesion GPCR Latrophilin-1/ADGRL1.
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DOI:
10.1016/j.isci.2018.04.019
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发表时间:
2018-05-25
期刊:
影响因子:
5.8
通讯作者:
Araç D
Araç D
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Nazarko O;Kibrom A;Winkler J;Leon K;Stoveken H;Salzman G;Merdas K;Lu Y;Narkhede P;Tall G;Prömel S;Araç D

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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. Latrophilin-1/3 decreases cAMP levels and increases SRE levels in mammalian cells Mutagenesis of the TM region reveals residues key for adhesion GPCR signaling A cancer-associated mutation exhibits increased basal activity The same cancer mutation abolishes latrophilin function in C. elegans development Molecular Biology; Membrane Architecture; Protein Structure Aspects
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