– ADGRG1 (Adhesion G Protein-Coupled Receptor G1, also known as GPR56) is a Protein Coding gene. GPR56 is a member of an adhesion G protein-coupled receptor family with a very long N-terminal stalk and seven transmembrane domains. The encoded protein binds specifically to transglutaminase 2, a component of tissue and tumor stroma implicated as an inhibitor of tumor progression. GPR56 may be a target for the treatment of type 2 diabetes. GPR56 inhibits melanoma metastatic growth by impeding the expansion of micrometastases to macrometastases. GPR56 loss of function promotes mesenchymal differentiation and radioresistance of glioma initiating cells both in vitro and in vivo. Diseases associated with ADGRG1 include Polymicrogyria, Bilateral Frontoparietal, and Polymicrogyria, Bilateral Perisylvian, Autosomal Recessive.