G-protein coupled receptor family C group 5 member D is aprotein that in humans is encoded by theGPRC5Dgene.[5] GPRC5D is a class C orphan G protein-coupled receptor predominantly expressed inmultiple myeloma cells and hard keratinized tissues, with low expression in normal human tissues, rendering it an appealing target for multiple myeloma cells.[6][7][8]
Structural analysis of the complex between GPRC5D andtalquetamab, a bispecific antibody for the treatment of multiple myeloma, has revealed that GPRC5D exists as a dimer. GPRC5D forms a symmetric dimer via TM4 and TM4/TM5 interactions. The study further demonstrated that only one talquetamab molecule can bind to the dimeric form of GPRC5D. Talquetamab Fab recognizes ECLs and TM3/5/7 of one GPRC5D protomer via six CDRs.[9]
The protein encoded by this gene is a member of the G protein-coupled receptor family; however, the specific function of this gene has not yet been determined.[5]
^Jeong J, Park J, Young Mo G, Shin J, Cho Y (August 2024). "Structural Basis for the Recognition of GPRC5D by Talquetamab, a Bispecific Antibody for Multiple Myeloma".Journal of Molecular Biology.436 (20) 168748.doi:10.1016/j.jmb.2024.168748.PMID39181182.
Bräuner-Osborne H, Jensen AA, Sheppard PO, Brodin B, Krogsgaard-Larsen P, O'Hara P (April 2001). "Cloning and characterization of a human orphan family C G-protein coupled receptor GPRC5D".Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression.1518 (3):237–248.doi:10.1016/s0167-4781(01)00197-x.PMID11311935.