Substrate-specific adapter of a BCR (BTB-CUL3-RBX1) E3 ubiquitin ligase complex that regulates degradation of glutamate receptors in neurons. The BCR(kel-8) ubiquitin ligase complex mediates ubiquitination and subsequent degradation of rpy-1. Indirectly regulates the protein turnover of glr-1, possibly via ubiquitination and degradation of rpy-1. Protein modification; protein ubiquitination. Component of the BCR(kel-8) E3 ubiquitin ligase complex, at least composed of cul-3, kel-8 and rbx-1. Interacts with rpy-1. Localizes to postsynaptic clusters. Expressed in neurons.