This family of proteins interacts with cannabinoid receptor 1 (CNR1) and attenuates CNR1-mediated tonic inhibition of voltage-gated calcium channels [1].

1: CB1 cannabinoid receptor activity is modulated by the cannabinoid receptor interacting protein CRIP 1a. Niehaus JL, Liu Y, Wallis KT, Egertova M, Bhartur SG, Mukhopadhyay S, Shi S, He H, Selley DE, Howlett AC, Elphick MR, Lewis DL; Mol Pharmacol. 2007;72:1557-1566. PMID:17895407