Acts as a positive regulator of hedgehog signaling and regulates ciliary function. . [Isoform 1]: Functions as a co-chaperone for CCT in the assembly of heterotrimeric G protein complexes, facilitates the assembly of both Gbeta-Ggamma and RGS-Gbeta5 heterodimers. [Isoform 2]: Acts as a negative regulator of heterotrimeric G proteins assembly by trapping the preloaded G beta subunits inside the CCT chaperonin. This is the function of ENSG00000136940 (PDCL, phosducin like).