Component of the chaperonin-containing T-complex (TRiC), a molecular chaperone complex that assists the folding of proteins upon ATP hydrolysis. As part of the TRiC complex may play a role in the assembly of BBSome, a complex involved in ciliogenesis regulating transports vesicles to the cilia (PubMed:20080638). Involved in adipogenic differentiation (PubMed:19190184). Component of the chaperonin-containing T-complex (TRiC), a heterooligomeric complex of about 850 to 900 kDa that forms two stacked rings, 12 to 16 nm in diameter (PubMed:20080638). Interacts with MKKS (PubMed:26900326). Located within the basal body of the primary cilium of differentiating preadipocytes. The disease is caused by variants affecting the gene represented in this entry. Adipocytes derived from BBS-patients' dermal fibroblasts in culture exhibit higher propensity for fat accumulation when compared to controls. This strongly suggests that a peripheral primary dysfunction of adipogenesis participates in the pathogenesis of obesity in BBS. Belongs to the TCP-1 chaperonin family. BBS12 subfamily. Truncated N-terminus.