CCT6B (chaperonin containing TCP1 subunit 6B) functions as a tissue-specific component of the chaperonin-containing T-complex (TRiC), a molecular chaperone complex that facilitates protein folding through ATP hydrolysis 1. The protein is primarily expressed in testicular tissues and assists in folding actin, tubulin, and other cellular proteins 1. Regarding disease relevance, CCT6B has emerged as a significant player in cancer biology. In hepatocellular carcinoma, CCT6B is significantly overexpressed and promotes tumor cell proliferation through cell cycle regulation, while also contributing to M2 macrophage infiltration via CCL20 signaling; higher expression correlates with poor patient prognosis 2. CCT6B was also identified as recurrently mutated in Burkitt lymphoma 3. Additionally, CCT6B shows elevated expression in laryngeal carcinoma tissues 4 and non-seminomatous testicular germ cell tumors, where it associates with increased tumor invasiveness 5. Clinically, while CCT6B mutations were identified in non-obstructive azoospermia cases, knockout studies demonstrated the gene is dispensable for normal spermatogenesis and male fertility 6. In infertility contexts, CCT6B undergoes downregulation in varicocele-associated sperm dysfunction 7. In joint contracture, CCT6B suppression promotes fibrosis, suggesting overexpression as a potential therapeutic target to inhibit fibroblast activation 8.