The function of TNRC6B (trinucleotide repeat containing adaptor 6B, ENSG00000100354) is as follows. Plays a role in RNA-mediated gene silencing by both micro- RNAs (miRNAs) and short interfering RNAs (siRNAs) (PubMed:16289642, PubMed:19167051, PubMed:19304925, PubMed:32354837). Required for miRNA- dependent translational repression and siRNA-dependent endonucleolytic cleavage of complementary mRNAs by argonaute family proteins (PubMed:16289642, PubMed:19167051, PubMed:19304925, PubMed:32354837). As scaffolding protein associates with argonaute proteins bound to partially complementary mRNAs and simultaneously can recruit CCR4-NOT and PAN deadenylase complexes (PubMed:21981923). {ECO:0000269|PubMed:16289642, ECO:0000269|PubMed:19167051, ECO:0000269|PubMed:19304925, ECO:0000269|PubMed:21981923, ECO:0000269|PubMed:32354837}.