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UBA domain found in trinucleotide repeat-containing gene 6C protein (TNRC6C) and similar proteins TNRC6C is one of three GW182 paralogs in mammalian genomes. It is enriched in P-bodies and important for efficient miRNA-mediated repression. TNRC6C is composed of an N-terminal glycine/tryptophan (G/W)-rich region containing an Ago hook responsible for Ago protein-binding; a ubiquitin-associated (UBA) domain and a glutamine (Q)-rich region in the middle region; a middle G/W-rich region, a RNA recognition motif (RRM), also called RBD (RNA binding domain) or RNP (ribonucleoprotein domain), and a C-terminal G/W-rich region, at the C-terminus. A bipartite C-terminal region including the middle and C-terminal G/W-rich regions is referred as silencing domain that triggers silencing of bound transcripts by inhibiting protein expression and promoting mRNA decay via deadenylation. The C-terminal half containing the RRM domain functions as a key effector domain mediating protein synthesis repression by TNRC6C. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",