Terminal uridylyltransferase 4 (TUT4)

Uridylyltransferase that mediates the terminal uridylation of mRNAs with brief (less than 25 nucleotides) poly(A) tails, hence facilitating international mRNA decay (PubMed:25480299). During 3' terminal uridylation of mRNA, sculpts, with TUT7, the maternal transcriptome by eliminating transcripts during oocyte growth (By similarity).

Involved in microRNA (miRNA)-induced gene silencing through uridylation of deadenylated miRNA targets. Also functions as an integral regulator of microRNA biogenesis using 3 distinct uridylation mechanics (PubMed:25979828).