RNA-binding protein involved in gametogenesis in both males and females (PubMed:12296827). Acts by binding to the 3'-UTR of mRNA, specifically recognizing GUU triplets, and promoting the translation of key transcripts (PubMed:12296827). Establishes oocyte polarity through interaction with Bucky ball (BUC) (Probable). Interacts with Bucky ball (BUC) mRNA to mediate Balbiani body formation and oocyte polarity during early oogenesis (By similarity). Testis and ovary specific. In ovary, it is localized in the cortex of oocytes (PubMed:10330505). At the onset of embryogenesis, maternal product is located at the vegetal pole, before migrating toward blastomeres through cytoplasmic streams as early embryogenesis proceededs (PubMed:10330505). Expressed both maternally and zygotically. Transcripts localizes to the Balbiani body during oogenesis (PubMed:18582455). The DAZ domain is essential for the translation activation activity. Belongs to the RRM DAZ family.