RNA-binding protein that protects nascent transcripts containing intronic transposable sequences, known as INE-1, from being degraded by DIP1 (PubMed:31730657). Modulates DIP1 activity by repressing its sumoylation levels (PubMed:31730657). This ensures that intronic sequences will be degradated only after splicing (PubMed:31730657). In the ovaries, regulates germline stem cells (GSCs) self-renewal by repressing the expression of the GSC differentiation-promoting factor Rga (PubMed:29887366). Localizes to DIP1-positive nuclear bodies known as satellite bodies. Expressed in ovarian nurse cells (at protein level). Results in a progressing reduction in egg laying accompanied by a decrease in number of germline stem cells (GSCs) (PubMed:29887366). In the ovaries, results in an increase of Rga pre-mRNA (PubMed:29887366). Results in a decrease in the levels and stability of mRNA and INE-1-containing pre-RNA (PubMed:31730657). Might reduce levels of DIP1 sumoylation (PubMed:31730657). RNAi-mediated knockdown in the germline results in loss of GSCs (PubMed:29887366). Truncated N-terminus.