May be involved in the export of mRNA from the nucleus to the cytoplasm (PubMed:11780633). In the ovaries, forms a complex with nxf2, piwi and Nxt1 which acts as effectors of cotranscriptional transposon silencing (PubMed:31219034, PubMed:31368590, PubMed:31570835, PubMed:31384064). On recruitment to a target transcript, interacts with single stranded RNA, thereby anchoring the complex via the nascent target transcript to chromatin and allowing Panx to recruit silencing effectors to establishing repressive heterochromatin at transposon loci (PubMed:31368590, PubMed:31570835, PubMed:31384064). Does not affect piRNA biogenesis (PubMed:31384064). The interaction with Panx stabilizes the nuclear protein complex (PubMed:31384064). Does not bind nucleoporins, but regulates sbr/Nxf1 binding to nucleoporins and, indirectly, transposon exports (PubMed:31570835, PubMed:31384064). In the ovaries, part of a complex composed of at least Panx, nxf2, piwi and Nxt1 (PubMed:31570835, PubMed:31219034, PubMed:31368590, PubMed:31384064). The complex is knowns as Panx-induced cotranscriptional silencing (PICTS) complex, Panx-nxf2-dependent TAP/p15 silencing (Pandas complex), SFiNX (silencing factor interacting nuclear export variant) or piwi-Panx-nxf2-p15 (PPNP) complex (PubMed:31570835, PubMed:31219034, PubMed:31368590, PubMed:31384064). Interacts (via TAP-C domain) with Panx (via NIR region); the interaction is direct (PubMed:31570835, PubMed:31219034, PubMed:31368590). Interacts (via NTF2 domain) with Nxt1; the interaction is direct and prevents Nxt1 binding to nucleoporins (PubMed:31368590). Interacts with sbr/Nxf1 (PubMed:31570835). Localized in both the nucleoplasm and the cytoplasm (PubMed:11780633). Not detected at the nuclear rim (PubMed:11780633). Nuclear localization depends on interaction with Panx (PubMed:31219034, PubMed:31384064). Expressed in female gonads (at protein level) (PubMed:31219034, PubMed:31570835, PubMed:31368590, PubMed:31384064). Expressed ubiquitously (PubMed:11780633). Expressed throughout embryonic development. The RNA-binding domain is a non-canonical RNP-type domain. The TAP-C domain (also known as UBA domain) mediates the interaction with Panx. Results in sterility where fewer eggs are laid and none reach larval stage (PubMed:31219034, PubMed:31384064). Increases transposon expression (PubMed:31219034, PubMed:31384064). RNAi-mediated knockdown in the germline does not affect ovary morphology but results in severe fertility defects where eggs are laied but do not hatch (PubMed:31368590). RNAi-mediated knockdown in the germline increases transposon expression and impairs Panx localization in nurse cells by reducing its stability (PubMed:31219034, PubMed:31570835, PubMed:31368590, PubMed:31384064). Belongs to the NXF family.