Enables piRNA binding activity. Involved in male gamete generation; negative regulation of transposition; and reciprocal meiotic recombination. Acts upstream of or within several processes, including homologous chromosome pairing at meiosis; posttranscriptional regulation of gene expression; and reproductive structure development. Located in cytoplasm and nucleus. Is expressed in several structures, including blastocyst; brain; early embryo; gonad; and tooth. Orthologous to human TEX19 (testis expressed 19). [provided by Alliance of Genome Resources, Apr 2022]