Piwi-like protein 4 (PIWIL4) plays a central role during spermatogenesis by repressing transposable elements and preventing their mobilization, which is essential for the germline integrity. PIWIL4 acts via the piRNA metabolic process, which mediates the repression of transposable elements during meiosis by forming comple, Xenopus/Amphibian,es composed of piRNAs and Piwi proteins and governs the methylation and subsequent repression of transposons. PIWIL4 directly binds piRNAs, a class of 24 to 30 nucleotide RNAs that are generated by a Dicer-independent mechanism and are primarily derived from transposons and other repeated sequence elements.