Endoribonuclease that plays a central role during spermatogenesis by repressing transposable elements and preventing their mobilization, which is essential for the germline integrity. Plays an essential role in meiotic differentiation of spermatocytes, germ cell differentiation and in self-renewal of spermatogonial stem cells. Acts via the piRNA metabolic process, which mediates the repression of transposable elements during meiosis by forming complexes composed of piRNAs and Piwi proteins and govern the methylation and subsequent repression of transposons. During piRNA biosynthesis, plays a key role in the piRNA amplification loop, also named ping-pong amplification cycle, by acting as a 'slicer-competent' piRNA endoribonuclease that cleaves primary piRNAs, which are then loaded onto 'slicer-incompetent' piwil4. Piwil2 slicing produces a pre-miRNA intermediate, which is then processed in mature piRNAs, and as well as a 16 nucleotide by-product that is degraded. Required for piwil4/miwi2 nuclear localization and association with secondary piRNAs antisense. Represses circadian rhythms by promoting the stability and activity of core clock components ARNTL/BMAL1 and CLOCK (By similarity).

Belongs to the argonaute family. Piwi subfamily.

949 amino acids

MDPTRPPFRGSPFHTPLGVRPPVLETKEEGPHGRAVLLPRGRALLGASAPSSDTTQRDPSDSRNVLPALFRGMGIETKPSGIPGRGGPVFGRGFLSTMSSGDGPDQPLSEPSIRPSLSTRVQQASDFSTERVALGRARFPIPPVSMEKPHVPTGRGLLFPSVLPTLTSDPVPKESPIATLQIEKEEKWEPLPKKGSKGSPCQLGLNLIKINFQNEAVYQYHVTFTPIVECRSMRFGMMKDHRSVTGPVTAFDGSILYLPVKLAQTVELESERRTDGQKIKITIQMTKILDPSSDLCLPFYNVVMRRVFKILDLKLVGRNFYDPASSTVLQQYRLQVWPGYAANIRKTDGGLFLLVDITHKIIRSDSVLDIMNILYQQSPENFQDEVTKQLVGSIVITRYNNRTYRIDDIEWNMSPKDSFSMSDGSKISFIDYYSKNYGITVKELDQPLLLHRPSERKAPKGKALDIVLLLPELAFMTGIPEKMRKDFRAMKDLTQQIHLSPKQHHISLGKLLKRIESSADAKNELQRWGLFLDTDIHMTTGRILPIEKINLRNNSFPAGEDLNWNREVTREACRSSVHLLYWAMIYPKRASAQAQELSSMLERIGGPIGIRVNHPNCVELRDDRVETYARSIKSLLEGEGKVQLLVCLISGTRDDLYGAIKKLCCVQNPVPSQVINTRTISQPQKLRSIAQKILLQINCKLGGELWGVDIPLKSVMVIGMDVYHDPSRGMRSVLGFVASINSCLTAWYSRVVFQLPNQEIMDSLKLCLVAALQKFFEVNHSLPEKIVVYRDGVSDGQLNTVENYEIPQLQTCFQTFDNYNPRMVVIVVQKRVSTNLYSTATGQFLTPQPGTVIDHTVTNRKWIDFFLMSHHVRQGCGIPTHYICVMNTANLGPDHLQRLTFKLCHMYWNWPGTIRVPAPCKYAHKLAFLSGQFLHHEPSIKLCDKLFFL

107 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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