second Tudor domain found in Tudor domain-containing protein 1 (TDRD1) and similar proteins
TDRD1, also called cancer/testis antigen 41.1 (CT41.1), plays a central role during spermatogenesis by participating in the repression transposable elements and preventing their mobilization, which is essential for germline integrity. It 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 governs the methylation and subsequent repression of transposons. TDRD1 contains four Tudor domains. This model corresponds to the second one. The Tudor domain binds to proteins with dimethylated arginine or lysine residues, and may also bind methylated histone tails to facilitate protein-protein interactions.