TDRD7 (Tudor domain containing 7) is an RNA-binding protein component of cytoplasmic RNA granules that regulates post-transcriptional gene expression, particularly in lens and testicular development 1. The protein functions by binding specific mRNAs and modulating their translation, including critical lens proteins like CRYBB3 and HSPB1 [UniProt]. Mechanistically, TDRD7 mediates autophagosome maturation by directly binding to and downregulating Tbc1d20 mRNA, facilitating clearance of damaged proteins and organelles essential for lens transparency and acrosome biogenesis during spermiogenesis 1. Beyond developmental roles, TDRD7 serves as an interferon-stimulated viral restriction factor against herpes simplex virus by inhibiting AMPK, independent of autophagy pathways 2. Loss-of-function TDRD7 mutations cause an autosomal recessive syndrome combining congenital cataracts and nonobstructive azoospermia 3, with plasma TDRD7 mRNA levels significantly reduced in cataract patients compared to controls 4. Additionally, TDRD7 participates in piRNA processing and chr9 body organization during spermatogenesis 5, and elevated TDRD7 expression correlates with poor prognosis in clear cell renal cell carcinoma 6. Common TDRD7 polymorphisms (rs10981985) associate with protection against age-related cortical cataracts in Han Chinese populations 7.