TEX14 (testis expressed 14) is a germ cell-specific protein essential for male fertility through its dual roles in intercellular bridge formation and kinetochore function during spermatogenesis. The protein contains ankyrin repeats, an inactive protein kinase domain, and a leucine zipper motif, and is preferentially expressed during meiosis in pachytene and diplotene spermatocytes 1. TEX14's primary function involves converting midbodies into stable intercellular bridges by competitively binding to CEP55 via its AxGPPx3YxPP motif, thereby preventing CEP55's interaction with ALIX and TSG101 and blocking cell abscission 2. These intercellular bridges are evolutionarily conserved structures that enable cytoplasmic exchange between connected germ cells and are critical for meiotic progression 34. Loss of TEX14 function causes severe spermatogenic defects including meiotic arrest at the pachytene stage, failure of DNA replication and synapsis, defective double-strand break repair, and retrotransposon derepression 4. Clinically, TEX14 deficiency results in spermatogenic failure and non-obstructive azoospermia in both mouse models and human patients 5. Compound heterozygous mutations in TEX14 have been identified as recurrent genetic causes of male infertility 65, highlighting its critical role in human reproductive health.