Abstract
The mouse WD repeat and FYVE domain containing 1 (Wdfy1) gene is located in chromosome 1qC4 and spans over 73.7 kilobases. It encodes a protein of 410-amino acid protein that shares 97.8% amino acid sequence identity with the human WDFY1 protein. However, the expression pattern of WDFY1 in reproductive organs and its function in male fertility remain unknown. In this study, we generated transgenic mice expressing FLAG-Wdfy1-mCherry cDNA driven by the Wdfy1 promoter to clarify the expression of WDFY1. The results showed that WDFY1 is highly expressed in mouse testes and located in the cytoplasm of late pachytene spermatocytes to elongated spermatids. Interestingly, the global Wdfy1 knockout (KO) male mice displayed normal growth, development, and fertility. Further histological analysis of Wdfy1 knockout mouse testes revealed that all spermatogenic cells are present in Wdfy1 KO seminiferous tubules. Together, our data demonstrate that WDFY1 is dispensable for mouse spermatogenesis and male fertility.
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