Wdr70-flox Mouse

Wdr70, without common aliases mentioned in the references, is significantly involved in maintaining genomic stability. It is associated with pathways related to histone modification, DNA repair, and cell cycle regulation. Its biological importance lies in ensuring chromatin homeostasis and genetic stability, making it a crucial gene for understanding cellular processes [1,2,3,4,5,6]. Genetic models, such as fission yeast and human cell lines, have been valuable in studying its functions.

In fission yeast, depletion of the Wdr70 gene leads to cell cycle delay, hypersensitivity to DNA damage reagents, and quick phenotypic changes. It has a strong genetic interaction with genes regulating checkpoint and homologous recombination (HR), pinpointing its function to DNA end resection. The function of Wdr70 is attributed to monoubiquitination of histone H2B (uH2B) near DNA double strand breaks (DSBs) [1].

In human cells, studies show that Wdr70 promotes H2BK120ub1 by interacting with the RNF20/40 complex, and is involved in POLE3-mediated DNA double-strand breaks repair. Wdr70 also controls the expression of DNA damage response (DDR) factors like BRCA1, BRCA2, and RAD51. Loss of Wdr70 disrupts homologous recombination and chromosomal stability, as seen in ovarian cancer studies where its mutations lead to DNA repair defects [2,4,5,6].

In conclusion, Wdr70 is essential for chromatin modulation, DNA repair, and maintaining genomic stability. Studies using model systems like fission yeast and human cell lines have revealed its role in processes related to cell cycle and DNA damage response, with implications for understanding diseases such as ovarian cancer where Wdr70 mutations can lead to genomic instability [1,2,4,5,6].