| Autor: |
Yongjuan Guan, Huijuan Lin, N Adrian Leu, Gordon Ruthel, Serge Y Fuchs, Luca Busino, Mengcheng Luo, P Jeremy Wang |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
BASE-Bielefeld Academic Search Engine |
| ISSN: |
1362-4962 |
| Popis: |
Homeostasis of meiotic DNA double strand breaks (DSB) is critical for germline genome integrity and homologous recombination. Here we demonstrate an essential role for SKP1, a constitutive subunit of the SCF (SKP1-Cullin-F-box) ubiquitin E3 ligase, in early meiotic processes. SKP1 restrains accumulation of HORMAD1 and the pre-DSB complex (IHO1-REC114-MEI4) on the chromosome axis in meiotic germ cells. Loss of SKP1 prior to meiosis leads to aberrant localization of DSB repair proteins and a failure in synapsis initiation in meiosis of both males and females. Furthermore, SKP1 is crucial for sister chromatid cohesion during the pre-meiotic S-phase. Mechanistically, FBXO47, a meiosis-specific F-box protein, interacts with SKP1 and HORMAD1 and targets HORMAD1 for polyubiquitination and degradation in HEK293T cells. Our results support a model wherein the SCF ubiquitin E3 ligase prevents hyperactive DSB formation through proteasome-mediated degradation of HORMAD1 and subsequent modulation of the pre-DSB complex during meiosis. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
