A SUMO-ubiquitin relay recruits proteasomes to chromosome axes to regulate meiotic recombination.
A SUMO-ubiquitin relay recruits proteasomes to chromosome axes to regulate meiotic recombination.
复制标题
Sumo-泛素继电器将蛋白酶体募集到染色体轴以调节减数分裂重组。
DOI:
10.1126/science.aaf6407
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发表时间:
2017-01-27
期刊:
影响因子:
--
通讯作者:
Hunter N
中科院分区:
文献类型:
--
作者:
Rao HB;Qiao H;Bhatt SK;Bailey LR;Tran HD;Bourne SL;Qiu W;Deshpande A;Sharma AN;Beebout CJ;Pezza RJ;Hunter N
Meiosis produces haploid gametes through a succession of chromosomal events, including pairing, synapsis, and recombination. Mechanisms that orchestrate these events remain poorly understood. We found that the SUMO (small ubiquitin-like modifier)–modification and ubiquitin-proteasome systems regulate the major events of meiotic prophase in mouse. Interdependent localization of SUMO, ubiquitin, and proteasomes along chromosome axes was mediated largely by RNF212 and HEI10, two E3 ligases that are also essential for crossover recombination. RNF212-dependent SUMO conjugation effected a checkpointlike process that stalls recombination by rendering the turnover of a subset of recombination factors dependent on HEI10-mediated ubiquitylation. We propose that SUMO conjugation establishes a precondition for designating crossover sites via selective protein stabilization. Thus, meiotic chromosome axes are hubs for regulated proteolysis via SUMO-dependent control of the ubiquitin-proteasome system.
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