摘要
同源染色体联会时形成的联会复合体(Synaptonemal complex,SC)是由减数分裂前期Ⅰ多种蛋白质聚集而成的超级复合结构。生殖细胞特异性的核蛋白C(2)M(Crossover suppressor on 2 of Manheim)在染色体上高度聚集可以诱导SC的形成。本文采用酵母双杂交方法,利用C(2)M的诱饵表达载体筛选果蝇c DNA文库,共发现40个可能与C(2)M相互作用的蛋白,包括多种DNA及组蛋白结合蛋白、ATPase、转录调节因子。从筛选的结果中,选取wech和Psf1基因构建了转基因果蝇,并在生殖细胞中进行了基因沉默,结果显示联会复合体的消失受到延迟。上述结果表明Wech和Psf1蛋白可能与C(2)M形成复合物,共同参与联会复合体的形成或其稳定性的维持。
The synaptonemal complex（SC） is a huge structure which assembles between the homologous chromosomes during meiotic prophase I. Drosophila germ cell-specific nucleoprotein C（2）M clustering at chromosomes can induce SC formation. To further study the molecular function and mechanism of C（2）M in meiosis, we constructed a bait vector for C（2）M and used the yeast two-hybrid system to identify C（2）M interacting proteins. Forty interacting proteins were obtained, including many DNA and histone binding proteins, ATP synthases and transcription factors. Gene silencing assays in Drosophila showed that two genes, wech and Psf1, may delay the disappearance of SC. These results indicate that Wech and Psf1 may form a complex with C（2）M to participate in the formation or stabilization of the SC complex.
出处
《遗传》
CAS
CSCD
北大核心
2015年第11期1160-1166,共7页
Hereditas（Beijing)
基金
SKLRB青年杰俊科研创新主任基金项目资助
