摘要
自交不亲和性是一种普遍存在于显花植物中的生殖隔离现象,可以抑制近亲繁殖而促成异交。由S-核酸酶介导的植物配子体自交不亲和机制类型的花柱S决定子基因编码的S-核酸酶进入花粉管,异花授粉下则会被花粉SCF复合体所标记泛素后被26S蛋白酶体分解,从而发生异交亲和;然而自花授粉过程中,自我的花粉SCF复合体不会泛素标记花柱S基因编码的S-RNase,从而拥有活力,分解花粉管中的RNA导致花粉管生长发生障碍,进而蛋白质合成受阻,引起自交不亲和。Cullin1是SCF复合体中的一个基因,在SCF复合体SKPl-Cullin1-Rbx1-F-box的晶体结构当中充当重要角色,该综述将主要介绍并讨论基于S-核酸酶的自交不亲和Cullin1基因的研究进展。
Self-incompatibility is a common reproductive isolation in flowering plants that inhibits inbreeding and promotes outcrossing. Style self-and non-self-S-RNase of plant gametophytic self-incompatibility mechanisms mediated by S-nuclease could enter pollen tube, and then be labeled ubiquitin by pollen SCF complex and decomposed by 26 S proteasome, resulting in cross-compatibility. However, during self-pollination, the self-pollen SCF complex is not ubiquitin-labeled S-RNase encoded by Style S gene, so it has vigor. Decomposition of RNA in pollen tube leads to obstacles in pollen tube growth, and then protein synthesis is blocked, resulting in self-incompatibility. Cullin1 is one gene of the SCF complex, which plays an important role in the crystal structure of the the complex SKPl-Cullin1-Rbx1-F-box. This review mainly introduced and discussed the research progress of self incompatibility Cullin1 gene based on S-nuclease.
引文
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