近年来,随着多种特异性核酸酶的开发和应用,基因组编辑技术的高效性和准确性显著提高。该类技术的广泛应用使得基因功能的研究、遗传性疾病的治疗以及农业生物技术的发展等各个领域取得了突破性进展。
TALEN (transcription activator like effectors nuclease)和CRISPR (clustered regμlatory interspersed short palindromic repeat)是两种目前最有效的基因定点敲除新技术。这两种体系中都含有人工重组的核酸内切酶,可以对DNA进行靶向切割,造成DNA双链断裂(DSB),进而引发非同源末端连接(NHEJ)或同源重组(HR)等DSB修复途径。NHEJ修复过程中极易发生碱基的缺失、插入和置换,TALEN和CRISPR就是利用这一特性,实现基因的靶向敲除。
三个拟南芥基因IAA2、SIRT2和SAUR41的功能和作用机理是本实验室的重要研究内容,为了获得功能完全丧失的突变体,以深化先前的研究,我们设计和构建了针对这三个基因的TALEN和CRISPR定点敲除体系。另一方面,在农杆菌介导的拟南芥花序直接转基因技术...
【英文摘要】
In recent years, with the development and application of multiple specific nucleases, the efficiency and accuracy of genome editing technology is significantly improved, and widespread application of this technology should make breakthough in many fields, such as the study of gene function, the therapy of genetic diseases and the development of genetically modified crops and so on.
TALEN (transcription activator like effectors nuclease) and CRISPR (clustered regμlatory interspersed short palindromic rep...