
微同源末端连接MMEJ简介 - 知乎
Takashi Yamamoto实验室利用MMEJ创建了CRISPR基因敲入的新方法,命名为PITCh (精确整合到目标染色体中)。 利用它们的PITCh质粒,可以在大约一个半月的时间内创建GFP敲入细胞系,而不需要进行复杂的同源臂克隆。 DNA双链断裂后的修复方法主要有3种。 HDR从具有两侧序列同源性的修复模板中复制该序列,用于精确的DSB修复。 NHEJ以易错的方式连接DSB的末端,常见的有插入和删除。 相比之下,MMEJ利用DNA双链断裂 (DSB)两侧5-25bp的区域进行DNA …
Microhomology-mediated end joining - Wikipedia
Microhomology-mediated end joining (MMEJ), also known as alternative nonhomologous end-joining (Alt-NHEJ) is one of the pathways for repairing double-strand breaks in DNA.
Microhomology-mediated end joining: new players join the team
2017年1月13日 · MMEJ is an error-prone repair mechanism for DSBs, which relies on exposed microhomologous sequence flanking broken junction to fix DSBs in a Ku- and ligase IV-independent manner. Recently, significant progress has been made in MMEJ mechanism study.
Nature发表基于选择性非同源末端连接修复的基因治疗方法
2019年4月4日 · NHEJ通路是大多数细胞中占主导地位的DSB修复通路。 MMEJ通路通过末端切除来发现断裂两侧的微小同源序列,这些同源序列可用于模板化断裂端融合。 PARP-1可通过MMEJ通路调控DSB修复。 用PARP-1抑制剂rucaparib治疗细胞可降低DSB在MMEJ修复通路中的 …
Microhomology-assisted scarless genome editing in human iPSCs
2018年3月5日 · Here, we present a method for scarless selection marker excision using engineered microhomology-mediated end joining (MMEJ). By overlapping the homology arms of standard donor vectors, short...
Microhomology-mediated End Joining and Homologous …
2013年4月22日 · In this study, we demonstrated that, distinct from Ku-dependent classical nonhomologous end joining, MMEJ—even with very limited end resection—requires cyclin-dependent kinase activities and increases significantly when cells enter S phase.
Robust activation of microhomology-mediated end joining for …
2018年9月12日 · In this study, we propose Microhomology-mediated End Joining (MMEJ) as a viable solution for improving somatic sequence homogeneity in vivo, capable of generating a single predictable allele at high rates (56% ~ 86% of the entire mutant allele pool).
Microhomology-mediated end joining: Good, bad and ugly - PMC
Dissecting the mechanisms of MMEJ is of great interest because of its potential to destabilize the genome through gene deletions and chromosomal rearrangements in cells deficient in canonical repair pathways, including HR and C-NHEJ. In addition, evidence now suggests that MMEJ plays a physiological role in normal cells.
MMEJ介导的基因编辑--大幅增加基因编辑效率 - 简书
2019年4月4日 · 横向比较: CRISPR-Cas9基因标记使用的方法有(1)同源修复HR,(2)非同源end-joining NHEJ,(3)微同源介导的end-joining MMEJ。 虽然HR的方法可以非常精准的knockin,但它的载体的构建和效率远低于end-joining的方法。
基因编辑新工具:MMEJ-KO!刘耀光院士团队开发基因编辑删除 …
刘耀光院士团队前期对存在基因组片段删除的水稻基因编辑植株进行分析,发现基于 微同源介导的末端连接 (microhomology-mediated end joining, MMEJ)的修复方式,能更有效地促进基因组片段的删除(Zeng 等, 2020; doi.org/10.1111/pbi.133)。
- 某些结果已被删除