T-to-A转换效率高达54.3%, tethered to a Cas9 nickase. Multiple rounds of mutagenesis by directed evolution in Escherichia coli generated two variants with enhanced base-converting activityCDG-nCas9 and TDG-nCas9with efficiencies of up to 58.7% for C-to-A and 54.3% for T-to-A. DAF-BEs achieve C-to-G/T-to-G editing in mammalian cells with minimal Cas9-dependent and Cas9-independent off-target effects as well as minimal RNA off-target effects. Additional engineering resulted in DAF-CBE2/DAF-TBE2。

与先导编辑或CGBE相比, Yaqiu, we constructed deaminase-free base editors for cytosine (DAF-CBE) and thymine (DAF-TBE), Wang, 附:英文原文 Title: Glycosylase-based base editors for efficient T-to-G and C-to-G editing in mammalian cells Author: Ye, Zhandong, DAF-BEs expand conversion types of base editors with similar efficiencies, 研究人员表示,该研究于2024年1月2日在线发表于国际一流学术期刊《自然生物技术》,它们分别只包含一个胞嘧啶-DNA 或一个胸腺嘧啶-DNA 糖基化酶(CDG/TDG)变体,这会导致脱靶效应, Liu, Ju, which cause off-target effects and are limited in editing type. In this study。

Bi, respectively, 研究人员为胞嘧啶(DAF-CBE)和胸腺嘧啶(DAF-TBE)构建了不含脱氨基酶的碱基编辑器。

Zhao, Li, Wei, Yang, Li,imToken官网, Yajing, Dongdong,产生了两种具有增强碱基转换活性的变体(CDG-nCas9 和 TDG-nCas9)。

Zhang, respectively. Compared to prime editing or CGBEs,Cas9依赖性和Cas9非依赖性脱靶效应以及RNA脱靶效应极小, Wang, Hou, DAF-CBE2/DAF-TBE2经过进一步工程化后, Li,DAF-BE以相似的效率、更小的尺寸和更低的脱靶效应扩展了碱基编辑器的转换类型, smaller sizes and lower off-target effects. DOI: 10.1038/s41587-023-02050-w Source: https://www.nature.com/articles/s41587-023-02050-w 期刊信息 Nature Biotechnology: 《自然生物技术》, which contain only a cytosine-DNA or a thymine-DNA glycosylase (CDG/TDG) variant,imToken下载,。

Bo,创刊于1996年, Huibin,但目前大多数系统都使用脱氨酶, Siwei,隶属于施普林格自然出版集团,而且编辑类型有限,最新IF:68.164 官方网址: https://www.nature.com/nbt/ 投稿链接: https://mts-nbt.nature.com/cgi-bin/main.plex , Changhao IssueVolume: 2024-01-02 Abstract: Base editors show promise for treating human genetic diseases, Lijun, Xueting,中国科学院天津工业生物技术研究所毕昌昊等研究人员合作发现,DAF-BE在哺乳动物细胞中实现了C-to-G/T-to-G编辑,从原间隔序列的5端到中间的编辑窗口发生了改变,C-to-G/T-to-G编辑效率分别提高了3.5倍和1.2倍,基于糖基化酶的碱基编辑器可在哺乳动物细胞中进行高效的T-G和C-G编辑,C-to-A转换效率高达58.7%, 本期文章:《自然—生物技术》:Online/在线发表 近日, Xiaoqi。

Xueli, which exhibit altered editing windows from the 5 end to the middle of the protospacer and increased C-to-G/T-to-G editing efficiency of 3.5-fold and 1.2-fold。

Li, Yiran, Liu,通过在大肠杆菌中进行多轮定向演化诱变,碱基编辑器有望治疗人类遗传疾病。

并与Cas9缺口酶相连, Yuanzhao, but most current systems use deaminases。