The Double Nickase Plasmid features a U6 promoter for sgRNA expression, a 20 nt targeting sequence, and a gRNA scaffold to guide Cas9n. It includes a CBh promoter for Cas9n (D10A) and puromycin resistance, GFP for transfection verification, and nuclear localization signals (NLS). The 2A peptide allows co-expression of Cas9n and Puro from a single promoter, enabling precise genome editing with reduced off-target effects.
The Double Nickase Plasmid features a U6 promoter for sgRNA expression, a 20 nt targeting sequence, and a gRNA scaffold to guide Cas9n. It includes a CBh promoter for Cas9n (D10A) and puromycin resistance, GFP for transfection verification, and nuclear localization signals (NLS). The 2A peptide allows co-expression of Cas9n and Puro from a single promoter, enabling precise genome editing with reduced off-target effects.
Cas9n Nickase gRNA Plasmid Targeting: Dual gRNA plasmids create single-strand nicks at precise DNA sequences for efficient genome editing using Cas9n Nickase.
This image illustrates the Cas9n Nickase mechanism used for precise genome editing. Two plasmids (Plasmid 1 and Plasmid 2) are shown, each containing a targeted DNA sequence. The system utilizes single-guide RNAs (sgRNA) to direct Cas9n Nickase to specific genomic locations, represented by the blue and pink DNA strands. The sgRNA scaffold aids in guiding Cas9n to the 20 nucleotide (nt) target sequence on the DNA. Cas9n makes single-strand cuts at NCC and NGG sites, enabling precise gene modifications without creating double-strand breaks.
The Double Nickase Plasmid features a U6 promoter for sgRNA expression, a 20 nt targeting sequence, and a gRNA scaffold to guide Cas9n. It includes a CBh promoter for Cas9n (D10A) and puromycin resistance, GFP for transfection verification, and nuclear localization signals (NLS). The 2A peptide allows co-expression of Cas9n and Puro from a single promoter, enabling precise genome editing with reduced off-target effects.
Lamin B receptor双切酶质粒(h)和Lamin B receptor双切酶质粒(h2)编码针对LBR的不同配对gRNA设计。其中一种或两种设计可能均有提供
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Lamin B receptor双切口酶质粒(h)
sc-403633-NIC
20 µg
CNY3084.00
Lamin B receptor双切口酶质粒(h2)
sc-403633-NIC-2
20 µg
CNY3084.00
LBR 编码 lamin B 受体(lamin B receptor),它是内核膜上的一种整合膜蛋白,可与 B 型核纤层蛋白(lamins)以及与异染色质相关的因子结合,从而帮助将染色质锚定在核纤层上。通过这些相互作用,LBR 参与核膜结构的建立与维持、核周异染色质的维持,并在间期及有丝分裂退出过程中调控基因组的空间组织。LBR 还含有一个类似固醇还原酶的结构域,与脂质代谢过程相关,将细胞核结构与细胞稳态联系起来。LBR 功能异常与核形态及染色质分布缺陷有关,因此与核膜相关疾病研究以及更广泛的基因组稳定性机制研究密切相关。
Lamin B receptor 双切酶质粒(h)由一对匹配的质粒组成,专为在 human 细胞系中对 LBR 位点进行高特异性编辑而设计。每个质粒分别表达Cas9 D10A切口酶和针对LBR内不同DNA链的独特sgRNA。当这两种切口酶被引导至相邻但位于DNA链相反侧的位点时,会产生错位的单链切口,从而共同形成错位双链断裂,这需要两个引导RNA在靶位点上协同发挥作用。由此产生的DNA断裂通过内源性细胞修复途径(最常见的是非同源末端连接(NHEJ))得到修复,从而导致插入或缺失,进而破坏LBR的功能。通过要求双sgRNA在靶位点结合,双切口方法提高了编辑特异性,并为需要对靶向精度进行额外控制的应用提供了互补的CRISPR策略。