ACROBiosystems聚焦于细胞与基因治疗领域,作为领先的重组蛋白供应商隆重推出包括CAS9、CAS12a等CAS系列蛋白,主要用于定点基因编辑等,以提供高编辑效率。
原核生物和感染它们的病毒之间的相互作用不断演化,导致了CRISPR-Cas系统的广泛多样性。人们一般将CRISPR-Cas系统分为两类(1类和2类)。迄今为止,大多数研究人员使用的都是2类CRISPR-Cas系统,在该类中,研究最多的是Ⅱ型,也就是CRISPR-Cas9系统。
CRISPR-Cas9 系统只有三个必需的组件(Cas9 以及 crRNA 和 trRNA)。可以在各种真核细胞中进行靶向基因切割和基因编辑,通CRISPR-Cas9调控机理图:通过非同源末端连接 (NHEJ) 或同源定向修复 (HDR) 内源性修复双链 DNA 断裂[1]过人工设计的 sgRNA(guide RNA)来识别目的基因组序列,并引导 Cas9 蛋白进行有效切割 DNA 双链,形成双链断裂,双链断裂可以通过细胞修复机制使用非同源末端连接或同源定向修复机制进行修复,最终达到对基因组DNA 进行修饰的目的,可以将编辑定向到几乎任何基因组位点,实现对基因功能进行高通量的研究。
CRISPR-Cas9调控机理图:通过非同源末端连接 (NHEJ) 或同源定向修复 (HDR) 内源性修复双链 DNA 断裂[1]
The purity of GMP GENPower™ NLS-Cas9 Nuclease (Cat. No. GMP-CA9S18) was greater than 95% as determined by SEC-HPLC.
Different amounts of Cas9 were incubated with the same amount of excess gRNA and plasmid for 60 minutes at 37°C. When using 400-200 ng ACRO's Cas9, the cutting efficiency is greater than 90% (QC tested). In comparison, when using a 200 ng CAS9 from company T, the cutting efficiency is only about 50%
The TCR knockout efficiency with GMP GENPower™ NLS-Cas9 Nuclease in human primary T cells, GMP GENPower™ NLS-Cas9 Nuclease achieved over 95% knockout efficiency.
The cleavage efficiency in HEK293 cell 72 hours after electroporation of GMP GENPower™ NLS-Cas9 Nuclease RNP.
The cleavage efficiency in iPSC 72 hours after electroporation of GMP GENPower™ NLS-Cas9 Nuclease RNP.
The knockout efficiency for B2M in primary T cell was measured by Flow Cytometry.
Enzymatic activity assay demonstrates that GMP GENPower™ NLS-Cas9 Nuclease (Cat. No. GMP-CA9S18) is stable at 37°C for 35 days
Enzymatic activity assay demonstrates batch-to-batch consistency between Acro's GMP and PG Cas9.