CRISPR-Cas9 蛋白, Streptococcus pyogenes M1 (sf9, NLS, His)

The CRISPR-Cas9 protein is part of an immune system that defends against genetic elements.It processes RNA and aids in cleaving DNA targets.Protein and guide RNAs are necessary for its function.The protein recognizes specific sequences to distinguish self from nonself and provides immunity against matching genetic elements. CRISPR-Cas9 Protein, Streptococcus pyogenes M1 (sf9, NLS, His) is the recombinant CRISPR-Cas9 protein, expressed by Sf9 insect cells , with C-His labeled tag.

CRISPR-Cas9 是一种革命性的分子工具，它构成了一种适应性免疫系统，可以防御病毒、转座元件和接合质粒等移动遗传元件。在这个系统中，CRISPR簇包含间隔区，这些间隔区是与之前的移动元件互补的序列，充当过去遭遇的记忆库。该过程涉及 CRISPR RNA (crRNA) 的转录和加工，其中，对于 II 型 CRISPR 系统，前 crRNA 的正确加工需要反式编码的小 RNA (tracrRNA)、内源性核糖核酸酶 3 (rnc) 和关键的 Cas9蛋白质。tracrRNA 引导核糖核酸酶 3 处理 pre-crRNA，Cas9 稳定 pre-crRNA:tracrRNA 相互作用。在后续步骤中，Cas9/crRNA/tracrRNA 复合物充当核酸内切酶，用互补的间隔序列切割靶 DNA。如果没有两个特定引导 RNA (gRNA) 的指导，Cas9 就会失活，这强调了这两种 gRNA 对于 DNA 结合和核酸酶活性的必要性。Cas9 对 CRISPR 重复序列中原型间隔子相邻基序 (PAM) 的识别对于区分自身与非自身至关重要，从而确保准确的目标识别。这个复杂的系统通过一种称为 CRISPR 干扰的机制赋予对入侵遗传元件的免疫力。

1. 1 μg = 5 U ,1 U is defined as cutting 1 ug 1 KB dsDNA in 30 min at 37℃ .
2. CRISPR-Cas9 Protein achieves ≥ 90% substrate cleavage measured by an in vitro DNA cleavage assay.

Others

Sf9 insect cells

C-His

WP_010922251 (M1-D1368)

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MPAAKRVKLDMDKKYSIGLDIGTNSVGWAVITDEYKVPSKKFKVLGNTDRHSIKKNLIGALLFDSGETAEATRLKRTARRRYTRRKNRICYLQEIFSNEMAKVDDSFFHRLEESFLVEEDKKHERHPIFGNIVDEVAYHEKYPTIYHLRKKLVDSTDKADLRLIYLALAHMIKFRGHFLIEGDLNPDNSDVDKLFIQLVQTYNQLFEENPINASGVDAKAILSARLSKSRRLENLIAQLPGEKKNGLFGNLIALSLGLTPNFKSNFDLAEDAKLQLSKDTYDDDLDNLLAQIGDQYADLFLAAKNLSDAILLSDILRVNTEITKAPLSASMIKRYDEHHQDLTLLKALVRQQLPEKYKEIFFDQSKNGYAGYIDGGASQEEFYKFIKPILEKMDGTEELLVKLNREDLLRKQRTFDNGSIPHQIHLGELHAILRRQEDFYPFLKDNREKIEKILTFRIPYYVGPLARGNSRFAWMTRKSEETITPWNFEEVVDKGASAQSFIERMTNFDKNLPNEKVLPKHSLLYEYFTVYNELTKVKYVTEGMRKPAFLSGEQKKAIVDLLFKTNRKVTVKQLKEDYFKKIECFDSVEISGVEDRFNASLGTYHDLLKIIKDKDFLDNEENEDILEDIVLTLTLFEDREMIEERLKTYAHLFDDKVMKQLKRRRYTGWGRLSRKLINGIRDKQSGKTILDFLKSDGFANRNFMQLIHDDSLTFKEDIQKAQVSGQGDSLHEHIANLAGSPAIKKGILQTVKVVDELVKVMGRHKPENIVIEMARENQTTQKGQKNSRERMKRIEEGIKELGSQILKEHPVENTQLQNEKLYLYYLQNGRDMYVDQELDINRLSDYDVDHIVPQSFLKDDSIDNKVLTRSDKNRGKSDNVPSEEVVKKMKNYWRQLLNAKLITQRKFDNLTKAERGGLSELDKAGFIKRQLVETRQITKHVAQILDSRMNTKYDENDKLIREVKVITLKSKLVSDFRKDFQFYKVREINNYHHAHDAYLNAVVGTALIKKYPKLESEFVYGDYKVYDVRKMIAKSEQEIGKATAKYFFYSNIMNFFKTEITLANGEIRKRPLIETNGETGEIVWDKGRDFATVRKVLSMPQVNIVKKTEVQTGGFSKESILPKRNSDKLIARKKDWDPKKYGGFDSPTVAYSVLVVAKVEKGKSKKLKSVKELLGITIMERSSFEKNPIDFLEAKGYKEVKKDLIIKLPKYSLFELENGRKRMLASAGELQKGNELALPSKYVNFLYLASHYEKLKGSPEDNEQKQLFVEQHKHYLDEIIEQISEFSKRVILADANLDKVLSAYNKHRDKPIREQAENIIHLFTLTNLGAPAAFKYFDTTIDRKRYTSTKEVLDATLIHQSITGLYETRIDLSQLGGDPAAKRVKLDPAAKRVKLD

Approximately 163 kDa

Greater than 90% as determined by reducing SDS-PAGE.

溶液

Supplied as sterile 20 mM Tris, 300 mM NaCl, 20-50 % glycerol, pH 8.0, 0.5 mM PMSF, 0.1 mM EDTA, 0.5 mM TCEP.

<1 EU/μg, determined by LAL method.

N/A.

Stored at -80°C for 1 year. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping with dry ice.