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Cat. No. Species Product Description Structure Purity Feature
GMP-CA9S18 Streptococcus pyogenes GMP GENPower™ NLS-Cas9 Nuclease
GMP-CA9S18-sds
GMP-CA9S18-hplc
CA9-S5149 Streptococcus pyogenes GENPower™ NLS-Cas9 Nuclease, premium grade
CA9-S5149-sds
ACRO Quality

Part of Bioactivity data

CA9-S5149-MALS-HPLC
CAS9 MALS images

The purity of GENPower™ NLS-Cas9 Nuclease, premium grade (Cat. No. CA9-S5149) is more than 95% and the molecular weight of this protein is around 140-180kDa verified by SEC-MALS.

The purity of GMP GENPower™ NLS-Cas9 Nuclease (Cat. No. GMP-CA9S18) was greater than 95% as determined by SEC-HPLC.

Synonym Name

CAS9

Background

CRISPR (clustered regularly interspaced short palindromic repeat) is an adaptive immune system that provides protection against mobile genetic elements (viruses, transposable elements and conjugative plasmids), CRISPR clusters contain spacers, sequences complementary to antecedent mobile elements, and target invading nucleic acids. CRISPR clusters are transcribed and processed into CRISPR RNA (crRNA). In type II CRISPR systems correct processing of pre-crRNA requires a trans-encoded small RNA (tracrRNA), endogenous ribonuclease 3 (rnc) and this protein. The tracrRNA serves as a guide for ribonuclease 3-aided processing of pre-crRNA; Cas9 only stabilizes the pre-crRNA:tracrRNA interaction and has no catalytic function in RNA processing. Subsequently Cas9/crRNA/tracrRNA endonucleolytically cleaves linear or circular dsDNA target complementary to the spacer; Cas9 is inactive in the absence of the 2 guide RNAs (gRNA). The target strand not complementary to crRNA is first cut endonucleolytically, then trimmed 3'-5' exonucleolytically. DNA-binding requires protein and both gRNAs, as does nuclease activity. Cas9 recognizes the protospacer adjacent motif (PAM) in the CRISPR repeat sequences to help distinguish self versus nonself, as targets within the bacterial CRISPR locus do not have PAMs. DNA strand separation and heteroduplex formation starts at PAM sites; PAM recognition is required for catalytic activity.

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