What Is the Function of Cas
The Crispr-Cas System Is an Adaptive Immune System of Bacteria and Archaea, Which Protects the Bacteria from Invaders, Including Bacteriophages or Phages and...
The CRISPR-cas system is an adaptive immune system of bacteria and archaea, which protects the bacteria from invaders, including bacteriophages or phages and mobile genetic elements (MGEs) [16]. The CRISPR-cas system degrades foreign genetic elements in three steps (Fig. 1).
What are cas genes?
CRISPR (/ˈkrɪspər/) (an acronym for clustered regularly interspaced short palindromic repeats) is a family of DNA sequences found in the genomes of prokaryotic organisms such as bacteria and archaea. These sequences are derived from DNA fragments of bacteriophages that had previously infected the prokaryote.
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What is PAM sequence?
The protospacer adjacent motif (or PAM for short) is a short DNA sequence (usually 2-6 base pairs in length) that follows the DNA region targeted for cleavage by the CRISPR system, such as CRISPR-Cas9. The PAM is required for a Cas nuclease to cut and is generally found 3-4 nucleotides downstream from the cut site.
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