CRISPR-associated endoribonuclease C2c2 - P0DOC6 (C2C2_LEPSD)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P0DOC6: 2
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 sequences complementary to antecedent mobile elements and target invading nucleic acids. CRISPR clusters are transcribed and processed into CRISPR RNA (crRNA, optimally 28 nucleotides in this system) (PubMed:27256883). When the appropriate sequences are cloned into the CRISPR array confers immunity to ssRNA(+) enterobacteria phage MS2 (PubMed:27256883). Cleaves linear ssRNA in a crRNA-dependent fashion, preferentially at U residues; has no activity on partially dsRNA, ssDNA or dsDNA (PubMed:27256883). RNA secondary structure surrounding the target influence the cleavage site and efficiency; unlike other CRISPR-Cas effectors C2c2 cleaves outside of the crRNA binding site (PubMed:27256883). In the presence of a viable RNA target others RNAs can also be degraded in vitro and probably also in vivo, suggesting this type of CRISPR-Cas might also prevent viral spread by inducing programmed cell death or dormancy (PubMed:27256883). This system has a 3' protospacer flanking site (PFS), it does not cleave when the 3' PFS is G (PFS is equivalent to PAM, the protospacer adjacent motif) (PubMed:27256883). Mutations of its active site residues results in an RNA-programmed RNA-binding protein (PubMed:27256883). UniProt
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Subunit Structure
Monomer (PubMed:27256883). UniProt
The RNase active sites are probably within the 2 HEPN-like folds, and the 2 folds might interact in vivo (PubMed:26593719, PubMed:27256883). UniProt
  • Other Gene names: c2c2
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