Protein
CRISPR-associated endoribonuclease Cas2
Organism
Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Function
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). The type III-A Csm effector complex binds crRNA and acts as a crRNA-guided RNase, DNase and cyclic oligoadenylate synthase; binding of target RNA cognate to the crRNA is required for all activities (Probable). This CRISPR-Cas system protects bacteria against transformation with plasmids containing DNA homologous to its spacer regions (PubMed:29979631).
Similarity
Belongs to the CRISPR-associated endoribonuclease Cas2 protein family.
Sequence
MPTRSREEYFNLPLKVDESSGTIGKMFVLVIYDISDNRRRASLAKILAGFGYRVQESAFEAMLTKGQLAKLVARIDRFAIDCDNIRIYKIRGVAAVTFYGRGRLVSAEEFVFF