NF040570

RNA-guided endonuclease TnpB family protein

NCBIfam entry
Member databaseNCBIfam (includes TIGRFAMs)
NCBIfam typefamily
Short nameguided_TnpB

Description

This family includes RNA-guided endonuclease TnpB from IS200/IS605 family elements (NF038281) and IS607 family elements (NF038280), but also many additional proteins. It exhibits homolog to or actually includes some CRISPR-associated (Cas) proteins such as the type V CRISPR-associated protein C2c8. For a long time, TnpB proteins were described as accessory proteins in IS (insertion sequence) elements, present as one of just one or two proteins encoded in the element but not necessary for transposition. The programmable RNA-guided endonuclease TnpB proteins may provide a CRISPR-like, widespread form of phage defense by RNA-guided DNA degradation.
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