6IV6

Cryo-EM structure of AcrVA5-acetylated MbCas12a in complex with crRNA


Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
APF18510Nuclease domain (NUC)Nuclease domainThis is a nuclease (NUC) domain found in Cpf1, an RNA-guided endonuclease of a type V CRISPR-Cas system. Structural and functional analysis indicate that this domain is involved in DNA cleavage [1].Domain
APF18501Alpha helical recognition lobe domain (REC1)Alpha helical recognition lobe domainCpf1 is an RNA-guided endonuclease of a type V CRISPR-Cas system. Cpf1 adopts a bilobed architecture consisting of an alpha-helical recognition (REC) lobe and a nuclease (NUC) lobe, with the small CRISPR RNAs (crRNAs)-target DNA heteroduplex bound to ...Cpf1 is an RNA-guided endonuclease of a type V CRISPR-Cas system. Cpf1 adopts a bilobed architecture consisting of an alpha-helical recognition (REC) lobe and a nuclease (NUC) lobe, with the small CRISPR RNAs (crRNAs)-target DNA heteroduplex bound to the positively charged, central channel between the two lobes. The REC lobe consists of the REC1 and REC2 domains where REC1 comprises 13 alpha helices, and REC2 comprises ten alpha helices and two beta strands that form a small antiparallel sheet [1]. This entry represents REC1 domain.
Domain
APF18516RuvC nuclease domain (RuvC_1)RuvC nuclease domainThis is a RuvC nuclease domain found in type V CRISPR-associated protein Cas12a (Cpf1), used for genome editing applications. These proteins carry out endoribonuclease activity for processing its own guide RNAs and RNA-guided DNase activity for targe ...This is a RuvC nuclease domain found in type V CRISPR-associated protein Cas12a (Cpf1), used for genome editing applications. These proteins carry out endoribonuclease activity for processing its own guide RNAs and RNA-guided DNase activity for target DNA cleavage. The C-terminal region of Cas12a carries the RUVC domain, NUC domain Pfam:PF18510 and the arginine-rich bridge helix (BH). Both the NUC and BH domains are nested in the RuvC domain. Mutations in the RuvC domain impair cleavage of both strands in a target DNA duplex, while a mutation in the Nuc domain impaired target strand cleavage only. This indicates that the DNA nuclease active sites are located at the interface of the RuvC and Nuc domains and that cleavage of the non-target DNA strand by the RuvC domain is a prerequisite for target strand cleavage by the Nuc domain [1].
Domain