6KC8

Crystal structure of WT Nme1Cas9 in complex with sgRNA and target DNA (ATATGATT PAM) in post-cleavage state


Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
APF13395HNH endonuclease (HNH_4)HNH endonucleaseThis HNH nuclease domain is found in CRISPR-related proteins.Domain
APF18541RuvC endonuclease subdomain 3 (RuvC_III)RuvC endonuclease subdomain 3Cas9 proteins are abundant across the bacterial kingdom, but vary widely in both sequence and size. All known Cas9 enzymes contain an HNH domain that cleaves the DNA strand complementary to the guide RNA sequence (target strand), and a RuvC nuclease ...Cas9 proteins are abundant across the bacterial kingdom, but vary widely in both sequence and size. All known Cas9 enzymes contain an HNH domain that cleaves the DNA strand complementary to the guide RNA sequence (target strand), and a RuvC nuclease domain required for cleaving the noncomplementary strand (non-target strand), yielding double-strand DNA breaks (DSBs). The crystal structures of type II-A and II-C Cas9 proteins highlight the features in Cas9 enzymes that support their function as RNA-guided endonucleases. Cas9 enzymes adopt a bilobed architecture composed of a nuclease lobe containing juxtaposed RuvC and HNH nuclease domains and a variable alpha-helical lobe likely to be involved in nucleic acid binding. The RuvC domain forms the structural core of the nuclease lobe, a six-stranded beta sheet surrounded by four alpha helices, with all three conserved subdomains (I, II, III) contributing catalytic residues to the active site [1].
Domain

Gene Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
ACRISPR-associated endonuclease Cas9
CDNA (5'-D(P*AP*AP*GP*TP*TP*AP*AP*AP*TP*AP*GP*CP*AP*GP*AP*GP*TP*GP*AP*CP*C)-3')none none none
PDNA (5'-D(*TP*AP*AP*AP*AP*TP*CP*AP*TP*AP*TP*GP*TP*A)-3')none none none
BsgRNAnone none none
DDNA (5'-D(*AP*TP*AP*TP*GP*AP*TP*TP*TP*TP*A)-3')none none none