Annotations: 7AE2

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF01934	e7ae2A1	A: alpha bundles	X: Four-helical up-and-down bundle	H: HEPN	T: Nucleotidyltransferase substrate binding subunit/domain	F: PF01934	ECOD (1.6)
B	PF18765	e7ae2B1	A: a+b three layers	X: Nucleotidyltransferase-like	H: Nucleotidyltransferase (From Topology)	T: Nucleotidyltransferase	F: PF18765	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A	PF01934	Ribonuclease HepT-like (HepT-like)	Ribonuclease HepT-like	-	Family
B	PF18765	Polymerase beta, Nucleotidyltransferase (Polbeta)	Polymerase beta, Nucleotidyltransferase	A member of the nucleotidyltransferase fold found in polymorphic toxins (NTox45) and polyvalent proteins [1].	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	HEPN toxin	endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity catalytic activity binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid RNA nuclease activity	-	protein-containing complex transcription regulator complex toxin-antitoxin complex transcription repressor complex
B	MNT ANTITOXIN	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups cation binding metal ion binding	-	-

Chains	Accession	Name	Type
A	IPR008201	Ribonuclease HepT-like	Family
A	IPR037038	tRNA nuclease HepT-like superfamily	Homologous Superfamily
B	IPR041633	Polymerase beta, nucleotidyltransferase	Domain
B	IPR043519	Nucleotidyltransferase superfamily	Homologous Superfamily