Annotations: 6M6V

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	NTP_transf_2	e6m6vA1	A: a+b three layers	X: Nucleotidyltransferase-like	H: Nucleotidyltransferase (From Topology)	T: Nucleotidyltransferase	F: NTP_transf_2	ECOD (1.6)
B	NTase_sub_bind	e6m6vB1	A: alpha bundles	X: Four-helical up-and-down bundle	H: HEPN	T: Nucleotidyltransferase substrate binding subunit/domain	F: NTase_sub_bind	ECOD (1.6)
C	NTase_sub_bind	e6m6vC1	A: alpha bundles	X: Four-helical up-and-down bundle	H: HEPN	T: Nucleotidyltransferase substrate binding subunit/domain	F: NTase_sub_bind	ECOD (1.6)
D	NTase_sub_bind	e6m6vD1	A: alpha bundles	X: Four-helical up-and-down bundle	H: HEPN	T: Nucleotidyltransferase substrate binding subunit/domain	F: NTase_sub_bind	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E, F, G	RNA (5'-R(PAPAP*A)-3')	-	-	-
A	Toxin-antitoxin system antidote Mnt family	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 DNA binding nucleic acid binding transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups cation binding metal ion binding	-	-
B, C, D	Toxin-antitoxin system toxin HepN family	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR041633	Polymerase beta, nucleotidyltransferase	Domain
A	IPR043519	Nucleotidyltransferase superfamily	Homologous Superfamily
A	IPR052930	Type VII TA system antitoxin MntA	Family
B, C, D	IPR052379	Type VII TA system RNase	Family
B, C, D	IPR008201	Ribonuclease HepT-like	Family
B, C, D	IPR037038	tRNA nuclease HepT-like superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.