Annotations: 6M6W

Crystal structure the toxin-antitoxin MntA-HpeT mutant-Y104A

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	e6m6wA1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
E [auth F]	e6m6wF1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
B	e6m6wB1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
C	e6m6wC1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
D	e6m6wD1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
F [auth G]	e6m6wG1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
G [auth H]	e6m6wH1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
H [auth I]	e6m6wI1	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, E [auth F]	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, F [auth G], G [auth H], B, C, D, F [auth G], G [auth H], H [auth I]	PF01934	Ribonuclease HepT-like (HepT-like)	Ribonuclease HepT-like	This family includes the toxic component HepT of a type II toxin-antitoxin (TA) system, which has RNase activity. These proteins contain a HEPN (higher eukaryotes and prokaryotes nucleotide-binding) domain and are neutralised through tri-AMPylation b ...	This family includes the toxic component HepT of a type II toxin-antitoxin (TA) system, which has RNase activity. These proteins contain a HEPN (higher eukaryotes and prokaryotes nucleotide-binding) domain and are neutralised through tri-AMPylation by the cognate antitoxin MntA, containing a MNT (minimal nucleotidyltransferase) domain [1, 2, 3]. HepT-MnA form an heterooctamer (at a 2:6 ratio), a rare organisation for this kind of TA systems. HepT dimerises and enables the formation of a deep cleft at the HEPN-domain interface, containing the RX4-6H motif (where X is any amino acid and the residue immediately after the conserved R is typically a polar amino acid) as the active site that functions as an RNA-cleaving RNase. This type II TA system regulates cell motility and confers plasmid stability [2]. Due to the prevalence of these HEPN/MNT modules in bacteria and archaea, it has been suggested that these TA systems may also play a role in the environmental adaptation to extreme habitats [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, E [auth F]	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 anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding DNA binding nucleic acid binding adenylyltransferase activity transferase activity nucleotidyltransferase activity catalytic activity AMPylase activity transferase activity, transferring phosphorus-containing groups cation binding metal ion binding	RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process biosynthetic process metabolic process cellular process macromolecule metabolic process	-
B, C, D, F [auth G], G [auth H], B, C, D, F [auth G], G [auth H], H [auth I]	Toxin-antitoxin system toxin HepN family	hydrolase activity catalytic activity endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid binding nucleoside phosphate binding nucleotide binding heterocyclic compound binding small molecule binding catalytic activity, acting on RNA 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, E [auth F]	IPR052930	Protein adenylyltransferase MntA	Family
A, E [auth F]	IPR043519	Nucleotidyltransferase superfamily	Homologous Superfamily
A, E [auth F]	IPR041633	MntA antitoxin-like, nucleotidyltransferase domain	Domain
B, C, D, F [auth G], G [auth H], B, C, D, F [auth G], G [auth H], H [auth I]	IPR052379	Type VII TA system RNase	Family
B, C, D, F [auth G], G [auth H], B, C, D, F [auth G], G [auth H], H [auth I]	IPR008201	Ribonuclease HepT-like	Domain
B, C, D, F [auth G], G [auth H], B, C, D, F [auth G], G [auth H], H [auth I]	IPR037038	tRNA nuclease HepT-like superfamily	Homologous Superfamily

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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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

6M6W | pdb_00006m6w

Crystal structure the toxin-antitoxin MntA-HpeT mutant-Y104A

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage