Annotations: 7D2N

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d7d2na_	All beta proteins	SH3-like barrel	Cell growth inhibitor/plasmid maintenance toxic component	automated matches	automated matches	(Deinococcus radiodurans ) [TaxId: 1299 ],	SCOPe (2.08)
D [auth B]	d7d2nb_	All beta proteins	SH3-like barrel	Cell growth inhibitor/plasmid maintenance toxic component	automated matches	automated matches	(Deinococcus radiodurans ) [TaxId: 1299 ],	SCOPe (2.08)
E [auth C]	d7d2nc_	All beta proteins	SH3-like barrel	Cell growth inhibitor/plasmid maintenance toxic component	automated matches	automated matches	(Deinococcus radiodurans ) [TaxId: 1299 ],	SCOPe (2.08)
B [auth D]	d7d2nd_	All beta proteins	SH3-like barrel	Cell growth inhibitor/plasmid maintenance toxic component	automated matches	automated matches	(Deinococcus radiodurans ) [TaxId: 1299 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Cell growth inhibitor/plasmid maintenance toxic component	8103514	3000352	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	Cell growth inhibitor/plasmid maintenance toxic component	8103514	3000352	SCOP2B (2022-06-29)
E [auth C]	SCOP2B Superfamily	Cell growth inhibitor/plasmid maintenance toxic component	8103514	3000352	SCOP2B (2022-06-29)
B [auth D]	SCOP2B Superfamily	Cell growth inhibitor/plasmid maintenance toxic component	8103514	3000352	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF02452	e7d2nA1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02452	ECOD (1.6)
D [auth B]	PF02452	e7d2nB1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02452	ECOD (1.6)
E [auth C]	PF02452	e7d2nC1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02452	ECOD (1.6)
B [auth D]	PF02452	e7d2nD1	A: beta barrels	X: SH3	H: SH3	T: SH3	F: PF02452	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth D], D [auth B], E [auth C]	PF02452	PemK-like, MazF-like toxin of type II toxin-antitoxin system (PemK_toxin)	PemK-like, MazF-like toxin of type II toxin-antitoxin system	PemK is a growth inhibitor in E. coli known to bind to the promoter region of the Pem operon, auto-regulating synthesis. This family represents the toxin molecule of a typical bacterial toxin-antitoxin system pairing. The family includes a number of ...	PemK is a growth inhibitor in E. coli known to bind to the promoter region of the Pem operon, auto-regulating synthesis. This family represents the toxin molecule of a typical bacterial toxin-antitoxin system pairing. The family includes a number of different toxins, such as MazF, Kid, PemK, ChpA, ChpB and ChpAK.	Domain
C [auth E], F	PF04014	Antidote-toxin recognition MazE, bacterial antitoxin (MazE_antitoxin)	Antidote-toxin recognition MazE, bacterial antitoxin	AbrB-like is a family of small proteins that operate in conjunction with a cognate toxin molecule. The commonly attributed role of toxin-antitoxin systems is to maintain low-copy number plasmids from one generation to the next. Such gene-pairs are al ...	AbrB-like is a family of small proteins that operate in conjunction with a cognate toxin molecule. The commonly attributed role of toxin-antitoxin systems is to maintain low-copy number plasmids from one generation to the next. Such gene-pairs are also found on chromosomes and to be associated with a number of biological functions such as: reduction of protein synthesis, gene regulation and retardation of cell growth under nutritional stress [1]. This family includes proteins from a number of different pairings, eg MazE, AbrB, VapB [2], PhoU, PemI-like and SpoVT. MazE is the antidote to the toxin MazF of E. coli. MazE-MazF in E. coli is a regulated prokaryotic chromosomal addiction module. MazE antidote is degraded by the ClpPA protease of the bacterial proteasome. MazE-MazF is thought to play a role in programmed cell death when cells suffer nutrient deprivation [3], and MazE-MazF modules have also been implicated in the bacteriostatic effects of other addiction modules [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B [auth D], D [auth B], E [auth C]	Endoribonuclease MazF	DNA binding binding organic cyclic compound binding nucleic acid binding endonuclease activity nuclease activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity hydrolase activity catalytic activity	catabolic process RNA metabolic process primary metabolic process rRNA catabolic process nucleic acid metabolic process macromolecule catabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process ncRNA metabolic process nucleic acid catabolic process metabolic process catabolic process RNA metabolic process primary metabolic process rRNA catabolic process nucleic acid metabolic process macromolecule catabolic process organic cyclic compound catabolic process nucleobase-containing compound catabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process ncRNA metabolic process nucleic acid catabolic process metabolic process macromolecule metabolic process rRNA metabolic process organic substance catabolic process RNA catabolic process regulation of cellular process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process organic substance biosynthetic process negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process mRNA catabolic process regulation of biological process cellular metabolic process negative regulation of metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process mRNA metabolic process negative regulation of cellular biosynthetic process regulation of cellular biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process cellular process regulation of metabolic process	-
C [auth E], F	AbrB/MazE/SpoVT family DNA-binding domain-containing protein	DNA binding binding organic cyclic compound binding nucleic acid binding molecular sequestering activity toxin sequestering activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth D], D [auth B], E [auth C]	IPR011067	Plasmid maintenance toxin/Cell growth inhibitor	Homologous Superfamily
A, B [auth D], D [auth B], E [auth C]	IPR003477	mRNA interferase PemK-like	Family
C [auth E], F	IPR039052	Antitoxin PemI-like	Family
C [auth E], F	IPR037914	SpoVT-AbrB domain superfamily	Homologous Superfamily
C [auth E], F	IPR007159	SpoVT-AbrB domain	Domain

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.