Annotations: 3TND

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H	Pkinase, APH	e3tndH1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Pkinase, APH	ECOD (develop294)
F	Pkinase, APH	e3tndF1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Pkinase, APH	ECOD (develop294)
D	Pkinase, APH	e3tndD1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Pkinase, APH	ECOD (develop294)
B	MHC_I	e3tndB1	A: alpha bundles	X: MHC antigen-recognition domain	H: MHC antigen-recognition domain	T: MHC antigen-recognition domain	F: MHC_I	ECOD (develop294)
G	Pkinase, APH	e3tndG1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Pkinase, APH	ECOD (develop294)
E	Pkinase, APH	e3tndE1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Pkinase, APH	ECOD (develop294)
C	Pkinase, APH	e3tndC1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Pkinase, APH	ECOD (develop294)
A	PIN	e3tndA1	A: alpha bundles	X: Baculovirus p35 protein-related	H: HIT-related	T: HIT-related	F: PIN	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.10.260.10	Mainly Beta	Ribbon	Pemi-like Protein 1	Chain: D	CATH (4.3.0)
G	3.40.50.1010	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	5'-nuclease	CATH (4.3.0)
E	3.40.50.1010	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	5'-nuclease	CATH (4.3.0)
C	3.40.50.1010	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	5'-nuclease	CATH (4.3.0)
A	3.40.50.1010	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	5'-nuclease	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, D, F, H	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
A, C, E, G	PF01850	PIN domain (PIN)	PIN domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D, F, H	Antitoxin VapB	DNA binding binding nucleic acid binding	-	-
A, C, E, G	tRNA(fMet)-specific endonuclease VapC	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding hydrolase activity catalytic activity endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid catalytic activity, acting on RNA RNA nuclease activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D, F, H	IPR051734	Type II toxin-antitoxin VapB antitoxins	Family
B, D, F, H	IPR047976	Antitoxin VapB2-like	Family
B, D, F, H	IPR037914	SpoVT-AbrB domain superfamily	Homologous Superfamily
B, D, F, H	IPR007159	SpoVT-AbrB domain	Domain
A, C, E, G	IPR002716	PIN domain	Domain
A, C, E, G	IPR029060	PIN-like domain superfamily	Homologous Superfamily
A, C, E, G	IPR022907	VapC family	Family
A, C, E, G	IPR050556	Type II toxin-antitoxin system RNase	Family

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.