Annotations: 2NTT

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d2nttb1	All beta proteins	OB-fold	Bacterial enterotoxins	automated matches	automated matches	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)
B	d2nttb2	Alpha and beta proteins (a+b)	beta-Grasp (ubiquitin-like)	Superantigen toxins, C-terminal domain	Superantigen toxins, C-terminal domain	automated matches	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)
B	d2nttb3	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)
A	d2ntta1	All beta proteins	OB-fold	Bacterial enterotoxins	automated matches	automated matches	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)
A	d2ntta2	Alpha and beta proteins (a+b)	beta-Grasp (ubiquitin-like)	Superantigen toxins, C-terminal domain	Superantigen toxins, C-terminal domain	automated matches	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)
A	d2ntta3	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	CoV_NSP4_C	e2nttB3	A: a/b three-layered sandwiches	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: CoV_NSP4_C	ECOD (v294.1)
A	CoV_NSP4_C	e2nttA3	A: a/b three-layered sandwiches	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: CoV_NSP4_C	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.10.20.120	Alpha Beta	Roll	Ubiquitin-like (UB roll)		CATH (4.3.0)
B	2.40.50.110	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)		CATH (4.3.0)
A	3.10.20.120	Alpha Beta	Roll	Ubiquitin-like (UB roll)		CATH (4.3.0)
A	2.40.50.110	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)		CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Staphylococcal enterotoxin K	cation binding ion binding binding metal ion binding small molecule binding toxin activity	-	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR006123	Staphylococcal/Streptococcal toxin, beta-grasp domain	Domain
A, B	IPR006126	Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin, conserved site	Conserved Site
A, B	IPR016091	Superantigen toxin, C-terminal	Homologous Superfamily
A, B	IPR006173	Staphylococcal/Streptococcal toxin, OB-fold	Domain
A, B	IPR013307	Superantigen, staphylococcal/streptococcal toxin, bacterial	Family
A, B	IPR008992	Enterotoxin	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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.