Annotations: 2NTS

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth P]	d2ntsp2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	T-cell antigen receptor	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth P]	d2ntsp1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth A]	d2ntsa1	All beta proteins	OB-fold	Bacterial enterotoxins	automated matches	automated matches	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)
B [auth A]	d2ntsa2	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 [auth A]	d2ntsa3	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Staphylococcus aureus subsp. aureus COL ) [TaxId: 93062 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth P]	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054555	3000071	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 [auth P]	C1-set	e2ntsP2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set	ECOD (1.6)
A [auth P]	V-set_3	e2ntsP1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_3	ECOD (1.6)
B [auth A]	Stap_Strp_toxin	e2ntsA1	A: beta barrels	X: OB-fold	H: Bacterial enterotoxins (From Topology)	T: Bacterial enterotoxins	F: Stap_Strp_toxin	ECOD (1.6)
B [auth A]	Stap_Strp_tox_C	e2ntsA2	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: Stap_Strp_tox_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth P]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth A]	3.10.20.120	Alpha Beta	Roll	Ubiquitin-like (UB roll)		CATH (4.3.0)
B [auth A]	2.40.50.110	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth P]	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain	-	Domain
B [auth A]	PF01123	Staphylococcal/Streptococcal toxin, OB-fold domain (Stap_Strp_toxin)	Staphylococcal/Streptococcal toxin, OB-fold domain	This entry represents an OB-fold domain found in enterotoxins.	Domain
B [auth A]	PF02876	Staphylococcal/Streptococcal toxin, beta-grasp domain (Stap_Strp_tox_C)	Staphylococcal/Streptococcal toxin, beta-grasp domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth P]	TRBC1 protein	-	cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process response to stimulus signaling positive regulation of biological process cell communication positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process response to stimulus signaling positive regulation of biological process cell communication positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process regulation of biological process cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway immune response biological regulation T cell receptor signaling pathway regulation of response to stimulus immune system process regulation of immune response cellular process antigen receptor-mediated signaling pathway activation of immune response adaptive immune response multicellular organismal process T cell activation cell activation alpha-beta T cell activation lymphocyte activation leukocyte activation	cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex plasma membrane protein complex membrane protein complex alpha-beta T cell receptor complex receptor complex plasma membrane signaling receptor complex T cell receptor complex
B [auth A]	Staphylococcal enterotoxin K	toxin activity	-	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth P]	IPR003597	Immunoglobulin C1-set	Domain
A [auth P]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth P]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth P]	IPR007110	Immunoglobulin-like domain	Domain
B [auth A]	IPR006123	Staphylococcal/Streptococcal toxin, beta-grasp domain	Domain
B [auth A]	IPR006126	Staphylococcal enterotoxin/Streptococcal pyrogenic exotoxin, conserved site	Conserved Site
B [auth A]	IPR016091	Superantigen toxin, C-terminal	Homologous Superfamily
B [auth A]	IPR006173	Staphylococcal/Streptococcal toxin, OB-fold	Domain
B [auth A]	IPR013307	Superantigen, staphylococcal/streptococcal toxin, bacterial	Family
B [auth A]	IPR008992	Enterotoxin	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.