Annotations: 7V1N

Structure of the Clade 2 C. difficile TcdB in complex with its receptor TFPI

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth K]	SCOP2B Superfamily	BPTI-like	8070115	3000628	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Nucleotide-diphospho-sugar transferases	8103504	3000077	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)
B [auth K]	Ribosomal_L36	e7v1nK1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Ribosomal_L36	ECOD (v294.2)
A	Ribosomal_L36	e7v1nA1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Ribosomal_L36	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.11050	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	MARTX cysteine protease (CPD) domain	CATH (utative)
A	2.10.270.10	Mainly Beta	Ribbon	left handed beta-beta-3-solenoid	Cholin Binding	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth K]	PF00014	Kunitz/Bovine pancreatic trypsin inhibitor domain (Kunitz_BPTI)	Kunitz/Bovine pancreatic trypsin inhibitor domain	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the ...	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the tick anticoagulant peptide (TAP, Swiss:P17726). This is a highly selective inhibitor of factor Xa in the blood coagulation pathways [1]. TAP molecules are highly dipolar [2], and are arranged to form a twisted two- stranded antiparallel beta-sheet followed by an alpha helix [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth K]	Isoform Beta of Tissue factor pathway inhibitor	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity	multicellular organismal process regulation of body fluid levels wound healing response to stimulus hemostasis biological regulation blood coagulation response to stress coagulation regulation of biological quality response to wounding cellular response to stimulus response to lipid response to endogenous stimulus multicellular organismal process regulation of body fluid levels wound healing response to stimulus hemostasis biological regulation blood coagulation response to stress coagulation regulation of biological quality response to wounding cellular response to stimulus response to lipid response to endogenous stimulus cellular response to endogenous stimulus cellular response to chemical stimulus response to hormone response to chemical response to steroid hormone cellular response to lipid cellular process cellular response to steroid hormone stimulus cellular response to hormone stimulus regulation of response to external stimulus negative regulation of biological process regulation of response to wounding regulation of coagulation regulation of response to stress regulation of multicellular organismal process regulation of hemostasis regulation of biological process negative regulation of response to stimulus negative regulation of wound healing regulation of blood coagulation negative regulation of blood coagulation response to external stimulus negative regulation of response to wounding negative regulation of hemostasis negative regulation of coagulation regulation of response to stimulus negative regulation of response to external stimulus regulation of wound healing negative regulation of multicellular organismal process	cellular anatomical structure membrane side of membrane extracellular region cell surface membrane microdomain cell periphery membrane raft plasma membrane raft plasma membrane plasma membrane region caveola
A	Toxin B	glycosyltransferase activity transferase activity catalytic activity binding lipid binding toxin activity cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein hydrolase activity cation binding ion binding metal ion binding small molecule binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	cellular anatomical structure extracellular region host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region cellular anatomical structure extracellular region host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part host cell cytoplasm part host intracellular organelle host cell endosome membrane host cell cytoplasm host cell part host cell endosome host intracellular region host cell plasma membrane host cell cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth K]	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
B [auth K]	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
B [auth K]	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
B [auth K]	IPR008296	Tissue factor pathway inhibitor-like	Family
B [auth K]	IPR050098	Tissue factor pathway inhibitor/Kunitz-type serine protease inhibitor-like	Family
A	IPR038383	CGT/MARTX, cysteine protease (CPD) domain superfamily	Homologous Superfamily
A	IPR024772	TcdA/TcdB toxin, N-terminal helical domain	Domain
A	IPR020974	CGT/MARTX, cysteine protease (CPD) domain	Domain
A	IPR024769	TcdA/TcdB toxin, pore forming domain	Domain
A	IPR029044	Nucleotide-diphospho-sugar transferases	Homologous Superfamily
A	IPR024770	TcdA/TcdB toxin, catalytic glycosyltransferase domain	Domain
A	IPR018337	Cell wall/choline-binding repeat	Repeat

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth K]	: P10646	thrombotic thrombocytopenic purpura Venous Thrombosis juvenile idiopathic arthritis thrombophilia hydrolethalus syndrome IgA glomerulonephritis invasive ductal breast carcinoma lung adenocarcinoma malignant colon neoplasm atopic eczema malignant mesothelioma breast cancer non-small cell lung carcinoma congenital thrombotic thrombocytopenic purpura pilocytic astrocytoma thrombotic thrombocytopenic purpura Venous Thrombosis juvenile idiopathic arthritis thrombophilia hydrolethalus syndrome IgA glomerulonephritis invasive ductal breast carcinoma lung adenocarcinoma malignant colon neoplasm atopic eczema malignant mesothelioma breast cancer non-small cell lung carcinoma congenital thrombotic thrombocytopenic purpura pilocytic astrocytoma Duchenne muscular dystrophy psoriasis exocrine pancreatic carcinoma thrombophilia due to activated protein C resistance gastric carcinoma tuberculosis interstitial cystitis adenoma lung cancer malignant ependymoma atypical teratoid rhabdoid tumor malignant pancreatic neoplasm breast carcinoma ovarian cancer cystic fibrosis pituitary cancer ductal breast carcinoma in situ Sjogren syndrome facioscapulohumeral muscular dystrophy thrombotic disease glioblastoma ulcerative colitis interstitial lung disease juvenile dermatomyositis lung carcinoma astrocytic tumor malignant glioma Barrett esophagus myopathy pancreatic ductal adenocarcinoma primitive neuroectodermal tumor esophageal adenocarcinoma

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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.