2KNT

THE 1.2 ANGSTROM STRUCTURE OF KUNITZ TYPE DOMAIN C5

External Resource: Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2knta_	Small proteins	BPTI-like	BPTI-like	Small Kunitz-type inhibitors & BPTI-like toxins	Collagen type VI (domain C5 from alpha 3 chain)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	BPTI-like	8038452	3000628	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	Kunitz_BPTI	e2kntA1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	4.10.410.10	Few Secondary Structures	Irregular	Factor Xa Inhibitor	Pancreatic trypsin inhibitor Kunitz domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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
A	COLLAGEN	structural molecule activity extracellular matrix structural constituent extracellular matrix structural constituent conferring tensile strength 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	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation intracellular signal transduction cell communication intracellular signaling cassette cellular process signal transduction phosphatidylinositol 3-kinase/protein kinase B signal transduction developmental process muscle structure development cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation intracellular signal transduction cell communication intracellular signaling cassette cellular process signal transduction phosphatidylinositol 3-kinase/protein kinase B signal transduction developmental process muscle structure development animal organ development anatomical structure development muscle organ development response to hexose response to organic substance response to monosaccharide response to carbohydrate response to glucose response to chemical response to oxygen-containing compound neuron apoptotic process apoptotic process cell death programmed cell death response to light stimulus response to radiation response to abiotic stimulus response to UV cell adhesion	extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle cell periphery extracellular matrix external encapsulating structure collagen-containing extracellular matrix extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle cell periphery extracellular matrix external encapsulating structure collagen-containing extracellular matrix sarcolemma plasma membrane membrane intracellular anatomical structure membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen endoplasmic reticulum lumen intracellular organelle organelle lumen endoplasmic reticulum cytoplasm protein-containing complex collagen trimer collagen beaded filament supramolecular fiber supramolecular polymer supramolecular complex collagen type VI trimer

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008160	Collagen triple helix repeat	Repeat
A	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
A	IPR003961	Fibronectin type III	Domain
A	IPR036465	von Willebrand factor A-like domain superfamily	Homologous Superfamily
A	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
A	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR002035	von Willebrand factor, type A	Domain
A	IPR041900	Collagen alpha-3(VI) chain, vWA domain	Domain
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P12111	limb-girdle muscular dystrophy Bethlem myopathy dystonic disorder Ullrich congenital muscular dystrophy congenital muscular dystrophy dystonia 27 kidney Wilms tumor Bethlem myopathy 1 Ullrich congenital muscular dystrophy 1 myopathy Emery-Dreifuss muscular dystrophy psoriasis Spontaneous abortion glioblastoma ulcerative colitis limb-girdle muscular dystrophy Bethlem myopathy dystonic disorder Ullrich congenital muscular dystrophy congenital muscular dystrophy dystonia 27 kidney Wilms tumor Bethlem myopathy 1 Ullrich congenital muscular dystrophy 1 myopathy Emery-Dreifuss muscular dystrophy psoriasis Spontaneous abortion glioblastoma ulcerative colitis intellectual disability lung adenocarcinoma atypical teratoid rhabdoid tumor malignant glioma medulloblastoma chronic obstructive pulmonary disease muscular dystrophy Duchenne muscular dystrophy nasopharyngeal carcinoma pancreatic ductal adenocarcinoma pilocytic astrocytoma pterygium esophageal adenocarcinoma transitional cell carcinoma head and neck cancer interstitial cystitis large cell medulloblastoma lung carcinoma Becker muscular dystrophy malignant mesothelioma muscle tissue disease myocardial infarction osteosarcoma pancreatic intraductal papillary-mucinous carcinoma Ehlers-Danlos syndrome prostate carcinoma Sjogren syndrome gastric carcinoma tuberculosis heart disease juvenile dermatomyositis arthrogryposis malignant ependymoma malignant pancreatic neoplasm breast cancer muscular disease ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia

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.