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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
A [auth B]d4islb_ Small proteins BPTI-like BPTI-like automated matches automated matches human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
B [auth A]d4isla_ All beta proteins Trypsin-like serine proteases Trypsin-like serine proteases Eukaryotic proteases Matriptase MTSP1 human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
A [auth B]SCOP2 FamilySmall Kunitz-type inhibitors & BPTI-like toxins 8070120 4003337 SCOP2 (2022-06-29)
A [auth B]SCOP2 SuperfamilyBPTI-like 8070121 3000628 SCOP2 (2022-06-29)
B [auth A]SCOP2B SuperfamilyTrypsin-like serine proteases 8035635 3000114 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
A [auth B]Kunitz_BPTIe4islB1 A: few secondary structure elementsX: BPTI-like (From Topology)H: BPTI-like (From Topology)T: BPTI-likeF: Kunitz_BPTIECOD (1.6)
B [auth A]Trypsin_1e4islA2 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: Trypsin_1ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A [auth B]4.10.410.10 Few Secondary Structures Irregular Factor Xa Inhibitor Pancreatic trypsin inhibitor Kunitz domainCATH (4.3.0)
B [auth A]2.40.10.10 Mainly Beta Beta Barrel Thrombin, subunit H Trypsin-like serine proteasesCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A [auth B]PF00014Kunitz/Bovine pancreatic trypsin inhibitor domain (Kunitz_BPTI)Kunitz/Bovine pancreatic trypsin inhibitor domainIndicative 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
B [auth A]PF00089Trypsin (Trypsin)Trypsin- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A [auth B]Kunitz-type protease inhibitor 1
B [auth A]Suppressor of tumorigenicity 14 protein

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
A [auth B]IPR002172Low-density lipoprotein (LDL) receptor class A repeatRepeat
A [auth B]IPR002223Pancreatic trypsin inhibitor Kunitz domainDomain
A [auth B]IPR036055LDL receptor-like superfamilyHomologous Superfamily
A [auth B]IPR011106Seven cysteines, N-terminalDomain
A [auth B]IPR020901Proteinase inhibitor I2, Kunitz, conserved siteConserved Site
A [auth B]IPR036880Pancreatic trypsin inhibitor Kunitz domain superfamilyHomologous Superfamily
A [auth B]IPR013783Immunoglobulin-like foldHomologous Superfamily
A [auth B]IPR023415Low-density lipoprotein (LDL) receptor class A, conserved siteConserved Site
A [auth B]IPR013980MANSC domainDomain
B [auth A]IPR002172Low-density lipoprotein (LDL) receptor class A repeatRepeat
B [auth A]IPR009003Peptidase S1, PA clanHomologous Superfamily
B [auth A]IPR017051Peptidase S1A, matripaseFamily
B [auth A]IPR033116Serine proteases, trypsin family, serine active siteActive Site
B [auth A]IPR035914Spermadhesin, CUB domain superfamilyHomologous Superfamily
B [auth A]IPR001254Serine proteases, trypsin domainDomain
B [auth A]IPR023415Low-density lipoprotein (LDL) receptor class A, conserved siteConserved Site
B [auth A]IPR036055LDL receptor-like superfamilyHomologous Superfamily
B [auth A]IPR036364SEA domain superfamilyHomologous Superfamily
B [auth A]IPR000859CUB domainDomain
B [auth A]IPR000082SEA domainDomain
B [auth A]IPR043504Peptidase S1, PA clan, chymotrypsin-like foldHomologous Superfamily
B [auth A]IPR018114Serine proteases, trypsin family, histidine active siteActive Site