2TLD

CRYSTAL STRUCTURE OF AN ENGINEERED SUBTILISIN INHIBITOR COMPLEXED WITH BOVINE TRYPSIN

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth E]	d2tlde_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B [auth I]	d2tldi_	Alpha and beta proteins (a+b)	Subtilisin inhibitor	Subtilisin inhibitor	Subtilisin inhibitor	Subtilisin inhibitor	(Streptomyces albogriseolus ) [TaxId: 1887 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth E]	SCOP2B Superfamily	Trypsin-like serine proteases	8037496	3000114	SCOP2B (2022-06-29)
B [auth I]	SCOP2B Superfamily	Subtilisin inhibitor	8035209	3001859	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 E]	Trypsin_1	e2tldE1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)
B [auth I]	SSI	e2tldI1	A: a+b two layers	X: Subtilisin inhibitor (From Topology)	H: Subtilisin inhibitor (From Topology)	T: Subtilisin inhibitor	F: SSI	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth E]	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain
B [auth I]	PF00720	Subtilisin inhibitor-like (SSI)	Subtilisin inhibitor-like	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E]	TRYPSIN	peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity endopeptidase activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity protein binding binding serpin family protein binding cation binding ion binding metal ion binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity endopeptidase activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity protein binding binding serpin family protein binding cation binding ion binding metal ion binding small molecule binding	organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process multicellular organismal process digestion	protein-containing complex serine protease inhibitor complex protease inhibitor complex peptidase inhibitor complex extracellular region extracellular space cellular anatomical entity
B [auth I]	STREPTOMYCES SUBTILISIN INHIBITOR (SSI)	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	-	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A [auth E]	IPR001314	Peptidase S1A, chymotrypsin family	Family
A [auth E]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
A [auth E]	IPR001254	Serine proteases, trypsin domain	Domain
A [auth E]	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A [auth E]	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
B [auth I]	IPR036819	Subtilisin inhibitor-like superfamily	Homologous Superfamily
B [auth I]	IPR000691	Proteinase inhibitor I16, Streptomyces subtilisin-type inhibitor	Family
B [auth I]	IPR020054	Proteinase inhibitor I16, Streptomyces subtilisin-type inhibitor, conserved site	Conserved Site
B [auth I]	IPR023549	Subtilisin inhibitor	Domain

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.