2TLD | pdb_00002tld

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
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)
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)

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth I]	SCOP2B Superfamily	Subtilisin inhibitor	8035209	3001859	SCOP2B (2022-06-29)
A [auth E]	SCOP2B Superfamily	Trypsin-like serine proteases	8037496	3000114	SCOP2B (2022-06-29)

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth I]	HSP90	e2tldI1	A: a/b three-layered sandwiches	X: ETN0001 domain-like	H: ETN0001 domain-like	T: Mss4-like	F: HSP90	ECOD (v294.1)
A [auth E]	Trypsin	e2tldE1	A: a/b three-layered sandwiches	X: Phage tail fiber protein trimerization domain	H: LigT-related	T: LigT-related	F: Trypsin	ECOD (v294.1)

Chains	Accession	Name	Description	Comments	Source
A [auth E]	PF00089	Trypsin (Trypsin)	Trypsin		Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
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	-	cellular anatomical structure extracellular region
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	proteolysis metabolic process cellular 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

Chains	Accession	Name	Type
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
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]	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
A [auth E]	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
A [auth E]	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown

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.