2QYI | pdb_00002qyi

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D	d2qyid_	All beta proteins	beta-Trefoil	STI-like	Kunitz (STI) inhibitors	chymotrypsin inhibitor WCI	Goa bean (Psophocarpus tetragonolobus ) [TaxId: 3891 ],	SCOPe (2.08)
B	d2qyib_	All beta proteins	beta-Trefoil	STI-like	Kunitz (STI) inhibitors	chymotrypsin inhibitor WCI	Goa bean (Psophocarpus tetragonolobus ) [TaxId: 3891 ],	SCOPe (2.08)
C	d2qyic_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	bovine (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
A	d2qyia_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Trypsin(ogen)	bovine (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	STI-like	8042035	3000715	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	STI-like	8042035	3000715	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Trypsin-like serine proteases	8037496	3000114	SCOP2B (2022-06-29)
A	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)
D	DUF1684	e2qyiD1	A: alpha arrays	X: Lipocalins/Streptavidin	H: SH3	T: Transmembrane protein 14A	F: DUF1684	ECOD (v295)
B	DUF1684	e2qyiB1	A: alpha arrays	X: Lipocalins/Streptavidin	H: SH3	T: Transmembrane protein 14A	F: DUF1684	ECOD (v295)
C	Trypsin	e2qyiC1	A: alpha arrays	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: Trypsin	ECOD (v295)
A	Trypsin	e2qyiA1	A: alpha arrays	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: Trypsin	ECOD (v295)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)
B	2.80.10.50	Mainly Beta	Trefoil	Trefoil (Acidic Fibroblast Growth Factor, subunit A)		CATH (4.3.0)
C	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A, C	PF00089	Trypsin (Trypsin)	Trypsin		Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D	Chymotrypsin inhibitor 3	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	-	-
A, C	Cationic 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, D	IPR002160	Proteinase inhibitor I3, Kunitz legume	Family
B, D	IPR011065	Kunitz inhibitor STI-like superfamily	Homologous Superfamily
A, C	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A, C	IPR001314	Peptidase S1A, chymotrypsin family	Family
A, C	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
A, C	IPR001254	Serine proteases, trypsin domain	Domain
A, C	IPR018114	Serine protease-like, trypsin family, histidine active site	Active Site
A, C	IPR050127	Serine Proteases (Peptidase S1 Family)	Family
A, C	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.