Annotations: 4H4F

Crystal structure of human chymotrypsin C (CTRC) bound to inhibitor eglin c from Hirudo medicinalis

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-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d4h4fb_	Alpha and beta proteins (a+b)	CI-2 family of serine protease inhibitors	CI-2 family of serine protease inhibitors	CI-2 family of serine protease inhibitors	automated matches	Medicinal leech (Hirudo medicinalis ) [TaxId: 6421 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	CI-2 serine protease inhibitor-like	8034986	3000827	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)
B	Porphobil_deamC	e4h4fB1	A: beta barrels	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Porphobil_deamC	ECOD (v294.2)
A	Porphobil_deamC	e4h4fA1	A: beta barrels	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Porphobil_deamC	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.10.10	Alpha Beta	2-Layer Sandwich	Trypsin Inhibitor V	Chain A	CATH (4.3.0)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth Q]	Chymotrypsin-C	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity	inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis proteolysis metabolic process cellular process inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	-
B	Eglin C	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	response to stimulus response to stress response to wounding	-
A	Chymotrypsin-C	peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity	inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis proteolysis metabolic process cellular process inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth Q]	IPR001254	Serine proteases, trypsin domain	Domain
C [auth Q]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
C [auth Q]	IPR050850	Peptidase S1 family, Elastase subfamily	Family
C [auth Q]	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
C [auth Q]	IPR001314	Peptidase S1A, chymotrypsin family	Family
C [auth Q]	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown
C [auth Q]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
B	IPR000864	Proteinase inhibitor I13, potato inhibitor I	Family
B	IPR036354	Proteinase inhibitor I13, potato inhibitor I superfamily	Homologous Superfamily
A	IPR001254	Serine proteases, trypsin domain	Domain
A	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A	IPR050850	Peptidase S1 family, Elastase subfamily	Family
A	IPR018114	Serine proteases, trypsin family, histidine active site	Active Site
A	IPR001314	Peptidase S1A, chymotrypsin family	Family
A	IPR043504	Peptidase_S1_PA_chymotrypsin	Unknown
A	IPR033116	Serine proteases, trypsin family, serine active site	Active Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth Q]	: Q99895	hereditary chronic pancreatitis pancreatitis tropical pancreatitis chronic pancreatitis alcoholic pancreatitis pancreatic intraductal papillary-mucinous carcinoma PANCREATITIS, CHRONIC, SUSCEPTIBILITY TO pancreatic intraductal papillary-mucinous neoplasm malignant pancreatic neoplasm pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia
A	: Q99895	hereditary chronic pancreatitis pancreatitis tropical pancreatitis chronic pancreatitis alcoholic pancreatitis pancreatic intraductal papillary-mucinous carcinoma PANCREATITIS, CHRONIC, SUSCEPTIBILITY TO pancreatic intraductal papillary-mucinous neoplasm malignant pancreatic neoplasm pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia

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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.