1CGJ

THREE-DIMENSIONAL STRUCTURE OF THE COMPLEXES BETWEEN BOVINE CHYMOTRYPSINOGEN*A AND TWO RECOMBINANT VARIANTS OF HUMAN PANCREATIC SECRETORY TRYPSIN INHIBITOR (KAZAL-TYPE)

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 [auth I]	d1cgji_	Small proteins	Kazal-type serine protease inhibitors	Kazal-type serine protease inhibitors	Ovomucoid domain III-like	Secretory trypsin inhibitor	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth E]	d1cgje_	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	(alpha,gamma)-chymotrypsin(ogen)	cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth I]	SCOP2B Superfamily	Kazal-type serine protease inhibitors	8038688	3000605	SCOP2B (2022-06-29)
A [auth E]	SCOP2B Superfamily	Trypsin-like serine proteases	8042128	3000114	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 [auth I]	Kazal_1	e1cgjI1	A: few secondary structure elements	X: Kazal-type serine protease inhibitors-like	H: Kazal-type serine protease inhibitors (From Topology)	T: Kazal-type serine protease inhibitors	F: Kazal_1	ECOD (1.6)
A [auth E]	Trypsin_1	e1cgjE1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: Trypsin_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth I]	3.30.60.30	Alpha Beta	2-Layer Sandwich	Wheat Germ Agglutinin (Isolectin 2)	domain 1	CATH (4.3.0)
A [auth E]	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
B [auth I]	PF00050	Kazal-type serine protease inhibitor domain (Kazal_1)	Kazal-type serine protease inhibitor domain	Usually indicative of serine protease inhibitors. However, kazal-like domains are also seen in the extracellular part of agrins, which are not known to be protease inhibitors. Kazal domains often occur in tandem arrays. Small alpha+beta fold containi ...	Usually indicative of serine protease inhibitors. However, kazal-like domains are also seen in the extracellular part of agrins, which are not known to be protease inhibitors. Kazal domains often occur in tandem arrays. Small alpha+beta fold containing three disulphides. Alignment also includes a single domain from transporters in the OATP/PGT family Swiss:P46721.	Domain
A [auth E]	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth I]	PANCREATIC SECRETORY TRYPSIN INHIBITOR (KAZAL TYPE) VARIANT 4	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	positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality regulation of store-operated calcium entry regulation of calcium ion transport regulation of localization regulation of biological process transport regulation of transport regulation of monoatomic ion transport establishment of localization calcium ion transport metal ion transport localization positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality regulation of store-operated calcium entry regulation of calcium ion transport regulation of localization regulation of biological process transport regulation of transport regulation of monoatomic ion transport establishment of localization calcium ion transport metal ion transport localization store-operated calcium entry monoatomic ion transport monoatomic cation transport regulation of metal ion transport developmental process spermatid development spermatid differentiation sexual reproduction cellular developmental process spermatogenesis reproductive process multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism developmental maturation developmental process involved in reproduction gamete generation male gamete generation sperm capacitation anatomical structure maturation cell differentiation anatomical structure development germ cell development cellular process cell maturation regulation of calcium ion import negative regulation of monoatomic ion transport negative regulation of biological process negative regulation of transport negative regulation of calcium ion import negative regulation of calcium ion transport calcium ion import cellular response to stimulus nitric oxide mediated signal transduction regulation of cellular process response to stimulus signaling intracellular signal transduction cell communication intracellular signaling cassette signal transduction negative regulation of signaling negative regulation of intracellular signal transduction regulation of signal transduction negative regulation of cell communication regulation of intracellular signal transduction negative regulation of cellular process regulation of signaling regulation of nitric oxide mediated signal transduction negative regulation of response to stimulus negative regulation of signal transduction regulation of response to stimulus regulation of cell communication negative regulation of nitric oxide mediated signal transduction multicellular organismal process regulation of body fluid levels system process digestive system process regulation of system process positive regulation of biological process positive regulation of secretion positive regulation of digestive system process positive regulation of pancreatic juice secretion regulation of multicellular organismal process secretion by tissue pancreatic juice secretion secretion regulation of pancreatic juice secretion regulation of digestive system process regulation of secretion body fluid secretion digestion positive regulation of transport positive regulation of multicellular organismal process cellular response to nitrogen compound response to endogenous stimulus response to peptide hormone cellular response to peptide hormone stimulus response to oxygen-containing compound response to nitrogen compound cellular response to oxygen-containing compound cellular response to endogenous stimulus cellular response to chemical stimulus response to hormone response to chemical cellular response to hormone stimulus negative regulation of hydrolase activity negative regulation of proteolysis regulation of catalytic activity negative regulation of catalytic activity regulation of primary metabolic process negative regulation of peptidase activity regulation of proteolysis proteolysis protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of protein metabolic process negative regulation of metabolic process negative regulation of molecular function regulation of peptidase activity primary metabolic process regulation of macromolecule metabolic process regulation of molecular function regulation of hydrolase activity metabolic process macromolecule metabolic process regulation of metabolic process response to nutrient levels cell population proliferation positive regulation of cell population proliferation positive regulation of epithelial cell proliferation regulation of cell population proliferation regulation of epithelial cell proliferation epithelial cell proliferation positive regulation of cellular process regulation of reproductive process acrosome reaction fertilization regulation of acrosome reaction single fertilization positive regulation of cell communication nitrogen compound transport regulation of hormone secretion regulation of peptide secretion positive regulation of secretion by cell hormone secretion peptide secretion secretion by cell regulation of secretion by cell positive regulation of hormone secretion amide transport signal release regulation of peptide hormone secretion positive regulation of peptide secretion regulation of hormone levels positive regulation of peptide hormone secretion regulation of peptide transport cell-cell signaling export from cell peptide transport peptide hormone secretion hormone transport positive regulation of signaling response to alcohol response to ethanol	extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle
A [auth E]	ALPHA-CHYMOTRYPSINOGEN	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 protein binding binding serpin family protein 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 cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth I]	IPR036058	Kazal domain superfamily	Homologous Superfamily
B [auth I]	IPR001239	Proteinase inhibitor I1, Kazal-type, metazoa	Family
B [auth I]	IPR002350	Kazal domain	Domain
A [auth E]	IPR001254	Serine proteases, trypsin domain	Domain
A [auth E]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
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
A [auth E]	IPR001314	Peptidase S1A, chymotrypsin family	Family
A [auth E]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth I]	Pharos: P00995	pancreatitis tropical pancreatitis hereditary chronic pancreatitis chronic pancreatitis prostate cancer PANCREATITIS, CHRONIC, PROTECTION AGAINST alcoholic pancreatitis cystic fibrosis malignant colon neoplasm non-small cell lung carcinoma psoriasis tuberculosis Crohn disease esophageal adenocarcinoma interstitial cystitis pancreatitis tropical pancreatitis hereditary chronic pancreatitis chronic pancreatitis prostate cancer PANCREATITIS, CHRONIC, PROTECTION AGAINST alcoholic pancreatitis cystic fibrosis malignant colon neoplasm non-small cell lung carcinoma psoriasis tuberculosis Crohn disease esophageal adenocarcinoma interstitial cystitis pancreatic intraductal papillary-mucinous neoplasm spina bifida ulcerative colitis Barrett esophagus cutaneous lupus erythematosus lung adenocarcinoma malignant pancreatic neoplasm pancreatic neoplasm

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.