8W18

The crystal structure of the Michaelis-Menten complex of a C1s/C1-INH at 3.94 Angstroms

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Trypsin-like serine proteases	8032760	3000114	SCOP2B (2022-06-29)
C [auth A]	SCOP2B Superfamily	Sushi/CCP/SCR domain	8032763	3000902	SCOP2B (2022-06-29)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth I]	PF00079	Serpin (serine protease inhibitor) (Serpin)	Serpin (serine protease inhibitor)	Structure is a multi-domain fold containing a bundle of helices and a beta sandwich.	Domain
B	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain
C [auth A]	PF00084	Sushi repeat (SCR repeat) (Sushi)	Sushi repeat (SCR repeat)	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth I]	Plasma protease C1 inhibitor	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	multicellular organismal process regulation of body fluid levels wound healing response to stimulus hemostasis biological regulation blood coagulation response to stress coagulation regulation of biological quality response to wounding adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response multicellular organismal process regulation of body fluid levels wound healing response to stimulus hemostasis biological regulation blood coagulation response to stress coagulation regulation of biological quality response to wounding adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process immune response immunoglobulin mediated immune response adaptive immune response immune effector process regulation of response to stimulus immune system process B cell mediated immunity regulation of immune response activation of immune response regulation of humoral immune response regulation of immune effector process negative regulation of biological process response to biotic stimulus complement activation, lectin pathway response to other organism negative regulation of immune response regulation of innate immune response negative regulation of immune effector process negative regulation of humoral immune response response to external stimulus defense response to other organism negative regulation of response to external stimulus negative regulation of defense response regulation of complement activation regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus negative regulation of response to biotic stimulus negative regulation of complement activation regulation of response to stress innate immune response response to external biotic stimulus regulation of complement activation, lectin pathway negative regulation of response to stimulus defense response defense response to symbiont negative regulation of immune system process negative regulation of complement activation, lectin pathway negative regulation of innate immune response regulation of response to wounding regulation of coagulation regulation of multicellular organismal process regulation of hemostasis negative regulation of wound healing regulation of blood coagulation negative regulation of blood coagulation negative regulation of response to wounding negative regulation of hemostasis fibrinolysis negative regulation of coagulation regulation of wound healing negative regulation of multicellular organismal process system process circulatory system process blood circulation	extracellular region extracellular space cellular anatomical entity blood microparticle membrane-bounded organelle intracellular anatomical structure membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen endoplasmic reticulum lumen intracellular organelle organelle lumen organelle extracellular region extracellular space cellular anatomical entity blood microparticle membrane-bounded organelle intracellular anatomical structure membrane-enclosed lumen intracellular membrane-bounded organelle endomembrane system intracellular organelle lumen endoplasmic reticulum lumen intracellular organelle organelle lumen organelle endoplasmic reticulum cytoplasm extracellular exosome extracellular vesicle extracellular organelle vesicle extracellular membrane-bounded organelle cell periphery extracellular matrix external encapsulating structure collagen-containing extracellular matrix vesicle lumen intracellular vesicle cytoplasmic vesicle lumen secretory granule lumen cytoplasmic vesicle secretory granule secretory vesicle platelet alpha granule platelet alpha granule lumen
B	Complement C1s subcomponent light chain	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 identical protein binding protein binding	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process immune response biological regulation immunoglobulin mediated immune response adaptive immune response immune effector process regulation of response to stimulus immune system process B cell mediated immunity regulation of immune response activation of immune response biological process involved in interspecies interaction between organisms response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to other organism response to stress innate immune response response to external biotic stimulus organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region extracellular space cellular anatomical entity blood microparticle
C [auth A]	Complement C1s subcomponent heavy chain	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 cation binding ion binding binding calcium ion binding metal ion binding small molecule binding 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 identical protein binding protein binding	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response response to stimulus positive regulation of biological process positive regulation of response to stimulus complement activation humoral immune response mediated by circulating immunoglobulin positive regulation of immune response leukocyte mediated immunity regulation of immune system process positive regulation of immune system process complement activation, classical pathway regulation of biological process immune response biological regulation immunoglobulin mediated immune response adaptive immune response immune effector process regulation of response to stimulus immune system process B cell mediated immunity regulation of immune response activation of immune response biological process involved in interspecies interaction between organisms response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus defense response to other organism response to stress innate immune response response to external biotic stimulus organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region extracellular space cellular anatomical entity blood microparticle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth I]	IPR023795	Serpin, conserved site	Conserved Site
A [auth I]	IPR000215	Serpin family	Family
A [auth I]	IPR023796	Serpin domain	Domain
A [auth I]	IPR042178	Serpin superfamily, domain 1	Homologous Superfamily
A [auth I]	IPR042185	Serpin superfamily, domain 2	Homologous Superfamily
A [auth I]	IPR036186	Serpin superfamily	Homologous Superfamily
B	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
B	IPR018097	EGF-like calcium-binding, conserved site	Conserved Site
B	IPR001314	Peptidase S1A, chymotrypsin family	Family
B	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
B	IPR035914	Spermadhesin, CUB domain superfamily	Homologous Superfamily
B	IPR001254	Serine proteases, trypsin domain	Domain
B	IPR001881	EGF-like calcium-binding domain	Domain
B	IPR000436	Sushi/SCR/CCP domain	Domain
B	IPR000859	CUB domain	Domain
B	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
B	IPR000152	EGF-type aspartate/asparagine hydroxylation site	PTM
B	IPR024175	Peptidase S1A, complement C1r/C1S/mannan-binding	Family
B	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily
C [auth A]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
C [auth A]	IPR018097	EGF-like calcium-binding, conserved site	Conserved Site
C [auth A]	IPR001314	Peptidase S1A, chymotrypsin family	Family
C [auth A]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
C [auth A]	IPR035914	Spermadhesin, CUB domain superfamily	Homologous Superfamily
C [auth A]	IPR001254	Serine proteases, trypsin domain	Domain
C [auth A]	IPR001881	EGF-like calcium-binding domain	Domain
C [auth A]	IPR000436	Sushi/SCR/CCP domain	Domain
C [auth A]	IPR000859	CUB domain	Domain
C [auth A]	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
C [auth A]	IPR000152	EGF-type aspartate/asparagine hydroxylation site	PTM
C [auth A]	IPR024175	Peptidase S1A, complement C1r/C1S/mannan-binding	Family
C [auth A]	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth I]	Pharos: P05155	hereditary angioedema C1 inhibitor deficiency acquired angioedema influenza lupus nephritis cirrhosis of liver Hereditary Angioedema Types I and II angioedema non-small cell lung carcinoma ductal breast carcinoma in situ pancreatic intraductal papillary-mucinous carcinoma pilocytic astrocytoma hereditary angioedema type 2 primitive neuroectodermal tumor hereditary angioedema with C1Inh deficiency hereditary angioedema C1 inhibitor deficiency acquired angioedema influenza lupus nephritis cirrhosis of liver Hereditary Angioedema Types I and II angioedema non-small cell lung carcinoma ductal breast carcinoma in situ pancreatic intraductal papillary-mucinous carcinoma pilocytic astrocytoma hereditary angioedema type 2 primitive neuroectodermal tumor hereditary angioedema with C1Inh deficiency subependymal giant cell astrocytoma ulcerative colitis atypical teratoid rhabdoid tumor limb-girdle muscular dystrophy breast carcinoma lung cancer malignant mesothelioma dermatomyositis multiple sclerosis drug-induced liver injury ovarian cancer Emery-Dreifuss muscular dystrophy gastric carcinoma pancreatic intraductal papillary-mucinous neoplasm pituitary cancer psoriasis systemic lupus erythematosus adrenal cortex carcinoma invasive ductal breast carcinoma urticaria autism spectrum disorder lung adenocarcinoma breast fibroadenoma lung carcinoma malignant ependymoma myopathy Duchenne muscular dystrophy pancreatic ductal adenocarcinoma endogenous depression glioblastoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia polycystic ovary syndrome sarcoidosis tuberculosis juvenile dermatomyositis breast cancer lung benign neoplasm chronic kidney disease malignant glioma cystic fibrosis medulloblastoma
B	Pharos: P09871	complement component C1s deficiency Ehlers-Danlos syndrome Hashimoto thyroiditis autoimmune hepatitis autoimmune disease Ehlers-Danlos syndrome, periodontal type 2 Hereditary Angioedema Types I and II esophageal adenocarcinoma subependymal giant cell astrocytoma hereditary angioedema type 2 invasive ductal breast carcinoma limb-girdle muscular dystrophy adrenal cortex carcinoma malignant colon neoplasm malignant mesothelioma complement component C1s deficiency Ehlers-Danlos syndrome Hashimoto thyroiditis autoimmune hepatitis autoimmune disease Ehlers-Danlos syndrome, periodontal type 2 Hereditary Angioedema Types I and II esophageal adenocarcinoma subependymal giant cell astrocytoma hereditary angioedema type 2 invasive ductal breast carcinoma limb-girdle muscular dystrophy adrenal cortex carcinoma malignant colon neoplasm malignant mesothelioma chronic kidney disease myopathy pancreatic ductal adenocarcinoma diabetes mellitus Ehlers-Danlos syndrome, periodontal type 1 pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia psoriasis gastric carcinoma ulcerative colitis head and neck cancer juvenile dermatomyositis lung cancer angioedema malignant ependymoma malignant pancreatic neoplasm chronic obstructive pulmonary disease non-small cell lung carcinoma cystic fibrosis pancreatic intraductal papillary-mucinous carcinoma Duchenne muscular dystrophy pilocytic astrocytoma Emery-Dreifuss muscular dystrophy Sjogren syndrome glioblastoma heart disease large cell medulloblastoma lung carcinoma atopic eczema malignant glioma Becker muscular dystrophy medulloblastoma ovarian cancer dermatomyositis pancreatic intraductal papillary-mucinous neoplasm pituitary cancer
C [auth A]	Pharos: P09871	complement component C1s deficiency Ehlers-Danlos syndrome Hashimoto thyroiditis autoimmune hepatitis autoimmune disease Ehlers-Danlos syndrome, periodontal type 2 Hereditary Angioedema Types I and II esophageal adenocarcinoma subependymal giant cell astrocytoma hereditary angioedema type 2 invasive ductal breast carcinoma limb-girdle muscular dystrophy adrenal cortex carcinoma malignant colon neoplasm malignant mesothelioma complement component C1s deficiency Ehlers-Danlos syndrome Hashimoto thyroiditis autoimmune hepatitis autoimmune disease Ehlers-Danlos syndrome, periodontal type 2 Hereditary Angioedema Types I and II esophageal adenocarcinoma subependymal giant cell astrocytoma hereditary angioedema type 2 invasive ductal breast carcinoma limb-girdle muscular dystrophy adrenal cortex carcinoma malignant colon neoplasm malignant mesothelioma chronic kidney disease myopathy pancreatic ductal adenocarcinoma diabetes mellitus Ehlers-Danlos syndrome, periodontal type 1 pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia psoriasis gastric carcinoma ulcerative colitis head and neck cancer juvenile dermatomyositis lung cancer angioedema malignant ependymoma malignant pancreatic neoplasm chronic obstructive pulmonary disease non-small cell lung carcinoma cystic fibrosis pancreatic intraductal papillary-mucinous carcinoma Duchenne muscular dystrophy pilocytic astrocytoma Emery-Dreifuss muscular dystrophy Sjogren syndrome glioblastoma heart disease large cell medulloblastoma lung carcinoma atopic eczema malignant glioma Becker muscular dystrophy medulloblastoma ovarian cancer dermatomyositis pancreatic intraductal papillary-mucinous neoplasm pituitary cancer