1MD8

Monomeric structure of the active catalytic domain of complement protease C1r

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)
A	d1md8a1	All beta proteins	Trypsin-like serine proteases	Trypsin-like serine proteases	Eukaryotic proteases	Complement C1R protease, catalytic domain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1md8a2	Small proteins	Complement control module/SCR domain	Complement control module/SCR domain	Complement control module/SCR domain	Complement C1R protease domains	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Trypsin-like serine proteases	8036493	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)
A	PF00089	e1md8A1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: PF00089	ECOD (1.6)
A	PF00084	e1md8A2	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: PF00084	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.10.10	Mainly Beta	Beta Barrel	Thrombin, subunit H	Trypsin-like serine proteases	CATH (4.3.0)
A	2.10.70.10	Mainly Beta	Ribbon	Complement Module	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00084	Sushi repeat (SCR repeat) (Sushi)	Sushi repeat (SCR repeat)	-	Domain
A	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	C1R COMPLEMENT SERINE PROTEASE	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 molecular sequestering 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 zymogen activation organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process primary metabolic process gene expression macromolecule biosynthetic process protein maturation organic substance metabolic process biosynthetic process proteolysis organic substance biosynthetic process protein processing metabolic process cellular process protein metabolic process macromolecule metabolic process	extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle blood microparticle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR018097	EGF-like calcium-binding, conserved site	Conserved Site
A	IPR035914	Spermadhesin, CUB domain superfamily	Homologous Superfamily
A	IPR000436	Sushi/SCR/CCP domain	Domain
A	IPR000859	CUB domain	Domain
A	IPR000742	EGF-like domain	Domain
A	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily
A	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A	IPR001314	Peptidase S1A, chymotrypsin family	Family
A	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
A	IPR001254	Serine proteases, trypsin domain	Domain
A	IPR001881	EGF-like calcium-binding domain	Domain
A	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
A	IPR024175	Peptidase S1A, complement C1r/C1S/mannan-binding	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P00736	Ehlers-Danlos syndrome cystic fibrosis endometriosis paratuberculosis Ehlers-Danlos syndrome, periodontal type 1 large cell medulloblastoma lung carcinoma malignant ependymoma malignant pancreatic neoplasm ovarian cancer adrenal cortex carcinoma pancreatic intraductal papillary-mucinous neoplasm pilocytic astrocytoma Duchenne muscular dystrophy subependymal giant cell astrocytoma Ehlers-Danlos syndrome cystic fibrosis endometriosis paratuberculosis Ehlers-Danlos syndrome, periodontal type 1 large cell medulloblastoma lung carcinoma malignant ependymoma malignant pancreatic neoplasm ovarian cancer adrenal cortex carcinoma pancreatic intraductal papillary-mucinous neoplasm pilocytic astrocytoma Duchenne muscular dystrophy subependymal giant cell astrocytoma Ehlers-Danlos syndrome, periodontitis type glioblastoma invasive ductal breast carcinoma limb-girdle muscular dystrophy Lupus Erythematosus, Systemic malignant glioma medulloblastoma pancreatic ductal adenocarcinoma Becker muscular dystrophy pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia dermatomyositis pituitary cancer ulcerative colitis facioscapulohumeral muscular dystrophy heart disease juvenile dermatomyositis lung cancer malignant colon neoplasm malignant mesothelioma myopathy pancreatic intraductal papillary-mucinous carcinoma complement component C1r/C1s deficiency diabetes mellitus Sjogren syndrome gastric carcinoma interstitial cystitis

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.