7PQN

Catalytic fragment of MASP-2 in complex with ecotin

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD 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)
A [auth C]	SCOP2B Superfamily	Ecotin trypsin inhibitor	8041127	3001256	SCOP2B (2022-06-29)
B [auth D]	SCOP2B Superfamily	Ecotin trypsin inhibitor	8041127	3001256	SCOP2B (2022-06-29)
C [auth A]	SCOP2B Superfamily	Sushi/CCP/SCR domain	8035759	3000902	SCOP2B (2022-06-29)
E [auth aa]	SCOP2B Superfamily	Sushi/CCP/SCR domain	8035759	3000902	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	Trypsin-like serine proteases	8035755	3000114	SCOP2B (2022-06-29)
F [auth bb]	SCOP2B Superfamily	Trypsin-like serine proteases	8035755	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 [auth C]	PF03974	e7pqnC1	A: beta sandwiches	X: Ecotin, trypsin inhibitor (From Topology)	H: Ecotin, trypsin inhibitor (From Topology)	T: Ecotin, trypsin inhibitor	F: PF03974	ECOD (1.6)
B [auth D]	PF03974	e7pqnD1	A: beta sandwiches	X: Ecotin, trypsin inhibitor (From Topology)	H: Ecotin, trypsin inhibitor (From Topology)	T: Ecotin, trypsin inhibitor	F: PF03974	ECOD (1.6)
C [auth A]	PF00084	e7pqnA1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: PF00084	ECOD (1.6)
E [auth aa]	PF00084	e7pqnaa1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: PF00084	ECOD (1.6)
D [auth B]	PF00089	e7pqnB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: PF00089	ECOD (1.6)
F [auth bb]	PF00089	e7pqnbb1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel 2	F: PF00089	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth C], B [auth D]	PF03974	Ecotin (Ecotin)	Ecotin	-	Family
C [auth A], E [auth aa]	PF00084	Sushi repeat (SCR repeat) (Sushi)	Sushi repeat (SCR repeat)	-	Domain
D [auth B], F [auth bb]	PF00089	Trypsin (Trypsin)	Trypsin	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C], B [auth D]	Ecotin	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 identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	-	outer membrane-bounded periplasmic space cell envelope periplasmic space cellular anatomical entity
C [auth A], E [auth aa]	Mannan-binding lectin serine protease 2 A chain	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding opsonin binding protein binding complement component C4b binding complement binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding opsonin binding protein binding complement component C4b binding complement binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity endopeptidase activity calcium-dependent protein binding identical 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 biotic stimulus response to stress innate immune response response to external biotic stimulus complement activation, lectin pathway response to other organism defense response defense response to symbiont response to external stimulus defense response to other organism organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic 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
D [auth B], F [auth bb]	Mannan-binding lectin serine protease 2 B chain	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding opsonin binding protein binding complement component C4b binding complement binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity cation binding ion binding binding calcium ion binding metal ion binding small molecule binding opsonin binding protein binding complement component C4b binding complement binding peptidase activity catalytic activity, acting on a protein hydrolase activity catalytic activity serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity endopeptidase activity calcium-dependent protein binding identical 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 biotic stimulus response to stress innate immune response response to external biotic stimulus complement activation, lectin pathway response to other organism defense response defense response to symbiont response to external stimulus defense response to other organism organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic 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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C], B [auth D]	IPR005658	Proteinase inhibitor I11, ecotin	Family
A [auth C], B [auth D]	IPR036198	Ecotin superfamily	Homologous Superfamily
A [auth C], B [auth D]	IPR023084	Proteinase inhibitor I11, ecotin, gammaproteobacteria	Family
A [auth C], B [auth D]	IPR027438	Ecotin, C-terminal	Homologous Superfamily
C [auth A], E [auth aa]	IPR018097	EGF-like calcium-binding, conserved site	Conserved Site
C [auth A], E [auth aa]	IPR035914	Spermadhesin, CUB domain superfamily	Homologous Superfamily
C [auth A], E [auth aa]	IPR000436	Sushi/SCR/CCP domain	Domain
C [auth A], E [auth aa]	IPR000859	CUB domain	Domain
C [auth A], E [auth aa]	IPR000742	EGF-like domain	Domain
C [auth A], E [auth aa]	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily
C [auth A], E [auth aa]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
C [auth A], E [auth aa]	IPR001314	Peptidase S1A, chymotrypsin family	Family
C [auth A], E [auth aa]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
C [auth A], E [auth aa]	IPR001254	Serine proteases, trypsin domain	Domain
C [auth A], E [auth aa]	IPR001881	EGF-like calcium-binding domain	Domain
C [auth A], E [auth aa]	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
C [auth A], E [auth aa]	IPR000152	EGF-type aspartate/asparagine hydroxylation site	PTM
C [auth A], E [auth aa]	IPR024175	Peptidase S1A, complement C1r/C1S/mannan-binding	Family
D [auth B], F [auth bb]	IPR018097	EGF-like calcium-binding, conserved site	Conserved Site
D [auth B], F [auth bb]	IPR035914	Spermadhesin, CUB domain superfamily	Homologous Superfamily
D [auth B], F [auth bb]	IPR000436	Sushi/SCR/CCP domain	Domain
D [auth B], F [auth bb]	IPR000859	CUB domain	Domain
D [auth B], F [auth bb]	IPR000742	EGF-like domain	Domain
D [auth B], F [auth bb]	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily
D [auth B], F [auth bb]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
D [auth B], F [auth bb]	IPR001314	Peptidase S1A, chymotrypsin family	Family
D [auth B], F [auth bb]	IPR033116	Serine proteases, trypsin family, serine active site	Active Site
D [auth B], F [auth bb]	IPR001254	Serine proteases, trypsin domain	Domain
D [auth B], F [auth bb]	IPR001881	EGF-like calcium-binding domain	Domain
D [auth B], F [auth bb]	IPR043504	Peptidase S1, PA clan, chymotrypsin-like fold	Homologous Superfamily
D [auth B], F [auth bb]	IPR000152	EGF-type aspartate/asparagine hydroxylation site	PTM
D [auth B], F [auth bb]	IPR024175	Peptidase S1A, complement C1r/C1S/mannan-binding	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth A], E [auth aa]	Pharos: O00187	immunodeficiency due to MASP-2 deficiency ulcerative colitis type III hypersensitivity disease erythema multiforme streptococcal pneumonia Inflammation androgenetic alopecia Ewing sarcoma lung cancer breast cancer pancreatic ductal adenocarcinoma psoriasis
D [auth B], F [auth bb]	Pharos: O00187	immunodeficiency due to MASP-2 deficiency ulcerative colitis type III hypersensitivity disease erythema multiforme streptococcal pneumonia Inflammation androgenetic alopecia Ewing sarcoma lung cancer breast cancer pancreatic ductal adenocarcinoma psoriasis