Annotations: 7O7S

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	alpha-macroglobulin receptor domain	8040212	3000742	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	A2M_N_1	e7o7sA6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_1	ECOD (1.6)
A	MG4	e7o7sA3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: MG4	ECOD (1.6)
A	KOG1366_1st	e7o7sA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_1st	ECOD (1.6)
A	KOG1366_2nd	e7o7sA7	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_2nd	ECOD (1.6)
A	A2M_C	e7o7sA4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_C	ECOD (1.6)
A	A2M_N	e7o7sA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N	ECOD (1.6)
A	A2M_N_2	e7o7sA5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_2	ECOD (1.6)
A	A2M_comp_1	e7o7sA8	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: A2M_comp_1	ECOD (1.6)
B	A2M_N_1	e7o7sB2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_1	ECOD (1.6)
B	MG4	e7o7sB5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: MG4	ECOD (1.6)
B	KOG1366_1st	e7o7sB7	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_1st	ECOD (1.6)
B	KOG1366_2nd	e7o7sB8	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_2nd	ECOD (1.6)
B	A2M_C	e7o7sB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_C	ECOD (1.6)
B	A2M_N	e7o7sB3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N	ECOD (1.6)
B	A2M_N_2	e7o7sB6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_2	ECOD (1.6)
B	A2M_comp_1	e7o7sB4	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: A2M_comp_1	ECOD (1.6)
C	A2M_N_1	e7o7sC2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_1	ECOD (1.6)
C	MG4	e7o7sC5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: MG4	ECOD (1.6)
C	KOG1366_1st	e7o7sC4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_1st	ECOD (1.6)
C	KOG1366_2nd	e7o7sC6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_2nd	ECOD (1.6)
C	A2M_C	e7o7sC1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_C	ECOD (1.6)
C	A2M_N	e7o7sC8	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N	ECOD (1.6)
C	A2M_N_2	e7o7sC7	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_2	ECOD (1.6)
C	A2M_comp_1	e7o7sC3	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: A2M_comp_1	ECOD (1.6)
D	A2M_N_1	e7o7sD1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_1	ECOD (1.6)
D	MG4	e7o7sD5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: MG4	ECOD (1.6)
D	KOG1366_1st	e7o7sD4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_1st	ECOD (1.6)
D	KOG1366_2nd	e7o7sD7	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: KOG1366_2nd	ECOD (1.6)
D	A2M_C	e7o7sD2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_C	ECOD (1.6)
D	A2M_N	e7o7sD3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N	ECOD (1.6)
D	A2M_N_2	e7o7sD8	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: A2M_N_2	ECOD (1.6)
D	A2M_recep	e7o7sD6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: A2M_recep	ECOD (1.6)
D	A2M_comp_1	e7o7sD9	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: A2M_comp_1	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF17791	Macroglobulin domain MG3 (MG3)	Macroglobulin domain MG3	This entry corresponds to the MG3 domain found in complement components C3, C4 and C5.	Domain
A, B, C, D	PF01835	MG2 domain (MG2)	MG2 domain	This is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. How ...	This is the MG2 (macroglobulin) domain of alpha-2-macroglobulin in eukaryotes [1]. Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain is termed macroglobulin-like (MG) domain 2 and in Salmonella enterica ser A2Ms, this is domain 4 [2] [3].	Domain
A, B, C, D	PF00207	Alpha-2-macroglobulin family (A2M)	Alpha-2-macroglobulin family	-	Family
A, B, C, D	PF07678	A-macroglobulin TED domain (TED_complement)	A-macroglobulin TED domain	-	Repeat
A, B, C, D	PF07677	A-macroglobulin receptor binding domain (A2M_recep)	A-macroglobulin receptor binding domain	This family includes the receptor binding domain region of the alpha-2-macroglobulin family.	Domain
A, B, C, D	PF07703	Alpha-2-macroglobulin bait region domain (A2M_BRD)	Alpha-2-macroglobulin bait region domain	Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and spe ...	Alpha-2-macroglobulins (A2Ms) are plasma proteins that trap and inhibit a broad range of proteases and are major components of the eukaryotic innate immune system. However, A2M-like proteins were identified in pathogenically invasive bacteria and species that colonize higher eukaryotes. This domain is found in eukaryotic and bacterial proteins. In human A2Ms, this domain encompasses macroglobulin-like domain MG5 and 6 including bait region. In Salmonella enterica ser A2Ms, this domain encompasses MG7 and MG8 including the bait region [1] [2]. The Bait region is cleaved by proteases, followed by a large conformational change that blocks the target protease within a cage-like complex. This model of protease entrapment is recognised as the Venus flytrap mechanism [1].	Domain
A, B, C, D	PF17789	Macroglobulin domain MG4 (MG4)	Macroglobulin domain MG4	This domain is MG4 found in complement C3 and C5 proteins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Alpha-2-macroglobulin	protein binding binding signaling receptor binding enzyme binding protease binding interleukin-1 binding growth factor binding cytokine binding enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity protein binding binding signaling receptor binding enzyme binding protease binding interleukin-1 binding growth factor binding cytokine binding enzyme regulator activity molecular function inhibitor activity peptidase regulator activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity chemokine binding C-X-C chemokine binding interleukin-8 binding serine-type endopeptidase inhibitor activity tumor necrosis factor binding calcium-dependent protein binding	regulation of humoral immune response regulation of immune effector process response to stimulus negative regulation of biological process response to biotic stimulus complement activation positive regulation of immune response regulation of immune system process positive regulation of immune system process complement activation, lectin pathway regulation of biological process immune response response to other organism negative regulation of immune response regulation of humoral immune response regulation of immune effector process response to stimulus negative regulation of biological process response to biotic stimulus complement activation positive regulation of immune response regulation of immune system process positive regulation of immune system process complement activation, lectin pathway regulation of biological process immune response 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 immune effector process regulation of response to stimulus defense response to other organism negative regulation of response to external stimulus negative regulation of defense response regulation of immune response regulation of complement activation activation of immune response regulation of defense response humoral immune 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 positive regulation of biological process negative regulation of complement activation positive regulation of response to stimulus response to stress 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 biological regulation defense response to symbiont negative regulation of immune system process negative regulation of complement activation, lectin pathway immune system process negative regulation of innate immune response developmental process stem cell differentiation cellular developmental process cell differentiation cellular process	extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle blood microparticle vesicle lumen intracellular anatomical structure intracellular vesicle extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle blood microparticle vesicle lumen intracellular anatomical structure intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen intracellular membrane-bounded organelle secretory granule lumen endomembrane system intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen secretory granule secretory vesicle cytoplasm platelet alpha granule platelet alpha granule lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR019742	Alpha-2-macroglobulin, conserved site	Conserved Site
A, B, C, D	IPR009048	Alpha-macroglobulin, receptor-binding	Domain
A, B, C, D	IPR041555	Macroglobulin domain MG3	Domain
A, B, C, D	IPR001599	Alpha-2-macroglobulin	Domain
A, B, C, D	IPR047565	Alpha-macroglobulin-like, thiol-ester bond-forming region	Conserved Site
A, B, C, D	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A, B, C, D	IPR041813	Alpha-2-macroglobulin, TED domain	Domain
A, B, C, D	IPR011625	Alpha-2-macroglobulin, bait region domain	Domain
A, B, C, D	IPR011626	Alpha-macroglobulin-like, TED domain	Domain
A, B, C, D	IPR010916	TonB box, conserved site	Conserved Site
A, B, C, D	IPR036595	Alpha-macroglobulin, receptor-binding domain superfamily	Homologous Superfamily
A, B, C, D	IPR002890	Macroglobulin domain	Domain
A, B, C, D	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B, C, D	IPR050473	Alpha-2-macroglobulin/Complement system	Family
A, B, C, D	IPR008930	Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid	Homologous Superfamily
A, B, C, D	IPR040839	Macroglobulin domain MG4	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	Pharos: P01023	Alzheimer disease malignant colon neoplasm hepatocellular adenoma Wilson disease nephrotic syndrome Liver Cirrhosis, Experimental alpha-2-macroglobulin deficiency cirrhosis of liver glioblastoma ulcerative colitis hepatocellular carcinoma lung benign neoplasm lung disease Alzheimer disease type 1 benign colon neoplasm Alzheimer disease malignant colon neoplasm hepatocellular adenoma Wilson disease nephrotic syndrome Liver Cirrhosis, Experimental alpha-2-macroglobulin deficiency cirrhosis of liver glioblastoma ulcerative colitis hepatocellular carcinoma lung benign neoplasm lung disease Alzheimer disease type 1 benign colon neoplasm non-small cell lung carcinoma colonic neoplasm pancreatic ductal adenocarcinoma esophageal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia gastric carcinoma pterygium invasive ductal breast carcinoma lung cancer acute kidney failure malignant ependymoma astrocytic tumor breast cancer oligodendroglioma depressive disorder pancreatic intraductal papillary-mucinous carcinoma pilocytic astrocytoma Gaucher disease subependymal giant cell astrocytoma lung adenocarcinoma lung carcinoma malignant glioma Becker muscular dystrophy ovarian cancer Duchenne muscular dystrophy pancreatic intraductal papillary-mucinous neoplasm