Annotations: 7Q61

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	e7q61A5	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	e7q61A8	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	e7q61A2	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	e7q61A7	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	e7q61A1	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	e7q61A4	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	e7q61A6	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	e7q61A3	A: alpha superhelices	X: Repetitive alpha hairpins	H: alpha/alpha toroid (From Topology)	T: alpha/alpha toroid	F: A2M_comp_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.1940	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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	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	PF00207	Alpha-2-macroglobulin family (A2M)	Alpha-2-macroglobulin family	-	Family
A	PF07678	A-macroglobulin TED domain (TED_complement)	A-macroglobulin TED domain	-	Repeat
A	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	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	Alpha-2-macroglobulin-like protein 1	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	regulation of biological process regulation of cellular process regulation of catalytic activity regulation of protein metabolic process regulation of peptidase activity biological regulation primary metabolic process regulation of macromolecule metabolic process regulation of primary metabolic process regulation of molecular function regulation of proteolysis proteolysis regulation of hydrolase activity regulation of endopeptidase activity regulation of biological process regulation of cellular process regulation of catalytic activity regulation of protein metabolic process regulation of peptidase activity biological regulation primary metabolic process regulation of macromolecule metabolic process regulation of primary metabolic process regulation of molecular function regulation of proteolysis proteolysis regulation of hydrolase activity regulation of endopeptidase activity metabolic process cellular process protein metabolic process macromolecule metabolic process regulation of metabolic process	extracellular exosome membrane-bounded organelle extracellular vesicle cellular anatomical structure extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: A8K2U0	Noonan syndrome otitis media astrocytic tumor malignant ependymoma cystic fibrosis non-small cell lung carcinoma psoriasis intellectual disability spina bifida

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.