Annotations: 3T5O

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	MACPF-like	8049568	4006548	SCOP2 (2022-06-29)
A	SCOP2 Family	Sushi/CCP/SCR domain	8052108	4003458	SCOP2 (2022-06-29)
A	SCOP2 Family	Sushi/CCP/SCR domain	8052109	4003458	SCOP2 (2022-06-29)
A	SCOP2 Family	FIM domain	8052112	4007585	SCOP2 (2022-06-29)
A	SCOP2 Family	FIM domain	8052113	4007585	SCOP2 (2022-06-29)
A	SCOP2 Family	TSP-1 type 1 repeat	8052116	4003415	SCOP2 (2022-06-29)
A	SCOP2 Family	TSP-1 type 1 repeat	8052117	4003415	SCOP2 (2022-06-29)
A	SCOP2 Family	TSP-1 type 1 repeat	8052118	4003415	SCOP2 (2022-06-29)
A	SCOP2 Family	ASTN-2 EGF-like domain	8052122	4007581	SCOP2 (2022-06-29)
A	SCOP2 Family	LDL receptor-like module	8052132	4003373	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	MAC/CDC-like	8052040	3002081	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sushi/CCP/SCR domain	8052110	3000902	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sushi/CCP/SCR domain	8052111	3000902	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Kazal-type serine protease inhibitors	8052114	3000605	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Kazal-type serine protease inhibitors	8052115	3000605	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	TSP-1 type 1 repeat	8052119	3000814	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	TSP-1 type 1 repeat	8052120	3000814	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	TSP-1 type 1 repeat	8052121	3000814	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	EGF/Laminin-like	8052123	3000412	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	LDL receptor-like module	8052133	3000728	SCOP2 (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	MACPF	e3t5oA4	A: beta complex topology	X: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	H: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains (From Topology)	T: Membrane attack complex/perforin (MACPF) and cholesterol-dependent cytolysin (CDC) domains	F: MACPF	ECOD (1.6)
A	FIMAC_1	e3t5oA10	A: few secondary structure elements	X: Kazal-type serine protease inhibitors-like	H: Kazal-type serine protease inhibitors (From Topology)	T: Kazal-type serine protease inhibitors	F: FIMAC_1	ECOD (1.6)
A	FIMAC_like_2	e3t5oA9	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: EGF/Laminin	F: FIMAC_like_2	ECOD (1.6)
A	FIMAC_like	e3t5oA11	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: EGF/Laminin	F: FIMAC_like	ECOD (1.6)
A	hEGF_like	e3t5oA5	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: EGF/Laminin	F: hEGF_like	ECOD (1.6)
A	Sushi	e3t5oA7	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi	ECOD (1.6)
A	Ldl_recept_a	e3t5oA3	A: few secondary structure elements	X: EGF-like	H: LDL receptor-like module (From Topology)	T: LDL receptor-like module	F: Ldl_recept_a	ECOD (1.6)
A	TSP_1_1	e3t5oA2	A: few secondary structure elements	X: TSP-1 type 1 repeat (From Topology)	H: TSP-1 type 1 repeat (From Topology)	T: TSP-1 type 1 repeat	F: TSP_1_1	ECOD (1.6)
A	TSP_1	e3t5oA1	A: few secondary structure elements	X: TSP-1 type 1 repeat (From Topology)	H: TSP-1 type 1 repeat (From Topology)	T: TSP-1 type 1 repeat	F: TSP_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.20.100.10	Mainly Beta	Single Sheet	TSP-1 type 1 repeat	Thrombospondin type-1 (TSP1) repeat	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	PF00090	Thrombospondin type 1 domain (TSP_1)	Thrombospondin type 1 domain	-	Domain
A	PF01823	MAC/Perforin domain (MACPF)	MAC/Perforin domain	The membrane-attack complex (MAC) of the complement system forms transmembrane channels. These channels disrupt the phospholipid bilayer of target cells, leading to cell lysis and death. A number of proteins participate in the assembly of the MAC. Fr ...	The membrane-attack complex (MAC) of the complement system forms transmembrane channels. These channels disrupt the phospholipid bilayer of target cells, leading to cell lysis and death. A number of proteins participate in the assembly of the MAC. Freshly activated C5b binds to C6 to form a C5b-6 complex, then to C7 forming the C5b-7 complex. The C5b-7 complex binds to C8, which is composed of three chains (alpha, beta, and gamma), thus forming the C5b-8 complex. C5b-8 subsequently binds to C9 and acts as a catalyst in the polymerisation of C9. Active MAC has a subunit composition of C5b-C6-C7-C8-C9{n}. Perforin is a protein found in cytolytic T-cell and killer cells. In the presence of calcium, perforin polymerises into transmembrane tubules and is capable of lysing, non-specifically, a variety of target cells. There are a number of regions of similarity in the sequences of complement components C6, C7, C8-alpha, C8-beta, C9 and perforin. The X-ray crystal structure of a MACPF domain reveals that it shares a common fold with bacterial cholesterol dependent cytolysins (Pfam:PF01289) such as perfringolysin O. Three key pieces of evidence suggests that MACPF domains and CDCs are homologous: Functional similarity (pore formation), conservation of three glycine residues at a hinge in both families and conservation of a complex core fold [1].	Domain
A	PF21195	Complement components C8A/B/C6, EGF-like domain (C8A_B_C6_EGF-like)	Complement components C8A/B/C6, EGF-like domain	This domain is found in the alpha and beta chains of Complement component C8 (C8A/B), in Complement components C6 (C6) from humans, constituents of the membrane attack complex (MAC) that play a key role in the innate and adaptive immune response by f ...	This domain is found in the alpha and beta chains of Complement component C8 (C8A/B), in Complement components C6 (C6) from humans, constituents of the membrane attack complex (MAC) that play a key role in the innate and adaptive immune response by forming pores in the plasma membrane of target cells. This entry represents the rigid, disulfide-rich epidermal growth factor (EGF) domain, which is included in the regulatory segment of these proteins [1,2]. It is found C-terminal to the membrane attack complex perforin domain Pfam:PF01823 and N-terminal to the thrombospondin type 1 domain Pfam:PF00090.	Domain
A	PF00084	Sushi repeat (SCR repeat) (Sushi)	Sushi repeat (SCR repeat)	-	Domain
A	PF00057	Low-density lipoprotein receptor domain class A (Ldl_recept_a)	Low-density lipoprotein receptor domain class A	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Complement component C6	-	regulation of biological process response to stimulus immune response biological regulation positive regulation of biological process positive regulation of response to stimulus positive regulation of immune response regulation of response to stimulus immune system process regulation of immune response regulation of immune system process positive regulation of immune system process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of biological process response to stimulus immune response biological regulation positive regulation of biological process positive regulation of response to stimulus positive regulation of immune response regulation of response to stimulus immune system process regulation of immune response regulation of immune system process positive regulation of immune system process adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity humoral immune response complement activation humoral immune response mediated by circulating immunoglobulin leukocyte mediated immunity complement activation, classical pathway immunoglobulin mediated immune response adaptive immune response immune effector process B cell mediated immunity 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 developmental process multicellular organism development multicellular organismal process embryo development ending in birth or egg hatching chordate embryonic development anatomical structure development embryo development in utero embryonic development cellular process disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing	extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle cell periphery protein-containing complex plasma membrane protein complex membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space cellular anatomical entity vesicle extracellular membrane-bounded organelle cell periphery protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex pore complex membrane attack complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002172	Low-density lipoprotein (LDL) receptor class A repeat	Repeat
A	IPR001862	Membrane attack complex component/perforin/complement C9	Family
A	IPR036055	LDL receptor-like superfamily	Homologous Superfamily
A	IPR020863	Membrane attack complex component/perforin domain, conserved site	Conserved Site
A	IPR048828	Complement component C6, KAZAL domain	Domain
A	IPR000436	Sushi/SCR/CCP domain	Domain
A	IPR002350	Kazal domain	Domain
A	IPR003884	Factor I / membrane attack complex	Domain
A	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily
A	IPR000884	Thrombospondin type-1 (TSP1) repeat	Repeat
A	IPR020864	Membrane attack complex component/perforin (MACPF) domain	Domain
A	IPR036383	Thrombospondin type-1 (TSP1) repeat superfamily	Homologous Superfamily
A	IPR048831	Complement components C8A/B/C6, EGF-like domain	Domain
A	IPR023415	Low-density lipoprotein (LDL) receptor class A, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P13671	complement component 6 deficiency calcinosis heart valve disease lung carcinoma Microcalcification pancreatic intraductal papillary-mucinous neoplasm invasive ductal breast carcinoma malignant ependymoma pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia ductal breast carcinoma in situ lung adenocarcinoma malignant pancreatic neoplasm pancreatic intraductal papillary-mucinous carcinoma psoriasis