Annotations: 7Q6C

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Kazal-type serine protease inhibitors	8052115	3000605	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Kazal-type serine protease inhibitors	8052114	3000605	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	PF18434	e7q6cA1	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: PF18434	ECOD (1.6)
A	PF21288	e7q6cA3	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: PF21288	ECOD (1.6)
A	F_UNCLASSIFIED	e7q6cA2	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: EGF/Laminin	F: F_UNCLASSIFIED	ECOD (1.6)
B [auth H]	PF07654	e7q6cH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07654	ECOD (1.6)
B [auth H]	PF07686	e7q6cH2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07686	ECOD (1.6)
C [auth K]	PF07686	e7q6cK1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07686	ECOD (1.6)
D [auth L]	PF07654	e7q6cL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07654	ECOD (1.6)
D [auth L]	PF07686	e7q6cL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07686	ECOD (1.6)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth H]	Heavy Chain	IGHV5	-	complement component c6	SAbDab (2024-04-26)
C [auth K]	Heavy Chain	IGHV1	-	-	SAbDab (2024-04-26)
D [auth L]	Light Chain	IGKV2	Kappa	complement component c6	SAbDab (2024-04-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF07648	Kazal-type serine protease inhibitor domain (Kazal_2)	Kazal-type serine protease inhibitor domain	Usually indicative of serine protease inhibitors. However, kazal-like domains are also seen in the extracellular part of agrins, which are not known to be protease inhibitors. Kazal domains often occur in tandem arrays. Small alpha+beta fold containi ...	Usually indicative of serine protease inhibitors. However, kazal-like domains are also seen in the extracellular part of agrins, which are not known to be protease inhibitors. Kazal domains often occur in tandem arrays. Small alpha+beta fold containing three disulphides.	Domain

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
B [auth H]	CP010 heavy chain	-	-	-
C [auth K]	kappa specific nanobody	-	-	-
D [auth L]	CP010 light chain	-	-	-

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

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 R01GM133198.