Annotations: 4K12

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sushi_4	e4k12A1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi_4	ECOD (1.6)
B	RICH	e4k12B1	A: alpha bundles	X: immunoglobulin/albumin-binding domain-like	H: Choline binding protein A (From Topology)	T: Choline binding protein A	F: RICH	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.10.70.10	Mainly Beta	Ribbon	Complement Module	domain 1	CATH (4.3.0)
B	1.20.81.20	Mainly Alpha	Up-down Bundle	Receptor-associated Protein		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00084	Sushi repeat (SCR repeat) (Sushi)	Sushi repeat (SCR repeat)	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Complement factor H	opsonin binding protein binding binding complement component C3b binding complement binding heparin binding glycosaminoglycan binding carbohydrate derivative binding sulfur compound binding identical protein binding heparan sulfate proteoglycan binding proteoglycan binding	regulation of humoral immune response regulation of immune effector process regulation of defense response humoral immune response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms response to stimulus regulation of response to external stimulus positive regulation of biological process complement activation, alternative pathway response to biotic stimulus positive regulation of response to stimulus complement activation positive regulation of immune response response to stress regulation of humoral immune response regulation of immune effector process regulation of defense response humoral immune response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms response to stimulus regulation of response to external stimulus positive regulation of biological process complement activation, alternative pathway response to biotic stimulus positive regulation of response to stimulus complement activation positive regulation of immune response response to stress regulation of response to stress innate immune response regulation of immune system process response to external biotic stimulus positive regulation of immune system process regulation of biological process regulation of complement activation, alternative pathway immune response response to other organism defense response regulation of innate immune response biological regulation defense response to symbiont response to external stimulus immune effector process regulation of response to stimulus immune system process defense response to other organism regulation of immune response regulation of complement activation activation of immune response regulation of cellular process regulation of complement-dependent cytotoxicity cellular process regulation of cell killing complement-dependent cytotoxicity cell killing organic substance metabolic process organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	extracellular region extracellular space cellular anatomical entity blood microparticle extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle organelle vesicle extracellular membrane-bounded organelle protein-containing complex catalytic complex peptidase complex extracellular region extracellular space cellular anatomical entity blood microparticle extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle organelle vesicle extracellular membrane-bounded organelle protein-containing complex catalytic complex peptidase complex endopeptidase complex serine-type endopeptidase complex serine-type peptidase complex other organism part symbiont cell surface
B	Choline binding protein A	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000436	Sushi/SCR/CCP domain	Domain
A	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P08603	age-related macular degeneration complement factor H deficiency age related macular degeneration 4 basal laminar drusen atypical hemolytic-uremic syndrome hemolytic uremic syndrome, atypical, susceptibility to, 1 membranoproliferative glomerulonephritis meningococcal infection hemolytic-uremic syndrome Doyne honeycomb retinal dystrophy primary immunodeficiency disease IgA glomerulonephritis macular degeneration pituitary cancer Emery-Dreifuss muscular dystrophy age-related macular degeneration complement factor H deficiency age related macular degeneration 4 basal laminar drusen atypical hemolytic-uremic syndrome hemolytic uremic syndrome, atypical, susceptibility to, 1 membranoproliferative glomerulonephritis meningococcal infection hemolytic-uremic syndrome Doyne honeycomb retinal dystrophy primary immunodeficiency disease IgA glomerulonephritis macular degeneration pituitary cancer Emery-Dreifuss muscular dystrophy psoriasis hemolytic anemia interstitial lung disease limb-girdle muscular dystrophy adrenal cortex carcinoma lung carcinoma Antibody Deficiency Syndrome malignant mesothelioma bacterial infectious disease blindness (disorder) non-small cell lung carcinoma pancreatic ductal adenocarcinoma Pick disease Duchenne muscular dystrophy facioscapulohumeral muscular dystrophy retinal degeneration invasive ductal breast carcinoma lung adenocarcinoma atopic eczema medulloblastoma breast carcinoma oligodendroglioma cystic fibrosis pancreatic intraductal papillary-mucinous carcinoma drug-induced liver injury pilocytic astrocytoma ductal breast carcinoma in situ primary membranoproliferative glomerulonephritis HELLP syndrome wet macular degeneration immunoglobulin-mediated membranoproliferative glomerulonephritis juvenile dermatomyositis lung cancer malignant colon neoplasm Becker muscular dystrophy breast fibroadenoma ovarian cancer dense deposit disease pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.