Annotations: 4MUC

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sushi_4	e4mucA1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi_4	ECOD (1.6)
A	Sushi_3	e4mucA2	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi_3	ECOD (1.6)
B	Sushi_4	e4mucB1	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi_4	ECOD (1.6)
B	Sushi_3	e4mucB2	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: Complement control module/SCR domain	F: Sushi_3	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	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, B	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, B	Complement factor H-related protein 1	opsonin binding protein binding binding complement component C3b binding complement binding identical protein binding	biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response defense response to symbiont response to external stimulus disruption of cell in another organism response to biotic stimulus biological process involved in symbiotic interaction killing by host of symbiont cells cytolysis by host of symbiont cells defense response to other organism response to stress cellular process biological process involved in interspecies interaction between organisms response to stimulus response to other organism defense response defense response to symbiont response to external stimulus disruption of cell in another organism response to biotic stimulus biological process involved in symbiotic interaction killing by host of symbiont cells cytolysis by host of symbiont cells defense response to other organism response to stress cellular process response to external biotic stimulus disruption of anatomical structure in another organism biological process involved in interaction with symbiont killing of cells of another organism cell killing regulation of protein binding regulation of molecular function negative regulation of protein binding negative regulation of binding regulation of binding biological regulation negative regulation of molecular function humoral immune response regulation of biological process immune response positive regulation of biological process immune effector process positive regulation of response to stimulus complement activation 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 activation of immune response	extracellular region extracellular space cellular anatomical entity blood microparticle protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR051503	Complement System Regulators and Virion Entry Mediators	Family
A, B	IPR000436	Sushi/SCR/CCP domain	Domain
A, B	IPR035976	Sushi/SCR/CCP superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: Q03591	IgA glomerulonephritis age related macular degeneration 1 atypical hemolytic-uremic syndrome hemolytic uremic syndrome, atypical, susceptibility to, 1 age-related macular degeneration C3 glomerulonephritis bacterial infectious disease membranoproliferative glomerulonephritis hemolytic-uremic syndrome skin disease dense deposit disease wet macular degeneration

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.