Annotations: 4FN0

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	I-set_8	e4fn0A2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_8	ECOD (1.6)
A	V-set_15	e4fn0A1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_15	ECOD (1.6)
B	I-set_8	e4fn0B2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_8	ECOD (1.6)
B	V-set_15	e4fn0B1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_15	ECOD (1.6)
C	I-set_8	e4fn0C2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_8	ECOD (1.6)
C	V-set_15	e4fn0C1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_15	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A, B, C	Poliovirus receptor-related protein 2	1V-1C-LIKE	Mus musculus (house mouse)	PVRL2*01	V-LIKE-DOMAIN V-LIKE, C-LIKE-DOMAIN C-LIKE	RPI	1V-1C-LIKE	IMGT (202435-0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF07686	Immunoglobulin V-set domain (V-set)	Immunoglobulin V-set domain	This domain is found in antibodies as well as neural protein P0 and CTL4 amongst others.	Domain
A, B, C	PF08205	CD80-like C2-set immunoglobulin domain (C2-set_2)	CD80-like C2-set immunoglobulin domain	These domains belong to the immunoglobulin superfamily.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	Poliovirus receptor-related protein 2	cell adhesion molecule binding protein binding binding identical protein binding protein homodimerization activity protein dimerization activity	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of immune effector process T cell mediated immunity positive regulation of leukocyte mediated immunity regulation of cellular process response to stimulus positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of lymphocyte mediated immunity positive regulation of biological process positive regulation of response to stimulus regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of immune response positive regulation of leukocyte mediated cytotoxicity leukocyte mediated immunity adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity regulation of immune effector process T cell mediated immunity positive regulation of leukocyte mediated immunity regulation of cellular process response to stimulus positive regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of lymphocyte mediated immunity positive regulation of biological process positive regulation of response to stimulus regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains positive regulation of immune response positive regulation of leukocyte mediated cytotoxicity leukocyte mediated immunity regulation of immune system process positive regulation of immune effector process positive regulation of adaptive immune response susceptibility to T cell mediated cytotoxicity positive regulation of immune system process positive regulation of cellular process regulation of T cell mediated immunity T cell mediated cytotoxicity regulation of biological process positive regulation of T cell mediated cytotoxicity immune response regulation of adaptive immune response biological regulation regulation of leukocyte mediated cytotoxicity leukocyte mediated cytotoxicity adaptive immune response immune effector process regulation of leukocyte mediated immunity regulation of T cell mediated cytotoxicity regulation of lymphocyte mediated immunity regulation of response to stimulus positive regulation of T cell mediated immunity immune system process regulation of immune response regulation of cell killing cellular process positive regulation of cell killing cell killing developmental process spermatid development spermatid differentiation sexual reproduction cellular developmental process spermatogenesis reproductive process multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism developmental process involved in reproduction gamete generation male gamete generation cellular component organization nucleus organization organelle organization cell differentiation anatomical structure development germ cell development cellular component organization or biogenesis spermatid nucleus differentiation fertilization sperm mitochondrion organization mitochondrion organization virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral process coreceptor-mediated virion attachment to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction localization cellular localization establishment of localization in cell establishment of localization cellular response to stimulus positive regulation of cell communication immune response-regulating cell surface receptor signaling pathway positive regulation of signal transduction positive regulation of T cell receptor signaling pathway signaling regulation of antigen receptor-mediated signaling pathway regulation of signal transduction cell communication immune response-activating signaling pathway immune response-regulating signaling pathway signal transduction regulation of signaling cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway regulation of T cell receptor signaling pathway T cell receptor signaling pathway regulation of cell communication antigen receptor-mediated signaling pathway activation of immune response positive regulation of antigen receptor-mediated signaling pathway positive regulation of signaling cytoskeleton organization membrane organization membrane fusion fusion of virus membrane with host plasma membrane membrane fusion involved in viral entry into host cell positive regulation of B cell mediated immunity regulation of immunoglobulin mediated immune response positive regulation of immunoglobulin mediated immune response regulation of B cell mediated immunity immunoglobulin mediated immune response B cell mediated immunity multicellular organismal process positive regulation of mast cell activation regulation of leukocyte activation cell activation regulation of cell activation myeloid leukocyte activation leukocyte activation positive regulation of cell activation positive regulation of leukocyte activation mast cell activation positive regulation of multicellular organismal process regulation of mast cell activation regulation of multicellular organismal process plasma membrane bounded cell projection organization cell projection organization cilium organization cellular anatomical entity morphogenesis cell adhesion cell-cell adhesion cell-cell adhesion via plasma-membrane adhesion molecules homophilic cell adhesion via plasma membrane adhesion molecules positive regulation of response to biotic stimulus positive regulation of natural killer cell mediated cytotoxicity directed against tumor cell target immune response to tumor cell response to biotic stimulus positive regulation of natural killer cell mediated immunity regulation of natural killer cell mediated cytotoxicity directed against tumor cell target regulation of natural killer cell mediated immune response to tumor cell natural killer cell mediated immunity regulation of natural killer cell mediated immunity positive regulation of immune response to tumor cell response to other organism regulation of innate immune response response to external stimulus natural killer cell mediated immune response to tumor cell defense response to other organism positive regulation of defense response natural killer cell mediated cytotoxicity positive regulation of natural killer cell mediated cytotoxicity positive regulation of response to tumor cell regulation of defense response regulation of response to biotic stimulus regulation of natural killer cell mediated cytotoxicity regulation of response to external stimulus positive regulation of natural killer cell mediated immune response to tumor cell regulation of response to tumor cell positive regulation of response to external stimulus response to stress regulation of response to stress innate immune response response to external biotic stimulus response to tumor cell positive regulation of innate immune response defense response defense response to symbiont regulation of immune response to tumor cell natural killer cell mediated cytotoxicity directed against tumor cell target susceptibility to natural killer cell mediated cytotoxicity cellular component assembly involved in morphogenesis cellular component biogenesis vesicle organization cellular component assembly endomembrane system organization organelle assembly secretory granule organization anatomical structure morphogenesis anatomical structure formation involved in morphogenesis acrosome assembly establishment of organelle localization mitochondrion localization organelle localization establishment of mitochondrion localization modulation by symbiont of entry into host regulation of viral entry into host cell regulation of viral life cycle regulation of viral process symbiont entry into host cell symbiont entry into host regulation of biological process involved in symbiotic interaction	cell-cell junction anchoring junction cell junction cellular anatomical entity cell surface cell periphery plasma membrane membrane apical junction complex adherens junction zonula adherens cell-cell contact zone

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, B, C	IPR013106	Immunoglobulin V-set domain	Domain
A, B, C	IPR003599	Immunoglobulin domain subtype	Domain
A, B, C	IPR052659	Nectin and Poliovirus Receptor	Family
A, B, C	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B, C	IPR013162	CD80-like, immunoglobulin C2-set	Domain
A, B, C	IPR007110	Immunoglobulin-like domain	Domain

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.