Annotations: 5B21

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d5b21b_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d5b21a_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Phage_integrase	e5b21B1	A: a/b three-layered sandwiches	X: Tetrapyrrole methylase C-terminal domain-like	H: Tetrapyrrole methylase C-terminal domain	T: Tetrapyrrole methylase C-terminal domain	F: Phage_integrase	ECOD (v294.1)
A	Phage_integrase	e5b21A1	A: a/b three-layered sandwiches	X: Tetrapyrrole methylase C-terminal domain-like	H: Tetrapyrrole methylase C-terminal domain	T: Tetrapyrrole methylase C-terminal domain	F: Phage_integrase	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

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

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	murine Nectin-1 D1	protein binding binding virus receptor activity exogenous protein binding molecular transducer activity signaling receptor activity cell adhesion molecule binding cell adhesion mediator activity carbohydrate binding identical protein binding protein homodimerization activity protein dimerization activity protein-containing complex binding virion binding	cellular component organization cell junction organization desmosome organization cellular process cellular component organization or biogenesis cell-cell junction organization localization transport iron ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport establishment of localization metal ion transport cellular component organization cell junction organization desmosome organization cellular process cellular component organization or biogenesis cell-cell junction organization localization transport iron ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport establishment of localization metal ion transport developmental process enamel mineralization tooth mineralization odontogenesis of dentin-containing tooth odontogenesis animal organ development amelogenesis tissue development anatomical structure morphogenesis anatomical structure development anatomical structure formation involved in morphogenesis animal organ morphogenesis biomineral tissue development multicellular organismal process sensory organ development eye development retina development in camera-type eye visual system development multicellular organism development camera-type eye development sensory system development system development biological process involved in interspecies interaction between organisms symbiont entry into host cell viral process symbiont entry into host viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction regulation of biological process regulation of cellular component organization regulation of cellular process biological regulation regulation of synapse organization regulation of synapse structure or activity synapse organization regulation of biological quality heterophilic cell-cell adhesion cell adhesion cell-cell adhesion ear morphogenesis embryonic organ morphogenesis ear development embryonic morphogenesis embryo development sensory organ morphogenesis inner ear development cochlea development inner ear morphogenesis cochlea morphogenesis embryonic organ development axonogenesis cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis neurogenesis cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation plasma membrane bounded cell projection organization axon guidance nervous system development axon development cell morphogenesis involved in neuron differentiation generation of neurons neuron projection guidance neuron development camera-type eye morphogenesis eye morphogenesis homophilic cell-cell adhesion macromolecule localization intracellular protein localization protein localization to cell junction lens morphogenesis in camera-type eye lens development in camera-type eye cellular component biogenesis cellular component assembly cell junction assembly regulation of synapse assembly regulation of cellular component biogenesis regulation of cell junction assembly synapse assembly	cellular anatomical structure membrane cell periphery plasma membrane somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection cell-cell junction anchoring junction cell junction cell-cell contact zone cellular anatomical structure membrane cell periphery plasma membrane somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection cell-cell junction anchoring junction cell junction cell-cell contact zone apical junction complex synapse presynaptic active zone membrane presynaptic membrane synaptic membrane presynapse plasma membrane region presynaptic active zone adherens junction neuron to neuron synapse hippocampal mossy fiber to CA3 synapse axon growth cone membrane growth cone distal axon site of polarized growth

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR051427	Nectin and Nectin-like	Family
A, B	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, B	IPR003598	Immunoglobulin subtype 2	Domain
A, B	IPR013106	Immunoglobulin V-set domain	Domain
A, B	IPR003599	Immunoglobulin domain subtype	Domain
A, B	IPR041849	Nectin-1, first immunoglobulin variable domain	Domain
A, B	IPR041850	Nectin-1, second immunoglobulin domain	Domain
A, B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B	IPR013162	CD80-like, immunoglobulin C2-set	Domain
A, B	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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.