Annotations: 1WDF

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1wdfa_	Coiled coil proteins	Stalk segment of viral fusion proteins	Coronavirus S2 glycoprotein	Coronavirus spike glycoprotein S2 fragments	E2 spike glycoprotein	(Murine hepatitis virus strain A59 ) [TaxId: 11142 ], (Murine hepatitis virus strain A59 ) [TaxId: 11142 ],	SCOPe (2.08)
B	d1wdfb_	Coiled coil proteins	Stalk segment of viral fusion proteins	Coronavirus S2 glycoprotein	Coronavirus spike glycoprotein S2 fragments	E2 spike glycoprotein	(Murine hepatitis virus strain A59 ) [TaxId: 11142 ], (Murine hepatitis virus strain A59 ) [TaxId: 11142 ],	SCOPe (2.08)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.5.300	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
B	1.20.5.300	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	E2 glycoprotein	identical protein binding protein binding binding	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell virion attachment to host cell biological process involved in interspecies interaction between organisms receptor-mediated virion attachment to host cell adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction membrane organization cellular component organization membrane fusion viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell virion attachment to host cell biological process involved in interspecies interaction between organisms receptor-mediated virion attachment to host cell adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis symbiont entry into host cell symbiont entry into host endocytosis involved in viral entry into host cell	cellular anatomical structure membrane virion component virion membrane host cellular component host intracellular part host cell cytoplasm host cell part host cell Golgi apparatus host intracellular region host cell cytoplasm part host intracellular membrane-bounded organelle host cell membrane host intracellular organelle cellular anatomical structure membrane virion component virion membrane host cellular component host intracellular part host cell cytoplasm host cell part host cell Golgi apparatus host intracellular region host cell cytoplasm part host intracellular membrane-bounded organelle host cell membrane host intracellular organelle host cell endoplasmic reticulum-Golgi intermediate compartment membrane host cell endoplasmic reticulum-Golgi intermediate compartment viral membrane viral envelope host cell plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR018548	Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus	Domain
A, B	IPR032500	Spike glycoprotein S1, N-terminal domain, betacoronavirus-like	Domain
A, B	IPR042578	Spike glycoprotein, betacoronavirus	Family
A, B	IPR036326	Spike S1 subunit, receptor binding domain superfamily, betacoronavirus	Homologous Superfamily
A, B	IPR043002	Spike glycoprotein, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR044339	Spike (S) protein S1 subunit, N-terminal domain, murine hepatitis virus-like	Domain
A, B	IPR044874	Spike glycoprotein S2, coronavirus, heptad repeat 2	Domain
A, B	IPR043614	Spike glycoprotein S2, coronavirus, C-terminal	Domain
A, B	IPR044873	Spike glycoprotein S2, coronavirus, heptad repeat 1	Domain
A, B	IPR043473	Spike glycoprotein S2 superfamily, coronavirus	Homologous Superfamily
A, B	IPR043607	Coronavirus spike glycoprotein S1, C-terminal	Domain
A, B	IPR002552	Spike glycoprotein S2, coronavirus	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.