Annotations: 7FC3

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth E]	SCOP2B Superfamily	SARS coronavirus receptor-binding domain-like	8053550	3001706	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth E]	PF01600	e7fc3E1	A: a+b three layers	X: Coronavirus spike protein receptor-binding domain (From Homology)	H: Coronavirus spike protein receptor-binding domain	T: Alpha-coronavirus spike protein receptor-binding domain	F: PF01600	ECOD (1.6)
B [auth A]	PF01401	e7fc3A1	A: mixed a+b and a/b	X: Zincin-like	H: Metalloproteases (zincins) catalytic domain (From Topology)	T: Metalloproteases (zincins) catalytic domain	F: PF01401	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth E]	PF01600	Coronavirus spike glycoprotein S1 (CoV_S1)	Coronavirus spike glycoprotein S1	-	Family
B [auth A]	PF01401	Angiotensin-converting enzyme (Peptidase_M2)	Angiotensin-converting enzyme	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E]	Spike protein S1	host cell surface binding binding host cell surface receptor 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 import into cell transport establishment of localization vesicle-mediated transport localization symbiont entry into host cell symbiont entry into host endocytosis involved in viral entry into host cell endocytosis transport of virus	membrane cellular anatomical entity virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endoplasmic reticulum-Golgi intermediate compartment membrane host cell endoplasmic reticulum-Golgi intermediate compartment host cell cytoplasm host cell part membrane cellular anatomical entity virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane host cell cytoplasm part host intracellular organelle host cell endoplasmic reticulum-Golgi intermediate compartment membrane host cell endoplasmic reticulum-Golgi intermediate compartment host cell cytoplasm host cell part host intracellular region viral membrane viral envelope
B [auth A]	Angiotensin-converting enzyme	peptidase activity catalytic activity, acting on a protein metallopeptidase activity hydrolase activity catalytic activity peptidyl-dipeptidase activity exopeptidase activity carboxypeptidase activity cation binding ion binding binding metal ion binding small molecule binding	organonitrogen compound metabolic process proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process	membrane-bounded organelle cell projection organelle cilium cellular anatomical entity plasma membrane bounded cell projection cell periphery plasma membrane membrane intracellular anatomical structure cytoplasm apical part of cell plasma membrane region apical plasma membrane membrane-bounded organelle cell projection organelle cilium cellular anatomical entity plasma membrane bounded cell projection cell periphery plasma membrane membrane intracellular anatomical structure cytoplasm apical part of cell plasma membrane region apical plasma membrane extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E]	IPR002551	Spike glycoprotein S1, coronavirus	Domain
A [auth E]	IPR044874	Spike glycoprotein S2, coronavirus, heptad repeat 2	Domain
A [auth E]	IPR043614	Spike glycoprotein S2, coronavirus, C-terminal	Domain
A [auth E]	IPR044873	Spike glycoprotein S2, coronavirus, heptad repeat 1	Domain
A [auth E]	IPR043473	Spike glycoprotein S2 superfamily, coronavirus	Homologous Superfamily
A [auth E]	IPR042552	Spike glycoprotein, Alphacoronavirus	Family
A [auth E]	IPR043607	Coronavirus spike glycoprotein S1, C-terminal	Domain
A [auth E]	IPR002552	Spike glycoprotein S2, coronavirus	Domain
B [auth A]	IPR031588	Collectrin domain	Domain
B [auth A]	IPR001548	Peptidase M2, peptidyl-dipeptidase A	Family

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.