Annotations: 9KUD

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01401	Angiotensin-converting enzyme (Peptidase_M2)	Angiotensin-converting enzyme	-	Family
C [auth E], D [auth F]	PF09408	Betacoronavirus spike glycoprotein S1, receptor binding (bCoV_S1_RBD)	Betacoronavirus spike glycoprotein S1, receptor binding	This entry represents the receptor binding domain (S1 RBD) of the betacoronavirus spike glycoprotein. The spike glycoprotein is arranged in trimers on the surface of the viral membrane and is essential for viral entry. The spike protein is translat ...	This entry represents the receptor binding domain (S1 RBD) of the betacoronavirus spike glycoprotein. The spike glycoprotein is arranged in trimers on the surface of the viral membrane and is essential for viral entry. The spike protein is translated as a large polypeptide that is subsequently cleaved to the distal S1, responsible for receptor binding, and the membrane-anchored S2 responsible for membrane fusion [1]. The coronavirus (SARS-CoV) S1 subunit is composed of two distinct domains: an N-terminal domain (S1 NTD) and a receptor-binding domain (S1 RBD) also referred to as the S1 CTD or domain B. Each of these domains have been implicated in binding to host receptors. However, most coronaviruses are not known to utilise both the S1 NTD and S1 RBD for viral entry [2]. SARS-CoV makes use of its S1 RBD to bind to the human angiotensin-converting enzyme 2 (ACE2) as its host receptor [3,4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Angiotensin-converting enzyme	peptidase activity catalytic activity, acting on a protein metallocarboxypeptidase activity hydrolase activity metallopeptidase activity exopeptidase activity catalytic activity metalloexopeptidase activity carboxypeptidase activity protein binding binding virus receptor activity exogenous protein binding peptidyl-dipeptidase activity peptidase activity catalytic activity, acting on a protein metallocarboxypeptidase activity hydrolase activity metallopeptidase activity exopeptidase activity catalytic activity metalloexopeptidase activity carboxypeptidase activity protein binding binding virus receptor activity exogenous protein binding peptidyl-dipeptidase activity transporter activator activity molecular function activator activity molecular function regulator activity transporter regulator activity endopeptidase activity cation binding ion binding metal ion binding small molecule binding identical protein binding	regulation of systemic arterial blood pressure by renin-angiotensin regulation of systemic arterial blood pressure by hormone multicellular organismal process peptide hormone processing regulation of systemic arterial blood pressure mediated by a chemical signal system process signaling receptor ligand precursor processing protein maturation circulatory system process proteolysis amide metabolic process protein metabolic process regulation of biological quality blood circulation regulation of systemic arterial blood pressure by renin-angiotensin regulation of systemic arterial blood pressure by hormone multicellular organismal process peptide hormone processing regulation of systemic arterial blood pressure mediated by a chemical signal system process signaling receptor ligand precursor processing protein maturation circulatory system process proteolysis amide metabolic process protein metabolic process regulation of biological quality blood circulation regulation of blood pressure regulation of hormone levels biological regulation regulation of systemic arterial blood pressure by circulatory renin-angiotensin primary metabolic process gene expression macromolecule biosynthetic process hormone metabolic process regulation of systemic arterial blood pressure endocrine process biosynthetic process regulation of angiotensin levels in blood protein processing metabolic process cellular process macromolecule metabolic process angiotensin maturation heart process regulation of biological process regulation of cardiac conduction regulation of heart contraction regulation of system process regulation of blood circulation cardiac conduction regulation of multicellular organismal process heart contraction regulation of blood volume by renin-angiotensin nervous system process feeding behavior brain renin-angiotensin system behavior drinking behavior angiotensin-mediated drinking behavior nervous system process involved in regulation of systemic arterial blood pressure regulation of cellular process positive regulation of cellular component organization regulation of cellular component organization gap junction assembly positive regulation of biological process cellular component biogenesis cellular component organization cellular component assembly positive regulation of gap junction assembly cell junction assembly cellular component organization or biogenesis positive regulation of cellular process cell-cell junction assembly cell-cell junction organization positive regulation of cellular component biogenesis regulation of gap junction assembly regulation of cellular component biogenesis regulation of cell junction assembly positive regulation of cell junction assembly cell junction organization aromatic amino acid transport nitrogen compound transport organic anion transport carboxylic acid transport transport establishment of localization organic cation transport organic acid transport amino acid transport localization tryptophan transport regulation of localization carboxylic acid transmembrane transport regulation of L-proline import across plasma membrane positive regulation of amine transport regulation of amino acid transport regulation of proline transport organic acid transmembrane transport import across plasma membrane L-proline transmembrane transport proline transport transmembrane transport regulation of amino acid import across plasma membrane regulation of transmembrane transport positive regulation of amino acid transport L-alpha-amino acid transmembrane transport amino acid import across plasma membrane proline import across plasma membrane import into cell regulation of proline import across plasma membrane positive regulation of L-proline import across plasma membrane amino acid transmembrane transport L-amino acid transport positive regulation of transmembrane transport regulation of amino acid transmembrane transport regulation of transport neutral amino acid transport L-proline import across plasma membrane positive regulation of organic acid transport amine transport proline transmembrane transport positive regulation of transport positive regulation of proline import across plasma membrane regulation of organic acid transport regulation of amine transport 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 entry receptor-mediated virion attachment to host cell viral process viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction positive regulation of blood circulation positive regulation of cardiac muscle contraction cardiac muscle contraction striated muscle contraction positive regulation of striated muscle contraction regulation of cardiac muscle contraction muscle contraction muscle system process regulation of muscle system process positive regulation of heart contraction regulation of striated muscle contraction regulation of muscle contraction positive regulation of muscle contraction positive regulation of multicellular organismal process	membrane-bounded organelle cell projection cellular anatomical structure organelle cilium plasma membrane bounded cell projection cell periphery apical part of cell membrane plasma membrane plasma membrane region apical plasma membrane cell surface brush border membrane membrane-bounded organelle cell projection cellular anatomical structure organelle cilium plasma membrane bounded cell projection cell periphery apical part of cell membrane plasma membrane plasma membrane region apical plasma membrane cell surface brush border membrane cluster of actin-based cell projections brush border cell projection membrane intracellular anatomical structure cytoplasm extracellular region extracellular space
C [auth E], D [auth F]	Spike protein S1	protein binding binding molecular function activator activity signaling receptor binding molecular function regulator activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity host cell surface binding host cell surface receptor binding structural constituent of virion structural molecule activity identical protein binding	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion cellular process cellular component organization or biogenesis symbiont-mediated disruption of host anatomical structure biological process involved in interspecies interaction between organisms symbiont-mediated disruption of host tissue disruption of anatomical structure in another organism symbiont entry into host cell symbiont entry into host viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion cellular process cellular component organization or biogenesis symbiont-mediated disruption of host anatomical structure biological process involved in interspecies interaction between organisms symbiont-mediated disruption of host tissue disruption of anatomical structure in another organism symbiont entry into host cell symbiont entry into host viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction virion attachment to host cell receptor-mediated virion attachment to host cell adhesion of symbiont to host cell adhesion of symbiont to host viral gene expression viral translation fusion of virus membrane with host plasma membrane endocytosis involved in viral entry into host cell symbiont-mediated perturbation of host defense response symbiont-mediated perturbation of host process symbiont-mediated-mediated suppression of host tetherin activity modulation of process of another organism regulation of biological process positive regulation of viral life cycle positive regulation of viral process biological regulation positive regulation of biological process modulation by symbiont of entry into host regulation of viral entry into host cell regulation of viral life cycle regulation of viral process positive regulation of viral entry into host cell positive regulation by symbiont of entry into host regulation of biological process involved in symbiotic interaction symbiont-mediated suppression of host immune response symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host immune response symbiont-mediated perturbation of host innate immune response entry receptor-mediated virion attachment to host cell	cellular anatomical structure membrane host extracellular space host cellular component other organism part cell periphery plasma membrane host intracellular membrane-bounded organelle 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 cellular anatomical structure membrane host extracellular space host cellular component other organism part cell periphery plasma membrane host intracellular membrane-bounded organelle 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 host cell plasma membrane virion component virion membrane viral membrane viral envelope host cell surface

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR031588	Collectrin domain	Domain
A, B	IPR001548	Peptidase M2, peptidyl-dipeptidase A	Family
C [auth E], D [auth F]	IPR044873	Spike glycoprotein S2, coronavirus, heptad repeat 1	Domain
C [auth E], D [auth F]	IPR044366	Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2	Domain
C [auth E], D [auth F]	IPR018548	Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus	Domain
C [auth E], D [auth F]	IPR044341	Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like	Domain
C [auth E], D [auth F]	IPR032500	Spike glycoprotein S1, N-terminal domain, betacoronavirus-like	Domain
C [auth E], D [auth F]	IPR042578	Spike glycoprotein, betacoronavirus	Family
C [auth E], D [auth F]	IPR036326	Spike S1 subunit, receptor binding domain superfamily, betacoronavirus	Homologous Superfamily
C [auth E], D [auth F]	IPR043002	Spike glycoprotein, N-terminal domain superfamily	Homologous Superfamily
C [auth E], D [auth F]	IPR044874	Spike glycoprotein S2, coronavirus, heptad repeat 2	Domain
C [auth E], D [auth F]	IPR043473	Spike glycoprotein S2 superfamily, coronavirus	Homologous Superfamily
C [auth E], D [auth F]	IPR043607	Coronavirus spike glycoprotein S1, C-terminal	Domain
C [auth E], D [auth F]	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.