3R4D | pdb_00003r4d

Crystal structure of mouse coronavirus receptor-binding domain complexed with its murine receptor

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
D	d3r4dd_	All beta proteins	Concanavalin A-like lectins/glucanases	Concanavalin A-like lectins/glucanases	Coronavirus spike glycoprotein S1, N-terminal domain	Coronavirus spike glycoprotein S1	(Murine coronavirus ) [TaxId: 694005 ],	SCOPe (2.08)
B	d3r4db_	All beta proteins	Concanavalin A-like lectins/glucanases	Concanavalin A-like lectins/glucanases	Coronavirus spike glycoprotein S1, N-terminal domain	Coronavirus spike glycoprotein S1	(Murine coronavirus ) [TaxId: 694005 ],	SCOPe (2.08)
C	d3r4dc1	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)
C	d3r4dc2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	automated matches	Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d3r4da1	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	d3r4da2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	automated matches	Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	Concanavalin A-like lectins/glucanases	8091042	3000120	SCOP2B (2022-06-29)
B	SCOP2 Family	Coronavirus spike S1 glycoprotein N-terminal domain-like	8045606	4004563	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Concanavalin A-like lectins/glucanases	8091042	3000120	SCOP2 (2022-06-29)
C	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054803	3000071	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054511	3000071	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054511	3000071	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054803	3000071	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	YjeF_N	e3r4dD1	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: YjeF_N	ECOD (develop294)
B	bCoV_S1_N	e3r4dB1	A: alpha bundles	X: Thioredoxin-like	H: Thioredoxin-like	T: Thioredoxin-like	F: bCoV_S1_N	ECOD (develop294)
C	YjeF_N	e3r4dC2	A: alpha bundles	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: YjeF_N	ECOD (develop294)
C	Ig_2	e3r4dC3	A: alpha bundles	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: Ig_2	ECOD (develop294)
A	Anemone_cytotox	e3r4dA1	A: alpha bundles	X: EF-hand	H: Insect pheromone/odorant-binding proteins	T: Insect pheromone/odorant-binding proteins	F: Anemone_cytotox	ECOD (develop294)
A	Defensin_1	e3r4dA2	A: alpha bundles	X: Ribonuclease H-like	H: Immunoglobulin-related	T: Defensin-related	F: Defensin_1	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	2.60.120.960	Mainly Beta	Sandwich	Jelly Rolls	Spike glycoprotein, N-terminal domain	CATH (4.3.0)
B	2.60.120.960	Mainly Beta	Sandwich	Jelly Rolls	Spike glycoprotein, N-terminal domain	CATH (4.3.0)
C	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)

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, C	Ceacam1, CEA-related cell adhesion molecule 1, isoform 1/2S	1V-1C-LIKE	Mus musculus (house mouse)	CEACAM1*01	V-LIKE-DOMAIN V-LIKE, C-LIKE-DOMAIN C-LIKE	RPI	1V-1C-LIKE	IMGT (202610-0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, 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, C	PF13927	Immunoglobulin domain (Ig_3)	Immunoglobulin domain	This family contains immunoglobulin-like domains.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D	Spike glycoprotein	-	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 intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part 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 cellular anatomical structure membrane virion component virion membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell membrane other organism part 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 host cell plasma membrane
A, C	CEA-related cell adhesion molecule 1, isoform 1/2S	cytoskeletal protein binding protein binding binding filamin binding signaling receptor binding Toll-like receptor binding lipid transporter activity lipid transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity bile acid transmembrane transporter activity protein phosphatase binding cytoskeletal protein binding protein binding binding filamin binding signaling receptor binding Toll-like receptor binding lipid transporter activity lipid transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity bile acid transmembrane transporter activity protein phosphatase binding phosphatase binding enzyme binding calmodulin binding cytokine receptor binding granulocyte colony-stimulating factor receptor binding growth factor receptor binding protein dimerization activity protein tyrosine kinase binding kinase binding protein kinase binding identical protein binding virus receptor activity exogenous protein binding protein homodimerization activity actin binding	multicellular organismal process regulation of cellular process negative regulation of biological process negative regulation of interleukin-2 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of interleukin-2 production regulation of biological process negative regulation of metabolic process biological regulation multicellular organismal process regulation of cellular process negative regulation of biological process negative regulation of interleukin-2 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of interleukin-2 production regulation of biological process negative regulation of metabolic process biological regulation interleukin-2 production negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process regulation of lipid metabolic process lipid biosynthetic process primary metabolic process negative regulation of lipid biosynthetic process regulation of primary metabolic process regulation of lipid biosynthetic process negative regulation of lipid metabolic process lipid metabolic process regulation of developmental process cellular developmental process positive regulation of biological process regulation of vasculogenesis regulation of cell differentiation vasculogenesis positive regulation of developmental process multicellular organism development tube morphogenesis positive regulation of cell differentiation cell differentiation anatomical structure development positive regulation of cellular process blood vessel development system development developmental process blood vessel morphogenesis tube development vasculature development circulatory system development anatomical structure morphogenesis positive regulation of vasculogenesis regulation of cell motility endothelial cell migration regulation of locomotion regulation of cell migration regulation of endothelial cell migration cell migration cell motility locomotion regulation of body fluid levels response to stimulus regulation of cell activation negative regulation of cell adhesion negative regulation of platelet activation regulation of coagulation regulation of biological quality response to wounding negative regulation of homotypic cell-cell adhesion negative regulation of wound healing negative regulation of blood coagulation response to external stimulus blood coagulation negative regulation of hemostasis regulation of platelet activation regulation of response to stimulus negative regulation of response to external stimulus negative regulation of cell-cell adhesion regulation of wound healing platelet activation regulation of response to external stimulus homotypic cell-cell adhesion regulation of response to wounding cell adhesion cell-cell adhesion response to stress regulation of response to stress coagulation regulation of cell-cell adhesion regulation of hemostasis wound healing negative regulation of response to stimulus regulation of homotypic cell-cell adhesion regulation of cell adhesion regulation of blood coagulation hemostasis cell activation negative regulation of platelet aggregation negative regulation of response to wounding platelet aggregation negative regulation of cell activation regulation of platelet aggregation negative regulation of coagulation regulation of tissue remodeling regulation of blood vessel remodeling blood vessel remodeling tissue remodeling regulation of anatomical structure morphogenesis regulation of sprouting angiogenesis angiogenesis regulation of vasculature development regulation of multicellular organismal development sprouting angiogenesis regulation of angiogenesis anatomical structure formation involved in morphogenesis regulation of growth regulation of cellular component organization growth regulation of cell growth cell growth cellular component organization cellular component organization or biogenesis cellular response to stimulus cell surface receptor signaling pathway signaling granulocyte colony-stimulating factor signaling pathway response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular response to cytokine stimulus signal transduction negative regulation of lymphocyte proliferation regulation of leukocyte activation negative regulation of T cell proliferation negative regulation of leukocyte proliferation T cell activation lymphocyte proliferation regulation of immune system process regulation of leukocyte proliferation cell population proliferation negative regulation of T cell activation negative regulation of leukocyte cell-cell adhesion regulation of cell population proliferation mononuclear cell proliferation regulation of leukocyte cell-cell adhesion negative regulation of leukocyte activation lymphocyte activation negative regulation of lymphocyte activation leukocyte proliferation leukocyte cell-cell adhesion leukocyte activation negative regulation of mononuclear cell proliferation T cell proliferation regulation of lymphocyte proliferation negative regulation of cell population proliferation regulation of T cell activation regulation of T cell proliferation negative regulation of immune system process immune system process regulation of mononuclear cell proliferation regulation of lymphocyte activation myeloid leukocyte differentiation regulation of leukocyte differentiation cell development regulation of cell development regulation of osteoclast differentiation osteoclast differentiation negative regulation of cell differentiation negative regulation of hemopoiesis negative regulation of leukocyte differentiation hemopoiesis regulation of myeloid cell differentiation negative regulation of developmental process regulation of myeloid leukocyte differentiation negative regulation of myeloid cell differentiation negative regulation of osteoclast differentiation negative regulation of myeloid leukocyte differentiation negative regulation of cell development myeloid cell differentiation regulation of hemopoiesis leukocyte differentiation organic anion transport carboxylic acid transport transport lipid localization bile acid and bile salt transport lipid transport organic hydroxy compound transport establishment of localization organic acid transport localization monocarboxylic acid transport macromolecule localization negative regulation of vascular permeability regulation of vascular permeability system process circulatory system process vascular process in circulatory system blood circulation regulation of ERBB signaling pathway regulation of signaling regulation of signal transduction cell surface receptor protein tyrosine kinase signaling pathway regulation of epidermal growth factor receptor signaling pathway ERBB signaling pathway regulation of cell communication epidermal growth factor receptor signaling pathway enzyme-linked receptor protein signaling pathway interleukin-1 production negative regulation of interleukin-1 production regulation of interleukin-1 production positive regulation of cell communication positive regulation of signal transduction intracellular signal transduction positive regulation of response to stimulus positive regulation of JNK cascade regulation of intracellular signal transduction JNK cascade intracellular signaling cassette positive regulation of MAPK cascade regulation of JNK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade MAPK cascade positive regulation of signaling regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation negative regulation of phosphate metabolic process negative regulation of catalytic activity regulation of transferase activity negative regulation of kinase activity phosphate-containing compound metabolic process negative regulation of protein modification process protein metabolic process phosphorus metabolic process protein modification process negative regulation of protein metabolic process protein phosphorylation phosphorylation regulation of protein metabolic process negative regulation of molecular function negative regulation of protein kinase activity regulation of protein kinase activity regulation of molecular function regulation of kinase activity negative regulation of protein phosphorylation macromolecule modification negative regulation of phosphorus metabolic process regulation of phosphorylation regulation of phosphorus metabolic process negative regulation of phosphorylation import into cell insulin receptor internalization receptor internalization receptor-mediated endocytosis endocytosis vesicle-mediated transport 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 negative regulation of lymphocyte mediated immunity regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains negative regulation of leukocyte mediated cytotoxicity leukocyte mediated immunity negative regulation of cell killing regulation of T cell mediated immunity T cell mediated cytotoxicity immune response regulation of adaptive immune response negative regulation of immune response negative regulation of T cell mediated cytotoxicity negative regulation of immune effector process regulation of leukocyte mediated cytotoxicity negative regulation of adaptive immune response leukocyte mediated cytotoxicity adaptive immune response immune effector process negative regulation of adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains regulation of leukocyte mediated immunity regulation of T cell mediated cytotoxicity regulation of lymphocyte mediated immunity regulation of immune response regulation of cell killing negative regulation of leukocyte mediated immunity negative regulation of T cell mediated immunity cell killing negative regulation of tissue remodeling homeostatic process negative regulation of bone remodeling regulation of bone remodeling tissue homeostasis regulation of bone resorption bone resorption negative regulation of bone resorption multicellular organismal-level homeostasis bone remodeling anatomical structure homeostasis immune response to tumor cell negative regulation of immune response to tumor cell response to biotic stimulus negative 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 negative regulation of natural killer cell mediated cytotoxicity directed against tumor cell target response to other organism regulation of innate immune response natural killer cell mediated immune response to tumor cell defense response to other organism negative regulation of defense response natural killer cell mediated cytotoxicity regulation of defense response negative regulation of natural killer cell mediated cytotoxicity regulation of response to biotic stimulus regulation of natural killer cell mediated cytotoxicity biological process involved in interspecies interaction between organisms negative regulation of response to biotic stimulus negative regulation of response to tumor cell regulation of response to tumor cell innate immune response response to external biotic stimulus response to tumor cell defense response defense response to symbiont regulation of immune response to tumor cell natural killer cell mediated cytotoxicity directed against tumor cell target negative regulation of natural killer cell mediated immune response to tumor cell negative regulation of innate immune response immune response-regulating cell surface receptor signaling pathway negative regulation of signaling regulation of antigen receptor-mediated signaling pathway negative regulation of antigen receptor-mediated signaling pathway negative regulation of cell communication immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response positive regulation of immune system process immune response-activating cell surface receptor signaling pathway regulation of T cell receptor signaling pathway T cell receptor signaling pathway negative regulation of signal transduction negative regulation of T cell receptor signaling pathway antigen receptor-mediated signaling pathway activation of immune response ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade homophilic cell-cell adhesion common myeloid progenitor cell proliferation regulation of granulocyte differentiation negative regulation of granulocyte differentiation granulocyte differentiation positive regulation of homophilic cell adhesion regulation of homophilic cell adhesion positive regulation of cell adhesion positive regulation of cell-cell adhesion regulation of localization regulated exocytosis negative regulation of transport cell activation involved in immune response leukocyte degranulation negative regulation of cytotoxic T cell degranulation negative regulation of secretion establishment of localization in cell cytotoxic T cell degranulation negative regulation of secretion by cell regulation of secretion exocytosis cellular localization negative regulation of regulated secretory pathway negative regulation of leukocyte degranulation regulation of regulated secretory pathway secretion by cell regulation of secretion by cell T cell activation involved in immune response negative regulation of exocytosis leukocyte activation involved in immune response regulation of leukocyte degranulation lymphocyte activation involved in immune response secretion regulation of transport export from cell regulation of vesicle-mediated transport regulation of exocytosis regulation of cytotoxic T cell degranulation negative regulation of intracellular signal transduction negative regulation of JNK cascade negative regulation of MAPK cascade regulation of hepatocyte proliferation hepatocyte proliferation negative regulation of hepatocyte proliferation regulation of epithelial cell proliferation epithelial cell proliferation negative regulation of epithelial cell proliferation epithelium development endothelial cell differentiation endothelium development regulation of endothelial cell differentiation tissue development epithelial cell differentiation regulation of epithelial cell differentiation cellular response to nitrogen compound response to endogenous stimulus response to peptide hormone response to oxygen-containing compound cellular response to peptide hormone stimulus response to nitrogen compound cellular response to oxygen-containing compound cellular response to endogenous stimulus cellular response to chemical stimulus response to hormone response to insulin cellular response to insulin stimulus cellular response to hormone stimulus morphogenesis of an epithelium epiboly involved in wound healing morphogenesis of an epithelial sheet tissue morphogenesis epiboly wound healing, spreading of cells negative regulation of small molecule metabolic process oxoacid metabolic process ketone metabolic process organic acid metabolic process organic acid biosynthetic process carboxylic acid biosynthetic process regulation of small molecule metabolic process small molecule metabolic process negative regulation of fatty acid biosynthetic process fatty acid metabolic process negative regulation of fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process carboxylic acid metabolic process fatty acid biosynthetic process regulation of ketone metabolic process regulation of fatty acid metabolic process regulation of fatty acid biosynthetic process monocarboxylic acid metabolic process regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction phosphatidylinositol 3-kinase/protein kinase B signal transduction insulin catabolic process catabolic process protein catabolic process insulin metabolic process macromolecule catabolic process cell junction organization cell-cell junction organization	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane cell-cell junction anchoring junction cell junction plasma membrane bounded cell projection cell projection actin-based cell projection plasma membrane region cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane cell-cell junction anchoring junction cell junction plasma membrane bounded cell projection cell projection actin-based cell projection plasma membrane region microvillus microvillus membrane cell projection membrane adherens junction apical part of cell apical plasma membrane basal part of cell basal plasma membrane membrane-bounded organelle intracellular anatomical structure transport vesicle intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle organelle cytoplasm vesicle cilium ciliary membrane bounding membrane of organelle organelle membrane lateral plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D	IPR018548	Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus	Domain
B, D	IPR032500	Spike glycoprotein S1, N-terminal domain, betacoronavirus-like	Domain
B, D	IPR042578	Spike glycoprotein, betacoronavirus	Family
B, D	IPR036326	Spike S1 subunit, receptor binding domain superfamily, betacoronavirus	Homologous Superfamily
B, D	IPR043002	Spike glycoprotein, N-terminal domain superfamily	Homologous Superfamily
B, D	IPR044339	Spike (S) protein S1 subunit, N-terminal domain, murine hepatitis virus-like	Domain
B, D	IPR044874	Spike glycoprotein S2, coronavirus, heptad repeat 2	Domain
B, D	IPR044873	Spike glycoprotein S2, coronavirus, heptad repeat 1	Domain
B, D	IPR043473	Spike glycoprotein S2 superfamily, coronavirus	Homologous Superfamily
B, D	IPR043607	Coronavirus spike glycoprotein S1, C-terminal	Domain
B, D	IPR002552	Spike glycoprotein S2, coronavirus	Domain
A, C	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, C	IPR013106	Immunoglobulin V-set domain	Domain
A, C	IPR003599	Immunoglobulin domain subtype	Domain
A, C	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, C	IPR007110	Immunoglobulin-like domain	Domain
A, C	IPR003598	Immunoglobulin subtype 2	Domain
A, C	IPR050831	Carcinoembryonic antigen-related cell adhesion	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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.