Annotations: 1BDJ

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1bdja_	Alpha and beta proteins (a/b)	Flavodoxin-like	CheY-like	CheY-related	CheY protein	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1bdjb_	All alpha proteins	Four-helical up-and-down bundle	Histidine-containing phosphotransfer domain, HPT domain	Aerobic respiration control sensor protein, ArcB	Aerobic respiration control sensor protein, ArcB	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	CheY-like	8034311	3001156	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Histidine-containing phosphotransfer domain HPT domain	8036953	3001634	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)
A	Response_reg	e1bdjA1	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: CheY-like	F: Response_reg	ECOD (1.6)
B	Hpt	e1bdjB1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Histidine-containing phosphotransfer domain, HPT domain (From Topology)	T: Histidine-containing phosphotransfer domain, HPT domain	F: Hpt	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
B	1.20.120.160	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	HPT domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00072	Response regulator receiver domain (Response_reg)	Response regulator receiver domain	This domain receives the signal from the sensor partner in bacterial two-component systems. It is usually found N-terminal to a DNA binding effector domain.	Domain
B	PF01627	Hpt domain (Hpt)	Hpt domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	CHEY	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding acetyltransferase activity acyltransferase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity catalytic activity molecular transducer activity phosphorelay response regulator activity	cell swimming cellular process bacterial-type flagellum-dependent cell motility bacterial-type flagellum-dependent swimming motility cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion cellular response to stimulus cell swimming cellular process bacterial-type flagellum-dependent cell motility bacterial-type flagellum-dependent swimming motility cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion cellular response to stimulus regulation of biological process phosphorelay signal transduction system regulation of cellular process signaling biological regulation intracellular signal transduction cell communication signal transduction regulation of response to external stimulus regulation of chemotaxis regulation of response to stimulus regulation of locomotion aerotaxis energy taxis regulation of bacterial-type flagellum-dependent cell motility regulation of cell motility peptidyl-lysine acetylation organonitrogen compound metabolic process peptidyl-lysine modification primary metabolic process protein acylation protein acetylation organic substance metabolic process internal peptidyl-lysine acetylation macromolecule modification peptidyl-amino acid modification nitrogen compound metabolic process metabolic process protein metabolic process macromolecule metabolic process protein modification process internal protein amino acid acetylation thermotaxis response to abiotic stimulus response to temperature stimulus	cell projection organelle cellular anatomical entity bacterial-type flagellum non-membrane-bounded organelle bacterial-type flagellum basal body bacterial-type flagellum motor bacterial-type flagellum rotor complex intracellular anatomical structure cytoplasm cytosol bacterial-type flagellum basal body, C ring
B	AEROBIC RESPIRATION CONTROL SENSOR PROTEIN ARCB	phosphoric ester hydrolase activity phosphoprotein phosphatase activity catalytic activity, acting on a protein hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity catalytic activity small molecule sensor activity kinase activity protein kinase activity transferase activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity phosphoric ester hydrolase activity phosphoprotein phosphatase activity catalytic activity, acting on a protein hydrolase activity, acting on ester bonds phosphatase activity hydrolase activity catalytic activity small molecule sensor activity kinase activity protein kinase activity transferase activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity transferase activity, transferring phosphorus-containing groups phosphorelay sensor kinase activity binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding	response to stimulus response to oxygen levels response to abiotic stimulus cellular response to stimulus regulation of biological process regulation of cellular process signaling biological regulation cellular process signal transduction cell communication protein phosphorylation organonitrogen compound metabolic process protein autophosphorylation response to stimulus response to oxygen levels response to abiotic stimulus cellular response to stimulus regulation of biological process regulation of cellular process signaling biological regulation cellular process signal transduction cell communication protein phosphorylation organonitrogen compound metabolic process protein autophosphorylation phosphorylation cellular metabolic process primary metabolic process organic substance metabolic process macromolecule modification phosphate-containing compound metabolic process nitrogen compound metabolic process metabolic process protein metabolic process macromolecule metabolic process protein modification process phosphorus metabolic process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process regulation of nitrogen compound metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process heterocycle metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process cellular nitrogen compound metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process heterocycle biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process aromatic compound biosynthetic process organic cyclic compound biosynthetic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription regulation of metabolic process cellular aromatic compound metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011006	CheY-like superfamily	Homologous Superfamily
A	IPR001789	Signal transduction response regulator, receiver domain	Domain
B	IPR027460	Aerobic respiration control sensor protein ArcB, transmembrane domain superfamily	Homologous Superfamily
B	IPR011006	CheY-like superfamily	Homologous Superfamily
B	IPR040642	Histidine kinase receptor ArcB, transmembrane domain	Domain
B	IPR003594	Histidine kinase/HSP90-like ATPase	Domain
B	IPR036890	Histidine kinase/HSP90-like ATPase superfamily	Homologous Superfamily
B	IPR003661	Signal transduction histidine kinase, dimerisation/phosphoacceptor domain	Domain
B	IPR000700	PAS-associated, C-terminal	Domain
B	IPR008207	Signal transduction histidine kinase, phosphotransfer (Hpt) domain	Domain
B	IPR013767	PAS fold	Domain
B	IPR000014	PAS domain	Domain
B	IPR004358	Signal transduction histidine kinase-related protein, C-terminal	Domain
B	IPR014409	Signal transduction histidine kinase, hybrid-type, aerobic respiration control ArcB	Family
B	IPR001789	Signal transduction response regulator, receiver domain	Domain
B	IPR036097	Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily	Homologous Superfamily
B	IPR035965	PAS domain superfamily	Homologous Superfamily
B	IPR005467	Histidine kinase domain	Domain
B	IPR036641	HPT domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.