Annotations: 3ATP

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3atpa_	All alpha proteins	Four-helical up-and-down bundle	Aspartate receptor, ligand-binding domain	automated matches	automated matches	(Escherichia coli str. K-12 substr. W3110 ) [TaxId: 316407 ],	SCOPe (2.08)
B	d3atpb_	All alpha proteins	Four-helical up-and-down bundle	Aspartate receptor, ligand-binding domain	automated matches	automated matches	(Escherichia coli str. K-12 substr. W3110 ) [TaxId: 316407 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Chemoreceptors ligand-binding domain	8018626	3001511	SCOP2B (2021-05-27)
B	SCOP2B Superfamily	Chemoreceptors ligand-binding domain	8018626	3001511	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	PF02203	e3atpA1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Histidine kinase associated sensor domains (From Topology)	T: Histidine kinase associated sensor domains	F: PF02203	ECOD (1.6)
B	PF02203	e3atpB1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Histidine kinase associated sensor domains (From Topology)	T: Histidine kinase associated sensor domains	F: PF02203	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.120.30	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Aspartate receptor, ligand-binding domain	CATH (4.3.0)
B	1.20.120.30	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	Aspartate receptor, ligand-binding domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Methyl-accepting chemotaxis protein I	identical protein binding protein binding binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity	chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion regulation of cellular process regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation regulation of protein histidine kinase activity regulation of transferase activity regulation of primary metabolic process regulation of phosphate metabolic process chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion regulation of cellular process regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation regulation of protein histidine kinase activity regulation of transferase activity regulation of primary metabolic process regulation of phosphate metabolic process phosphate-containing compound metabolic process protein metabolic process phosphorus metabolic process protein modification process regulation of biological process organonitrogen compound metabolic process protein phosphorylation phosphorylation cellular metabolic process regulation of protein metabolic process biological regulation regulation of cellular metabolic process primary metabolic process regulation of protein kinase activity regulation of macromolecule metabolic process regulation of molecular function regulation of kinase activity macromolecule modification regulation of phosphorylation regulation of phosphorus metabolic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process regulation of response to external stimulus regulation of chemotaxis regulation of response to stimulus regulation of locomotion cellular response to acid chemical cellular response to stimulus cellular response to amino acid stimulus response to acid chemical cellular response to chemical stimulus response to amino acid regulation of bacterial-type flagellum-dependent cell motility regulation of cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility bacterial-type flagellum-dependent cell motility cell motility regulation of signaling protein-containing complex organization signaling regulation of signal transduction cell communication cellular component organization cellular component biogenesis signal complex assembly cellular component assembly protein-containing complex assembly regulation of cell communication cellular component organization or biogenesis signal transduction protein localization localization cellular localization receptor clustering cellular macromolecule localization macromolecule localization localization within membrane protein localization to membrane detection of stimulus detection of chemical stimulus	protein-containing complex methyl accepting chemotaxis protein complex cell periphery plasma membrane membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR003122	Chemotaxis methyl-accepting receptor Tar-related, ligand-binding	Domain
A, B	IPR004090	Chemotaxis methyl-accepting receptor	Family
A, B	IPR003660	HAMP domain	Domain
A, B	IPR035440	Methyl-accepting chemotaxis protein, four helix bundle domain superfamily	Homologous Superfamily
A, B	IPR004091	Chemotaxis methyl-accepting receptor, methyl-accepting site	PTM
A, B	IPR004089	Methyl-accepting chemotaxis protein (MCP) signalling domain	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 R01GM133198.