Annotations: 9DDQ

E. coli TonB-ExbBD TonB bound to ExbB chain A

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H [auth Z]	WD40	e9ddqZ1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
G [auth Y]	WD40	e9ddqY1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
E	WD40	e9ddqE1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
D	WD40	e9ddqD1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
C	WD40	e9ddqC1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
B	WD40	e9ddqB1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
A	WD40	e9ddqA1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E	PF01618	MotA/TolQ/ExbB proton channel family (MotA_ExbB)	MotA/TolQ/ExbB proton channel family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
G [auth Y], H [auth Z]	Biopolymer transport protein ExbD	molecular transducer activity energy transducer activity identical protein binding protein binding binding protein homodimerization activity protein dimerization activity transporter activity transmembrane transporter activity	intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis regulation of protein stability biological regulation regulation of biological quality protein stabilization intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis regulation of protein stability biological regulation regulation of biological quality protein stabilization localization nitrogen compound transport transport bacteriocin transport establishment of localization vitamin transport cobalamin transport establishment of protein localization protein transport macromolecule localization intracellular protein localization	cellular anatomical structure membrane cell periphery protein-containing complex plasma membrane protein complex plasma membrane membrane protein complex cell outer membrane external encapsulating structure extracellular region cell envelope outer membrane
F	Protein TonB	molecular transducer activity energy transducer activity protein binding binding protein domain specific binding	intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis localization nitrogen compound transport transport vitamin transport intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis localization nitrogen compound transport transport vitamin transport cobalamin transport establishment of localization establishment of protein localization protein transport macromolecule localization intracellular protein localization virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host receptor-mediated bacteriophage irreversible attachment to host cell biological process involved in interaction with host biological process involved in symbiotic interaction receptor-mediated virion attachment to host cell entry receptor-mediated virion attachment to host cell viral process siderophore transport iron ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport metal ion transport iron coordination entity transport transmembrane transport cellular process colicin transport bacteriocin transport	cellular anatomical structure membrane cell periphery protein-containing complex plasma membrane protein complex plasma membrane membrane protein complex extracellular region outer membrane-bounded periplasmic space cell envelope periplasmic space cell outer membrane external encapsulating structure outer membrane
A, B, C, D, E	Biopolymer transport protein ExbB	molecular transducer activity energy transducer activity transporter activity transmembrane transporter activity identical protein binding protein binding binding	intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis protein import localization establishment of protein localization protein transport intracellular iron ion homeostasis inorganic ion homeostasis cellular homeostasis chemical homeostasis homeostatic process intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis protein import localization establishment of protein localization protein transport transport macromolecule localization intracellular protein localization establishment of localization regulation of protein stability biological regulation regulation of biological quality protein stabilization nitrogen compound transport bacteriocin transport vitamin transport cobalamin transport siderophore-iron import into cell import into cell cellular localization iron import into cell ferric-hydroxamate import into cell metal ion transport ferrichrome import into cell establishment of localization in cell monoatomic ion transport monoatomic cation transport siderophore-dependent iron import pathway iron ion transport transition metal ion transport cellular process iron coordination entity transport	cellular anatomical structure membrane cell periphery protein-containing complex plasma membrane protein complex plasma membrane membrane protein complex cell outer membrane external encapsulating structure extracellular region cell envelope outer membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
G [auth Y], H [auth Z]	IPR014170	TonB system transport protein ExbD type-1	Family
G [auth Y], H [auth Z]	IPR003400	Biopolymer transport protein ExbD/TolR	Family
F	IPR051045	TonB-dependent transporter energy transducer	Family
F	IPR006260	TonB/TolA, C-terminal	Domain
F	IPR003538	Gram-negative bacterial TonB protein	Family
F	IPR049924	TonB, proline-rich region	Domain
F	IPR037682	TonB, C-terminal	Domain
A, B, C, D, E	IPR014164	TonB-system energizer ExbB type-1	Family
A, B, C, D, E	IPR002898	MotA/TolQ/ExbB proton channel	Domain
A, B, C, D, E	IPR050790	ExbB/TolQ Biopolymer Transport	Family

RCSB PDB is hosted by

RCSB PDB is a member of

RCSB Partners
Nucleic Acid Knowledgebase

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.

9DDQ | pdb_00009ddq

E. coli TonB-ExbBD TonB bound to ExbB chain A

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage