6I97

Structure of the ferrioxamine B transporter FoxA from Pseudomonas aeruginosa in complex with ferrioxamine B and a C-terminal TonB fragment

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Ligand-gated protein channel	8100529	4003084	SCOP2 (2022-06-29)
A	SCOP2 Family	STN domain-like	8101091	4006665	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Porins	8100530	3000224	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	STN domain-like	8101092	3002388	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Porins	8100530	3000224	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	STN domain-like	8101092	3002388	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	TolA/TonB C-terminal domain-like	8071264	3000464	SCOP2B (2022-06-29)
D [auth E]	SCOP2B Superfamily	TolA/TonB C-terminal domain-like	8071264	3000464	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	TonB_dep_Rec_1	e6i97A3	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Ligand-gated protein channel	F: TonB_dep_Rec_1	ECOD (1.6)
A	STN	e6i97A1	A: a+b complex topology	X: N0 domain in phage tail proteins and secretins-like	H: N0 domain in phage tail proteins and secretins (From Topology)	T: N0 domain in phage tail proteins and secretins	F: STN	ECOD (1.6)
A	Plug	e6i97A2	A: a+b complex topology	X: N0 domain in phage tail proteins and secretins-like	H: TonB-dependent receptor plug domain (From Topology)	T: TonB-dependent receptor plug domain	F: Plug	ECOD (1.6)
B	TonB_dep_Rec_1	e6i97B2	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Ligand-gated protein channel	F: TonB_dep_Rec_1	ECOD (1.6)
B	STN	e6i97B1	A: a+b complex topology	X: N0 domain in phage tail proteins and secretins-like	H: N0 domain in phage tail proteins and secretins (From Topology)	T: N0 domain in phage tail proteins and secretins	F: STN	ECOD (1.6)
B	Plug	e6i97B3	A: a+b complex topology	X: N0 domain in phage tail proteins and secretins-like	H: TonB-dependent receptor plug domain (From Topology)	T: TonB-dependent receptor plug domain	F: Plug	ECOD (1.6)
C [auth D]	TonB_C	e6i97D1	A: a+b two layers	X: TolA/TonB C-terminal domain	H: TolA/TonB C-terminal domain (From Topology)	T: TolA/TonB C-terminal domain	F: TonB_C	ECOD (1.6)
D [auth E]	TonB_C	e6i97E1	A: a+b two layers	X: TolA/TonB C-terminal domain	H: TolA/TonB C-terminal domain (From Topology)	T: TolA/TonB C-terminal domain	F: TonB_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth D]	3.30.2420.10	Alpha Beta	2-Layer Sandwich	TolA/TonB C-terminal domain	TonB	CATH (utative)
D [auth E]	3.30.2420.10	Alpha Beta	2-Layer Sandwich	TolA/TonB C-terminal domain	TonB	CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00593	TonB dependent receptor-like, beta-barrel (TonB_dep_Rec_b-barrel)	TonB dependent receptor-like, beta-barrel	This entry represents the beta-barrel domain of TonB-dependent receptors, such as BtuB, CirA, FatA, FcuT, FecA, FepA, among others [1].	Domain
A, B	PF07715	TonB-dependent Receptor Plug Domain (Plug)	TonB-dependent Receptor Plug Domain	The Plug domain has been shown to be an independently folding subunit of the TonB-dependent receptors ([1]). It acts as the channel gate, blocking the pore until the channel is bound by ligand. At this point it under goes conformational changes opens ...	The Plug domain has been shown to be an independently folding subunit of the TonB-dependent receptors ([1]). It acts as the channel gate, blocking the pore until the channel is bound by ligand. At this point it under goes conformational changes opens the channel.	Domain
C [auth D], D [auth E]	PF03544	Gram-negative bacterial TonB protein C-terminal (TonB_C)	Gram-negative bacterial TonB protein C-terminal	The TonB_C domain is the well-characterised C-terminal region of the TonB receptor molecule. This protein is bound to an inner membrane-bound protein ExbB via a globular domain and has a flexible middle region that is likely to help in positioning th ...	The TonB_C domain is the well-characterised C-terminal region of the TonB receptor molecule. This protein is bound to an inner membrane-bound protein ExbB via a globular domain and has a flexible middle region that is likely to help in positioning the C-terminal domain into the iron-transporter barrel in the outer membrane [1]. TonB_C interacts with the N-terminal TonB box of the outer membrane transporter that binds the Fe3+-siderophore complex. The barrel of the transporter, consisting of 22 beta-sheets and an inside plug, binds the iron complex in the barrel entrance [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	TonB-dependent receptor	molecular transducer activity signaling receptor activity siderophore-iron transmembrane transporter activity siderophore uptake transmembrane transporter activity transporter activity transmembrane transporter activity	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation cellular process signal transduction cell communication siderophore transport localization transport iron ion transport cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation cellular process signal transduction cell communication siderophore transport localization transport iron ion transport transition metal ion transport monoatomic ion transport monoatomic cation transport establishment of localization metal ion transport iron coordination entity transport	cellular anatomical structure membrane outer membrane cell periphery cell outer membrane external encapsulating structure cell envelope
C [auth D], D [auth E]	Protein TonB	molecular transducer activity energy transducer activity	cellular process type IV pilus-dependent motility cell motility cellular response to stimulus cellular response to antibiotic cellular response to chemical stimulus response to stimulus response to chemical response to antibiotic protein localization establishment of protein localization cellular localization nitrogen compound transport transport cellular process type IV pilus-dependent motility cell motility cellular response to stimulus cellular response to antibiotic cellular response to chemical stimulus response to stimulus response to chemical response to antibiotic protein localization establishment of protein localization cellular localization nitrogen compound transport transport establishment of localization localization protein transport cellular macromolecule localization macromolecule localization inorganic ion homeostasis iron import into cell homeostatic process iron ion transport metal ion transport intracellular iron ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis establishment of localization in cell monoatomic ion homeostasis intracellular chemical homeostasis transition metal ion transport monoatomic ion transport monoatomic cation homeostasis monoatomic cation transport intracellular monoatomic ion homeostasis bacterial-type flagellum-dependent swarming motility bacterial-type flagellum-dependent cell motility archaeal or bacterial-type flagellum-dependent cell motility cilium or flagellum-dependent cell motility cell aggregation biofilm formation biological process involved in intraspecies interaction between organisms single-species biofilm formation aggregation of unicellular organisms siderophore transport iron coordination entity transport transmembrane transport	cell periphery protein-containing complex cellular anatomical structure plasma membrane protein complex membrane plasma membrane membrane protein complex outer membrane-bounded periplasmic space cell envelope periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR039426	TonB-dependent receptor-like	Family
A, B	IPR037066	TonB-dependent receptor, plug domain superfamily	Homologous Superfamily
A, B	IPR010105	TonB-dependent siderophore receptor	Family
A, B	IPR036942	TonB-dependent receptor-like, beta-barrel domain superfamily	Homologous Superfamily
A, B	IPR012910	TonB-dependent receptor, plug domain	Domain
A, B	IPR011662	Secretin/TonB, short N-terminal domain	Domain
A, B	IPR000531	TonB-dependent receptor-like, beta-barrel	Domain
C [auth D], D [auth E]	IPR051045	TonB-dependent transporter energy transducer	Family
C [auth D], D [auth E]	IPR006260	TonB/TolA, C-terminal	Domain
C [auth D], D [auth E]	IPR003538	Gram-negative bacterial TonB protein	Family
C [auth D], D [auth E]	IPR037682	TonB, C-terminal	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C [auth D], D [auth E]	OPM	Transmembrane	Beta-barrel transmembrane	Ligand-gated protein channels (n=22,S=24)	Outer Membrane Receptor (OMR)

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C [auth D], D [auth E]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C [auth D], D [auth E]	MemProtMD	Annotated as membrane protein by MemProtMD

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.