Annotations: 7NSU

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Porins	8033399	3000224	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Porins	8033399	3000224	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Porins	8033399	3000224	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	YWTD domain-like	8042387	3000494	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	TolB N-terminal domain-like	8042388	3000482	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Porins	8042029	3000224	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	PF00267	e7nsuA1	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Porin	F: PF00267	ECOD (1.6)
B	PF00267	e7nsuB1	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Porin	F: PF00267	ECOD (1.6)
C	PF00267	e7nsuC1	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Porin	F: PF00267	ECOD (1.6)
E	PF07676	e7nsuE1	A: beta duplicates or obligate multimers	X: beta-propeller-like	H: beta-propeller	T: 6-bladed	F: PF07676	ECOD (1.6)
E	PF04052	e7nsuE2	A: a/b three-layered sandwiches	X: TolB, N-terminal domain (From Topology)	H: TolB, N-terminal domain (From Topology)	T: TolB, N-terminal domain	F: PF04052	ECOD (1.6)
F	PF00593	e7nsuF1	A: beta barrels	X: Outer membrane meander beta-barrels	H: Porins	T: Ligand-gated protein channel	F: PF00593	ECOD (1.6)
F	PF07715	e7nsuF2	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: PF07715	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF00267	Gram-negative porin (Porin_1)	Gram-negative porin	-	Domain
D	PF03515	Colicin-like bacteriocin tRNase domain (Cloacin)	Colicin-like bacteriocin tRNase domain	-	Family
D	PF11570	Coiled-coil receptor-binding R-domain of colicin E2 (E2R135)	Coiled-coil receptor-binding R-domain of colicin E2	-	Coiled-coil
E	PF04052	TolB amino-terminal domain (TolB_N)	TolB amino-terminal domain	TolB is an essential periplasmic component of the tol-dependent translocation system. This function of this amino terminal domain is uncertain.	Domain
E	PF07676	WD40-like Beta Propeller Repeat (PD40)	WD40-like Beta Propeller Repeat	-	Repeat
F	PF00593	TonB dependent receptor (TonB_dep_Rec)	TonB dependent receptor	-	Family
F	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	Outer membrane protein F	wide pore channel activity passive transmembrane transporter activity channel activity porin activity transporter activity transmembrane transporter activity binding lipid binding lipopolysaccharide binding carbohydrate derivative binding monoatomic ion channel activity monoatomic ion transmembrane transporter activity xenobiotic transmembrane transporter activity amide transmembrane transporter activity wide pore channel activity passive transmembrane transporter activity channel activity porin activity transporter activity transmembrane transporter activity binding lipid binding lipopolysaccharide binding carbohydrate derivative binding monoatomic ion channel activity monoatomic ion transmembrane transporter activity xenobiotic transmembrane transporter activity amide transmembrane transporter activity colicin transmembrane transporter activity bacteriocin transmembrane transporter activity disordered domain specific binding protein binding protein domain specific binding identical protein binding	transmembrane transport localization transport monoatomic ion transmembrane transport monoatomic ion transport cellular process establishment of localization protein-containing complex organization protein trimerization cellular component organization cellular component biogenesis cellular component assembly protein homotrimerization protein complex oligomerization transmembrane transport localization transport monoatomic ion transmembrane transport monoatomic ion transport cellular process establishment of localization protein-containing complex organization protein trimerization cellular component organization cellular component biogenesis cellular component assembly protein homotrimerization protein complex oligomerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis	membrane cellular anatomical entity protein-containing complex transmembrane transporter complex membrane protein complex transporter complex monoatomic ion channel complex pore complex cell periphery cell outer membrane external encapsulating structure cell envelope outer membrane
D	Colicin-E9	protein binding binding protein domain specific binding endonuclease activity nuclease activity hydrolase activity, acting on ester bonds hydrolase activity catalytic activity cation binding ion binding metal ion binding small molecule binding	biological process involved in interspecies interaction between organisms cellular process disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing response to stimulus response to other organism defense response response to external stimulus response to biotic stimulus defense response to bacterium defense response to other organism response to stress biological process involved in interspecies interaction between organisms cellular process disruption of cell in another organism disruption of anatomical structure in another organism killing of cells of another organism cell killing response to stimulus response to other organism defense response response to external stimulus response to biotic stimulus defense response to bacterium defense response to other organism response to stress response to bacterium response to external biotic stimulus	intracellular anatomical structure extrachromosomal circular DNA cellular anatomical entity extrachromosomal DNA protein-containing complex
E	Tol-Pal system protein TolB	protein binding binding protein domain specific binding protein-containing complex binding	cellular process cell cycle protein localization protein import establishment of protein localization cellular localization nitrogen compound transport transport organic substance transport establishment of localization localization protein transport cellular macromolecule localization macromolecule localization cellular process cell cycle protein localization protein import establishment of protein localization cellular localization nitrogen compound transport transport organic substance transport establishment of localization localization protein transport cellular macromolecule localization macromolecule localization amide transport bacteriocin transport cell division membrane organization cellular component organization regulation of biological process regulation of cellular component organization regulation of cellular process biological regulation membrane invagination regulation of membrane invagination cellular component organization or biogenesis cellular response to stimulus cellular response to nitrogen compound response to bacteriocin response to organic substance response to stimulus response to organonitrogen compound response to endogenous stimulus response to oxygen-containing compound response to nitrogen compound response to antibiotic cellular response to oxygen-containing compound cellular response to antibiotic cellular response to endogenous stimulus cellular response to chemical stimulus cellular response to organonitrogen compound cellular response to bacteriocin response to chemical cellular response to organic substance	membrane cellular anatomical entity cell division site periplasmic space outer membrane-bounded periplasmic space cell envelope protein-containing complex
F	Vitamin B12 transporter BtuB	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding wide pore channel activity passive transmembrane transporter activity channel activity porin activity transporter activity transmembrane transporter activity protein binding protein domain specific binding cation binding ion binding binding calcium ion binding metal ion binding small molecule binding wide pore channel activity passive transmembrane transporter activity channel activity porin activity transporter activity transmembrane transporter activity protein binding protein domain specific binding ABC-type vitamin B12 transporter activity ABC-type transporter activity active transmembrane transporter activity vitamin transmembrane transporter activity primary active transmembrane transporter activity ATPase-coupled transmembrane transporter activity ATP-dependent activity	localization nitrogen compound transport transport vitamin transport organic substance transport cobalamin transport establishment of localization transmembrane transport monoatomic ion transmembrane transport monoatomic ion transport cellular process	membrane cellular anatomical entity protein-containing complex transmembrane transporter complex membrane protein complex transporter complex pore complex cell periphery cell outer membrane external encapsulating structure cell envelope outer membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR001897	Porin, gammaproteobacterial	Family
A, B, C	IPR033900	Porin domain, Gram-negative type	Domain
A, B, C	IPR023614	Porin domain superfamily	Homologous Superfamily
A, B, C	IPR001702	Porin, Gram-negative type	Family
A, B, C	IPR013793	Porin, Gram-negative type, conserved site	Conserved Site
D	IPR024575	Cloacin/colicin	Family
D	IPR016128	Pyosin/cloacin translocation domain	Domain
D	IPR044925	His-Me finger superfamily	Homologous Superfamily
D	IPR024566	Colicin, receptor domain	Domain
D	IPR036302	Pyosin/cloacin translocation domain superfamily	Homologous Superfamily
D	IPR037146	Colicin/pyocin, DNase domain superfamily	Homologous Superfamily
E	IPR011042	Six-bladed beta-propeller, TolB-like	Homologous Superfamily
E	IPR007195	TolB, N-terminal	Domain
E	IPR011659	WD40-like beta propeller	Repeat
E	IPR014167	Tol-Pal system protein TolB	Family
F	IPR039426	TonB-dependent receptor-like	Family
F	IPR037066	TonB-dependent receptor, plug domain superfamily	Homologous Superfamily
F	IPR010917	TonB-dependent receptor, conserved site	Conserved Site
F	IPR036942	TonB-dependent receptor-like, beta-barrel domain superfamily	Homologous Superfamily
F	IPR012910	TonB-dependent receptor, plug domain	Domain
F	IPR010916	TonB box, conserved site	Conserved Site
F	IPR010101	TonB-dependent vitamin B12 transporter BtuB	Family
F	IPR000531	TonB-dependent receptor-like, beta-barrel	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, E, F	OPM	Transmembrane	Beta-barrel transmembrane	Trimeric porins (n=16,S=20)	General Bacterial Porin (GBP)

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, E, F	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, E, F	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, E, F	mpstruc	TRANSMEMBRANE PROTEINS: BETA-BARREL	Beta-Barrel Membrane Proteins: Porins and Relatives	OmpF and BtuB Porin in complex with colicin E9 (colE9)