3MK7

The structure of CBB3 cytochrome oxidase

External Resource: Annotation

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
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	COX1	e3mk7A1	A: alpha superhelices	X: Cytochrome c oxidase subunit I-like	H: Cytochrome c oxidase subunit I-like (From Topology)	T: Cytochrome c oxidase subunit I-like	F: COX1	ECOD (1.6)
D	COX1	e3mk7D1	A: alpha superhelices	X: Cytochrome c oxidase subunit I-like	H: Cytochrome c oxidase subunit I-like (From Topology)	T: Cytochrome c oxidase subunit I-like	F: COX1	ECOD (1.6)
G	COX1	e3mk7G1	A: alpha superhelices	X: Cytochrome c oxidase subunit I-like	H: Cytochrome c oxidase subunit I-like (From Topology)	T: Cytochrome c oxidase subunit I-like	F: COX1	ECOD (1.6)
J [auth K]	COX1	e3mk7K1	A: alpha superhelices	X: Cytochrome c oxidase subunit I-like	H: Cytochrome c oxidase subunit I-like (From Topology)	T: Cytochrome c oxidase subunit I-like	F: COX1	ECOD (1.6)
H	FixO	e3mk7H1	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: FixO	ECOD (1.6)
B	FixO	e3mk7B1	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: FixO	ECOD (1.6)
E	FixO	e3mk7E1	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: FixO	ECOD (1.6)
K [auth L]	FixO	e3mk7L1	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: FixO	ECOD (1.6)
I	Cytochrome_CBB3	e3mk7I2	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: Cytochrome_CBB3	ECOD (1.6)
I	FixP_N	e3mk7I3	A: extended segments	X: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	H: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	T: Cytochrome c oxidase subunit II-like, transmembrane region	F: FixP_N	ECOD (1.6)
L [auth M]	Cytochrome_CBB3	e3mk7M2	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: Cytochrome_CBB3	ECOD (1.6)
L [auth M]	FixP_N	e3mk7M3	A: extended segments	X: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	H: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	T: Cytochrome c oxidase subunit II-like, transmembrane region	F: FixP_N	ECOD (1.6)
C	Cytochrome_CBB3	e3mk7C2	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: Cytochrome_CBB3	ECOD (1.6)
C	FixP_N	e3mk7C3	A: extended segments	X: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	H: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	T: Cytochrome c oxidase subunit II-like, transmembrane region	F: FixP_N	ECOD (1.6)
F	Cytochrome_CBB3	e3mk7F2	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: Cytochrome_CBB3	ECOD (1.6)
F	FixP_N	e3mk7F3	A: extended segments	X: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	H: Cytochrome c oxidase subunit II-like, transmembrane region (From Topology)	T: Cytochrome c oxidase subunit II-like, transmembrane region	F: FixP_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.210.10	Mainly Alpha	Up-down Bundle	Cytochrome C Oxidase	Chain A	CATH (4.3.0)
D	1.20.210.10	Mainly Alpha	Up-down Bundle	Cytochrome C Oxidase	Chain A	CATH (4.3.0)
G	1.20.210.10	Mainly Alpha	Up-down Bundle	Cytochrome C Oxidase	Chain A	CATH (4.3.0)
J [auth K]	1.20.210.10	Mainly Alpha	Up-down Bundle	Cytochrome C Oxidase	Chain A	CATH (4.3.0)
H	6.10.250.2250	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
H	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
B	6.10.250.2250	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
B	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
E	6.10.250.2250	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
E	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
K [auth L]	6.10.250.2250	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
K [auth L]	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
I	6.10.280.130	Special	Helix non-globular	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
I	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
L [auth M]	6.10.280.130	Special	Helix non-globular	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
L [auth M]	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
C	6.10.280.130	Special	Helix non-globular	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
C	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)
F	6.10.280.130	Special	Helix non-globular	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
F	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D, G, J [auth K]	PF00115	Cytochrome C and Quinol oxidase polypeptide I (COX1)	Cytochrome C and Quinol oxidase polypeptide I	-	Family
C, F, I, L [auth M]	PF14715	N-terminal domain of cytochrome oxidase-cbb3, FixP (FixP_N)	N-terminal domain of cytochrome oxidase-cbb3, FixP	This is the N-terminal domain of FixP, the cytochrome oxidase type-cbb3. the exact function is not known.	Domain
C, F, I, L [auth M]	PF13442	Cytochrome C oxidase, cbb3-type, subunit III (Cytochrome_CBB3)	Cytochrome C oxidase, cbb3-type, subunit III	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, D, G, J [auth K]	Cytochrome c oxidase, cbb3-type, subunit N	oxygen binding binding small molecule binding monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreductase activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity oxidoreductase activity, acting on a heme group of donors oxygen binding binding small molecule binding monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity cytochrome-c oxidase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreductase activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity oxidoreductase activity, acting on a heme group of donors inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity catalytic activity oxidoreductase activity, acting on diphenols and related substances as donors ubiquinol-cytochrome-c reductase activity organic cyclic compound binding tetrapyrrole binding heme binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen copper ion binding	transport proton transmembrane transport monoatomic ion transmembrane transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport cellular process monoatomic cation transport electron transport coupled proton transport energy coupled proton transmembrane transport, against electrochemical gradient transport proton transmembrane transport monoatomic ion transmembrane transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport cellular process monoatomic cation transport electron transport coupled proton transport energy coupled proton transmembrane transport, against electrochemical gradient aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process generation of precursor metabolites and energy aerobic electron transport chain respiratory electron transport chain electron transport chain energy derivation by oxidation of reduced inorganic compounds aerobic respiration, using ferrous ions as electron donor	cell periphery cellular anatomical structure plasma membrane membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex
B, E, H, K [auth L]	Cytochrome c oxidase, cbb3-type, subunit O	binding organic cyclic compound binding tetrapyrrole binding heme binding electron transfer activity cation binding ion binding metal ion binding small molecule binding	-	cellular anatomical structure membrane protein-containing complex cytochrome complex catalytic complex
C, F, I, L [auth M]	Cytochrome c oxidase, cbb3-type, subunit P	oxidoreductase activity catalytic activity binding organic cyclic compound binding tetrapyrrole binding heme binding electron transfer activity cation binding ion binding metal ion binding small molecule binding	transport proton transmembrane transport monoatomic ion transmembrane transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport cellular process monoatomic cation transport aerobic respiration cellular respiration transport proton transmembrane transport monoatomic ion transmembrane transport inorganic ion transmembrane transport establishment of localization inorganic cation transmembrane transport transmembrane transport monoatomic cation transmembrane transport localization monoatomic ion transport cellular process monoatomic cation transport aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process generation of precursor metabolites and energy	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex cytochrome complex catalytic complex
M [auth U], N [auth X], O [auth Y], P [auth Z]	30-mer peptide	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D, G, J [auth K]	IPR036927	Cytochrome c oxidase-like, subunit I superfamily	Homologous Superfamily
A, D, G, J [auth K]	IPR000883	Cytochrome c oxidase subunit I	Family
A, D, G, J [auth K]	IPR004677	Cytochrome c oxidase cbb3-type, subunit I	Family
A, D, G, J [auth K]	IPR023615	Cytochrome c oxidase, subunit I, copper-binding site	Binding Site
A, D, G, J [auth K]	IPR023616	Cytochrome c oxidase-like, subunit I domain	Domain
B, E, H, K [auth L]	IPR003468	Cytochrome c oxidase, monohaem subunit/FixO	Family
B, E, H, K [auth L]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
B, E, H, K [auth L]	IPR009056	Cytochrome c-like domain	Domain
C, F, I, L [auth M]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
C, F, I, L [auth M]	IPR009056	Cytochrome c-like domain	Domain
C, F, I, L [auth M]	IPR032858	Cbb3-type cytochrome c oxidase subunit CcoP, N-terminal	Domain
C, F, I, L [auth M]	IPR004678	Cytochrome c oxidase cbb3-type, subunit III	Family
C, F, I, L [auth M]	IPR050597	Cytochrome c Oxidase Subunit	Family
C, F, I, L [auth M]	IPR038414	Cbb3-type cytochrome c oxidase subunit CcoP, N-terminal domain superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D, E A, B, C, D, E, F, G, H, I, J [auth K], K [auth L], L [auth M]	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex IV (cytochrome c oxidase)	Cytochrome c oxidases

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, F, G, H, I, J [auth K], K [auth L], L [auth M]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, F, G, H, I, J [auth K], K [auth L], L [auth M]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E A, B, C, D, E, F, G, H, I, J [auth K], K [auth L], L [auth M]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)	Cytochrome Oxidase, cbb₃