Annotations: 6XKX

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
I [auth p]	Ribosomal_L36	e6xkxp1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
H [auth o]	Ribosomal_L36	e6xkxo1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
G [auth n]	Ribosomal_L36	e6xkxn1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
E [auth Q]	Ribosomal_L36	e6xkxQ1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
C [auth D]	Ribosomal_L36	e6xkxD1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
D [auth P]	Ribosomal_L36	e6xkxP1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
B [auth C]	Ribosomal_L36	e6xkxC1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
F [auth R]	Ribosomal_L36	e6xkxR1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)
A [auth E]	Ribosomal_L36	e6xkxE1	A: a/b three-layered sandwiches	X: CNF1/YfiH-like putative cysteine hydrolases	H: Bromodomain	T: Bromodomain	F: Ribosomal_L36	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth D], E [auth Q]	PF02167	Cytochrome C1 family (Cytochrom_C1)	Cytochrome C1 family	-	Family
B [auth C], D [auth P]	PF00032	Cytochrome b(C-terminal)/b6/petD (Cytochrom_B_C)	Cytochrome b(C-terminal)/b6/petD		Domain
B [auth C], D [auth P]	PF00033	Cytochrome b/b6/petB (Cytochrome_B)	Cytochrome b/b6/petB		Domain
B [auth C], D [auth P]	PF00034	Cytochrome c (Cytochrom_C)	Cytochrome c	The Pfam entry does not include all Prosite members. The cytochrome 556 and cytochrome c' families are not included. All these are now in a new clan together. The C-terminus of DUF989, Pfam:PF06181, has now been merged into this family.	Domain
A [auth E], F [auth R]	PF00355	Rieske [2Fe-2S] domain (Rieske)	Rieske [2Fe-2S] domain	The rieske domain has a [2Fe-2S] centre. Two conserved cysteines coordinate one Fe ion, while the other Fe ion is coordinated by two conserved histidines. In hyperthermophilic archaea there is a SKTPCX(2-3)C motif at the C-terminus. The cysteines in ...	The rieske domain has a [2Fe-2S] centre. Two conserved cysteines coordinate one Fe ion, while the other Fe ion is coordinated by two conserved histidines. In hyperthermophilic archaea there is a SKTPCX(2-3)C motif at the C-terminus. The cysteines in this motif form a disulphide bridge, which stabilises the protein [4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
I [auth p]	Cbb3-type cytochrome c oxidase subunit CcoP,Cytochrome c-type cyt cy	oxidoreductase activity catalytic activity binding tetrapyrrole binding heme binding electron transfer activity cation binding ion binding metal ion binding small molecule binding	monoatomic cation transmembrane transport transmembrane transport localization transport proton transmembrane transport monoatomic ion transmembrane transport monoatomic ion transport cellular process monoatomic cation transport establishment of localization aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds monoatomic cation transmembrane transport transmembrane transport localization transport proton transmembrane transport monoatomic ion transmembrane transport monoatomic ion transport cellular process monoatomic cation transport establishment of localization aerobic respiration cellular respiration oxidative phosphorylation energy derivation by oxidation of organic compounds metabolic process generation of precursor metabolites and energy photosynthesis	cell periphery cellular anatomical structure plasma membrane membrane
H [auth o]	Cytochrome c oxidase, Cbb3-type, subunit II	oxidoreductase activity catalytic activity binding tetrapyrrole binding heme binding electron transfer activity cation binding ion binding metal ion binding small molecule binding	-	-
G [auth n]	Cytochrome c oxidase, Cbb3-type, subunit I	oxidoreductase activity catalytic activity 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 oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity binding oxidoreductase activity catalytic activity 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 oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity binding tetrapyrrole binding heme binding cation binding ion binding metal ion binding small molecule binding	electron transport coupled proton transport transport proton transmembrane transport monoatomic ion transmembrane transport establishment of localization monoatomic cation transmembrane transport transmembrane transport localization energy coupled proton transmembrane transport, against electrochemical gradient monoatomic ion transport cellular process monoatomic cation transport aerobic respiration cellular respiration electron transport coupled proton transport transport proton transmembrane transport monoatomic ion transmembrane transport establishment of localization monoatomic cation transmembrane transport transmembrane transport localization energy coupled proton transmembrane transport, against electrochemical gradient 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 respiratory electron transport chain electron transport chain	cell periphery cellular anatomical structure plasma membrane membrane
C [auth D], E [auth Q]	Cytochrome c1	binding tetrapyrrole binding heme binding electron transfer activity cation binding ion binding metal ion binding small molecule binding	-	cell periphery cellular anatomical structure plasma membrane membrane
B [auth C], D [auth P]	Cytochrome b	oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity cation binding ion binding binding metal ion binding small molecule binding	cellular respiration energy derivation by oxidation of organic compounds respiratory electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy	respiratory chain complex protein-containing complex cellular anatomical structure cytochrome complex catalytic complex transmembrane transporter complex membrane membrane protein complex transporter complex respiratory chain complex III cell periphery plasma membrane
A [auth E], F [auth R]	Ubiquinol-cytochrome c reductase iron-sulfur subunit	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding monoatomic cation transmembrane transporter activity proton transmembrane transporter activity primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity quinol-cytochrome-c reductase activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding cation binding ion binding metal ion binding	-	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
I [auth p]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
I [auth p]	IPR009056	Cytochrome c-like domain	Domain
I [auth p]	IPR032858	Cbb3-type cytochrome c oxidase subunit CcoP, N-terminal	Domain
I [auth p]	IPR004678	Cytochrome c oxidase cbb3-type, subunit III	Family
I [auth p]	IPR050597	Cytochrome c Oxidase Subunit	Family
I [auth p]	IPR038414	Cbb3-type cytochrome c oxidase subunit CcoP, N-terminal domain superfamily	Homologous Superfamily
I [auth p]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
I [auth p]	IPR009056	Cytochrome c-like domain	Domain
I [auth p]	IPR002327	Cytochrome c, class IA/ IB	Family
H [auth o]	IPR003468	Cytochrome c oxidase, monohaem subunit/FixO	Family
H [auth o]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
H [auth o]	IPR009056	Cytochrome c-like domain	Domain
G [auth n]	IPR036927	Cytochrome c oxidase-like, subunit I superfamily	Homologous Superfamily
G [auth n]	IPR000883	Cytochrome c oxidase subunit I	Family
G [auth n]	IPR004677	Cytochrome c oxidase cbb3-type, subunit I	Family
G [auth n]	IPR023615	Cytochrome c oxidase, subunit I, copper-binding site	Binding Site
G [auth n]	IPR023616	Cytochrome c oxidase-like, subunit I domain	Domain
C [auth D], E [auth Q]	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
C [auth D], E [auth Q]	IPR002326	Cytochrome c1	Family
C [auth D], E [auth Q]	IPR009056	Cytochrome c-like domain	Domain
B [auth C], D [auth P]	IPR036150	Cytochrome b/b6, C-terminal domain superfamily	Homologous Superfamily
B [auth C], D [auth P]	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
B [auth C], D [auth P]	IPR048260	Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial	Domain
B [auth C], D [auth P]	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
B [auth C], D [auth P]	IPR005798	Cytochrome b/b6, C-terminal	Domain
B [auth C], D [auth P]	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
B [auth C], D [auth P]	IPR030689	Cytochrome b	Family
B [auth C], D [auth P]	IPR005797	Cytochrome b/b6, N-terminal domain	Domain
A [auth E], F [auth R]	IPR017941	Rieske [2Fe-2S] iron-sulphur domain	Domain
A [auth E], F [auth R]	IPR005805	Rieske iron-sulphur protein, C-terminal	Domain
A [auth E], F [auth R]	IPR036922	Rieske [2Fe-2S] iron-sulphur domain superfamily	Homologous Superfamily
A [auth E], F [auth R]	IPR006311	Twin-arginine translocation pathway, signal sequence	Conserved Site
A [auth E], F [auth R]	IPR014349	Rieske iron-sulphur protein	Family
A [auth E], F [auth R]	IPR019470	Ubiquitinol-cytochrome C reductase, Fe-S subunit, TAT signal	Domain
A [auth E], F [auth R]	IPR006317	Ubiquinol-cytochrome c reductase, iron-sulphur subunit	Domain
A [auth E], F [auth R]	IPR019546	Twin-arginine translocation pathway, signal sequence, bacterial/archaeal	Conserved Site

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth E], B [auth C], C [auth D], D [auth P], E [auth Q] A [auth E], B [auth C], C [auth D], D [auth P], E [auth Q], F [auth R], G [auth n], H [auth o], I [auth p]	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex IV (cytochrome c oxidase)	Respiratory supercomplexes III-IV

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth E], B [auth C], C [auth D], D [auth P], E [auth Q] A [auth E], B [auth C], C [auth D], D [auth P], E [auth Q], F [auth R], G [auth n], H [auth o], I [auth p]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth E], B [auth C], C [auth D], D [auth P], E [auth Q] A [auth E], B [auth C], C [auth D], D [auth P], E [auth Q], F [auth R], G [auth n], H [auth o], I [auth p]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Supercomplexes (Respirasome)	Respiratory supercomplex III₂-IV. CIII₂