6Q9E | pdb_00006q9e

Complex III2 focused refinement from Ovine respiratory supercomplex I+III2

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
F [auth d1]	SCOP2B Superfamily	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8068579	3000797	SCOP2B (2022-06-29)
P [auth d2]	SCOP2B Superfamily	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8068579	3000797	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)
C [auth b1]	Cytochrom_B_C	e6q9eb11	A: alpha bundles	X: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: Cytochrom_B_C	ECOD (1.6)
C [auth b1]	Cytochrome_B	e6q9eb12	A: alpha bundles	X: Transmembrane heme-binding four-helical bundle (From Homology)	H: Transmembrane heme-binding four-helical bundle	T: Transmembrane di-heme cytochromes	F: Cytochrome_B	ECOD (1.6)
M [auth b2]	Cytochrom_B_C	e6q9eb21	A: alpha bundles	X: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: Cytochrom_B_C	ECOD (1.6)
M [auth b2]	Cytochrome_B	e6q9eb22	A: alpha bundles	X: Transmembrane heme-binding four-helical bundle (From Homology)	H: Transmembrane heme-binding four-helical bundle	T: Transmembrane di-heme cytochromes	F: Cytochrome_B	ECOD (1.6)
G [auth q1]	UcrQ	e6q9eq11	A: extended segments	X: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UcrQ	ECOD (1.6)
Q [auth q2]	UcrQ	e6q9eq21	A: extended segments	X: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UcrQ	ECOD (1.6)
H [auth h1]	UCR_hinge	e6q9eh11	A: alpha bundles	X: cytochrome bc1 complex 11 kDa protein-like	H: Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UCR_hinge	ECOD (1.6)
R [auth h2]	UCR_hinge	e6q9eh21	A: alpha bundles	X: cytochrome bc1 complex 11 kDa protein-like	H: Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UCR_hinge	ECOD (1.6)
F [auth d1]	UCR_14kD	e6q9ed11	A: alpha arrays	X: 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UCR_14kD	ECOD (1.6)
P [auth d2]	UCR_14kD	e6q9ed21	A: alpha arrays	X: 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: 14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UCR_14kD	ECOD (1.6)
O [auth f2]	Rieske_cytochrome_bc1,Rieske_6	e6q9ef21	A: beta sandwiches	X: ISP domain (From Topology)	H: ISP domain (From Topology)	T: ISP domain	F: Rieske_cytochrome_bc1,Rieske_6	ECOD (1.6)
O [auth f2]	UCR_TM	e6q9ef22	A: extended segments	X: iron-sulfur subunit (ISP) transmembrane anchor (From Topology)	H: iron-sulfur subunit (ISP) transmembrane anchor (From Topology)	T: iron-sulfur subunit (ISP) transmembrane anchor	F: UCR_TM	ECOD (1.6)
E [auth f1]	Rieske_cytochrome_bc1,Rieske_6	e6q9ef11	A: beta sandwiches	X: ISP domain (From Topology)	H: ISP domain (From Topology)	T: ISP domain	F: Rieske_cytochrome_bc1,Rieske_6	ECOD (1.6)
E [auth f1]	UCR_TM	e6q9ef12	A: extended segments	X: iron-sulfur subunit (ISP) transmembrane anchor (From Topology)	H: iron-sulfur subunit (ISP) transmembrane anchor (From Topology)	T: iron-sulfur subunit (ISP) transmembrane anchor	F: UCR_TM	ECOD (1.6)
D [auth c1]	Cytochrom_C1_N	e6q9ec11	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: Cytochrom_C1_N	ECOD (1.6)
D [auth c1]	Cytochrom_C1_C	e6q9ec12	A: extended segments	X: cytochrome c1 transmembrane anchor (From Topology)	H: cytochrome c1 transmembrane anchor (From Topology)	T: cytochrome c1 transmembrane anchor	F: Cytochrom_C1_C	ECOD (1.6)
N [auth c2]	Cytochrom_C1_N	e6q9ec21	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: Cytochrom_C1_N	ECOD (1.6)
N [auth c2]	Cytochrom_C1_C	e6q9ec22	A: extended segments	X: cytochrome c1 transmembrane anchor (From Topology)	H: cytochrome c1 transmembrane anchor (From Topology)	T: cytochrome c1 transmembrane anchor	F: Cytochrom_C1_C	ECOD (1.6)
L [auth a4]	Peptidase_M16_C	e6q9ea41	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16_C	ECOD (1.6)
L [auth a4]	Peptidase_M16	e6q9ea42	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16	ECOD (1.6)
B [auth a2]	Peptidase_M16_C	e6q9ea22	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16_C	ECOD (1.6)
B [auth a2]	Peptidase_M16	e6q9ea21	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16	ECOD (1.6)
J [auth i1]	UCR_UQCRX_QCR9	e6q9ei11	A: extended segments	X: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UCR_UQCRX_QCR9	ECOD (1.6)
T [auth i2]	UCR_UQCRX_QCR9	e6q9ei21	A: extended segments	X: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	H: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) (From Topology)	T: Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	F: UCR_UQCRX_QCR9	ECOD (1.6)
K [auth a3]	Peptidase_M16_C	e6q9ea31	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16_C	ECOD (1.6)
K [auth a3]	Peptidase_M16	e6q9ea32	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16	ECOD (1.6)
A [auth a1]	Peptidase_M16_C	e6q9ea12	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16_C	ECOD (1.6)
A [auth a1]	Peptidase_M16	e6q9ea11	A: a+b two layers	X: LuxS, MPP, ThrRS/AlaRS common domain	H: LuxS, MPP, ThrRS/AlaRS common domain	T: LuxS/MPP-like metallohydrolase	F: Peptidase_M16	ECOD (1.6)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth b1], M [auth b2]	Cytochrome b	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 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	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
G [auth q1], Q [auth q2]	Ubiquinol-cytochrome c reductase complex III subunit VII	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
I [auth x1], S [auth x2]	Cytochrome b-c1 complex subunit Rieske, mitochondrial	-	-	-
H [auth h1], R [auth h2]	Cytochrome b-c1 complex subunit 6	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm organelle membrane respiratory chain complex protein-containing complex
F [auth d1], P [auth d2]	Cytochrome b-c1 complex subunit 7	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III
E [auth f1], O [auth f2]	Cytochrome b-c1 complex subunit Rieske, mitochondrial	-	-	-
D [auth c1], N [auth c2]	Cytochrome c1	-	-	-
B [auth a2], L [auth a4]	Ubiquinol-cytochrome c reductase core protein 2	-	-	-
J [auth i1], T [auth i2]	Ubiquinol-cytochrome c reductase, complex III subunit X	-	-	-
A [auth a1], K [auth a3]	Ubiquinol-cytochrome c reductase core protein 1	ubiquitin protein ligase binding protein binding binding ubiquitin-like protein ligase binding enzyme binding cation binding ion binding metal ion binding small molecule binding	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds ATP synthesis coupled electron transport electron transport chain generation of precursor metabolites and energy mitochondrial electron transport, ubiquinol to cytochrome c respiratory electron transport chain metabolic process cellular process mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope cellular anatomical structure organelle mitochondrial envelope cytoplasm organelle membrane respiratory chain complex protein-containing complex cytochrome complex catalytic complex transmembrane transporter complex membrane protein complex transporter complex respiratory chain complex III

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth b1], M [auth b2]	IPR036150	Cytochrome b/b6, C-terminal domain superfamily	Homologous Superfamily
C [auth b1], M [auth b2]	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
C [auth b1], M [auth b2]	IPR048260	Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial	Domain
C [auth b1], M [auth b2]	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
C [auth b1], M [auth b2]	IPR005798	Cytochrome b/b6, C-terminal	Domain
C [auth b1], M [auth b2]	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
C [auth b1], M [auth b2]	IPR030689	Cytochrome b	Family
C [auth b1], M [auth b2]	IPR005797	Cytochrome b/b6, N-terminal domain	Domain
G [auth q1], Q [auth q2]	IPR004205	Cytochrome b-c1 complex subunit 8	Family
G [auth q1], Q [auth q2]	IPR036642	Cytochrome b-c1 complex subunit 8 superfamily	Homologous Superfamily
H [auth h1], R [auth h2]	IPR003422	Cytochrome b-c1 complex, subunit 6	Family
H [auth h1], R [auth h2]	IPR023184	Ubiquinol-cytochrome C reductase hinge domain	Domain
H [auth h1], R [auth h2]	IPR036811	Ubiquinol-cytochrome C reductase hinge domain superfamily	Homologous Superfamily
F [auth d1], P [auth d2]	IPR003197	Cytochrome b-c1 complex subunit 7	Family
F [auth d1], P [auth d2]	IPR036544	Cytochrome b-c1 complex subunit 7 superfamily	Homologous Superfamily
A [auth a1], K [auth a3]	IPR007863	Peptidase M16, C-terminal	Domain
A [auth a1], K [auth a3]	IPR011765	Peptidase M16, N-terminal	Domain
A [auth a1], K [auth a3]	IPR011249	Metalloenzyme, LuxS/M16 peptidase-like	Homologous Superfamily
A [auth a1], K [auth a3]	IPR050361	Mitochondrial Processing Peptidase/Ubiquinol-cytochrome c Reductase Complex	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth a1], C [auth b1], F [auth d1], G [auth q1], H [auth h1] A [auth a1], C [auth b1], F [auth d1], G [auth q1], H [auth h1], K [auth a3], M [auth b2], P [auth d2], Q [auth q2], R [auth h2]	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex III (bc1 and b6f) superfamily	Cytochrome bc1 and b6f complexes

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth a1], C [auth b1], F [auth d1], G [auth q1], H [auth h1] A [auth a1], C [auth b1], F [auth d1], G [auth q1], H [auth h1], K [auth a3], M [auth b2], P [auth d2], Q [auth q2], R [auth h2]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Supercomplexes (Respirasome)	Electron Transport Chain (ETC) Super Complex I+III₂, closed class