Annotations: 1KB9

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1kb9a1	Alpha and beta proteins (a+b)	LuxS/MPP-like metallohydrolase	LuxS/MPP-like metallohydrolase	MPP-like	Cytochrome bc1 core subunit 1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
C	d1kb9c2	Membrane and cell surface proteins and peptides	Heme-binding four-helical bundle	Transmembrane di-heme cytochromes	Cytochrome b of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Mitochondrial cytochrome b subunit, N-terminal domain	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
C	d1kb9c1	Membrane and cell surface proteins and peptides	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Mitochondrial cytochrome b subunit, C-terminal domain	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
E	d1kb9e1	All beta proteins	ISP domain	ISP domain	Rieske iron-sulfur protein (ISP)	ISP subunit of the mitochondrial cytochrome bc1-complex, water-soluble domain	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
E	d1kb9e2	Membrane and cell surface proteins and peptides	Single transmembrane helix	ISP transmembrane anchor	ISP transmembrane anchor	Iron-sulfur subunit (ISP) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane region	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
F	d1kb9f_	Membrane and cell surface proteins and peptides	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
G	d1kb9g_	Membrane and cell surface proteins and peptides	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
H	d1kb9h_	Membrane and cell surface proteins and peptides	Single transmembrane helix	Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
I	d1kb9i_	Membrane and cell surface proteins and peptides	Single transmembrane helix	Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
K	d1kb9k_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin light chain kappa variable domain, VL-kappa	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
J	d1kb9j_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	Immunoglobulin heavy chain variable domain, VH	house mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B	d1kb9b1	Alpha and beta proteins (a+b)	LuxS/MPP-like metallohydrolase	LuxS/MPP-like metallohydrolase	MPP-like	Cytochrome bc1 core subunit 2	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
D	d1kb9d1	All alpha proteins	Cytochrome c	Cytochrome c	Cytochrome bc1 domain	Cytochrome bc1 domain	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
D	d1kb9d2	Membrane and cell surface proteins and peptides	Single transmembrane helix	Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor	Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor	Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	LuxS/MPP-like metallohydrolase	8040292	3001831	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	LuxS/MPP-like metallohydrolase	8040294	3001831	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8040299	3000966	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Transmembrane di-heme cytochromes	8040302	3000517	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	ISP transmembrane anchor	8040308	3000753	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	ISP domain	8040307	3000233	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8040312	3000806	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8040315	3000797	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8040318	3000770	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8040319	3000779	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	LuxS/MPP-like metallohydrolase	8040300	3001831	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	LuxS/MPP-like metallohydrolase	8040297	3001831	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) transmembrane anchor	8040305	3000762	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Cytochrome c	8040304	3000815	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	PF00675,PF05193	e1kb9A1	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: PF00675,PF05193	ECOD (1.6)
A	PF05193	e1kb9A2	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: PF05193	ECOD (1.6)
C	PF00032	e1kb9C1	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: PF00032	ECOD (1.6)
C	PF00033	e1kb9C2	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: PF00033	ECOD (1.6)
E	F_UNCLASSIFIED	e1kb9E1	A: beta sandwiches	X: ISP domain (From Topology)	H: ISP domain (From Topology)	T: ISP domain	F: F_UNCLASSIFIED	ECOD (1.6)
E	PF00355	e1kb9E3	A: few secondary structure elements	X: Trm112p-like (From Topology)	H: Trm112p-like (From Topology)	T: Trm112p-like	F: PF00355	ECOD (1.6)
E	PF02921	e1kb9E2	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: PF02921	ECOD (1.6)
F	PF02320	e1kb9F1	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: PF02320	ECOD (1.6)
G	PF02271	e1kb9G1	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: PF02271	ECOD (1.6)
H	PF02939	e1kb9H1	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: PF02939	ECOD (1.6)
I	PF05365	e1kb9I1	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: PF05365	ECOD (1.6)
K	PF07686	e1kb9K1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07686	ECOD (1.6)
J	PF07686	e1kb9J1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07686	ECOD (1.6)
B	F_UNCLASSIFIED	e1kb9B2	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: F_UNCLASSIFIED	ECOD (1.6)
B	PF00675	e1kb9B1	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: PF00675	ECOD (1.6)
D	PF02167	e1kb9D1	A: alpha arrays	X: Cytochrome c-like	H: Cytochrome c (From Topology)	T: Cytochrome c	F: PF02167	ECOD (1.6)
D	F_UNCLASSIFIED	e1kb9D2	A: extended segments	X: cytochrome c1 transmembrane anchor (From Topology)	H: cytochrome c1 transmembrane anchor (From Topology)	T: cytochrome c1 transmembrane anchor	F: F_UNCLASSIFIED	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.830.10	Alpha Beta	2-Layer Sandwich	Cytochrome Bc1 Complex	Chain A, domain 1	CATH (4.3.0)
C	1.20.810.10	Mainly Alpha	Up-down Bundle	Cytochrome Bc1 Complex	Chain C	CATH (4.3.0)
E	1.20.5.270	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Ubiquinol cytochrome reductase, transmembrane domain	CATH (4.3.0)
E	2.102.10.10	Mainly Beta	3-layer Sandwich	Rieske Iron-sulfur Protein	Rieske [2Fe-2S] iron-sulphur domain	CATH (4.3.0)
F	1.10.287.20	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Ubiquinol-cytochrome C reductase hinge domain	CATH (4.3.0)
G	1.10.1090.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain F	CATH (4.3.0)
H	1.20.5.210	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Cytochrome b-c1 complex subunit 8	CATH (4.3.0)
I	1.20.5.260	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Cytochrome b-c1 complex subunit 9	CATH (4.3.0)
K	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
J	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	3.30.830.10	Alpha Beta	2-Layer Sandwich	Cytochrome Bc1 Complex	Chain A, domain 1	CATH (4.3.0)
D	1.20.5.100	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Cytochrome c1, transmembrane anchor, C-terminal	CATH (4.3.0)
D	1.10.760.10	Mainly Alpha	Orthogonal Bundle	Cytochrome Bc1 Complex	Chain D, domain 2	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
K	Fv-1	V-KAPPA	Mus musculus (house mouse)	IGKV10-9403, IGKV10-9603, IGKV10-9404, IGKV10-9406, IGKV10-9604, IGKV10-9405, IGKV10-9408, IGKJ101	V-DOMAIN V-KAPPA	IG	FV-HEAVY_KAPPA	IMGT (202421-0)
J	Fv-1	VH	Mus musculus (house mouse)	IGHV3-602, IGHV3-601, IGHJ4*01	V-DOMAIN VH	IG	FV-HEAVY_KAPPA	IMGT (202421-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
K	Light Chain	IGKV10	Kappa	ubiquinol-cytochrome c reductase iron-sulfur subunit	SAbDab (2024-05-31)
J	Heavy Chain	IGHV3	-	ubiquinol-cytochrome c reductase iron-sulfur subunit	SAbDab (2024-05-31)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF05193	Peptidase M16 inactive domain (Peptidase_M16_C)	Peptidase M16 inactive domain	Peptidase M16 consists of two structurally related domains. One is the active peptidase, whereas the other is inactive. The two domains hold the substrate like a clamp [1].	Domain
A	PF00675	Insulinase (Peptidase family M16) (Peptidase_M16)	Insulinase (Peptidase family M16)	-	Family
C	PF00032	Cytochrome b(C-terminal)/b6/petD (Cytochrom_B_C)	Cytochrome b(C-terminal)/b6/petD	-	Domain
C	PF00033	Cytochrome b/b6/petB (Cytochrome_B)	Cytochrome b/b6/petB	-	Domain
E	PF02921	Ubiquinol cytochrome reductase transmembrane region (UCR_TM)	Ubiquinol cytochrome reductase transmembrane region	-	Family
E	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
F	PF02320	Ubiquinol-cytochrome C reductase hinge protein (UCR_hinge)	Ubiquinol-cytochrome C reductase hinge protein	-	Family
G	PF02271	Ubiquinol-cytochrome C reductase complex 14kD subunit (UCR_14kD)	Ubiquinol-cytochrome C reductase complex 14kD subunit	-	Family
H	PF02939	UcrQ family (UcrQ)	UcrQ family	-	Family
I	PF05365	Ubiquinol-cytochrome C reductase, UQCRX/QCR9 like (UCR_UQCRX_QCR9)	Ubiquinol-cytochrome C reductase, UQCRX/QCR9 like	-	Family
B	PF00675	Insulinase (Peptidase family M16) (Peptidase_M16)	Insulinase (Peptidase family M16)	-	Family
D	PF02167	Cytochrome C1 family (Cytochrom_C1)	Cytochrome C1 family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN I	peptidase activity catalytic activity, acting on a protein metalloendopeptidase activity hydrolase activity metallopeptidase activity catalytic activity endopeptidase activity cation binding ion binding 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 aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 mitochondrial ATP synthesis coupled electron transport protein localization establishment of protein localization cellular localization cellular biosynthetic process protein targeting protein processing involved in protein targeting to mitochondrion protein maturation organic substance metabolic process proteolysis cellular macromolecule localization organic substance biosynthetic process protein metabolic process organonitrogen compound metabolic process primary metabolic process gene expression macromolecule biosynthetic process establishment of protein localization to organelle mitochondrial protein processing biosynthetic process macromolecule localization protein localization to organelle protein localization to mitochondrion protein targeting to mitochondrion protein processing macromolecule metabolic process establishment of protein localization to mitochondrion	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome
C	CYTOCHROME B	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity oxidoreductase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity ubiquinol-cytochrome-c reductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity oxidoreductase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity ubiquinol-cytochrome-c reductase activity catalytic 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 cellular metabolic process 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 intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome
E	UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT	oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity oxidoreductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity ubiquinol-cytochrome-c reductase 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	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome cell periphery plasma membrane
F	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 17 KD PROTEIN	-	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 aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 mitochondrial ATP synthesis coupled electron transport	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane nucleus membrane-enclosed lumen intracellular organelle lumen organelle lumen nuclear periphery nuclear lumen respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome mitochondrial intermembrane space organelle envelope lumen
G	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 14 KD PROTEIN	-	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 aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 mitochondrial ATP synthesis coupled electron transport cytochrome complex assembly protein-containing complex organization mitochondrial respiratory chain complex III assembly cellular component organization cellular component biogenesis organelle organization cellular component assembly respiratory chain complex III assembly mitochondrial respiratory chain complex assembly protein-containing complex assembly cellular component organization or biogenesis mitochondrion organization	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome side of membrane lumenal side of membrane matrix side of mitochondrial inner membrane
H	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX UBIQUINONE-BINDING PROTEIN QP-C	-	aerobic respiration cellular respiration aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome
I	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX 7.3 KD PROTEIN	-	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 aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 mitochondrial ATP synthesis coupled electron transport cytochrome complex assembly protein-containing complex organization mitochondrial respiratory chain complex III assembly cellular component organization cellular component biogenesis organelle organization cellular component assembly respiratory chain complex III assembly mitochondrial respiratory chain complex assembly protein-containing complex assembly cellular component organization or biogenesis mitochondrion organization	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome
K	LIGHT CHAIN (VL) OF FV-FRAGMENT	-	-	-
J	HEAVY CHAIN (VH) OF FV-FRAGMENT	-	-	-
B	UBIQUINOL-CYTOCHROME C REDUCTASE COMPLEX CORE PROTEIN 2	peptidase activity catalytic activity, acting on a protein metalloendopeptidase activity hydrolase activity metallopeptidase activity catalytic activity endopeptidase activity cation binding ion binding 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 aerobic electron transport chain oxidative phosphorylation energy derivation by oxidation of organic compounds cellular metabolic process 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 mitochondrial ATP synthesis coupled electron transport organic substance metabolic process organonitrogen compound metabolic process proteolysis primary metabolic process protein metabolic process macromolecule metabolic process	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome mitochondrial crista
D	CYTOCHROME C1, HEME PROTEIN	monoatomic cation transmembrane transporter activity proton transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity oxidoreductase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity ubiquinol-cytochrome-c reductase activity catalytic activity monoatomic cation transmembrane transporter activity proton transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity oxidoreductase activity electron transfer activity active monoatomic ion transmembrane transporter activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity inorganic cation transmembrane transporter activity monoatomic ion transmembrane transporter activity transporter activity ubiquinol-cytochrome-c reductase activity catalytic activity transmembrane transporter activity binding organic cyclic compound binding tetrapyrrole binding heme 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 cellular metabolic process 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 intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle mitochondrial membrane organelle inner membrane membrane mitochondrial inner membrane organelle envelope mitochondrial envelope organelle membrane respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III oxidoreductase complex mitochondrial protein-containing complex catalytic complex inner mitochondrial membrane protein complex transmembrane transporter complex respirasome cytosol mitochondrial intermembrane space membrane-enclosed lumen intracellular organelle lumen organelle envelope lumen organelle lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR007863	Peptidase M16, C-terminal	Domain
A	IPR011249	Metalloenzyme, LuxS/M16 peptidase-like	Homologous Superfamily
A	IPR011765	Peptidase M16, N-terminal	Domain
C	IPR036150	Cytochrome b/b6, C-terminal domain superfamily	Homologous Superfamily
C	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
C	IPR048260	Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial	Domain
C	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
C	IPR005798	Cytochrome b/b6, C-terminal	Domain
C	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
C	IPR030689	Cytochrome b	Family
C	IPR005797	Cytochrome b/b6, N-terminal domain	Domain
E	IPR036922	Rieske [2Fe-2S] iron-sulphur domain superfamily	Homologous Superfamily
E	IPR014349	Rieske iron-sulphur protein	Family
E	IPR004192	Cytochrome b-c1 complex subunit Rieske, transmembrane domain	Domain
E	IPR017941	Rieske [2Fe-2S] iron-sulphur domain	Domain
E	IPR005805	Rieske iron-sulphur protein, C-terminal	Domain
E	IPR037008	Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily	Homologous Superfamily
E	IPR006317	Ubiquinol-cytochrome c reductase, iron-sulphur subunit	Domain
F	IPR023184	Ubiquinol-cytochrome C reductase hinge domain	Domain
F	IPR036811	Ubiquinol-cytochrome C reductase hinge domain superfamily	Homologous Superfamily
G	IPR003197	Cytochrome b-c1 complex subunit 7	Family
G	IPR036544	Cytochrome b-c1 complex subunit 7 superfamily	Homologous Superfamily
H	IPR004205	Cytochrome b-c1 complex subunit 8	Family
H	IPR036642	Cytochrome b-c1 complex subunit 8 superfamily	Homologous Superfamily
I	IPR008027	Cytochrome b-c1 complex subunit 9	Family
I	IPR036656	Cytochrome b-c1 complex subunit 9 superfamily	Homologous Superfamily
B	IPR011249	Metalloenzyme, LuxS/M16 peptidase-like	Homologous Superfamily
B	IPR011765	Peptidase M16, N-terminal	Domain
B	IPR001431	Peptidase M16, zinc-binding site	Binding Site
D	IPR036909	Cytochrome c-like domain superfamily	Homologous Superfamily
D	IPR002326	Cytochrome c1	Family
D	IPR009056	Cytochrome c-like domain	Domain
D	IPR021157	Cytochrome c1, transmembrane anchor, C-terminal	Homologous Superfamily

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	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	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	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Complexes: Complex III (Cytochrome bc₁)	Cytochrome bc₁