7ZYV

Cryo-EM structure of catalytically active Spinacia oleracea cytochrome b6f in complex with endogenous plastoquinones at 2.13 A resolution

External Resource: Annotation

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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Transmembrane di-heme cytochromes	8094397	3000517	SCOP2B (2021-05-27)
I	SCOP2B Superfamily	Transmembrane di-heme cytochromes	8094397	3000517	SCOP2B (2021-05-27)
B	SCOP2B Superfamily	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8093928	3000966	SCOP2B (2021-05-27)
J	SCOP2B Superfamily	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8093928	3000966	SCOP2B (2021-05-27)
D	SCOP2B Superfamily	ISP domain	8041548	3000233	SCOP2B (2021-05-27)
L	SCOP2B Superfamily	ISP domain	8041548	3000233	SCOP2B (2021-05-27)
H	SCOP2B Superfamily	PetN subunit of the cytochrome b6f complex	8094653	3000279	SCOP2B (2021-05-27)
P	SCOP2B Superfamily	PetN subunit of the cytochrome b6f complex	8094653	3000279	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00033	e7zyvA1	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)
I	PF00033	e7zyvI1	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)
B	PF00032	e7zyvB1	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)
J	PF00032	e7zyvJ1	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)
D	F_UNCLASSIFIED	e7zyvD2	A: beta sandwiches	X: ISP domain (From Topology)	H: ISP domain (From Topology)	T: ISP domain	F: F_UNCLASSIFIED	ECOD (1.6)
D	PF00355	e7zyvD1	A: few secondary structure elements	X: Trm112p-like (From Topology)	H: Trm112p-like (From Topology)	T: Trm112p-like	F: PF00355	ECOD (1.6)
D	F_UNCLASSIFIED	e7zyvD3	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: F_UNCLASSIFIED	ECOD (1.6)
L	F_UNCLASSIFIED	e7zyvL1	A: beta sandwiches	X: ISP domain (From Topology)	H: ISP domain (From Topology)	T: ISP domain	F: F_UNCLASSIFIED	ECOD (1.6)
L	PF00355	e7zyvL2	A: few secondary structure elements	X: Trm112p-like (From Topology)	H: Trm112p-like (From Topology)	T: Trm112p-like	F: PF00355	ECOD (1.6)
L	F_UNCLASSIFIED	e7zyvL3	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: F_UNCLASSIFIED	ECOD (1.6)
E	PF05115	e7zyvE1	A: extended segments	X: PetL subunit of the cytochrome b6f complex (From Topology)	H: PetL subunit of the cytochrome b6f complex (From Topology)	T: PetL subunit of the cytochrome b6f complex	F: PF05115	ECOD (1.6)
M	PF05115	e7zyvM1	A: extended segments	X: PetL subunit of the cytochrome b6f complex (From Topology)	H: PetL subunit of the cytochrome b6f complex (From Topology)	T: PetL subunit of the cytochrome b6f complex	F: PF05115	ECOD (1.6)
F	PF08041	e7zyvF1	A: extended segments	X: PetM subunit of the cytochrome b6f complex (From Topology)	H: PetM subunit of the cytochrome b6f complex (From Topology)	T: PetM subunit of the cytochrome b6f complex	F: PF08041	ECOD (1.6)
N	PF08041	e7zyvN1	A: extended segments	X: PetM subunit of the cytochrome b6f complex (From Topology)	H: PetM subunit of the cytochrome b6f complex (From Topology)	T: PetM subunit of the cytochrome b6f complex	F: PF08041	ECOD (1.6)
G	PF02529	e7zyvG1	A: extended segments	X: PetG subunit of the cytochrome b6f complex (From Topology)	H: PetG subunit of the cytochrome b6f complex (From Topology)	T: PetG subunit of the cytochrome b6f complex	F: PF02529	ECOD (1.6)
O	PF02529	e7zyvO1	A: extended segments	X: PetG subunit of the cytochrome b6f complex (From Topology)	H: PetG subunit of the cytochrome b6f complex (From Topology)	T: PetG subunit of the cytochrome b6f complex	F: PF02529	ECOD (1.6)
H	PF03742	e7zyvH1	A: extended segments	X: PetN subunit of the cytochrome b6f complex (From Topology)	H: PetN subunit of the cytochrome b6f complex (From Topology)	T: PetN subunit of the cytochrome b6f complex	F: PF03742	ECOD (1.6)
P	PF03742	e7zyvP1	A: extended segments	X: PetN subunit of the cytochrome b6f complex (From Topology)	H: PetN subunit of the cytochrome b6f complex (From Topology)	T: PetN subunit of the cytochrome b6f complex	F: PF03742	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, I	PF00033	Cytochrome b/b6/petB (Cytochrome_B)	Cytochrome b/b6/petB	-	Domain
B, J	PF00032	Cytochrome b(C-terminal)/b6/petD (Cytochrom_B_C)	Cytochrome b(C-terminal)/b6/petD	-	Domain
C, K	PF16639	Apocytochrome F, N-terminal (Apocytochr_F_N)	Apocytochrome F, N-terminal	This is the N-terminal domain of cytochrome f. It is a soluble lumen-side domain [1].	Domain
C, K	PF01333	Apocytochrome F, C-terminal (Apocytochr_F_C)	Apocytochrome F, C-terminal	This is a sub-family of cytochrome C. See Pfam:PF00034.	Domain
D, L	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
E, M	PF05115	Cytochrome B6-F complex subunit VI (PetL) (PetL)	Cytochrome B6-F complex subunit VI (PetL)	-	Family
G, O	PF02529	Cytochrome B6-F complex subunit 5 (PetG)	Cytochrome B6-F complex subunit 5	-	Family
H, P	PF03742	PetN (PetN)	PetN	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, I	Cytochrome b6	electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II 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 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 electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II 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 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 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 photosynthesis	membrane-bounded organelle respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III intracellular organelle membrane-bounded organelle respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III intracellular organelle organelle envelope oxidoreductase complex mitochondrial protein-containing complex catalytic complex membrane cellular anatomical entity intracellular membrane-bounded organelle mitochondrial inner membrane inner mitochondrial membrane protein complex transmembrane transporter complex organelle mitochondrial envelope respirasome cytoplasm organelle membrane chloroplast thylakoid membrane plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid bounding membrane of organelle thylakoid plastid envelope chloroplast non-membrane-bounded organelle thylakoid membrane chloroplast thylakoid intracellular non-membrane-bounded organelle outer membrane photosynthetic membrane
B, J	Cytochrome b6-f complex subunit 4	electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis 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 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 electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis 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 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	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 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 photosynthesis photosynthesis, light reaction photosynthetic electron transport chain	membrane-bounded organelle respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III intracellular organelle membrane-bounded organelle respiratory chain complex protein-containing complex mitochondrial respiratory chain complex III intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion cytochrome complex mitochondrial respirasome membrane protein complex transporter complex respiratory chain complex III intracellular organelle organelle envelope oxidoreductase complex mitochondrial protein-containing complex catalytic complex membrane cellular anatomical entity intracellular membrane-bounded organelle mitochondrial inner membrane inner mitochondrial membrane protein complex transmembrane transporter complex organelle mitochondrial envelope respirasome cytoplasm organelle membrane chloroplast thylakoid membrane plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid bounding membrane of organelle thylakoid plastid envelope chloroplast non-membrane-bounded organelle thylakoid membrane chloroplast thylakoid intracellular non-membrane-bounded organelle outer membrane photosynthetic membrane
C, K	Cytochrome f	binding organic cyclic compound binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding	photosynthesis cellular metabolic process metabolic process cellular process	chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope bounding membrane of organelle thylakoid plastid envelope chloroplast chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope bounding membrane of organelle thylakoid plastid envelope chloroplast non-membrane-bounded organelle membrane cellular anatomical entity intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid intracellular non-membrane-bounded organelle outer membrane cytoplasm photosynthetic membrane organelle membrane
D, L	Cytochrome b6-f complex iron-sulfur subunit, chloroplastic	electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity oxidoreductase activity plastoquinol--plastocyanin reductase activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors, with copper protein as acceptor transporter activity transmembrane transporter activity catalytic activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity oxidoreductase activity plastoquinol--plastocyanin reductase activity oxidoreduction-driven active transmembrane transporter activity active transmembrane transporter activity oxidoreductase activity, acting on diphenols and related substances as donors, with copper protein as acceptor transporter activity transmembrane transporter activity catalytic 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 plasma membrane membrane cellular anatomical entity chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope cell periphery plasma membrane membrane cellular anatomical entity chloroplast thylakoid membrane membrane-bounded organelle plastid membrane intracellular anatomical structure plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid intracellular organelle organelle envelope bounding membrane of organelle thylakoid plastid envelope chloroplast non-membrane-bounded organelle intracellular membrane-bounded organelle thylakoid membrane organelle chloroplast thylakoid intracellular non-membrane-bounded organelle outer membrane cytoplasm photosynthetic membrane organelle membrane
E, M	Cytochrome b6-f complex subunit 6	electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	photosynthesis cellular metabolic process metabolic process cellular process	protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex cellular anatomical entity intracellular organelle cytochrome b6f complex organelle intracellular non-membrane-bounded organelle thylakoid non-membrane-bounded organelle chloroplast thylakoid membrane membrane-bounded organelle plastid membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex cellular anatomical entity intracellular organelle cytochrome b6f complex organelle intracellular non-membrane-bounded organelle thylakoid non-membrane-bounded organelle chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast membrane intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane
F, N	Cytochrome b6-f complex subunit 7	-	-	-
G, O	Cytochrome b6-f complex subunit 5	electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	photosynthesis cellular metabolic process metabolic process cellular process cytochrome complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular component organization or biogenesis	protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex cellular anatomical entity intracellular organelle cytochrome b6f complex organelle intracellular non-membrane-bounded organelle thylakoid non-membrane-bounded organelle chloroplast thylakoid membrane membrane-bounded organelle plastid membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex cellular anatomical entity intracellular organelle cytochrome b6f complex organelle intracellular non-membrane-bounded organelle thylakoid non-membrane-bounded organelle chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast membrane intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane
H, P	Cytochrome b6-f complex subunit 8	electron transfer activity electron transporter, transferring electrons within cytochrome b6/f complex of photosystem II activity	photosynthesis cellular metabolic process metabolic process cellular process cytochrome complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular component organization or biogenesis	protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex cellular anatomical entity intracellular organelle cytochrome b6f complex organelle intracellular non-membrane-bounded organelle thylakoid non-membrane-bounded organelle chloroplast thylakoid membrane membrane-bounded organelle plastid membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex cellular anatomical entity intracellular organelle cytochrome b6f complex organelle intracellular non-membrane-bounded organelle thylakoid non-membrane-bounded organelle chloroplast thylakoid membrane membrane-bounded organelle plastid membrane plastid organelle outer membrane plastid thylakoid membrane plastid thylakoid organelle envelope bounding membrane of organelle plastid envelope chloroplast membrane intracellular membrane-bounded organelle thylakoid membrane chloroplast thylakoid outer membrane cytoplasm photosynthetic membrane organelle membrane
Q [auth R], R [auth Q]	Thylakoid soluble phosphoprotein	protein-containing complex binding binding chloroplast photosystem I binding lipid binding chloroplast photosystem II binding PSII associated light-harvesting complex II binding	response to light stimulus response to stimulus response to radiation response to abiotic stimulus localization	intracellular organelle intracellular anatomical structure organelle membrane intracellular non-membrane-bounded organelle photosynthetic membrane cellular anatomical entity thylakoid membrane thylakoid non-membrane-bounded organelle membrane-bounded organelle plastid cytoplasm intracellular membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle membrane intracellular non-membrane-bounded organelle photosynthetic membrane cellular anatomical entity thylakoid membrane thylakoid non-membrane-bounded organelle membrane-bounded organelle plastid cytoplasm intracellular membrane-bounded organelle chloroplast

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, I	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
A, I	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
A, I	IPR023530	Cytochrome b6, PetB	Family
A, I	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
A, I	IPR005797	Cytochrome b/b6, N-terminal domain	Domain
B, J	IPR036150	Cytochrome b/b6, C-terminal domain superfamily	Homologous Superfamily
B, J	IPR005798	Cytochrome b/b6, C-terminal	Domain
B, J	IPR005870	Cytochrome b6/f complex, subunit IV	Family
B, J	IPR048260	Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial	Domain
C, K	IPR002325	Cytochrome f	Family
C, K	IPR011054	Rudiment single hybrid motif	Homologous Superfamily
C, K	IPR036826	Cytochrome f large domain superfamily	Homologous Superfamily
C, K	IPR024058	Cytochrome f transmembrane anchor	Homologous Superfamily
C, K	IPR024094	Cytochrome f large domain	Domain
D, L	IPR017941	Rieske [2Fe-2S] iron-sulphur domain	Domain
D, L	IPR005805	Rieske iron-sulphur protein, C-terminal	Domain
D, L	IPR036922	Rieske [2Fe-2S] iron-sulphur domain superfamily	Homologous Superfamily
D, L	IPR023960	Cytochrome b6-f complex iron-sulfur subunit	Family
D, L	IPR014349	Rieske iron-sulphur protein	Family
E, M	IPR007802	Cytochrome b6-f complex subunit 6	Family
G, O	IPR003683	Cytochrome b6/f complex, subunit 5	Family
G, O	IPR036099	Cytochrome b6/f complex, subunit 5 superfamily	Homologous Superfamily
H, P	IPR036143	Cytochrome b6-f complex, subunit 8 superfamily	Homologous Superfamily
H, P	IPR005497	Cytochrome b6-f complex, subunit 8	Family
Q [auth R], R [auth Q]	IPR037244	Thylakoid soluble phosphoprotein TSP9 superfamily	Homologous Superfamily
Q [auth R], R [auth Q]	IPR021584	Thylakoid soluble phosphoprotein TSP9	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B, C, D, E A, B, C, D, E, G, H, I, J, K, L, M, O, P	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex III (bc1 and b6f) superfamily	Cytochrome bc1 and b6f complexes

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, G, H, I, J, K, L, M, O, P	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D, E A, B, C, D, E, G, H, I, J, K, L, M, O, P	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Complexes: Cytochrome b₆f of Oxygenic Photosynthesis	dimeric cytochrome b₆f complex with bound plastoquinones