4H44 | pdb_00004h44

2.70 A Cytochrome b6f Complex Structure From Nostoc PCC 7120

External Resource: Annotation

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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
H	SCOP2B Superfamily	PetN subunit of the cytochrome b6f complex	8076381	3000279	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	PetM subunit of the cytochrome b6f complex	8083554	3000262	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Rudiment single hybrid motif	8032341	3001910	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	cytochrome f, large domain	8032340	3000800	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	cytochrome f, large domain	8032340	3000800	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)	8078665	3000966	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Transmembrane di-heme cytochromes	8083550	3000517	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)
H	Oxidored_q6	e4h44H1	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)
G	Rrf2	e4h44G1	A: alpha bundles	X: beta-Grasp	H: HTH	T: winged helix domain	F: Rrf2	ECOD (develop294)
F	Oxidored_q6	e4h44F1	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)
E	Oxidored_q6	e4h44E1	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)
D	Oxidored_q6	e4h44D2	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)
D	Vinculin	e4h44D4	A: alpha bundles	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F: Vinculin	ECOD (develop294)
C	Oxidored_q6	e4h44C2	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)
C	Ribosomal_L24e	e4h44C4	A: alpha bundles	X: ssDNA-binding transcriptional regulator domain-like	H: ssDNA-binding transcriptional regulator domain	T: ssDNA-binding transcriptional regulator domain	F: Ribosomal_L24e	ECOD (develop294)
B	Oxidored_q6	e4h44B1	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)
A	Oxidored_q6	e4h44A1	A: alpha bundles	X: Ribonuclease H-like	H: Ribonuclease H-like	T: Ribonuclease H-like	F: Oxidored_q6	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	1.20.5.700	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Single helix bin	CATH (4.3.0)
D	2.102.10.10	Mainly Beta	3-layer Sandwich	Rieske Iron-sulfur Protein	Rieske [2Fe-2S] iron-sulphur domain	CATH (4.3.0)
C	2.60.40.830	Mainly Beta	Sandwich	Immunoglobulin-like	Cytochrome f large domain	CATH (4.3.0)
C	2.40.50.100	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain	CATH (4.3.0)
C	1.20.5.700	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Single helix bin	CATH (4.3.0)
B	1.20.5.510	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Single helix bin	CATH (4.3.0)
B	1.10.287.980	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	plastocyanin oxidoreductase	CATH (4.3.0)
A	1.20.810.10	Mainly Alpha	Up-down Bundle	Cytochrome Bc1 Complex	Chain C	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
H	PF03742	PetN (PetN)	PetN	-	Family
G	PF02529	Cytochrome B6-F complex subunit 5 (PetG)	Cytochrome B6-F complex subunit 5	-	Family
F	PF08041	PetM family of cytochrome b6f complex subunit 7 (PetM)	PetM family of cytochrome b6f complex subunit 7	-	Family
E	PF05115	Cytochrome B6-F complex subunit VI (PetL) (PetL)	Cytochrome B6-F complex subunit VI (PetL)	-	Family
D	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
C	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	PF01333	Apocytochrome F, C-terminal (Apocytochr_F_C)	Apocytochrome F, C-terminal	This is a sub-family of cytochrome C. See Pfam:PF00034.	Domain
B	PF00032	Cytochrome b(C-terminal)/b6/petD (Cytochrom_B_C)	Cytochrome b(C-terminal)/b6/petD		Domain
A	PF00033	Cytochrome b/b6/petB (Cytochrome_B)	Cytochrome b/b6/petB		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
H	Cytochrome b6-f complex subunit 8	electron transfer activity	photosynthesis 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 intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane
G	Cytochrome b6-f complex subunit 5	-	photosynthesis 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 intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane
F	Cytochrome b6-f complex subunit 7	electron transfer activity	photosynthesis metabolic process cellular process	protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane
E	Cytochrome b6-f complex subunit 6	electron transfer activity	photosynthesis metabolic process cellular process	protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane protein-containing complex intracellular anatomical structure cytochrome complex catalytic complex intracellular membraneless organelle intracellular organelle cellular anatomical structure cytochrome b6f complex organelle membraneless organelle thylakoid plasma membrane-derived chromatophore membrane membrane plasma membrane plasma membrane-derived chromatophore thylakoid membrane cell periphery plasma membrane-derived thylakoid membrane plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane
D	Cytochrome b6-f complex iron-sulfur subunit 1	iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding monooxygenase activity oxidoreductase activity catalytic activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity electron transfer activity plastoquinol--plastocyanin reductase activity oxidoreduction-driven active transmembrane transporter activity iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding monooxygenase activity oxidoreductase activity catalytic activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen oxidoreductase activity, acting on diphenols and related substances as donors primary active transmembrane transporter activity electron transfer 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 cation binding ion binding metal ion binding	photosynthesis metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid
C	Apocytochrome f	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 metabolic process cellular process	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid
B	Cytochrome b6-f complex subunit 4	oxidoreductase activity catalytic activity electron transfer activity	photosynthesis photosynthesis, light reaction photosynthetic electron transport chain electron transport chain metabolic process cellular process generation of precursor metabolites and energy	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid
A	Cytochrome b6	oxidoreductase activity catalytic activity electron transfer 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 photosynthesis	intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region intracellular anatomical structure plasma membrane-derived chromatophore membrane membrane plasma membrane intracellular membraneless organelle plasma membrane-derived chromatophore thylakoid membrane intracellular organelle cell periphery cellular anatomical structure plasma membrane-derived thylakoid membrane organelle membraneless organelle plasma membrane region bacterial thylakoid cytoplasm photosynthetic membrane thylakoid

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
H	IPR036143	Cytochrome b6-f complex, subunit 8 superfamily	Homologous Superfamily
H	IPR005497	Cytochrome b6-f complex, subunit 8	Family
G	IPR003683	Cytochrome b6/f complex, subunit 5	Family
G	IPR036099	Cytochrome b6/f complex, subunit 5 superfamily	Homologous Superfamily
F	IPR012595	PetM of cytochrome b6/f complex subunit 7	Family
E	IPR007802	Cytochrome b6-f complex subunit 6	Family
D	IPR036922	Rieske [2Fe-2S] iron-sulphur domain superfamily	Homologous Superfamily
D	IPR014349	Rieske iron-sulphur protein	Family
D	IPR017941	Rieske [2Fe-2S] iron-sulphur domain	Domain
D	IPR005805	Rieske iron-sulphur protein, C-terminal	Domain
D	IPR023960	Cytochrome b6-f complex iron-sulfur subunit	Family
D	IPR057415	Cytochrome b6-f complex iron-sulfur subunit-like, transmembrane anchor	Domain
C	IPR002325	Cytochrome f	Family
C	IPR011054	Rudiment single hybrid motif	Homologous Superfamily
C	IPR036826	Cytochrome f large domain superfamily	Homologous Superfamily
C	IPR024058	Cytochrome f transmembrane anchor	Homologous Superfamily
C	IPR024094	Cytochrome f large domain	Domain
B	IPR036150	Cytochrome b/b6, C-terminal domain superfamily	Homologous Superfamily
B	IPR005798	Cytochrome b/b6, C-terminal	Domain
B	IPR005870	Cytochrome b6/f complex, subunit IV	Family
B	IPR048260	Cytochrome b/b6, C-terminal domain, eukaryotic/bacterial	Domain
A	IPR027387	Cytochrome b/b6-like domain superfamily	Homologous Superfamily
A	IPR016174	Di-haem cytochrome, transmembrane	Homologous Superfamily
A	IPR023530	Cytochrome b6, PetB	Family
A	IPR048259	Cytochrome b/b6, N-terminal domain, eukaryotic/bacterial	Domain
A	IPR005797	Cytochrome b/b6, N-terminal domain	Domain

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D, E A, B, C, D, E, F, G, H	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	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	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Complexes: Cytochrome b₆f of Oxygenic Photosynthesis	Cytochrome b₆f complex