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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative

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Evolutionary classification of protein domain structures

alpha arraysalpha-helix arrays with mainly perpendicular helices

alpha bundlesalpha-helix bundles with mainly parallel helices

alpha superhelicesrepeating alpha-helix hairpins form a superhelix

alpha duplicates or obligate multimersalpha duplicates or monomers associate together to form a compact domain

alpha complex topologyalpha domain with complex and unique topology that cannot be described as array or bundle or superhelix

beta barrelssingle beta-sheet folded upon itself to form a barrel

beta meanderssingle beta-sheet with mainly meander topology

beta sandwichestwo beta-sheets stacked together to form a sandwich

beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain

beta complex topologybeta domains with complex and unique topology that cannot be described as barrel or sandwich or meander

a+b two layersone alpha-helix layer and one beta-sheet layer

a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers

a+b four layerstwo beta-sheet layers sandwiched between two alpha-helix layers

a+b complex topologyalpha and beta domain with complex and unique topology that cannot be described in layers

a+b duplicates or obligate multimersalpha and beta duplicates or monomers associated together to form a compact domain

a/b barrelsrepeating beta-alpha units form a barrel

a/b three-layered sandwichesrepeating beta-alpha units form a sandwich with a mainly parallel beta-sheet layer stacked between two alpha-helix layers

mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions

few secondary structure elementsstabilized by cofactors or disulfides

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes

X: Ubiquinol-cytochrome c reductase 8 kDa protein
H: Ubiquinol-cytochrome c reductase 8 kDa protein
T: Ubiquinol-cytochrome c reductase 8 kDa protein
F: Ubiq-Cytc-red_N

PF09165

Representatives:

e1ppjI1[I:32-78] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase iron-sulfur subunit, mitochondrial ; ligands: GOL ; X-RAY DIFFRACTION 2.100Å

e7dgqB51[B5:57-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e7dgrB11[B1:57-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e7dgsB31[B3:57-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e1pp9I1[I:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase iron-sulfur subunit, mitochondrial ; ligands: GOL ; X-RAY DIFFRACTION 2.100Å

e1ppjV1[V:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase iron-sulfur subunit, mitochondrial ; ligands: AZI,GOL ; X-RAY DIFFRACTION 2.100Å

e1pp9V1[V:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase iron-sulfur subunit, mitochondrial ; ligands: GOL ; X-RAY DIFFRACTION 2.100Å

e1ntmI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE 8 KDA PROTEIN ; X-RAY DIFFRACTION 2.4Å

e1sqxI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase complex ubiquinone-binding protein QP-C ; X-RAY DIFFRACTION 2.5Å

e1sqvI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase complex 8 kDa protein ; X-RAY DIFFRACTION 2.85Å

e1sqbI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE 8 KDA PROTEIN ; X-RAY DIFFRACTION 2.69Å

e1ntzI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE 8 KDA PROTEIN ; X-RAY DIFFRACTION 2.6Å

e1l0nI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE 8 KDA PROTEIN ; X-RAY DIFFRACTION 2.6Å

e1l0lI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE 8 KDA PROTEIN ; X-RAY DIFFRACTION 2.35Å

e1ntkI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome C reductase 8 kDa protein ; X-RAY DIFFRACTION 2.6Å

e1sqqI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome c reductase iron-sulfur subunit, mitochondrial precursor (EC 1.10.2.2) (Rieske iron-sulfur protein) (RISP) [Contains: Ubiquinol-cytochrome c reductase 8 kDa protein (Complex III subunit IX)] ; X-RAY DIFFRACTION 3.0Å

e1sqpI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome c reductase iron-sulfur subunit, mitochondrial precursor (EC 1.10.2.2) (Rieske iron-sulfur protein) (RISP) [Contains: Ubiquinol-cytochrome c reductase 8 kDa protein (Complex III subunit IX)] ; X-RAY DIFFRACTION 2.7Å

e2fyuI1[I:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT, MITOCHONDRIAL ; X-RAY DIFFRACTION 2.26Å

e2ybbI1[I:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; ELECTRON MICROSCOPY

e2a06I1[I:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome c reductase iron-sulfur subunit, mitochondrial ; ligands: PEE,PO4,UNL ; X-RAY DIFFRACTION 1.990Å

e2a06V1[V:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Ubiquinol-cytochrome c reductase iron-sulfur subunit, mitochondrial ; ligands: GOL ; X-RAY DIFFRACTION 1.990Å

e2ybbi1[i:32-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; ELECTRON MICROSCOPY

e3cwbI1[I:20-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MITOCHONDRIAL UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT, leader sequence ; X-RAY DIFFRACTION 3.5Å

e3h1hI1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.16Å

e3h1iI1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 3.53Å

e3h1jI1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.000Å

e3h1kI1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 3.48Å

e3h1lI1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.200Å

e3l70I1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.690Å

e3l71I1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.790Å

e3l72I1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 3.000Å

e3l73I1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 2.90Å

e3l74I1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 2.700Å

e3l75I1[I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 2.700Å

e3h1kV1[V:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 3.48Å

e3tguI1[I:1-8,I:28-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.700Å

e1bgyI2[I:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME BC1 COMPLEX ; X-RAY DIFFRACTION 3.0Å

e3cwbV2[V:20-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MITOCHONDRIAL UBIQUINOL-CYTOCHROME C REDUCTASE IRON-SULFUR SUBUNIT, leader sequence ; X-RAY DIFFRACTION 3.5Å

e1be3I1[I:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME BC1 COMPLEX ; X-RAY DIFFRACTION 3.0Å

e4d6uI1[I:50-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 4.09Å

e3tguV1[V:1-8,V:30-75] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.700Å

e4u3fI1[I:29-77] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.230Å

e4u3fV1[V:29-77] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.230Å

e1bgyU1[U:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME BC1 COMPLEX ; X-RAY DIFFRACTION 3.0Å

e4d6tI1[I:50-77] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME B-C1 COMPLEX SUBUNIT RIESKE, MITOCHONDRIAL ; X-RAY DIFFRACTION 3.56Å

e5j4zAI1[AI:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5j4zAT1[AT:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5j7yAI1[AI:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5j7yAT1[AT:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5j8kAI1[AI:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5j8kAT1[AT:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5klvI1[I:20-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.650Å

e5lufi1[i:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5lufu1[u:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5gupAe1[Ae:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske transit peptide, mitochondrial ; ELECTRON MICROSCOPY

e5gupAf1[Af:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske transit peptide, mitochondrial ; ELECTRON MICROSCOPY

e5gpnI1[I:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5gpnU1[U:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5nmiI1[I:49-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.50Å

e5nmiV1[V:49-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.50Å

e5xteB1[B:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5xteO1[O:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5xthAB1[AB:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5xthAO1[AO:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5xtiAB1[AB:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5xtiAO1[AO:1-57] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ELECTRON MICROSCOPY

e5okdI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.1Å

e6hawI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; ligands: PG4 ; X-RAY DIFFRACTION 3.45Å

e6nhgI1[I:20-70] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.800Å

e6xvfI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.450Å

e6zfsI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.500Å

e6zftI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.300Å

e6zfuI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.500Å

e7dkfI11[I1:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit 9 ; ELECTRON MICROSCOPY

e7dkfU11[U1:46-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit 9 ; ELECTRON MICROSCOPY

e7r3vI1[I:33-78] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 3.20Å

e7tayI1[I:20-70] Image Pymol Jmol Links: PDB, SCOP, CATH

Cytochrome b-c1 complex subunit Rieske, mitochondrial ; X-RAY DIFFRACTION 2.950Å

e1bgyI1[I:1-33] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CYTOCHROME BC1 COMPLEX ; X-RAY DIFFRACTION 3.0Å

e1nu1I1[I:1-57] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UBIQUINOL-CYTOCHROME C REDUCTASE 8 KDA PROTEIN ; X-RAY DIFFRACTION 3.2Å

F: Unmapped domains

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.