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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

X: Thioredoxin-like
H: Thioredoxin-like
T: Thioredoxin-like
F: SCO1-SenC

PF02630 CL0172

Representatives:

e1xzoA1[A:3-174] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ypmQ ; ligands: CA,CD ; X-RAY DIFFRACTION 1.7Å

e1on4A1[A:3-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sco1 ; SOLUTION NMR

e1xzoB1[B:3-174] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Hypothetical protein ypmQ ; ligands: CA,CD ; X-RAY DIFFRACTION 1.7Å

e2ggtA1[A:138-297] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN HOMOLOG, MITOCHONDRIAL ; ligands: CL,NI ; X-RAY DIFFRACTION 2.4Å

e1wp0C1[C:138-297] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN HOMOLOG ; X-RAY DIFFRACTION 2.8Å

e2ggtB1[B:138-297] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN HOMOLOG, MITOCHONDRIAL ; ligands: CL,NI ; X-RAY DIFFRACTION 2.4Å

e1wp0B1[B:138-297] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN HOMOLOG ; X-RAY DIFFRACTION 2.8Å

e2b7kD1[D:113-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; ligands: PT ; X-RAY DIFFRACTION 1.8Å

e2b7kC1[C:111-279] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; X-RAY DIFFRACTION 1.8Å

e2b7jD1[D:113-279] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; X-RAY DIFFRACTION 2.3Å

e2b7jB1[B:113-279] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; X-RAY DIFFRACTION 2.3Å

e2b7jA1[A:111-279] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; ligands: CU ; X-RAY DIFFRACTION 2.3Å

e2b7kB1[B:113-276] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; ligands: PT ; X-RAY DIFFRACTION 1.8Å

e2b7jC1[C:111-279] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; ligands: CU ; X-RAY DIFFRACTION 2.3Å

e3me7A1[A:2-170] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; ligands: SO4 ; X-RAY DIFFRACTION 1.500Å

e4hdeA1[A:28-195] Image Pymol Jmol Links: PDB, SCOP, CATH

SCO1/SENC FAMILY LIPOPROTEIN ; X-RAY DIFFRACTION 1.32Å

e2k6vA1[A:1-172] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative cytochrome c oxidase assembly protein ; SOLUTION NMR

e2gqkA1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; ligands: NI ; SOLUTION NMR

e2rliA1[A:97-266] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO2 protein homolog, mitochondrial ; ligands: CU1 ; SOLUTION NMR

e2gqlA1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; ligands: NI ; SOLUTION NMR

e2gqmA1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; ligands: CU1 ; SOLUTION NMR

e2gt5A1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; SOLUTION NMR

e2gt6A1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; ligands: CU1 ; SOLUTION NMR

e2gvpA1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; SOLUTION NMR

e2hrfA1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; ligands: CU1 ; SOLUTION NMR

e2hrnA1[A:129-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 protein homolog, mitochondrial ; ligands: CU1 ; SOLUTION NMR

e3me7B1[B:2-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; ligands: SO4 ; X-RAY DIFFRACTION 1.500Å

e3me8A1[A:2-170] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 1.500Å

e3me8B1[B:2-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Putative uncharacterized protein ; X-RAY DIFFRACTION 1.500Å

e4bpyA1[A:42-216] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO PROTEIN ; X-RAY DIFFRACTION 1.4Å

e4txoD1[D:38-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blr1131 protein ; ligands: SCN ; X-RAY DIFFRACTION 2.200Å

e4txoB1[B:39-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blr1131 protein ; ligands: NA ; X-RAY DIFFRACTION 2.200Å

e4txoF1[F:39-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blr1131 protein ; X-RAY DIFFRACTION 2.200Å

e4txoH1[H:40-196] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Blr1131 protein ; X-RAY DIFFRACTION 2.200Å

e4wbjB1[B:39-196] Image Pymol Jmol Links: PDB, SCOP, CATH

Blr1131 protein ; ligands: SIN ; X-RAY DIFFRACTION 1.300Å

e4wbjA1[A:40-196] Image Pymol Jmol Links: PDB, SCOP, CATH

Blr1131 protein ; ligands: SIN ; X-RAY DIFFRACTION 1.300Å

e4wbrD1[D:40-196] Image Pymol Jmol Links: PDB, SCOP, CATH

Blr1131 protein ; ligands: CU ; X-RAY DIFFRACTION 1.400Å

e6n5uA1[A:8-168] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein SCO1 homolog 1, mitochondrial ; ligands: CU1 ; X-RAY DIFFRACTION 2.66Å

e6n5uB1[B:8-168] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein SCO1 homolog 1, mitochondrial ; ligands: CU1 ; X-RAY DIFFRACTION 2.66Å

e6n5uC1[C:8-168] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protein SCO1 homolog 1, mitochondrial ; ligands: CU1 ; X-RAY DIFFRACTION 2.66Å

e2b7kA1[A:111-279] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN ; X-RAY DIFFRACTION 1.8Å

e1wp0A1[A:138-297] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SCO1 PROTEIN HOMOLOG ; X-RAY DIFFRACTION 2.8Å

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.

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