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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

X: Repetitive alpha hairpins
H: ARM repeat
T: ARM repeat
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.

Representatives:

e3chmA1[A:4-86] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COP9 signalosome complex subunit 7 ; ligands: ACT,MG ; X-RAY DIFFRACTION 1.5Å

e5vxvA1[A:43-259] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Peroxisomal membrane protein PEX15 ; X-RAY DIFFRACTION 1.550Å

e1hxiA1[A:334-445] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PEROXISOME TARGETING SIGNAL 1 RECEPTOR PEX5 ; ligands: MG ; X-RAY DIFFRACTION 1.6Å

e2fbnA1[A:22-174] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

70 kDa peptidylprolyl isomerase, putative ; X-RAY DIFFRACTION 1.63Å

e5d08B3[B:344-376] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Epoxyqueuosine reductase ; X-RAY DIFFRACTION 1.747Å

e1ihgA2[A:197-365] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Cyclophilin 40 ; ligands: GOL ; X-RAY DIFFRACTION 1.8Å

e5wf2A1[A:319-434] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; X-RAY DIFFRACTION 1.85Å

e4apoB1[B:172-325] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AH RECEPTOR-INTERACTING PROTEIN ; ligands: 12P,SO4 ; X-RAY DIFFRACTION 1.9Å

e5jqyA1[A:330-561] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartyl/asparaginyl beta-hydroxylase ; X-RAY DIFFRACTION 1.99Å

e1xqrA1[A:87-350] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HspBP1 protein ; X-RAY DIFFRACTION 2.1Å

e4gmoA2[A:25-322,A:414-675] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative uncharacterized protein ; X-RAY DIFFRACTION 2.1Å

e4nq0A1[A:13-79,A:160-346] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HAT1-interacting factor 1 ; X-RAY DIFFRACTION 2.10Å

e6fndA2[A:518-707] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Apical complex lysine methyltransferase ; ligands: EDO,GOL,SO4,ZN ; X-RAY DIFFRACTION 2.10Å

e5v5tA2[A:74-308] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Conserved domain protein ; X-RAY DIFFRACTION 2.150Å

e6cf9A1[A:18-365] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lytic transglycosylase ; X-RAY DIFFRACTION 2.28Å

e3kaeA3[A:3-242] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Possible protein of nuclear scaffold ; ligands: CL,GOL ; X-RAY DIFFRACTION 2.298Å

e1tjcA1[A:143-237] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Prolyl 4-hydroxylase alpha-1 subunit ; X-RAY DIFFRACTION 2.3Å

e3zpjA1[A:1-356] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TON_1535 ; X-RAY DIFFRACTION 2.3Å

e3n71A2[A:284-468] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histone lysine methyltransferase SmyD1 ; X-RAY DIFFRACTION 2.30Å

e2iw3A2[A:1-332] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ELONGATION FACTOR 3A ; ligands: ADP ; X-RAY DIFFRACTION 2.4Å

e5tqbB1[B:27-361] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Assembly chaperone of ribosomal protein L4 (Acl4) ; ligands: EDO,PEG ; X-RAY DIFFRACTION 2.4Å

e5t87C1[C:2-116] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CdiI immunity protein ; X-RAY DIFFRACTION 2.40Å

e5jzuA1[A:330-562] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartyl/asparaginyl beta-hydroxylase ; X-RAY DIFFRACTION 2.50Å

e5xxeA1[A:1-248] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protection of telomeres protein poz1 ; ligands: SO4,ZN ; X-RAY DIFFRACTION 2.500Å

e5z2cA1[A:2-446] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Alpha-protein kinase 1 ; ligands: AYU ; X-RAY DIFFRACTION 2.59Å

e5d6sA2[A:307-370] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Epoxyqueuosine reductase ; X-RAY DIFFRACTION 2.65Å

e5ve8B1[B:40-1113] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Kap123 ; X-RAY DIFFRACTION 2.7Å

e4rouA1[A:277-329] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Mitochondrial ribonuclease P protein 3 ; X-RAY DIFFRACTION 2.713Å

e3t5vB1[B:2-337] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nuclear mRNA export protein THP1 ; X-RAY DIFFRACTION 2.9Å

e2gw1A1[A:94-222,A:250-607] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Mitochondrial precursor proteins import receptor ; X-RAY DIFFRACTION 3.0Å

e6h3zA1[A:1454-1661] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCR4-not transcription complex subunit 1 ; ligands: NA ; X-RAY DIFFRACTION 3.0Å

e3qnfA5[A:752-757,A:800-810,A:915-935] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Endoplasmic reticulum aminopeptidase 1 ; X-RAY DIFFRACTION 3.00Å

e5u1sA3[A:53-1132] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Separin ; X-RAY DIFFRACTION 3.000Å

e5l0wB1[B:5-213] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Sec72 ; X-RAY DIFFRACTION 3.035Å

e5aioA1[A:131-565] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TRANSCRIPTION FACTOR TAU 131 KDA SUBUNIT ; X-RAY DIFFRACTION 3.15Å

e4r8aA3[A:213-346] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein ; X-RAY DIFFRACTION 3.17Å

e5wy3B1[B:17-402] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Putative uncharacterized protein ; X-RAY DIFFRACTION 3.200Å

e6f5dL1[L:6-170] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ATP synthase subunit p18, mitochondrial ; X-RAY DIFFRACTION 3.200Å

e4n5cD1[D:12-817] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CARGO-TRANSPORT PROTEIN YPP1 ; X-RAY DIFFRACTION 3.25Å

e6zpnB2[B:212-249,B:601-897,B:939-991,B:1090-1133] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

WD_REPEATS_REGION domain-containing protein ; X-RAY DIFFRACTION 3.5Å

e4d10L3[L:182-289] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COP9 SIGNALOSOME COMPLEX SUBUNIT 4 ; X-RAY DIFFRACTION 3.80Å

e4fhmB5[B:809-961] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Nucleoporin nup120 ; X-RAY DIFFRACTION 4.339Å

e3j8bM1[M:188-267] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Eukaryotic translation initiation factor 3 subunit M ; ELECTRON MICROSCOPY

e3javA7[A:728-791,A:825-900,A:960-1102] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Inositol 1,4,5-trisphosphate receptor type 1 ; ELECTRON MICROSCOPY

e4ui9C3[C:467-557] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CELL DIVISION CYCLE PROTEIN 23 HOMOLOG ; ELECTRON MICROSCOPY

e4ui9N1[N:15-431] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANAPHASE-PROMOTING COMPLEX SUBUNIT 2 ; ELECTRON MICROSCOPY

e4ui9N2[N:432-563] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANAPHASE-PROMOTING COMPLEX SUBUNIT 2 ; ELECTRON MICROSCOPY

e4ui9Y1[Y:36-552] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANAPHASE-PROMOTING COMPLEX SUBUNIT 7 ; ELECTRON MICROSCOPY

e5g04X1[X:36-110,X:132-540] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

ANAPHASE-PROMOTING COMPLEX SUBUNIT 7 ; ELECTRON MICROSCOPY

e5ganJ1[J:155-898] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor 6 ; ELECTRON MICROSCOPY

e5gm6v1[v:551-753] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pre-mRNA-splicing factor SYF1 ; ELECTRON MICROSCOPY

e5jpqG1[G:2106-3241] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

UTP10 ; ELECTRON MICROSCOPY

e5uz5D1[D:2-540] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

e5uz5E1[E:65-285,E:288-532] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

e5wsgv1[v:156-819] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Syf1,Pre-mRNA-splicing factor SYF1,Syf1,Pre-mRNA-splicing factor SYF1,Syf1,Pre-mRNA-splicing factor SYF1,Syf1 ; ELECTRON MICROSCOPY

e6bqsA1[A:22-222] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

hypothetical protein PG_2227 ; SOLUTION NMR

e6hiwDJ1[DJ:10-324] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

mS57 ; ligands: UTP ; ELECTRON MICROSCOPY

e6ke6AE2[AE:463-808] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

U3 small nucleolar RNA-associated protein 10 ; ELECTRON MICROSCOPY

e8a3tD2[D:573-626] * nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Anaphase-promoting complex subunit CDC23 ; ELECTRON MICROSCOPY

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