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
Representatives:
e2ic2A1[A:466-572] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CG9211-PA ; ligands: SO4 ; X-RAY DIFFRACTION 1.300Å
e2hazA1[A:489-589] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NEURAL CELL ADHESION MOLECULE 1 ; ligands: NA ; X-RAY DIFFRACTION 1.7Å
e1fnaA1[A:6-96] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
FIBRONECTIN CELL-ADHESION MODULE TYPE III-10 ; X-RAY DIFFRACTION 1.8Å
e1bquA2[A:100-214] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (GP130) ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 2.0Å
e1fnfA2[A:1142-1235] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
FIBRONECTIN ; X-RAY DIFFRACTION 2.0Å
e1fnfA3[A:1236-1326] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
FIBRONECTIN ; X-RAY DIFFRACTION 2.0Å
e1fnfA4[A:1327-1415] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
FIBRONECTIN ; X-RAY DIFFRACTION 2.0Å
e1axiB2[B:131-236] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
GROWTH HORMONE RECEPTOR ; ligands: SO4 ; X-RAY DIFFRACTION 2.1Å
e1qg3A1[A:1126-1217] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (INTEGRIN BETA-4 SUBUNIT) ; ligands: SO4 ; X-RAY DIFFRACTION 2.15Å
e1qg3A2[A:1218-1320] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (INTEGRIN BETA-4 SUBUNIT) ; ligands: CAC ; X-RAY DIFFRACTION 2.15Å
e2ibgA2[A:573-667] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CG9211-PA ; ligands: PO4 ; X-RAY DIFFRACTION 2.2Å
e1f6fB2[B:101-203] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROLACTIN RECEPTOR ; X-RAY DIFFRACTION 2.3Å
e2vkwA2[A:601-693] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
NEURAL CELL ADHESION MOLECULE 1,140 KDA ISOFORM ; ligands: SO4 ; X-RAY DIFFRACTION 2.30Å
e1ernA2[A:117-221] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (ERYTHROPOIETIN RECEPTOR) ; X-RAY DIFFRACTION 2.4Å
e1n26A2[A:196-299] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
IL-6 Receptor alpha chain ; ligands: CYS,NAG,SO4 ; X-RAY DIFFRACTION 2.4Å
e1qr4A1[A:1-87] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (TENASCIN) ; X-RAY DIFFRACTION 2.55Å
e1qr4A2[A:88-175] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (TENASCIN) ; X-RAY DIFFRACTION 2.55Å
e1tdqA2[A:94-185] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Tenascin-R ; X-RAY DIFFRACTION 2.57Å
e1tdqA3[A:186-271] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Tenascin-R ; X-RAY DIFFRACTION 2.57Å
e2gysA4[A:317-416] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cytokine receptor common beta chain ; X-RAY DIFFRACTION 2.7Å
e4go6.1[A:360-400,B:1811-1888] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
HCF C-TERMINAL CHAIN 1 & HCF N-TERMINAL CHAIN 1 ; ligands: SO4 ; X-RAY DIFFRACTION 2.7Å
e1fnhA2[A:3-92] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (FIBRONECTIN) ; X-RAY DIFFRACTION 2.8Å
e1fnhA3[A:93-182] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (FIBRONECTIN) ; X-RAY DIFFRACTION 2.8Å
e5fmvA3[A:387-480] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RECEPTOR-TYPE TYROSINE-PROTEIN PHOSPHATASE C ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 2.90Å
e5fmvA4[A:481-574] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
RECEPTOR-TYPE TYROSINE-PROTEIN PHOSPHATASE C ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 2.90Å
e4zxbE2[E:593-637,E:754-807] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Insulin receptor ; ligands: FUC,NAG ; X-RAY DIFFRACTION 3.3Å
e4zxbE3[E:808-909] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Insulin receptor ; ligands: FUC,NAG ; X-RAY DIFFRACTION 3.3Å
e4bk4A4[A:328-437] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
EPHRIN TYPE-A RECEPTOR 4 ; X-RAY DIFFRACTION 3.65Å
e4bk4A5[A:438-540] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
EPHRIN TYPE-A RECEPTOR 4 ; X-RAY DIFFRACTION 3.65Å
e1cfbA1[A:610-709] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
DROSOPHILA NEUROGLIAN ; ligands: NA,NAG,SO4 ; X-RAY DIFFRACTION
e1j8kA1[A:1-94] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
FIBRONECTIN ; SOLUTION NMR
e1k85A1[A:557-644] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
CHITINASE A1 ; SOLUTION NMR
e1owwA1[A:1-93] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Fibronectin first type III module ; SOLUTION NMR
e1tenA1[A:802-891] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,
TENASCIN ; X-RAY DIFFRACTION
e1uc6A1[A:1-109] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Ciliary Neurotrophic Factor Receptor alpha ; SOLUTION NMR
e1va9A1[A:8-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Down syndrome cell adhesion molecule like-protein 1b ; SOLUTION NMR
e1x3dA1[A:8-112] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Fibronectin type-III domain containing protein 3a ; SOLUTION NMR
e1x4xA1[A:8-100] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Fibronectin type-III domain containing protein 3a ; SOLUTION NMR
e1x4yA1[A:8-108] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
biregional cell adhesion molecule-related/down-regulated oncogenes (Cdon)binding protein ; SOLUTION NMR
e1x4zA1[A:8-115] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
biregional cell adhesion molecule-related/down-regulated oncogenes (Cdon)binding protein ; SOLUTION NMR
e1x5aA1[A:8-101] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Ephrin type-A receptor 1 ; SOLUTION NMR
e1x5xA1[A:8-103] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Fibronectin type-III domain containing protein 3a ; SOLUTION NMR
e1x5yA1[A:8-105] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
myosin binding protein C, fast-type ; SOLUTION NMR
e1x5zA1[A:8-109] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Receptor-type tyrosine-protein phosphatase delta ; SOLUTION NMR
e1zlgA3[A:183-286] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anosmin 1 ; SOLUTION SCATTERING
e1zlgA4[A:287-408] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anosmin 1 ; SOLUTION SCATTERING
e1zlgA6[A:532-703] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Anosmin 1 ; SOLUTION SCATTERING
e2crmA1[A:8-114] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Fibronectin type-III domain containing protein 3a ; SOLUTION NMR
e2crzA1[A:8-104] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Fibronectin type-III domain containing protein 3a ; SOLUTION NMR
e2cspA1[A:8-124] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
RIM binding protein 2 ; SOLUTION NMR
e2djsA1[A:8-102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Ephrin type-B receptor 1 ; SOLUTION NMR
Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.
some similarity with Ig fold
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