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:
e1bg1A1[A:322-465] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
PROTEIN (TRANSCRIPTION FACTOR STAT3B) ; X-RAY DIFFRACTION 2.25Å
e4e68A2[A:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 3 ; X-RAY DIFFRACTION 2.58Å
e3cwgA6[A:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 3 ; X-RAY DIFFRACTION 3.05Å
e1yvlB1[B:1318-1459] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 1-ALPHA/BETA ; ligands: AU ; X-RAY DIFFRACTION 3.0Å
e1yvlA5[A:299-431] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 1-ALPHA/BETA ; ligands: AU ; X-RAY DIFFRACTION 3.0Å
e1bf5A2[A:309-450] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 1-ALPHA/BETA ; X-RAY DIFFRACTION 2.900Å
e3cwgB2[B:1322-1465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
SIGNAL TRANSDUCER AND ACTIVATOR OF TRANSCRIPTION 3 ; X-RAY DIFFRACTION 3.05Å
e1y1uC2[C:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 3.21Å
e1y1uA4[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 3.21Å
e1y1uB4[B:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 3.21Å
e4y5uB1[B:274-414] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 6 ; X-RAY DIFFRACTION 2.70Å
e4y5uA1[A:274-414] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 6 ; X-RAY DIFFRACTION 2.70Å
e4y5wA4[A:274-414] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 6 ; X-RAY DIFFRACTION 3.10Å
e4y5wB2[B:274-414] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 6 ; X-RAY DIFFRACTION 3.10Å
e6qhdA4[A:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 3 ; X-RAY DIFFRACTION 2.85Å
e6mbwA2[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5B ; X-RAY DIFFRACTION 3.290Å
e6qhdB2[B:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 3 ; X-RAY DIFFRACTION 2.85Å
e6mbwB4[B:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5B ; X-RAY DIFFRACTION 3.290Å
e6mbzA4[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5B ; X-RAY DIFFRACTION 3.210Å
e6mbzB3[B:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5B ; X-RAY DIFFRACTION 3.210Å
e6njsA2[A:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 3 ; X-RAY DIFFRACTION 2.700Å
e6nuqA1[A:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 3 ; X-RAY DIFFRACTION 3.150Å
e6tlcA1[A:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 3 ; X-RAY DIFFRACTION 2.9Å
e6tlcB1[B:322-465] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 3 ; X-RAY DIFFRACTION 2.9Å
e6ux2A4[A:317-457] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 2 ; X-RAY DIFFRACTION 3.008Å
e7nufA1[A:318-459] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 1-alpha/beta ; X-RAY DIFFRACTION 2.00Å
e8d3fA2[A:309-450] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 1-alpha/beta,Inhibitor of STAT1-dependent transcription TgIST ; X-RAY DIFFRACTION 2.97Å
e7znnD2[D:318-457] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription ; ELECTRON MICROSCOPY
e7tvaA1[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 2.834Å
e7tvaB2[B:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 2.834Å
e7tvbA3[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; ligands: GOL ; X-RAY DIFFRACTION 2.650Å
e7ubtA2[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 2.350Å
e7uc6A4[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; X-RAY DIFFRACTION 3.100Å
e7uc7A3[A:333-470] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 5A ; ligands: GOL ; X-RAY DIFFRACTION 3.100Å
e6wczA2[A:317-509] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Signal transducer and activator of transcription 2 ; ELECTRON MICROSCOPY
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