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
Representatives:
e2ih2A1[A:244-413] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; X-RAY DIFFRACTION 1.6Å
e7lt5B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.54Å
e7lniA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.68Å
e7lniB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.68Å
e7lniC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.68Å
e7lnjA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.68Å
e7lnjB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.68Å
e7lnjC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.68Å
e7lt5A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.54Å
e7lt5C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.54Å
e7rfkA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.05Å
e7rfkB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.05Å
e7rfkC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.05Å
e7rflA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.38Å
e7rflB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.38Å
e7rflC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.38Å
e7rfmA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.68Å
e7rfmB2[B:317-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.68Å
e7rfmC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.68Å
e7rfnA2[A:317-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.50Å
e7rfnB2[B:317-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.50Å
e7rfnC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.50Å
e8cxsA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.49Å
e8cxsB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.49Å
e8cxsC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.49Å
e8cxtA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; X-RAY DIFFRACTION 2.61Å
e8cxtB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.61Å
e8cxtC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.61Å
e8cxuA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.28Å
e8cxuB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.28Å
e8cxuC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.28Å
e8cxvA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.26Å
e8cxvB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.26Å
e8cxvC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.26Å
e8cxwA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.78Å
e8cxwB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.78Å
e8cxwC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.78Å
e8cxxA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.34Å
e8cxxB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.34Å
e8cxxC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.34Å
e8cxyA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.19Å
e8cxyB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.19Å
e8cxyC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.19Å
e8cxzA2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.35Å
e8cxzB2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.35Å
e8cxzC2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.35Å
e8cy0A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.65Å
e8cy0B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.65Å
e8cy0C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.65Å
e8cy1A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.38Å
e8cy1B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.38Å
e8cy1C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.38Å
e8cy2A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.81Å
e8cy2B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.81Å
e8cy2C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.81Å
e8cy3A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.65Å
e8cy3B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.65Å
e8cy3C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.65Å
e8cy4A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.34Å
e8cy4B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.34Å
e8cy4C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.34Å
e8cy5A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.50Å
e8cy5B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.50Å
e8cy5C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.50Å
e8fs1A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.74Å
e8fs1B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.74Å
e8fs1C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.74Å
e8fs2A2[A:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO ; X-RAY DIFFRACTION 2.59Å
e8fs2B2[B:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: EDO,K ; X-RAY DIFFRACTION 2.59Å
e8fs2C2[C:335-577] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Site-specific DNA-methyltransferase (adenine-specific) ; ligands: K ; X-RAY DIFFRACTION 2.59Å
e1aqiA1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ADENINE-N6-DNA-METHYLTRANSFERASE TAQI ; X-RAY DIFFRACTION 2.6Å
e1aqiB1[B:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ADENINE-N6-DNA-METHYLTRANSFERASE TAQI ; X-RAY DIFFRACTION 2.6Å
e1aqjA1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ADENINE-N6-DNA-METHYLTRANSFERASE TAQI ; X-RAY DIFFRACTION 2.6Å
e1aqjB1[B:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ADENINE-N6-DNA-METHYLTRANSFERASE TAQI ; X-RAY DIFFRACTION 2.6Å
e1g38A1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MODIFICATION METHYLASE TAQI ; X-RAY DIFFRACTION 2.0Å
e1g38D1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MODIFICATION METHYLASE TAQI ; X-RAY DIFFRACTION 2.0Å
e2admA1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ADENINE-N6-DNA-METHYLTRANSFERASE TAQI ; X-RAY DIFFRACTION
e2admB1[B:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
ADENINE-N6-DNA-METHYLTRANSFERASE TAQI ; X-RAY DIFFRACTION
e2ibsA1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Modification methylase TaqI ; X-RAY DIFFRACTION 2.4Å
e2ibsD1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Modification methylase TaqI ; X-RAY DIFFRACTION 2.4Å
e2ibtA1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Modification methylase TaqI ; ligands: GOL ; X-RAY DIFFRACTION 1.7Å
e2ibtD1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Modification methylase TaqI ; X-RAY DIFFRACTION 1.7Å
e2ih2D1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; X-RAY DIFFRACTION 1.6Å
e2ih4A1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; X-RAY DIFFRACTION 2.1Å
e2ih4D1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; X-RAY DIFFRACTION 2.1Å
e2jg3A1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MODIFICATION METHYLASE TAQI ; X-RAY DIFFRACTION 1.90Å
e2jg3D1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
MODIFICATION METHYLASE TAQI ; X-RAY DIFFRACTION 1.90Å
e2np6A1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; ligands: IPA ; X-RAY DIFFRACTION 2.1Å
e2np6D1[D:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; ligands: IPA ; X-RAY DIFFRACTION 2.1Å
e2np7A1[A:244-413] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; X-RAY DIFFRACTION 1.9Å
e2ih5A1[A:244-410] Image Pymol Jmol Links: PDB, SCOP, CATH
Modification methylase TaqI ; X-RAY DIFFRACTION 1.8Å
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