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:
e4a5wA6[A:566-611,A:766-821] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COMPLEMENT C5 ; X-RAY DIFFRACTION 3.50Å
e3pvmB6[B:544-648,B:735-811] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å
e2b39B3[B:558-597,B:748-811] Image Pymol Jmol Links: PDB, SCOP, CATH
e3prxD4[D:544-646,D:736-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å
e3pvmD4[D:544-648,D:735-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å
e3prxB16[B:544-646,B:736-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COBRA VENOM FACTOR ; X-RAY DIFFRACTION 4.3Å
e2b39A1[A:558-597,A:748-811] Image Pymol Jmol Links: PDB, SCOP, CATH
e5i5kB5[B:566-679,B:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Complement C5 ; X-RAY DIFFRACTION 4.2Å
e5i5kA5[A:566-679,A:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Complement C5 ; X-RAY DIFFRACTION 4.2Å
e4acqA12[A:564-632,A:662-689,A:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH
e4acqB12[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH
e4acqD12[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH
e3pvmA17[A:566-679,A:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COMPLEMENT C5 ; X-RAY DIFFRACTION 4.3Å
e3pvmC23[C:566-679,C:758-821] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
COMPLEMENT C5 ; X-RAY DIFFRACTION 4.3Å
e4acqC6[C:564-632,C:662-689,C:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH
e4d94A5[A:515-603,A:630-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thioester-containing protein 1 ; ligands: NAG ; X-RAY DIFFRACTION 2.700Å
e4lnvA4[A:515-605,A:629-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 3.700Å
e4lnvC4[C:515-605,C:629-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 3.700Å
e2pn5A5[A:495-582,A:609-662] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thioester-containing protein I ; ligands: NAG ; X-RAY DIFFRACTION 2.698Å
e4lnvB18[B:515-592,B:629-683] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Thioester-containing protein I ; X-RAY DIFFRACTION 3.700Å
e6i2xB1[B:544-645,B:738-811] Image Pymol Jmol Links: PDB, SCOP, CATH
e6tavA2[A:564-700,A:729-789] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å
e6tavC2[C:564-691,C:728-789] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å
e7nycA4[A:548-655,A:750-802] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Complement C5 ; ELECTRON MICROSCOPY
e7nydA4[A:548-655,A:750-802] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Complement C5 ; ELECTRON MICROSCOPY
e7q60A4[A:558-633,A:669-695,A:729-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; ELECTRON MICROSCOPY
e7q61A4[A:558-633,A:669-694,A:726-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; ligands: NAG ; ELECTRON MICROSCOPY
e7q62A7[A:558-633,A:669-695,A:729-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; ligands: NAG ; ELECTRON MICROSCOPY
e7q1yA4[A:558-625,A:670-695,A:728-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; X-RAY DIFFRACTION 4.276Å
e7q1yB6[B:558-625,B:670-695,B:728-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; X-RAY DIFFRACTION 4.276Å
e7q5zA6[A:558-633,A:670-695,A:730-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; ELECTRON MICROSCOPY
e7q62B1[B:558-633,B:669-695,B:726-788] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin-like protein 1 ; ligands: NAG ; ELECTRON MICROSCOPY
e6tavB4[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å
e6tavD2[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; X-RAY DIFFRACTION 4.20Å
e7o7nA3[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7nC7[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7oA4[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ligands: NAG ; ELECTRON MICROSCOPY
e7o7oC8[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ligands: NAG ; ELECTRON MICROSCOPY
e7o7pA4[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7pB4[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7pC3[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7pD2[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7qA6[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7qB5[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7qC4[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7qD5[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7rA3[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7rB7[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7rC1[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7rD2[D:564-632,D:662-690,D:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7sA2[A:564-632,A:662-690,A:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7sB3[B:564-632,B:662-690,B:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7sC8[C:564-632,C:662-690,C:730-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7lA8[A:564-632,A:662-689,A:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7lB8[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7lC4[C:564-632,C:662-689,C:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7lD6[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7mA1[A:564-632,A:662-689,A:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7mB8[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7mC8[C:564-632,C:662-689,C:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7mD8[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7nB8[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7nD1[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7oB5[B:564-632,B:662-689,B:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7oD2[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e7o7sD3[D:564-632,D:662-689,D:729-790] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Alpha-2-macroglobulin ; ELECTRON MICROSCOPY
e8ayhB6[B:544-645,B:738-811] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI
Cobra venom factor ; 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